rc-1.7.4/0000755000175000017500000000000012524740603007133 500000000000000rc-1.7.4/rc.h0000644000175000017500000002174312515531750007640 00000000000000#undef NDEBUG #include "config.h" #include "proto.h" #include #define RC "rc: " /* datatypes */ #define ENV_SEP '\001' #define ENV_ESC '\002' /* braindamaged IBM header files #define true and false */ #undef FALSE #undef TRUE typedef void builtin_t(char **); typedef struct Block Block; typedef struct Dup Dup; typedef struct Estack Estack; typedef struct rc_Function rc_Function; typedef struct Hq Hq; typedef struct Htab Htab; typedef struct Jbwrap Jbwrap; typedef struct List List; typedef struct Node Node; typedef struct Pipe Pipe; typedef struct Redir Redir; typedef struct Rq Rq; typedef struct Variable Variable; typedef struct Word Word; typedef struct Format Format; typedef union Edata Edata; typedef enum nodetype { nAndalso, nAssign, nBackq, nBang, nBody, nCbody, nNowait, nBrace, nConcat, nCount, nElse, nFlat, nDup, nEpilog, nNewfn, nForin, nIf, nOrelse, nPipe, nPre, nRedir, nRmfn, nArgs, nSubshell, nCase, nSwitch, nMatch, nVar, nVarsub, nWhile, nWord, nLappend, nNmpipe } nodetype; typedef enum ecodes { eError, eBreak, eReturn, eVarstack, eArena, eFifo, eFd } ecodes; typedef enum bool { FALSE, TRUE } bool; typedef enum redirtype { rFrom, rCreate, rAppend, rHeredoc, rHerestring } redirtype; typedef bool (*Conv)(Format *, int); union Edata { Jbwrap *jb; Block *b; char *name; int fd; }; struct Estack { ecodes e; bool interactive; Edata data; Estack *prev; }; struct List { char *w, *m; List *n; }; struct Node { nodetype type; union { char *s; int i; Node *p; } u[4]; }; struct Pipe { int left, right; }; struct Dup { redirtype type; int left, right; }; struct Redir { redirtype type; int fd; }; struct Word { char *w, *m; bool q; }; struct Rq { Node *r; struct Rq *n; }; struct rc_Function { Node *def; char *extdef; }; struct Variable { List *def; char *extdef; Variable *n; }; struct Htab { char *name; void *p; }; struct Format { /* for the formatting routines */ va_list args; long flags, f1, f2; /* for the buffer maintenance routines */ char *buf, *bufbegin, *bufend; int flushed; void (*grow)(Format *, size_t); union { int n; void *p; } u; }; /* Format->flags values */ enum { FMT_quad = 1, /* %q */ FMT_long = 2, /* %l */ FMT_unsigned = 8, /* %u */ FMT_zeropad = 16, /* %0 */ FMT_leftside = 32, /* %- */ FMT_altform = 64, /* %# */ FMT_f1set = 128, /* % */ FMT_f2set = 256 /* %. */ }; /* macros */ #define EOF (-1) #ifndef NULL #define NULL 0 #endif #define a2u(x) n2u(x, 10) #define o2u(x) n2u(x, 8) #define arraysize(a) ((int)(sizeof(a)/sizeof(*a))) #define memzero(s, n) memset(s, 0, n) #define enew(x) ((x *) ealloc(sizeof(x))) #define ecpy(x) strcpy((char *) ealloc(strlen(x) + 1), x) #define lookup_fn(s) ((rc_Function *) lookup(s, fp)) #define lookup_var(s) ((Variable *) lookup(s, vp)) #define nnew(x) ((x *) nalloc(sizeof(x))) #define ncpy(x) (strcpy((char *) nalloc(strlen(x) + 1), x)) #ifndef offsetof #define offsetof(t, m) ((size_t) (((char *) &((t *) 0)->m) - (char *)0)) #endif #define streq(x, y) (*(x) == *(y) && strcmp(x, y) == 0) #define conststrlen(x) (sizeof (x) - 1) /* rc prototypes */ /* main.c */ extern Rq *redirq; extern bool dashdee, dashee, dashvee, dashex, dasheye, dashen, dashpee, interactive; extern pid_t rc_pid; extern int lineno; /* builtins.c */ extern builtin_t *isbuiltin(char *); extern void b_exec(char **), funcall(char **), b_dot(char **), b_builtin(char **); extern char *which(char *, bool); /* except.c */ extern bool nl_on_intr; extern bool outstanding_cmdarg(void); extern void pop_cmdarg(bool); extern void rc_raise(ecodes); extern void except(ecodes, Edata, Estack *); extern void unexcept(void); extern void rc_error(char *); extern void sigint(int); /* exec.c */ extern void exec(List *, bool); #if HASH_BANG #define rc_execve execve #else /* execve.c */ extern int my_execve(char *, char **, char **); #endif /* footobar.c */ extern char **list2array(List *, bool); extern char *get_name(char *); extern List *parse_var(char *); extern Node *parse_fn(char *); extern void initprint(void); extern void rc_exit(int); /* here for odd reasons; user-defined signal handlers are kept in fn.c */ /* getopt.c */ extern int rc_getopt(int, char **, char *); extern int rc_optind, rc_opterr, rc_optopt; extern char *rc_optarg; /* glob.c */ extern bool lmatch(List *, List *); extern List *glob(List *); /* glom.c */ extern void assign(List *, List *, bool); extern void qredir(Node *); extern List *append(List *, List*); extern List *flatten(List *); extern List *glom(Node *); extern List *concat(List *, List *); extern List *varsub(List *, List *); extern List *word(char *, char *); /* hash.c */ extern Htab *fp, *vp; extern void *lookup(char *, Htab *); extern rc_Function *get_fn_place(char *); extern List *varlookup(char *); extern Node *fnlookup(char *); extern Variable *get_var_place(char *, bool); extern bool varassign_string(char *); extern char **makeenv(void); extern char *fnlookup_string(char *); extern char *varlookup_string(char *); extern void alias(char *, List *, bool); extern void starassign(char *, char **, bool); extern void delete_fn(char *); extern void delete_var(char *, bool); extern void fnassign(char *, Node *); extern void fnassign_string(char *); extern void fnrm(char *); extern void initenv(char **); extern void inithash(void); extern void set_exportable(char *, bool); extern void setsigdefaults(bool); extern void inithandler(void); extern void varassign(char *, List *, bool); extern void varrm(char *, bool); extern void whatare_all_vars(bool, bool); extern void whatare_all_signals(void); extern void prettyprint_var(int, char *, List *); extern void prettyprint_fn(int, char *, Node *); /* heredoc.c */ extern int heredoc(int); extern int qdoc(Node *, Node *); extern Hq *hq; /* lex.c */ extern bool quotep(char *, bool); extern int yylex(void); extern void inityy(void); extern void yyerror(const char *); extern void scanerror(char *); extern const char nw[], dnw[]; /* list.c */ extern void listfree(List *); extern List *listcpy(List *, void *(*)(size_t)); extern size_t listlen(List *); extern int listnel(List *); /* match.c */ extern bool match(char *, char *, char *); /* alloc.c */ extern void *ealloc(size_t); extern void *erealloc(void *, size_t); extern void efree(void *); extern Block *newblock(void); extern void *nalloc(size_t); extern void nfree(void); extern void restoreblock(Block *); /* open.c */ extern int rc_open(const char *, redirtype); extern bool makeblocking(int); extern bool makesamepgrp(int); /* print.c */ /* The following prototype should be: extern Conv fmtinstall(int, Conv); but this freaks out SGI's compiler under IRIX3.3.2 */ extern bool (*fmtinstall(int, bool (*)(Format *, int)))(Format *, int); extern int printfmt(Format *, const char *); extern int fmtprint(Format *, const char *,...); extern void fmtappend(Format *, const char *, size_t); extern void fmtcat(Format *, const char *); extern int fprint(int fd, const char *fmt,...); extern char *mprint(const char *fmt,...); extern char *nprint(const char *fmt,...); /* the following macro should by rights be coded as an expression, not a statement, but certain compilers (notably DEC) have trouble with void expressions inside the ?: operator. (sheesh, give me a break!) */ #define fmtputc(f, c) {\ if ((f)->buf >= (f)->bufend)\ (*(f)->grow)((f), (size_t)1);\ *(f)->buf++ = (c);\ } /* parse.c (parse.y) */ extern Node *parsetree; extern int yyparse(void); extern void initparse(void); /* readline */ extern volatile sig_atomic_t rl_active; extern struct Jbwrap rl_buf; /* redir.c */ extern void doredirs(void); /* signal.c */ extern void initsignal(void); extern void catcher(int); extern void sigchk(void); extern void (*rc_signal(int, void (*)(int)))(int); extern void (*sys_signal(int, void (*)(int)))(int); extern void (*sighandlers[])(int); /* status.c */ extern int istrue(void); extern int getstatus(void); extern void set(bool); extern void setstatus(pid_t, int); extern List *sgetstatus(void); extern void setpipestatus(int [], int); extern void statprint(pid_t, int); extern void ssetstatus(char **); extern char *strstatus(int s); /* system.c or system-bsd.c */ extern void writeall(int, char *, size_t); #if HAVE_RESTARTABLE_SYSCALLS extern int rc_read(int, char *, size_t); extern pid_t rc_wait(int *); extern Jbwrap slowbuf; extern volatile sig_atomic_t slow; #else /* HAVE_RESTARTABLE_SYSCALLS */ #define rc_read read #define rc_wait wait #endif /* HAVE_RESTARTABLE_SYSCALLS */ /* tree.c */ extern Node *mk(int /*nodetype*/,...); extern Node *treecpy(Node *, void *(*)(size_t)); extern void treefree(Node *); /* utils.c */ extern bool isabsolute(char *); extern int n2u(char *, unsigned int); extern int mvfd(int, int); extern int starstrcmp(const void *, const void *); extern void pr_error(char *, int); extern void panic(char *); extern void uerror(char *); /* wait.c */ extern pid_t rc_fork(void); extern pid_t rc_wait4(pid_t, int *, bool); extern List *sgetapids(void); extern void waitforall(void); extern bool forked; /* walk.c */ extern bool walk(Node *, bool); extern bool cond; rc-1.7.4/wait.c0000644000175000017500000000364012507445074010173 00000000000000#include "rc.h" #include #include "wait.h" bool forked = FALSE; typedef struct Pid Pid; static struct Pid { pid_t pid; int stat; bool alive; Pid *n; } *plist = NULL; extern pid_t rc_fork() { Pid *new; struct Pid *p, *q; pid_t pid = fork(); switch (pid) { case -1: uerror("fork"); rc_error(NULL); /* NOTREACHED */ case 0: forked = TRUE; sigchk(); p = plist; q = 0; while (p) { if (q) efree(q); q = p; p = p->n; } if (q) efree(q); plist = 0; return 0; default: new = enew(Pid); new->pid = pid; new->alive = TRUE; new->n = plist; plist = new; return pid; } } extern pid_t rc_wait4(pid_t pid, int *stat, bool nointr) { Pid *r, *prev; /* Find the child on the list. */ for (r = plist, prev = NULL; r != NULL; prev = r, r = r->n) if (r->pid == pid) break; /* Uh-oh, not there. */ if (r == NULL) { errno = ECHILD; /* no children */ uerror("wait"); *stat = 0x100; /* exit(1) */ return -1; } /* If it's still alive, wait() for it. */ while (r->alive) { int ret; Pid *q; ret = rc_wait(stat); if (ret < 0) { if (errno == ECHILD) panic("lost child"); if (nointr) continue; else return ret; } for (q = plist; q != NULL; q = q->n) if (q->pid == ret) { q->alive = FALSE; q->stat = *stat; break; } } *stat = r->stat; if (prev == NULL) plist = r->n; /* remove element from head of list */ else prev->n = r->n; efree(r); return pid; } extern List *sgetapids() { List *r; Pid *p; for (r = NULL, p = plist; p != NULL; p = p->n) { List *q; if (!p->alive) continue; q = nnew(List); q->w = nprint("%d", p->pid); q->m = NULL; q->n = r; r = q; } return r; } extern void waitforall() { int stat; while (plist != NULL) { pid_t pid = rc_wait4(plist->pid, &stat, FALSE); if (pid > 0) setstatus(pid, stat); else { set(FALSE); if (errno == EINTR) return; } sigchk(); } } rc-1.7.4/INSTALL0000644000175000017500000003660512515531750010117 00000000000000Installation Instructions ************************* Copyright (C) 1994-1996, 1999-2002, 2004-2013 Free Software Foundation, Inc. Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. This file is offered as-is, without warranty of any kind. Basic Installation ================== Briefly, the shell commands `./configure; make; make install' should configure, build, and install this package. The following more-detailed instructions are generic; see the `README' file for instructions specific to this package. Some packages provide this `INSTALL' file but do not implement all of the features documented below. The lack of an optional feature in a given package is not necessarily a bug. More recommendations for GNU packages can be found in *note Makefile Conventions: (standards)Makefile Conventions. The `configure' shell script attempts to guess correct values for various system-dependent variables used during compilation. It uses those values to create a `Makefile' in each directory of the package. 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So, if you need `/usr/ucb' in your `PATH', put it _after_ `/usr/bin'. On Haiku, software installed for all users goes in `/boot/common', not `/usr/local'. It is recommended to use the following options: ./configure --prefix=/boot/common Specifying the System Type ========================== There may be some features `configure' cannot figure out automatically, but needs to determine by the type of machine the package will run on. Usually, assuming the package is built to be run on the _same_ architectures, `configure' can figure that out, but if it prints a message saying it cannot guess the machine type, give it the `--build=TYPE' option. TYPE can either be a short name for the system type, such as `sun4', or a canonical name which has the form: CPU-COMPANY-SYSTEM where SYSTEM can have one of these forms: OS KERNEL-OS See the file `config.sub' for the possible values of each field. 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Defining Variables ================== Variables not defined in a site shell script can be set in the environment passed to `configure'. However, some packages may run configure again during the build, and the customized values of these variables may be lost. In order to avoid this problem, you should set them in the `configure' command line, using `VAR=value'. For example: ./configure CC=/usr/local2/bin/gcc causes the specified `gcc' to be used as the C compiler (unless it is overridden in the site shell script). Unfortunately, this technique does not work for `CONFIG_SHELL' due to an Autoconf limitation. Until the limitation is lifted, you can use this workaround: CONFIG_SHELL=/bin/bash ./configure CONFIG_SHELL=/bin/bash `configure' Invocation ====================== `configure' recognizes the following options to control how it operates. `--help' `-h' Print a summary of all of the options to `configure', and exit. `--help=short' `--help=recursive' Print a summary of the options unique to this package's `configure', and exit. The `short' variant lists options used only in the top level, while the `recursive' variant lists options also present in any nested packages. `--version' `-V' Print the version of Autoconf used to generate the `configure' script, and exit. `--cache-file=FILE' Enable the cache: use and save the results of the tests in FILE, traditionally `config.cache'. FILE defaults to `/dev/null' to disable caching. `--config-cache' `-C' Alias for `--cache-file=config.cache'. `--quiet' `--silent' `-q' Do not print messages saying which checks are being made. To suppress all normal output, redirect it to `/dev/null' (any error messages will still be shown). `--srcdir=DIR' Look for the package's source code in directory DIR. Usually `configure' can determine that directory automatically. `--prefix=DIR' Use DIR as the installation prefix. *note Installation Names:: for more details, including other options available for fine-tuning the installation locations. `--no-create' `-n' Run the configure checks, but stop before creating any output files. `configure' also accepts some other, not widely useful, options. Run `configure --help' for more details. rc-1.7.4/EXAMPLES0000644000175000017500000004044512507445074010230 00000000000000There is no repository for useful rc code snippets as yet, so I'm including a (short) file in the distribution with some helpful/intriguing pieces of rc code. A sample .rcrc -------------- Here is the .rcrc I use on archone: umask 022 path=(/bin /usr/bin /usr/ucb) ht=`/usr/arch/bin/hosttype h=$home history=$h/.history bin=$h/bin/$ht lib=$h/lib/$ht sh=$h/bin/sh include=$h/lib/include switch ($ht) { case sun* OBERON='. '$h/other/oberon p=/usr/ucb compiler='gcc -Wall -O -g' MANPATH=$h/man:/usr/arch/man:/usr/man if (! ~ $TERM ()) { stty dec /usr/arch/bin/msgs -q } case next p=(/usr/ucb /usr/bin /NextApps) compiler='cc -Wall -O -g -DNODIRENT' MANPATH=$h/man:/usr/arch/man:/usr/man if (! ~ $TERM ()) stty dec case sgi p=(/usr/ucb /usr/sbin /usr/bin) compiler='gcc -Wall -O -g -DNOSIGCLD' MANPATH=$h/man:/usr/arch/man:/usr/catman if (!{~ $TERM () || ~ $TERM *iris*}) stty line 1 intr '' erase '' kill '' case * echo .rcrc not configured for this machine } path=(. $sh $bin /usr/arch/bin $p /bin /usr/bin/X11 /etc /usr/etc) cdpath=(. .. $h $h/src $h/misc $h/other $h/adm) RNINIT=-d$h' -t -M -2400-h -2400+hfrom'; DOTDIR=$h/misc/news PRINTER=lw fn s { echo $status } fn cd { builtin cd $1 && \ switch ($1) { case () dir=$home case * dir=() } } fn pwd { if (~ $dir ()) dir=`/bin/pwd echo $dir } fn x { if (~ `tty /dev/console) clear_colormap clear exit } fn p { if (~ $history ()) { echo '$history not set' >[1=2] return 1 } if (! ~ $#* 0 1 2) { echo usage: $0 '[egrep pattern] [sed command]' >[1=2] return 1 } command=`{ egrep -v '^[ ]*p([ ]+|$)' $history | switch ($#*) { case 0 cat case 1 egrep $1 case 2 egrep $1 | sed $2 } | tail -1 } echo $command eval $command } if (~ $TERM dialup network) { TERM=vt100 biff y } A front-end to NeXT's "openfile" -------------------------------- Named after the sam "B" command for opening a file, this script was written by Paul Haahr. (Assumes the "pick" command from Kernighan and Pike is also in your path.) #!/bin/rc if (~ $#* 0) exec openfile create = () files = () for (i in $*) if (test -f $i) { files = ($files $i) } else { create = ($create $i) } create = `{ pick $create } files = ($files $create) for (i in $create) > $i if (! ~ $#files 0) openfile $files A read function --------------- Unlike sh, rc doesn't have a read. This clever alternative returns an exit status as well as fetch a variable. Use as read foo to set $foo to a single line from the terminal. (due to John Mackin ) fn read { x=() { x = `` ($nl) { awk '{print; print 0; exit}' ^ $nl ^ \ 'END {print 1; print 1}' } $1 = $x(1) return $x(2) } } From cs.wisc.edu!dws Fri Aug 2 18:16:14 1991 #------- # ls front end #------- fn ls \ { test -t 1 && * = (-FCb $*) builtin ls $* } #------- # nl - holds a newline, useful in certain command substitutions #------- nl=' ' #------- # show - tell me about a name # # Runs possibly dangerous things through cat -v in order to protect # me from the effects of control characters I might have in the # environment. #------- fn show \ { * = `` $nl {whatis -- $*} for(itis) { switch($^itis) { case 'fn '* ; echo $itis | cat -v -t case builtin* ; echo $itis case /* ; file $itis; ls -ld $itis case *'='* ; echo $itis | cat -v -t case * ; echo $itis: UNKNOWN: update show } } itis = () } #------- # Tell me automatically when a command has a nonzero status. #------- fn prompt \ { Status = $status ~ $Status 0 || echo '[status '$Status']' } #------- # chop - echo the given list, less its final member # # e.g. chop (a b c) -> (a b) #------- fn chop { ~ $#* 0 1 && return 0 ans = '' { # local variable ans = () while(! ~ $#* 1) { ans = ($ans $1) shift } echo $ans } } From arnold@audiofax.com Thu May 30 08:49:51 1991 # cd.rc --- souped up version of cd # this is designed to emulate the fancy version of cd in ksh, # so if you're a purist, feel free to gag _cwd=$home _oldcwd=$home fn cd { if (~ $#* 0) { if (~ $_cwd $home) { # do nothing } else { builtin cd && { _oldcwd=$_cwd ; _cwd=$home } } } else if (~ $#* 1) { if (~ $1 -) { _t=$_cwd builtin cd $_oldcwd && { _cwd=$_oldcwd _oldcwd=$_t echo $_cwd } _t=() } else { # if a cd happens through the cdpath, rc echos # the directory on its own. all we have to do # is track where we end up _dopwd = 1 { ~ $1 /* } && _dopwd = 0 # absolute path builtin cd $1 && { _oldcwd=$_cwd _cwd=$1 { ~ $_dopwd 1 } && _cwd=`/bin/pwd } _dopwd=() } } else if (~ $#* 2) { _t=`{ echo $_cwd | sed 's<'$1'<'$2'<' } builtin cd $_t && { _oldcwd=$_cwd _cwd=$_t echo $_cwd } _t=() } else { echo cd: takes 0, 1, or 2 arguments >[1=2] builtin cd $1 && { _oldcwd=$_cwd ; _cwd=`/bin/pwd ; echo $_cwd } } } fn pwd { echo $_cwd } From vlsi.cs.caltech.edu!drazen Tue Jan 21 16:03:14 1992 # A kill builtin. #ifdef B_KILL #include static void b_kill(char **av) { int signal = SIGTERM; int n = 1; pid_t pid; boolean res; if (!av[1]) { set(TRUE); return; } #undef STRCMP #define STRCMP strcmp if ( '-' == av[1][0]) { char *p = 1+av[1]; if (0 == strcmp(av[1], "-l")){ int r; const int nsig = NUMOFSIGNALS; const int C = 4, R = 1 + (int)((nsig-2)/C); for (r=1; r<=R; r++){ int j; for (j=r; j; Thu, 2 Apr 1992 02:50:56 -0600 Received: by thor.acc.stolaf.edu; Thu, 2 Apr 92 02:49:31 -0600 Date: Thu, 2 Apr 1992 02:49:31 -0600 From: quanstro@acc.stolaf.edu Message-Id: <9204020849.AA26566@thor.acc.stolaf.edu> To: byron@archone.tamu.edu Subject: EXAMPLES in 1.4beta Status: RO I have a little bit of code which might be a little more general than the souped-up version that is already there. Here it is, if you are interested. # directory functions ################################################### fn pwd { echo $PWD; } fn pushd { dirs = ($PWD $dirs); builtin cd $*; PWD = `{builtin pwd}; } fn popd { switch ($#*) { case 0 ; case 1 echo 'popd: argument '^$1^' ignored.' >[1=2]; case * echo 'popd: usage: popd [n].'; } if (! ~ $dirs ()) { builtin cd $dirs(1); PWD = $dirs(1); echo $PWD; * = $dirs; shift dirs = $*; } } fn cd { ~ $* () && * = $home; !~ $#* 1 && echo 'cd: too many arguments' >[1=2] && return 1; if (test -r $* ) { pushd $*; } else { echo cd: $* does not exist. >[1=2] return 1; } } fn back { popd $*; } fn Back { cd $home; PWD = $home; dirs = (); } fn dirs { echo $dirs; } PWD = `{builtin pwd} ; dirs = $PWD # kickstart From acc.stolaf.edu!quanstro Thu Apr 2 02:53:40 1992 Received: from thor.acc.stolaf.edu ([130.71.192.1]) by archone.tamu.edu with SMTP id <45339>; Thu, 2 Apr 1992 02:53:38 -0600 Received: by thor.acc.stolaf.edu; Thu, 2 Apr 92 02:51:46 -0600 Date: Thu, 2 Apr 1992 02:51:46 -0600 From: quanstro@acc.stolaf.edu Message-Id: <9204020851.AA26573@thor.acc.stolaf.edu> To: byron@archone.tamu.edu Subject: EXAMPLES Status: RO Little yp hack which act's like ~ w/o syntatic sugar (for those who do not have the luxury of seting up symbolic links to all user's homes # user function ######################################################### fn u user { info = () info = `` (':') {ypmatch $1 passwd >[2] /dev/null } if (~ $info ()) { echo user $1 unknown >[1=2]; return 1; } else { echo $info(6) if (~ $0 user) cd $info(6) } } From stolaf.edu!quanstro Sun Apr 5 04:53:34 1992 Date: Sun, 5 Apr 1992 04:53:08 -0500 From: quanstro@stolaf.edu (Erik Quanstrom) To: byron@archone.tamu.edu Subject: man written in rc Status: RO I whipped this up because the NeXTs here insist on using MANPAGER instead of PAGER and otherwise being obnoxious . . . Anyway ... I hope you approve #!/bin/rc ######################################################################### # file: man # # # # object: display man pages # # # # bugs: * slow # # * does not know about fmt files # # # # Erik Quanstrom # # 11. Februar 1992 # ######################################################################### PATH=/bin:/usr/bin:/usr/ucb:/usr/local/bin:$PATH ; TROFF = (nroff -hq -Tcrt); macros=an; sections=(cat1 cat2 cat3 cat4 cat5 cat6 cat7 cat8 catl man1 man2 man3 man4 \ man5 man6 man7 man8 manl) $nl=' ' fn sigint sighup sigquit sigalrm sigterm { rm -f $Bat; exit 2;} fn usage { echo usage: $0 [-] [-t] [-M path] [-T macros] [[section] title] ...>[1=2]; exit 1; } n=(); fn shiftn { n=($n 1) } ~ $PAGER () && test -t 1 && PAGER=more; #default pager while (~ $1 -*) { switch ($1) { case - if (~ $PAGER troff) echo bad combination of flags >[1=2] && usage; PAGER=cat; case -t ~ TROFF () && TROFF = (troff -t); ~ TCAT () && PAGER=(lpr -t); case -M shift; ~ $1 () && usage; MANPATH=$1; case -T shift; ~ $1 () && usage; macros=$1; case -k fflag=(); kflag=1; shift; break; case -f # locate related too filenames kflag=(); fflag=1; shift; break; case -* echo bad flag '`'^$1^'''' >[1=2]; usage; } shift; } if (!~ $#* 1) { ~ $1 [l1-8] && { sname=$1 ; sections=(cat man)^$1 ; shift } #hack for sun-style man pages ~ $1 [l1-8]? && { sname=$1 ; sections=(cat man)^`{echo $1| cut -c1} ; shift } } if (~ 1 $fflag $kflag) { dirlist=(); for (d in ``(:$nl) {echo $MANPATH}) test -s $d^/whatis && dirlist=($dirlist $d^/whatis); ~ $1 () && usage; if (~ $fflag 1) { while (!~ $1 ()) { cmd=`{echo $1 | sed 's/^.*\///g'} egrep -h '^'^$cmd' ' $dirlist; shift; } } else { while (!~ $1 ()) { grep -h $1 $dirlist; shift; } } exit 0; } s=0; while (!~ $1 ()) { for (dir in ``(:$nl) {echo $MANPATH}) { filelist=($filelist `{echo $dir/^$sections^/$1^.* |\ tr ' ' '\12' | grep -v '*'}) # coment this out if you don't care about speed, but # would rather find all the pages. ~ $filelist () || break; } if (~ $filelist ()) { if (~ $#sections 2) { echo no entry for $1 in section '`'$sname'''' of the manual >[1=2]; } else { echo no entry for '`'$1'''' found. >[1=2]; } s=1; } else { echo $filelist '(' $#filelist ')' >[1=2]; for (file in $filelist) { if (~ $file */cat[1-8l]/*) { Cat = ($Cat $file); } else { # search for dups dont=() for (x in $Cat) { if (~ `{echo $x | sed 's/\/[mc]a[nt][1-8l]//'} \ `{echo $file | sed 's/\/[mc]a[nt][1-8l]//'}) { dont=1; break; } } if (~ $dont ()) { cd `{echo $file | sed 's/man[1-8].*//'} echo -n Formatting ... $TROFF -m^$macros $file > /tmp/man^$pid^$#n && \ Bat = ($Bat /tmp/man^$pid^$#n) shiftn; echo ' 'done. } } } } shift; } { !~ () $Cat || !~ () $Bat } && $PAGER $Cat $Bat; rm -f $Bat; ~ $s () || exit $s; exit 0; From osf.org!rsalz Thu Apr 23 16:22:32 1992 Date: Thu, 23 Apr 1992 16:22:07 -0500 From: rsalz@osf.org To: byron@archone.tamu.edu Subject: One for your EXAMPLES file Status: RO Use trimhist [-#lines] trims your history file back; useful for folks with disk quota's :-) fn trimhist { p1=-100 { cp $history $history^'~' ~ $#* 1 && p1=$1 tail $p1 <$history^'~' >$history rm $history^'~' } } From Pa.dec.com!uucp Mon Apr 27 12:25:02 1992 Date: Mon, 27 Apr 1992 12:15:18 -0500 From: haahr@adobe.com To: Byron Rakitzis Subject: a neat little rc script what you have to know to understand this: $md for me is usually obj.$machine my mkfiles build *.o, *.a, and the a.outs in $md this is my acc script, which i use for compiling adobe routines --- #! /user/haahr/bin/next/rc cc = cc proto = '-DPROTOTYPES=1' switch ($md) { case noproto.$machine; proto = '-DPROTOTYPES=0' case gprof.$machine; cc = ($cc -pg) case prof.$machine; cc = ($cc -p) case lcomp.$machine; cc = lcomp } exec $cc $proto '-DPACKAGE_SPECS="package.h"' '-DISP=isp_mc68020' '-DOS=os_mach' $* From rc-owner Tue May 12 14:54:10 1992 Received: from postman.osf.org ([130.105.1.152]) by archone.tamu.edu with SMTP id <45337>; Tue, 12 May 1992 14:38:16 -0500 Received: from earth.osf.org by postman.osf.org (5.64+/OSF 1.0) id AA14480; Tue, 12 May 92 13:25:03 -0400 Received: by earth.osf.org (5.64/4.7) id AA03499; Tue, 12 May 92 13:25:02 -0400 Date: Tue, 12 May 1992 12:25:02 -0500 From: rsalz@osf.org Message-Id: <9205121725.AA03499@earth.osf.org> To: rc@archone.tamu.edu Subject: Useful function Status: R It looks like line noise, but it turns things like /home/rsalz/foo/bar into ~/foo/bar Useful for when you put your current directory up in your icon title. By duplicating the $home section you can make things like /project/dce/build/dce1.0.1/src/rpc become $MYBT/src/rpc ## If a pathname starts with $home, turn $home into ~. Uses all built-ins. fn tildepath { p1=() i=() { p1=$1 switch ($p1) { case $home $home/* # Split arg into components *=`` (/) { echo -n $p1 } # Shift down by number of components in $home for (i in `` (/) { echo -n $home } ) shift # Glue back together p1='~' for (i) p1=$p1 ^ '/' ^ $i echo $p1 case * echo $p1 } return 0 } } From osf.org!rsalz Tue May 12 15:47:12 1992 Received: from postman.osf.org ([130.105.1.152]) by archone.tamu.edu with SMTP id <45316>; Tue, 12 May 1992 15:47:06 -0500 Received: from earth.osf.org by postman.osf.org (5.64+/OSF 1.0) id AA21070; Tue, 12 May 92 16:46:58 -0400 Received: by earth.osf.org (5.64/4.7) id AA09396; Tue, 12 May 92 16:46:56 -0400 Date: Tue, 12 May 1992 15:46:56 -0500 From: rsalz@osf.org Message-Id: <9205122046.AA09396@earth.osf.org> To: byron@archone.tamu.edu Subject: Re: Useful function Status: R >wow. thanks, i'll add it to EXAMPLES. Glad you like. Getting something added to EXAMPLES has been a goal of mine... I've been thinking, a bit, about a more general way of doing it. I want a "prefix-sub" function, like this prefix $some_path var1 var2 var3 var4 var5 That would take some_path and replace any leading $var1 (etc) values with the variable name. Return on the first match. Hmm -- come to think of it, that's very easy to do: # Use pathprefix filename var1 var2 var3 # returns filename, with leading prefixes (in $var1...) turned into the # string $var1... fn pathprefix { p1=() i=() j=() { p1=$1 ; shift for (i) { ~ $p1 $$i $$i^/* && { *=`` (/) { echo -n $p1 } for (j in `` (/) { echo -n $$i } ) shift p1='$'^$i for (j) p1=$p1 ^ '/' ^ $j echo $p1 return 0 } } echo $p1 return 0 } } home=/user/users/rsalz z=/usr/users pathprefix /usr/users/rsalz home usr # --> $home pathprefix /usr/users/rsalz z # --> $z/rsalz pathprefix /usr/users/rsalz/foo z home # --> $z/rsalz/foo pathprefix /usr/users/rsalz/foo home # --> $home/foo rc-1.7.4/heredoc.c0000644000175000017500000000654512507445074010647 00000000000000/* heredoc.c: heredoc slurping is done here */ #include "rc.h" #include "input.h" struct Hq { Node *doc; char *name; Hq *n; bool quoted; } *hq; static bool dead = FALSE; /* * read in a heredocument. A clever trick: skip over any partially matched end-of-file * marker storing only the number of characters matched. If the whole marker is matched, * return from readheredoc(). If only part of the marker is matched, copy that part into * the heredocument. * * BUG: if the eof string contains a newline, the state can get confused, and the * heredoc may continue past where it should. on the other hand, /bin/sh seems to * never get out of its readheredoc() when the heredoc string contains a newline */ static char *readheredoc(char *eof) { int c; char *t, *buf, *bufend; unsigned char *s; size_t bufsize; t = buf = nalloc(bufsize = 512); bufend = &buf[bufsize]; dead = FALSE; #define RESIZE(extra) { \ char *nbuf; \ bufsize = bufsize * 2 + extra; \ nbuf = nalloc(bufsize); \ memcpy(nbuf, buf, (size_t) (t - buf)); \ t = nbuf + (t - buf); \ buf = nbuf; \ bufend = &buf[bufsize]; \ } for (;;) { nextline(); for (s = (unsigned char *) eof; (c = gchar()) == *s; s++) ; if (*s == '\0' && (c == '\n' || c == EOF)) { *t++ = '\0'; return buf; } if (s != (unsigned char *) eof) { size_t len = s - (unsigned char *) eof; if (t + len >= bufend) RESIZE(len); memcpy(t, eof, len); t += len; } for (;; c = gchar()) { if (c == EOF) { yyerror("heredoc incomplete"); dead = TRUE; return NULL; } if (t + 1 >= bufend) RESIZE(0); *t++ = c; if (c == '\n') break; } } } /* parseheredoc -- turn a heredoc with variable references into a node chain */ static Node *parseheredoc(char *s) { int c = *s; Node *result = NULL; while (TRUE) { Node *node; switch (c) { default: { char *begin = s; while ((c = *s++) != '\0' && c != '$') ; *--s = '\0'; node = mk(nWord, begin, NULL); break; } case '$': { char *begin = ++s, *var; c = *s++; if (c == '$') { node = mk(nWord, "$", NULL); c = *s; } else { size_t len = 0; do len++; while (!dnw[c = *(unsigned char *) s++]); if (c == '^') c = *s; else s--; var = nalloc(len + 1); var[len] = '\0'; memcpy(var, begin, len); node = mk(nFlat, mk(nWord, var, NULL)); } break; } case '\0': return result; } result = (result == NULL) ? node : mk(nConcat, result, node); } } /* read in heredocs when yyparse hits a newline. called from yyparse */ extern int heredoc(int end) { Hq *here; if ((here = hq) != NULL) { hq = NULL; if (end) { yyerror("heredoc incomplete"); return FALSE; } do { Node *n = here->doc; char *s = readheredoc(here->name); if (dead) return FALSE; n->u[2].p = here->quoted ? mk(nWord, s, NULL, FALSE) : parseheredoc(s); n->u[0].i = rHerestring; } while ((here = here->n) != NULL); } return TRUE; } /* queue pending heredocs into a queue. called from yyparse */ extern int qdoc(Node *name, Node *n) { Hq *new, **prev; if (name->type != nWord) { yyerror("eof-marker not a single literal word"); skiptonl(); return FALSE; } for (prev = &hq; (new = *prev) != NULL; prev = &new->n) ; *prev = new = nnew(Hq); new->name = name->u[0].s; new->quoted = name->u[2].i; new->doc = n; new->n = NULL; return TRUE; } rc-1.7.4/Makefile.in0000644000175000017500000010203312524740572011124 00000000000000# Makefile.in generated by automake 1.14.1 from Makefile.am. # @configure_input@ # Copyright (C) 1994-2013 Free Software Foundation, Inc. # This Makefile.in is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY, to the extent permitted by law; without # even the implied warranty of MERCHANTABILITY or FITNESS FOR A # PARTICULAR PURPOSE. @SET_MAKE@ VPATH = @srcdir@ am__is_gnu_make = test -n '$(MAKEFILE_LIST)' && test -n '$(MAKELEVEL)' am__make_running_with_option = \ case $${target_option-} in \ ?) ;; \ *) echo "am__make_running_with_option: internal error: invalid" \ "target option '$${target_option-}' specified" >&2; \ exit 1;; \ esac; \ has_opt=no; \ sane_makeflags=$$MAKEFLAGS; \ if $(am__is_gnu_make); then \ sane_makeflags=$$MFLAGS; \ else \ case $$MAKEFLAGS in \ *\\[\ \ ]*) \ bs=\\; \ sane_makeflags=`printf '%s\n' "$$MAKEFLAGS" \ | sed "s/$$bs$$bs[$$bs $$bs ]*//g"`;; \ esac; \ fi; \ skip_next=no; \ strip_trailopt () \ { \ flg=`printf '%s\n' "$$flg" | sed "s/$$1.*$$//"`; \ }; \ for flg in $$sane_makeflags; do \ test $$skip_next = yes && { skip_next=no; continue; }; \ case $$flg in \ *=*|--*) continue;; \ -*I) strip_trailopt 'I'; skip_next=yes;; \ -*I?*) strip_trailopt 'I';; \ -*O) strip_trailopt 'O'; skip_next=yes;; \ -*O?*) strip_trailopt 'O';; \ -*l) strip_trailopt 'l'; skip_next=yes;; \ -*l?*) strip_trailopt 'l';; \ -[dEDm]) skip_next=yes;; \ -[JT]) skip_next=yes;; \ esac; \ case $$flg in \ *$$target_option*) has_opt=yes; break;; \ esac; \ done; \ test $$has_opt = yes am__make_dryrun = (target_option=n; $(am__make_running_with_option)) am__make_keepgoing = (target_option=k; $(am__make_running_with_option)) pkgdatadir = $(datadir)/@PACKAGE@ pkgincludedir = $(includedir)/@PACKAGE@ pkglibdir = $(libdir)/@PACKAGE@ pkglibexecdir = $(libexecdir)/@PACKAGE@ am__cd = CDPATH="$${ZSH_VERSION+.}$(PATH_SEPARATOR)" && cd install_sh_DATA = $(install_sh) -c -m 644 install_sh_PROGRAM = $(install_sh) -c install_sh_SCRIPT = $(install_sh) -c INSTALL_HEADER = $(INSTALL_DATA) transform = $(program_transform_name) NORMAL_INSTALL = : PRE_INSTALL = : POST_INSTALL = : NORMAL_UNINSTALL = : PRE_UNINSTALL = : POST_UNINSTALL = : bin_PROGRAMS = rc$(EXEEXT) noinst_PROGRAMS = mksignal$(EXEEXT) mkstatval$(EXEEXT) \ tripping$(EXEEXT) $(am__EXEEXT_1) subdir = . 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*/ if (*argv != NULL) starassign(dollarzero, argv, FALSE); if (dashess) pushfd(0); else pushstring(dashsee, TRUE); } else if (*argv != NULL) { /* else from a file? */ b_dot(--argv); rc_exit(getstatus()); } else { /* else stdin */ pushfd(0); } dasheye = FALSE; doit(TRUE); rc_exit(getstatus()); return 0; /* Never really reached. */ } static void assigndefault(char *name,...) { va_list ap; List *l; char *v; va_start(ap, name); for (l = NULL; (v = va_arg(ap, char *)) != NULL;) l = append(l, word(v, NULL)); varassign(name, l, FALSE); set_exportable(name, FALSE); if (streq(name, "path")) alias(name, l, FALSE); va_end(ap); } /* open an fd on /dev/null if it is inherited closed */ static void checkfd(int fd, enum redirtype r) { int new = rc_open("/dev/null", r); if (new != fd && new != -1) close(new); } rc-1.7.4/input.c0000644000175000017500000001567712515531750010377 00000000000000/* input.c: i/o routines for files and pseudo-files (strings) */ #include "rc.h" #include #include "edit.h" #include "input.h" #include "jbwrap.h" /* How many characters can we unget? */ enum { UNGETSIZE = 2 }; typedef enum inputtype { iFd, iString, iEdit } inputtype; typedef struct Input { bool saved; inputtype t; int fd, index, read, ungetcount, lineno, last; char *ibuf; void *cookie; int ungetbuf[UNGETSIZE]; int (*gchar)(void); } Input; #define BUFSIZE ((size_t) 256) static char *inbuf; static size_t istacksize, chars_out, chars_in; static bool save_lineno = TRUE; static Input *istack, *itop; int lastchar; static char *prompt, *prompt2; extern void ugchar(int c) { assert(istack->ungetcount < UNGETSIZE); istack->ungetbuf[istack->ungetcount++] = c; } extern int gchar() { int c; if (istack->ungetcount) return lastchar = istack->ungetbuf[--istack->ungetcount]; while ((c = (*istack->gchar)()) == '\0') pr_error("warning: null character ignored", 0); return c; } /* get the next character from a string. */ static int stringgchar() { return lastchar = (inbuf[chars_out] == '\0' ? EOF : inbuf[chars_out++]); } /* write last command out to a file if interactive && $history is set */ static void history() { List *hist; size_t a; if (!interactive || (hist = varlookup("history")) == NULL) return; for (a = 0; a < chars_in; a++) { char c = inbuf[a]; /* skip empty lines and comments */ if (c == '#' || c == '\n') break; /* line matches [ \t]*[^#\n] so it's ok to write out */ if (c != ' ' && c != '\t') { char *name = hist->w; int fd = rc_open(name, rAppend); if (fd < 0) uerror(name); else { writeall(fd, inbuf, chars_in); close(fd); } break; } } } /* read a character from a file descriptor */ static int fdgchar() { if (chars_out >= chars_in) { /* replenish empty buffer */ ssize_t r; do { r = rc_read(istack->fd, inbuf, BUFSIZE); sigchk(); if (r == -1) switch (errno) { case EAGAIN: if (!makeblocking(istack->fd)) panic("not O_NONBLOCK"); errno = EINTR; break; case EIO: if (makesamepgrp(istack->fd)) errno = EINTR; else errno = EIO; break; } } while (r < 0 && errno == EINTR); if (r < 0) { uerror("read"); rc_raise(eError); } chars_in = (size_t) r; if (chars_in == 0) return lastchar = EOF; chars_out = 0; if (dashvee) writeall(2, inbuf, chars_in); history(); } return lastchar = inbuf[chars_out++]; } /* read a character from a line-editing file descriptor */ static int editgchar() { if (chars_out >= chars_in) { /* replenish empty buffer */ edit_free(istack->cookie); inbuf = edit_alloc(istack->cookie, &chars_in); if (inbuf == NULL) { chars_in = 0; fprint(2, "exit\n"); return lastchar = EOF; } chars_out = 0; if (dashvee) writeall(2, inbuf, chars_in); history(); } return lastchar = inbuf[chars_out++]; } void termchange(void) { if (istack->t == iEdit) edit_reset(istack->cookie); } /* set up the input stack, and put a "dead" input at the bottom, so that yyparse will always read eof */ extern void initinput() { istack = itop = ealloc(istacksize = 256 * sizeof (Input)); istack->ungetcount = 0; ugchar(EOF); } /* push an input source onto the stack. set up a new input buffer, and set gchar() */ static void pushcommon() { size_t idiff; istack->index = chars_out; istack->read = chars_in; istack->ibuf = inbuf; istack->lineno = lineno; istack->saved = save_lineno; istack->last = lastchar; istack++; idiff = istack - itop; if (idiff >= istacksize / sizeof (Input)) { itop = erealloc(itop, istacksize *= 2); istack = itop + idiff; } chars_out = 0; chars_in = 0; istack->ungetcount = 0; } extern void pushfd(int fd) { pushcommon(); save_lineno = TRUE; istack->fd = fd; lineno = 1; if (editing && interactive && isatty(fd)) { istack->t = iEdit; istack->gchar = editgchar; istack->cookie = edit_begin(fd); } else { istack->t = iFd; istack->gchar = fdgchar; inbuf = ealloc(BUFSIZE); } } extern void pushstring(char **a, bool save) { pushcommon(); istack->t = iString; save_lineno = save; inbuf = mprint("%A", a); istack->gchar = stringgchar; if (save_lineno) lineno = 1; else --lineno; } /* remove an input source from the stack. restore associated variables etc. */ extern void popinput() { if (istack->t == iEdit) edit_end(istack->cookie); if (istack->t == iFd || istack->t == iEdit) close(istack->fd); efree(inbuf); --istack; lastchar = istack->last; inbuf = istack->ibuf; chars_out = istack->index; chars_in = istack->read; if (save_lineno) lineno = istack->lineno; else lineno++; save_lineno = istack->saved; } /* flush input characters up to newline. Used by scanerror() */ extern void skiptonl() { int c; if (lastchar == '\n' || lastchar == EOF) return; while ((c = gchar()) != '\n' && c != EOF) ; /* skip to newline */ if (c == EOF) ugchar(c); } /* the wrapper loop in rc: prompt for commands until EOF, calling yyparse and walk() */ extern Node *doit(bool clobberexecit) { bool eof; bool execit; Jbwrap j; Estack e1; Edata jerror; if (dashen) clobberexecit = FALSE; execit = clobberexecit; sigsetjmp(j.j, 1); jerror.jb = &j; except(eError, jerror, &e1); for (eof = FALSE; !eof;) { Edata block; Estack e2; block.b = newblock(); except(eArena, block, &e2); sigchk(); if (interactive) { List *s; if (!dashen && fnlookup("prompt") != NULL) { static bool died = FALSE; static char *arglist[] = { "prompt", NULL }; if (!died) { died = TRUE; funcall(arglist); } died = FALSE; } s = varlookup("prompt"); if (s != NULL) { prompt = s->w; if (s->n != NULL) prompt2 = s->n->w; else prompt2 = ""; } else { prompt = prompt2 = ""; } if (istack->t == iFd) fprint(2, "%s", prompt); else if (istack->t == iEdit) edit_prompt(istack->cookie, prompt); } inityy(); if (yyparse() == 1 && execit) rc_raise(eError); eof = (lastchar == EOF); /* "lastchar" can be clobbered during a walk() */ if (parsetree != NULL) { if (execit) walk(parsetree, TRUE); else if (dashex && dashen) fprint(2, "%T\n", parsetree); } unexcept(); /* eArena */ } popinput(); unexcept(); /* eError */ return parsetree; } /* parse a function imported from the environment */ extern Node *parseline(char *extdef) { bool i = interactive; char *in[2]; Node *fun; in[0] = extdef; in[1] = NULL; interactive = FALSE; pushstring(in, TRUE); fun = doit(FALSE); interactive = i; return fun; } /* close file descriptors after a fork() */ extern void closefds() { Input *i; for (i = istack; i != itop; --i) /* close open scripts */ if (i->t == iFd && i->fd > 2) { close(i->fd); i->fd = -1; } } /* print (or set) prompt(2) */ extern void nextline() { lineno++; if (interactive) { if (istack->t == iFd) fprint(2, "%s", prompt2); else if (istack->t == iEdit) edit_prompt(istack->cookie, prompt2); } } rc-1.7.4/install-sh0000755000175000017500000003325512515531750011070 00000000000000#!/bin/sh # install - install a program, script, or datafile scriptversion=2011-11-20.07; # UTC # This originates from X11R5 (mit/util/scripts/install.sh), which was # later released in X11R6 (xc/config/util/install.sh) with the # following copyright and license. # # Copyright (C) 1994 X Consortium # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to # deal in the Software without restriction, including without limitation the # rights to use, copy, modify, merge, publish, distribute, sublicense, and/or # sell copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN # AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC- # TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # # Except as contained in this notice, the name of the X Consortium shall not # be used in advertising or otherwise to promote the sale, use or other deal- # ings in this Software without prior written authorization from the X Consor- # tium. # # # FSF changes to this file are in the public domain. # # Calling this script install-sh is preferred over install.sh, to prevent # 'make' implicit rules from creating a file called install from it # when there is no Makefile. # # This script is compatible with the BSD install script, but was written # from scratch. nl=' ' IFS=" "" $nl" # set DOITPROG to echo to test this script # Don't use :- since 4.3BSD and earlier shells don't like it. doit=${DOITPROG-} if test -z "$doit"; then doit_exec=exec else doit_exec=$doit fi # Put in absolute file names if you don't have them in your path; # or use environment vars. chgrpprog=${CHGRPPROG-chgrp} chmodprog=${CHMODPROG-chmod} chownprog=${CHOWNPROG-chown} cmpprog=${CMPPROG-cmp} cpprog=${CPPROG-cp} mkdirprog=${MKDIRPROG-mkdir} mvprog=${MVPROG-mv} rmprog=${RMPROG-rm} stripprog=${STRIPPROG-strip} posix_glob='?' initialize_posix_glob=' test "$posix_glob" != "?" || { if (set -f) 2>/dev/null; then posix_glob= else posix_glob=: fi } ' posix_mkdir= # Desired mode of installed file. mode=0755 chgrpcmd= chmodcmd=$chmodprog chowncmd= mvcmd=$mvprog rmcmd="$rmprog -f" stripcmd= src= dst= dir_arg= dst_arg= copy_on_change=false no_target_directory= usage="\ Usage: $0 [OPTION]... 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See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under # the same distribution terms that you use for the rest of that program. # This file is maintained in Automake, please report # bugs to or send patches to # . nl=' ' # We need space, tab and new line, in precisely that order. Quoting is # there to prevent tools from complaining about whitespace usage. IFS=" "" $nl" file_conv= # func_file_conv build_file lazy # Convert a $build file to $host form and store it in $file # Currently only supports Windows hosts. If the determined conversion # type is listed in (the comma separated) LAZY, no conversion will # take place. func_file_conv () { file=$1 case $file in / | /[!/]*) # absolute file, and not a UNC file if test -z "$file_conv"; then # lazily determine how to convert abs files case `uname -s` in MINGW*) file_conv=mingw ;; CYGWIN*) file_conv=cygwin ;; *) file_conv=wine ;; esac fi case $file_conv/,$2, in *,$file_conv,*) ;; mingw/*) file=`cmd //C echo "$file " | sed -e 's/"\(.*\) " *$/\1/'` ;; cygwin/*) file=`cygpath -m "$file" || echo "$file"` ;; wine/*) file=`winepath -w "$file" || echo "$file"` ;; esac ;; esac } # func_cl_dashL linkdir # Make cl look for libraries in LINKDIR func_cl_dashL () { func_file_conv "$1" if test -z "$lib_path"; then lib_path=$file else lib_path="$lib_path;$file" fi linker_opts="$linker_opts -LIBPATH:$file" } # func_cl_dashl library # Do a library search-path lookup for cl func_cl_dashl () { lib=$1 found=no save_IFS=$IFS IFS=';' for dir in $lib_path $LIB do IFS=$save_IFS if $shared && test -f "$dir/$lib.dll.lib"; then found=yes lib=$dir/$lib.dll.lib break fi if test -f "$dir/$lib.lib"; then found=yes lib=$dir/$lib.lib break fi if test -f "$dir/lib$lib.a"; then found=yes lib=$dir/lib$lib.a break fi done IFS=$save_IFS if test "$found" != yes; then lib=$lib.lib fi } # func_cl_wrapper cl arg... # Adjust compile command to suit cl func_cl_wrapper () { # Assume a capable shell lib_path= shared=: linker_opts= for arg do if test -n "$eat"; then eat= else case $1 in -o) # configure might choose to run compile as 'compile cc -o foo foo.c'. eat=1 case $2 in *.o | *.[oO][bB][jJ]) func_file_conv "$2" set x "$@" -Fo"$file" shift ;; *) func_file_conv "$2" set x "$@" -Fe"$file" shift ;; esac ;; -I) eat=1 func_file_conv "$2" mingw set x "$@" -I"$file" shift ;; -I*) func_file_conv "${1#-I}" mingw set x "$@" -I"$file" shift ;; -l) eat=1 func_cl_dashl "$2" set x "$@" "$lib" shift ;; -l*) func_cl_dashl "${1#-l}" set x "$@" "$lib" shift ;; -L) eat=1 func_cl_dashL "$2" ;; -L*) func_cl_dashL "${1#-L}" ;; -static) shared=false ;; -Wl,*) arg=${1#-Wl,} save_ifs="$IFS"; IFS=',' for flag in $arg; do IFS="$save_ifs" linker_opts="$linker_opts $flag" done IFS="$save_ifs" ;; -Xlinker) eat=1 linker_opts="$linker_opts $2" ;; -*) set x "$@" "$1" shift ;; *.cc | *.CC | *.cxx | *.CXX | *.[cC]++) func_file_conv "$1" set x "$@" -Tp"$file" shift ;; *.c | *.cpp | *.CPP | *.lib | *.LIB | *.Lib | *.OBJ | *.obj | *.[oO]) func_file_conv "$1" mingw set x "$@" "$file" shift ;; *) set x "$@" "$1" shift ;; esac fi shift done if test -n "$linker_opts"; then linker_opts="-link$linker_opts" fi exec "$@" $linker_opts exit 1 } eat= case $1 in '') echo "$0: No command. Try '$0 --help' for more information." 1>&2 exit 1; ;; -h | --h*) cat <<\EOF Usage: compile [--help] [--version] PROGRAM [ARGS] Wrapper for compilers which do not understand '-c -o'. Remove '-o dest.o' from ARGS, run PROGRAM with the remaining arguments, and rename the output as expected. If you are trying to build a whole package this is not the right script to run: please start by reading the file 'INSTALL'. Report bugs to . EOF exit $? ;; -v | --v*) echo "compile $scriptversion" exit $? ;; cl | *[/\\]cl | cl.exe | *[/\\]cl.exe ) func_cl_wrapper "$@" # Doesn't return... ;; esac ofile= cfile= for arg do if test -n "$eat"; then eat= else case $1 in -o) # configure might choose to run compile as 'compile cc -o foo foo.c'. # So we strip '-o arg' only if arg is an object. eat=1 case $2 in *.o | *.obj) ofile=$2 ;; *) set x "$@" -o "$2" shift ;; esac ;; *.c) cfile=$1 set x "$@" "$1" shift ;; *) set x "$@" "$1" shift ;; esac fi shift done if test -z "$ofile" || test -z "$cfile"; then # If no '-o' option was seen then we might have been invoked from a # pattern rule where we don't need one. That is ok -- this is a # normal compilation that the losing compiler can handle. If no # '.c' file was seen then we are probably linking. That is also # ok. exec "$@" fi # Name of file we expect compiler to create. cofile=`echo "$cfile" | sed 's|^.*[\\/]||; s|^[a-zA-Z]:||; s/\.c$/.o/'` # Create the lock directory. # Note: use '[/\\:.-]' here to ensure that we don't use the same name # that we are using for the .o file. Also, base the name on the expected # object file name, since that is what matters with a parallel build. lockdir=`echo "$cofile" | sed -e 's|[/\\:.-]|_|g'`.d while true; do if mkdir "$lockdir" >/dev/null 2>&1; then break fi sleep 1 done # FIXME: race condition here if user kills between mkdir and trap. trap "rmdir '$lockdir'; exit 1" 1 2 15 # Run the compile. "$@" ret=$? if test -f "$cofile"; then test "$cofile" = "$ofile" || mv "$cofile" "$ofile" elif test -f "${cofile}bj"; then test "${cofile}bj" = "$ofile" || mv "${cofile}bj" "$ofile" fi rmdir "$lockdir" exit $ret # Local Variables: # mode: shell-script # sh-indentation: 2 # eval: (add-hook 'write-file-hooks 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-time-zone: "UTC" # time-stamp-end: "; # UTC" # End: rc-1.7.4/system.c0000644000175000017500000000035512507445074010553 00000000000000#include "rc.h" extern void writeall(int fd, char *buf, size_t remain) { int i; for (i = 0; remain > 0; buf += i, remain -= i) if ((i = write(fd, buf, remain)) <= 0) break; /* abort silently on errors in write() */ sigchk(); } rc-1.7.4/input.h0000644000175000017500000000152512507445074010373 00000000000000/* initialize the input stack */ extern void initinput(void); /* push an input onto the stack */ extern void pushfd(int); /* the Boolean argument affects line number reporting */ extern void pushstring(char **, bool); /* pop the stack */ extern void popinput(void); /* get / unget the next character */ extern int gchar(void); extern void ugchar(int); /* $TERM or $TERMCAP has changed */ extern void termchange(void); /* parse a function from the environment */ extern Node *parseline(char *); /* main parsing loop; Boolean says whether to exec also */ extern Node *doit(bool); /* error recovery: skip to the next newline */ extern void skiptonl(void); /* prepare for next line of input */ extern void nextline(void); /* close all file descriptors on the stack */ extern void closefds(void); /* the last character read */ extern int lastchar; rc-1.7.4/jbwrap.h0000644000175000017500000000124312507445074010516 00000000000000#include /* If we have POSIX sigjmp_buf and friends, use them. If we don't, just use a jmp_buf. This probably fails on a traditional SysV machine, where jmp_bufs don't preserve signal masks. I'm not worrying about this till someone reports it as a bug :-). */ #if HAVE_SIGSETJMP #else #define sigjmp_buf jmp_buf #define sigsetjmp(x,y) setjmp(x) #define siglongjmp longjmp #endif /* HAVE_SIGSETJMP */ /* Certain braindamaged environments don't define jmp_buf as an array, so wrap it in a structure. Potentially, we could use configure to do this only where it needs to be done, but the effort is probably not worth it. */ struct Jbwrap { sigjmp_buf j; }; rc-1.7.4/glob.c0000644000175000017500000001460712515531750010153 00000000000000/* glob.c: rc's (ugly) globber. This code is not elegant, but it works */ #include "rc.h" #include "stat.h" /* Lifted from autoconf documentation.*/ #if HAVE_DIRENT_H # include # define NAMLEN(dirent) strlen((dirent)->d_name) #else # define dirent direct # define NAMLEN(dirent) (dirent)->d_namlen # if HAVE_SYS_NDIR_H # include # endif # if HAVE_SYS_DIR_H # include # endif # if HAVE_NDIR_H # include # endif #endif static List *dmatch(char *, char *, char *); static List *doglob(char *, char *); static List *lglob(List *, char *, char *, size_t); static List *sort(List *); /* Matches a list of words s against a list of patterns p. Returns true iff a pattern in p matches a word in s. () matches (), but otherwise null patterns match nothing. */ extern bool lmatch(List *s, List *p) { List *q; if (s == NULL) { if (p == NULL) /* null matches null */ return TRUE; for (; p != NULL; p = p->n) /* one or more stars match null */ if (strspn(p->w, "*") == strlen(p->w) && p->m != NULL && strlen(p->m) == strlen(p->w)) return TRUE; return FALSE; } for (; s != NULL; s = s->n) for (q = p; q != NULL; q = q->n) if (match(q->w, q->m, s->w)) return TRUE; return FALSE; } /* Globs a list; checks to see if each element in the list has a metacharacter. If it does, it is globbed, and the output is sorted. */ extern List *glob(List *s) { List *top, *r; bool meta; for (r = s, meta = FALSE; r != NULL; r = r->n) if (r->m != NULL) meta = TRUE; if (!meta) return s; /* don't copy lists with no metacharacters in them */ for (top = r = NULL; s != NULL; s = s->n) { if (s->m == NULL) { /* no metacharacters; just tack on to the return list */ if (top == NULL) top = r = nnew(List); else r = r->n = nnew(List); r->w = s->w; } else { if (top == NULL) top = r = sort(doglob(s->w, s->m)); else r->n = sort(doglob(s->w, s->m)); while (r->n != NULL) r = r->n; } } r->n = NULL; return top; } /* Matches a pattern p against the contents of directory d */ static List *dmatch(char *d, char *p, char *m) { bool matched; List *top, *r; static DIR *dirp; static struct dirent *dp; static struct stat s; int i; /* return a match if there are no metacharacters; allows globbing through directories with no read permission. make sure the file exists, though. */ matched = TRUE; if (m != NULL) for (i = 0; p[i] != '\0'; i++) if (m[i]) { matched = FALSE; break; } if (matched) { char *path = nprint("%s/%s", d, p); if (lstat(path, &s) < 0) return NULL; r = nnew(List); r->w = ncpy(p); r->m = NULL; r->n = NULL; return r; } top = r = NULL; if (*d == '\0') d = "/"; if ((dirp = opendir(d)) == NULL) return NULL; /* opendir succeeds on regular files on some systems, so the stat() call is necessary (sigh) */ if (stat(d, &s) < 0 || (s.st_mode & S_IFMT) != S_IFDIR) { closedir(dirp); return NULL; } while ((dp = readdir(dirp)) != NULL) if ((*dp->d_name != '.' || *p == '.') && match(p, m, dp->d_name)) { /* match ^. explicitly */ matched = TRUE; if (top == NULL) top = r = nnew(List); else r = r->n = nnew(List); r->w = ncpy(dp->d_name); r->m = NULL; } closedir(dirp); if (!matched) return NULL; r->n = NULL; return top; } /* lglob() globs a pattern against a list of directory roots. e.g., (/tmp /usr /bin) "*" will return a list with all the files in /tmp, /usr, and /bin. NULL on no match. slashcount indicates the number of slashes to stick between the directory and the matched name. e.g., for matching ////tmp/////foo* */ static List *lglob(List *s, char *p, char *m, size_t slashcount) { List *q, *r, *top, foo; static struct { List l; size_t size; } slash; if (slashcount+1 > slash.size) { slash.size = 2*(slashcount+1); slash.l.w = erealloc(slash.l.w, slash.size); } slash.l.w[slashcount] = '\0'; while (slashcount > 0) slash.l.w[--slashcount] = '/'; for (top = r = NULL; s != NULL; s = s->n) { q = dmatch(s->w, p, m); if (q != NULL) { foo.w = s->w; foo.m = NULL; foo.n = NULL; if (!(s->w[0] == '/' && s->w[1] == '\0')) /* need to separate */ q = concat(&slash.l, q); /* dir/name with slash */ q = concat(&foo, q); if (r == NULL) top = r = q; else r->n = q; while (r->n != NULL) r = r->n; } } return top; } /* Doglob globs a pathname in pattern form against a unix path. Returns the original pattern (cleaned of metacharacters) on failure, or the globbed string(s). */ static List *doglob(char *w, char *m) { static char *dir = NULL, *pattern = NULL, *metadir = NULL, *metapattern = NULL; static size_t dsize = 0; char *d, *p, *md, *mp; size_t psize; char *s = w; List firstdir; List *matched; if ((psize = strlen(w) + 1) > dsize || dir == NULL) { efree(dir); efree(pattern); efree(metadir); efree(metapattern); dir = ealloc(psize); pattern = ealloc(psize); metadir = ealloc(psize); metapattern = ealloc(psize); dsize = psize; } d = dir; p = pattern; md = metadir; mp = metapattern; while (*s != '/' && *s != '\0') { *d++ = *s++; /* get first directory component */ *md++ = *m++; } *d = '\0'; /* Special case: no slashes in the pattern, i.e., open the current directory. Remember that w cannot consist of slashes alone (the other way *s could be zero) since doglob gets called iff there's a metacharacter to be matched */ if (*s == '\0') { matched = dmatch(".", dir, metadir); goto end; } if (*w == '/') { firstdir.w = dir; firstdir.m = metadir; firstdir.n = NULL; matched = &firstdir; } else { /* we must glob against current directory, since the first character is not a slash. */ matched = dmatch(".", dir, metadir); } do { size_t slashcount; sigchk(); for (slashcount = 0; *s == '/'; s++, m++) slashcount++; /* skip slashes */ while (*s != '/' && *s != '\0') *p++ = *s++, *mp++ = *m++; /* get pattern */ *p = '\0'; matched = lglob(matched, pattern, metapattern, slashcount); p = pattern, mp = metapattern; } while (*s != '\0'); end: if (matched == NULL) { matched = nnew(List); matched->w = w; matched->m = NULL; matched->n = NULL; } return matched; } static List *sort(List *s) { size_t nel = listnel(s); if (nel > 1) { char **a; List *t; qsort(a = list2array(s, FALSE), nel, sizeof(char *), starstrcmp); for (t = s; t != NULL; t = t->n) t->w = *a++; } return s; } rc-1.7.4/edit-edit.c0000644000175000017500000000277512515531750011103 00000000000000#include "rc.h" #include #include #include "edit.h" bool editing = 1; struct cookie { EditLine *el; History *hist; }; static char *prompt; void *edit_begin(int fd) { FILE *f; HistEvent he; struct cookie *c; c = ealloc(sizeof *c); if (fd == 0) f = stdin; else f = fdopen(fd, "r"); c->el = el_init("rc", f, stdout, stderr); el_set(c->el, EL_SIGNAL, 0); el_source(c->el, NULL); c->hist = history_init(); history(c->hist, &he, H_SETSIZE, 20); el_set(c->el, EL_HIST, history, c->hist); return c; } static void edit_catcher(int sig) { write(2, "\n", 1); rc_raise(eError); } char *edit_alloc(void *cookie, size_t *count) { const char *r; HistEvent he; struct cookie *c = cookie; void (*oldint)(int), (*oldquit)(int); oldint = sys_signal(SIGINT, edit_catcher); oldquit = sys_signal(SIGQUIT, edit_catcher); r = el_gets(c->el, count); sys_signal(SIGINT, oldint); sys_signal(SIGQUIT, oldquit); if (r) history(c->hist, &he, H_ENTER, r); return (char *)r; /* cast to avoid gcc warning */ } static char *edit_prompter(EditLine *e) { return prompt; } void edit_prompt(void *cookie, char *pr) { struct cookie *c = cookie; prompt = pr; el_set(c->el, EL_PROMPT, edit_prompter); } void edit_free(void *cookie) { /* this function deliberately left blank */ } void edit_end(void *cookie) { struct cookie *c = cookie; el_end(c->el); history_end(c->hist); efree(c); } void edit_reset(void *cookie) { struct cookie *c = cookie; el_set(c->el, EL_TERMINAL, NULL); } rc-1.7.4/mksignal.c0000644000175000017500000001307712507445074011041 00000000000000#include #include #include #ifdef NSIG #define NUMSIG NSIG #else #define NUMSIG 1 #endif struct signaming { int signo; const char *signame; const char *sigmsg; }; static struct signaming signamings[] = { #ifdef SIGABRT { SIGABRT, "sigabrt", "abort"}, #endif #ifdef SIGALRM { SIGALRM, "sigalrm", "alarm clock"}, #endif #ifdef SIGBREAK { SIGBREAK, "sigbreak", "break"}, #endif #ifdef SIGBUS { SIGBUS, "sigbus", "bus error"}, #endif #ifdef SIGCANCEL { SIGCANCEL, "sigcancel", "thread cancellation"}, #endif #ifdef SIGCHLD { SIGCHLD, "sigchld", "child stop or exit"}, #endif #ifdef SIGCLD { SIGCLD, "sigcld", "child stop or exit"}, #endif #ifdef SIGCONT { SIGCONT, "sigcont", "continue"}, #endif #ifdef SIGDIL { SIGDIL, "sigdil", "dil signal"}, #endif #ifdef SIGEMT { SIGEMT, "sigemt", "emt instruction"}, #endif #ifdef SIGFPE { SIGFPE, "sigfpe", "floating point error"}, #endif #ifdef SIGFREEZE { SIGFREEZE, "sigfreeze", "cpr freeze"}, #endif #ifdef SIGHUP { SIGHUP, "sighup", "hangup"}, #endif #ifdef SIGILL { SIGILL, "sigill", "illegal instruction"}, #endif /* We don't want a default message for SIGINT. */ #ifdef SIGINT { SIGINT, "sigint", ""}, #endif #ifdef SIGIO { SIGIO, "sigio", "socket i/o possible"}, #endif #ifdef SIGIOT { SIGIOT, "sigiot", "iot instruction"}, #endif #ifdef SIGKILL { SIGKILL, "sigkill", "killed"}, #endif #ifdef SIGLOST { SIGLOST, "siglost", "resource lost"}, #endif #ifdef SIGLWP { SIGLWP, "siglwp", "thread library signal"}, #endif /* By default, SIGPIPEs are silent. */ #ifdef SIGPIPE { SIGPIPE, "sigpipe", ""}, #endif #ifdef SIGPOLL { SIGPOLL, "sigpoll", "pollable event occurred"}, #endif #ifdef SIGPROF { SIGPROF, "sigprof", "profiling timer alarm"}, #endif #ifdef SIGPWR { SIGPWR, "sigpwr", "power-fail restart"}, #endif #ifdef SIGQUIT { SIGQUIT, "sigquit", "quit"}, #endif #ifdef SIGSEGV { SIGSEGV, "sigsegv", "segmentation violation"}, #endif #ifdef SIGSTKFLT { SIGSTKFLT, "sigstkflt", "stack fault"}, #endif #ifdef SIGSTOP { SIGSTOP, "sigstop", "stopped by program"}, #endif #ifdef SIGSYS { SIGSYS, "sigsys", "invalid argument to system call"}, #endif #ifdef SIGTERM { SIGTERM, "sigterm", "terminated"}, #endif #ifdef SIGTHAW { SIGTHAW, "sigthaw", "cpr thaw"}, #endif #ifdef SIGTRAP { SIGTRAP, "sigtrap", "trace trap"}, #endif #ifdef SIGTSTP { SIGTSTP, "sigtstp", "stopped"}, #endif #ifdef SIGTTIN { SIGTTIN, "sigttin", "background tty read"}, #endif #ifdef SIGTTOU { SIGTTOU, "sigttou", "background tty write"}, #endif #ifdef SIGURG { SIGURG, "sigurg", "urgent condition on i/o channel"}, #endif #ifdef SIGUSR1 { SIGUSR1, "sigusr1", "user defined signal 1"}, #endif #ifdef SIGUSR2 { SIGUSR2, "sigusr2", "user defined signal 2"}, #endif #ifdef SIGVTALRM { SIGVTALRM, "sigvtalrm", "virtual timer alarm"}, #endif #ifdef SIGWAITING { SIGWAITING, "sigwaiting", "lwps blocked"}, #endif #ifdef SIGWINCH { SIGWINCH, "sigwinch", "window size change"}, #endif #ifdef SIGWINDOW { SIGWINDOW, "sigwindow", "window size change"}, #endif #ifdef SIGXCPU { SIGXCPU, "sigxcpu", "exceeded cpu time limit"}, #endif #ifdef SIGXFSZ { SIGXFSZ, "sigxfsz", "exceeded file size limit"}, #endif #ifdef SIGSAK { SIGSAK, "sigsak", "secure attention key"}, #endif #ifdef SIGSOUND { SIGSOUND, "sigsound", "hft sound sequence completed"}, #endif #ifdef SIGRETRACT { SIGRETRACT, "sigretract", "hft monitor mode retracted"}, #endif #ifdef SIGKAP { SIGKAP, "sigkap", "keep alive poll"}, #endif #ifdef SIGGRANT { SIGGRANT, "siggrant", "hft monitor mode granted"}, #endif #ifdef SIGALRM1 { SIGALRM1, "sigalrm1", "m:n condition alarm"}, #endif #ifdef SIGVIRT { SIGVIRT, "sigvirt", "virtual time alarm"}, #endif #ifdef SIGPRE { SIGPRE, "sigpre", "programming error"}, #endif #ifdef SIGMIGRATE { SIGMIGRATE, "sigmigrate", "migrate process"}, #endif #ifdef SIGDANGER { SIGDANGER, "sigdanger", "system crash imminent"}, #endif #ifdef SIGMSG { SIGMSG, "sigmsg", "hft input data pending"}, #endif #ifdef SIGINFO { SIGINFO, "siginfo", "information request"}, #endif { 0, 0, 0} }; static void barf(const char *msg) { fprintf(stderr, "mksignals: %s\n", msg); exit(1); } int main(void) { int maxsig = NUMSIG-1; int s; struct signaming *snp; FILE *outf; for (snp = signamings; snp->signo; ++snp) if (snp->signo > maxsig) maxsig = snp->signo; outf = fopen("sigmsgs.h", "w"); if (!outf) barf("could not open sigmsgs.h for writing"); fprintf(outf, "typedef struct {\n"); fprintf(outf, "\tchar *name, *msg;\n"); fprintf(outf, "} Sigmsgs;\n"); fprintf(outf, "extern Sigmsgs signals[];\n"); fprintf(outf, "#define NUMOFSIGNALS %d\n", maxsig+1); if (fclose(outf) == EOF) barf("could not fclose sigmsgs.h after writing"); outf = fopen("sigmsgs.c", "w"); if (!outf) barf("could not open sigmsgs.c for writing"); fprintf(outf, "#include \"sigmsgs.h\"\n\n"); fprintf(outf, "Sigmsgs signals[] = {\n"); fprintf(outf, "\t{\"\",\t\"\"},\n"); /* yes, we could avoid the quadratic searching with an aux array. fap. */ for (s = 1; s <= maxsig; ++s) { for (snp = signamings; snp->signo && snp->signo != s; ++snp) /* */; if (snp->signo) fprintf(outf, "\t{\"%s\",\t\"%s\"},\n", snp->signame, snp->sigmsg); else fprintf(outf, "\t{\"sigunknown%d\",\t\"unknown signal %d\"},\n", s, s); } fprintf(outf, "};\n"); if (fclose(outf) == EOF) barf("could not fclose sigmsgs.c after writing"); return 0; } rc-1.7.4/builtins.c0000644000175000017500000002742012515531750011056 00000000000000/* builtins.c: the collection of rc's builtin commands */ /* NOTE: rc's builtins do not call "rc_error" because they are commands, and rc errors usually arise from syntax errors. e.g., you probably don't want interpretation of a shell script to stop because of a bad umask. */ #include "rc.h" #include #include #include #include #include "addon.h" #include "input.h" #include "jbwrap.h" #include "rlimit.h" #include "sigmsgs.h" static void b_break(char **), b_cd(char **), b_eval(char **), b_exit(char **), b_newpgrp(char **), b_return(char **), b_shift(char **), b_umask(char **), b_wait(char **), b_whatis(char **); #if HAVE_SETRLIMIT static void b_limit(char **); #endif #if RC_ECHO static void b_echo(char **); #endif static struct { builtin_t *p; char *name; } builtins[] = { { b_break, "break" }, { b_builtin, "builtin" }, { b_cd, "cd" }, #if RC_ECHO { b_echo, "echo" }, #endif { b_eval, "eval" }, { b_exec, "exec" }, { b_exit, "exit" }, #if HAVE_SETRLIMIT { b_limit, "limit" }, #endif { b_newpgrp, "newpgrp" }, { b_return, "return" }, { b_shift, "shift" }, { b_umask, "umask" }, { b_wait, "wait" }, { b_whatis, "whatis" }, { b_dot, "." }, #ifdef ADDONS ADDONS #endif }; extern builtin_t *isbuiltin(char *s) { int i; for (i = 0; i < arraysize(builtins); i++) if (streq(builtins[i].name, s)) return builtins[i].p; return NULL; } /* funcall() is the wrapper used to invoke shell functions. pushes $*, and "return" returns here. */ extern void funcall(char **av) { Jbwrap j; Estack e1, e2; Edata jreturn, star; if (sigsetjmp(j.j, 1)) return; starassign(*av, av+1, TRUE); jreturn.jb = &j; star.name = "*"; except(eReturn, jreturn, &e1); except(eVarstack, star, &e2); walk(treecpy(fnlookup(*av), nalloc), TRUE); varrm("*", TRUE); unexcept(); /* eVarstack */ unexcept(); /* eReturn */ } static void arg_count(char *name) { fprint(2, RC "too many arguments to %s\n", name); set(FALSE); } static void badnum(char *num) { fprint(2, RC "`%s' is a bad number\n", num); set(FALSE); } /* a dummy command. (exec() performs "exec" simply by not forking) */ extern void b_exec(char **ignore) { } #if RC_ECHO /* echo -n omits a newline. echo -- -n echos '-n' */ static void b_echo(char **av) { char *format = "%A\n"; if (*++av != NULL) { if (streq(*av, "-n")) format = "%A", av++; else if (streq(*av, "--")) av++; } fprint(1, format, av); set(TRUE); } #endif /* cd. traverse $cdpath if the directory given is not an absolute pathname */ static void b_cd(char **av) { List *s, nil; char *path = NULL; size_t t, pathlen = 0; if (*++av == NULL) { s = varlookup("home"); *av = (s == NULL) ? "/" : s->w; } else if (av[1] != NULL) { arg_count("cd"); return; } if (isabsolute(*av) || streq(*av, ".") || streq(*av, "..")) { /* absolute pathname? */ if (chdir(*av) < 0) { set(FALSE); uerror(*av); } else set(TRUE); } else { s = varlookup("cdpath"); if (s == NULL) { s = &nil; nil.w = ""; nil.n = NULL; } do { if (s != &nil && *s->w != '\0') { t = strlen(*av) + strlen(s->w) + 2; if (t > pathlen) path = nalloc(pathlen = t); strcpy(path, s->w); if (!streq(s->w, "/")) /* "//" is special to POSIX */ strcat(path, "/"); strcat(path, *av); } else { pathlen = 0; path = *av; } if (chdir(path) >= 0) { set(TRUE); if (interactive && *s->w != '\0' && !streq(s->w, ".")) fprint(1, "%s\n", path); return; } s = s->n; } while (s != NULL); fprint(2, "couldn't cd to %s\n", *av); set(FALSE); } } static void b_umask(char **av) { int i; if (*++av == NULL) { set(TRUE); i = umask(0); umask(i); fprint(1, "0%o\n", i); } else if (av[1] == NULL) { i = o2u(*av); if ((unsigned int) i > 0777) { fprint(2, "bad umask\n"); set(FALSE); } else { umask(i); set(TRUE); } } else { arg_count("umask"); return; } } static void b_exit(char **av) { if (*++av != NULL) ssetstatus(av); rc_exit(getstatus()); } /* raise a "return" exception, i.e., return from a function. if an integer argument is present, set $status to it */ static void b_return(char **av) { if (*++av != NULL) ssetstatus(av); rc_raise(eReturn); } /* raise a "break" exception for breaking out of for and while loops */ static void b_break(char **av) { if (av[1] != NULL) { arg_count("break"); return; } rc_raise(eBreak); } /* shift $* n places (default 1) */ static void b_shift(char **av) { int shift = (av[1] == NULL ? 1 : a2u(av[1])); List *s, *dollarzero; if (av[1] != NULL && av[2] != NULL) { arg_count("shift"); return; } if (shift < 0) { badnum(av[1]); return; } s = varlookup("*")->n; dollarzero = varlookup("0"); while (s != NULL && shift != 0) { s = s->n; --shift; } if (s == NULL && shift != 0) { fprint(2, "cannot shift\n"); set(FALSE); } else { varassign("*", append(dollarzero, s), FALSE); set(TRUE); } } /* dud function */ extern void b_builtin(char **ignore) { } /* wait for a given process, or all outstanding processes */ static void b_wait(char **av) { int status; pid_t pid; if (av[1] == NULL) { waitforall(); return; } if (av[2] != NULL) { arg_count("wait"); return; } if ((pid = a2u(av[1])) < 0) { badnum(av[1]); return; } if (rc_wait4(pid, &status, FALSE) > 0) setstatus(pid, status); else set(FALSE); sigchk(); } /* whatis without arguments prints all variables and functions. Otherwise, check to see if a name is defined as a variable, function or pathname. */ #define not(b) ((b)^TRUE) #define show(b) (not(eff|vee|pee|bee|ess)|(b)) static bool issig(char *s) { int i; for (i = 0; i < NUMOFSIGNALS; i++) if (streq(s, signals[i].name)) return TRUE; return FALSE; } static void b_whatis(char **av) { bool ess, eff, vee, pee, bee; bool f, found; int i, ac, c; List *s; Node *n; char *e; for (rc_optind = ac = 0; av[ac] != NULL; ac++) ; /* count the arguments for getopt */ ess = eff = vee = pee = bee = FALSE; while ((c = rc_getopt(ac, av, "sfvpb")) != -1) switch (c) { default: set(FALSE); return; case 's': ess = TRUE; break; case 'f': eff = TRUE; break; case 'v': vee = TRUE; break; case 'p': pee = TRUE; break; case 'b': bee = TRUE; break; } av += rc_optind; if (*av == NULL) { if (vee|eff) whatare_all_vars(eff, vee); if (ess) whatare_all_signals(); if (bee) for (i = 0; i < arraysize(builtins); i++) fprint(1, "builtin %s\n", builtins[i].name); if (pee) fprint(2, "whatis -p: must specify argument\n"); if (show(FALSE)) /* no options? */ whatare_all_vars(TRUE, TRUE); set(TRUE); return; } found = TRUE; for (i = 0; av[i] != NULL; i++) { f = FALSE; errno = ENOENT; if (show(vee) && (s = varlookup(av[i])) != NULL) { f = TRUE; prettyprint_var(1, av[i], s); } if (((show(ess)&&issig(av[i])) || show(eff)) && (n = fnlookup(av[i])) != NULL) { f = TRUE; prettyprint_fn(1, av[i], n); } else if (show(bee) && isbuiltin(av[i]) != NULL) { f = TRUE; fprint(1, "builtin %s\n", av[i]); } else if (show(pee) && (e = which(av[i], FALSE)) != NULL) { f = TRUE; fprint(1, "%S\n", e); } if (!f) { found = FALSE; if (errno != ENOENT) uerror(av[i]); else fprint(2, "%s not found\n", av[i]); } } set(found); } /* push a string to be eval'ed onto the input stack. evaluate it */ static void b_eval(char **av) { bool i = interactive; if (av[1] == NULL) return; interactive = FALSE; pushstring(av + 1, i); /* don't reset line numbers on noninteractive eval */ doit(TRUE); interactive = i; } /* push a file to be interpreted onto the input stack. with "-i" treat this as an interactive input source. */ extern void b_dot(char **av) { int fd; bool old_i = interactive, i = FALSE; Estack e; Edata star; av++; if (*av == NULL) return; if (streq(*av, "-i")) { av++; i = TRUE; } if (dasheye) { /* rc -i file has to do the right thing. reset the dasheye state to FALSE, though. */ dasheye = FALSE; i = TRUE; } if (*av == NULL) return; fd = rc_open(*av, rFrom); if (fd < 0) { uerror(*av); set(FALSE); return; } starassign(*av, av+1, TRUE); interactive = i; pushfd(fd); star.name = "*"; except(eVarstack, star, &e); doit(TRUE); varrm("*", TRUE); unexcept(); /* eVarstack */ interactive = old_i; } /* put rc into a new pgrp. Used on the NeXT where the Terminal program is broken (sigh) */ static void b_newpgrp(char **av) { if (av[1] != NULL) { arg_count("newpgrp"); return; } setpgid(rc_pid, rc_pid); /* XXX check return value */ tcsetpgrp(2, rc_pid); /* XXX check return value */ } /* Berkeley limit support was cleaned up by Paul Haahr. */ #if HAVE_SETRLIMIT static const struct Suffix kbsuf = { NULL, 1024, "k" }, mbsuf = { &kbsuf, 1024*1024, "m" }, gbsuf = { &mbsuf, 1024*1024*1024, "g" }, stsuf = { NULL, 1, "s" }, mtsuf = { &stsuf, 60, "m" }, htsuf = { &mtsuf, 60*60, "h" }; #define SIZESUF &gbsuf #define TIMESUF &htsuf #define NOSUF ((struct Suffix *) NULL) /* for RLIMIT_NOFILE on SunOS 4.1 */ static const struct Limit limits[] = { { "cputime", RLIMIT_CPU, TIMESUF }, { "filesize", RLIMIT_FSIZE, SIZESUF }, { "datasize", RLIMIT_DATA, SIZESUF }, { "stacksize", RLIMIT_STACK, SIZESUF }, { "coredumpsize", RLIMIT_CORE, SIZESUF }, #ifdef RLIMIT_NOFILE /* SUSv2, but not universal */ { "descriptors", RLIMIT_NOFILE, NOSUF }, #endif #ifdef RLIMIT_AS /* SUSv2, but not universal */ { "memoryuse", RLIMIT_AS, SIZESUF }, #endif #if defined(RLIMIT_VMEM) && !defined(RLIMIT_AS) /* old name for AS */ { "memoryuse", RLIMIT_VMEM, SIZESUF }, #endif #ifdef RLIMIT_RSS { "memoryrss", RLIMIT_RSS, SIZESUF }, #endif #ifdef RLIMIT_NPROC { "maxproc", RLIMIT_NPROC, NOSUF }, #endif #ifdef RLIMIT_MEMLOCK { "memorylocked", RLIMIT_MEMLOCK, SIZESUF }, #endif #ifdef RLIMIT_LOCKS { "filelocks", RLIMIT_LOCKS, NOSUF }, #endif { NULL, 0, NULL } }; static void printlimit(const struct Limit *limit, bool hard) { struct rlimit rlim; rlim_t lim; getrlimit(limit->flag, &rlim); if (hard) lim = rlim.rlim_max; else lim = rlim.rlim_cur; if (lim == RLIM_INFINITY) fprint(1, "%s \tunlimited\n", limit->name); else { const struct Suffix *suf; for (suf = limit->suffix; suf != NULL; suf = suf->next) if (lim % suf->amount == 0 && (lim != 0 || suf->amount > 1)) { lim /= suf->amount; break; } fprint(1, RLIM_FMT, limit->name, (RLIM_CONV)lim, (suf == NULL || lim == 0) ? "" : suf->name); } } static bool parselimit(const struct Limit *resource, rlim_t *limit, char *s) { char *t; int len = strlen(s); const struct Suffix *suf = resource->suffix; *limit = 1; if (streq(s, "unlimited")) { *limit = RLIM_INFINITY; return TRUE; } if (suf == TIMESUF && (t = strchr(s, ':')) != NULL) { int min, sec; *t++ = '\0'; min = a2u(s); sec = a2u(t); if (min == -1 || sec == -1) return FALSE; *limit = 60 * min + sec; } else { int n; for (; suf != NULL; suf = suf->next) if (streq(suf->name, s + len - strlen(suf->name))) { s[len - strlen(suf->name)] = '\0'; *limit *= suf->amount; break; } n = a2u(s); if (n == -1) return FALSE; *limit *= n; } return TRUE; } static void b_limit(char **av) { const struct Limit *lp = limits; bool hard = FALSE; if (*++av != NULL && streq(*av, "-h")) { av++; hard = TRUE; } if (*av == NULL) { for (; lp->name != NULL; lp++) printlimit(lp, hard); return; } for (;; lp++) { if (lp->name == NULL) { fprint(2, "no such limit\n"); set(FALSE); return; } if (streq(*av, lp->name)) break; } if (*++av == NULL) printlimit(lp, hard); else { struct rlimit rlim; rlim_t pl; getrlimit(lp->flag, &rlim); if (!parselimit(lp, &pl, *av)) { fprint(2, "bad limit\n"); set(FALSE); return; } if (hard) rlim.rlim_max = pl; else rlim.rlim_cur = pl; if (setrlimit(lp->flag, &rlim) == -1) { uerror("setrlimit"); set(FALSE); } else set(TRUE); } } #endif rc-1.7.4/which.c0000644000175000017500000000637512515531750010335 00000000000000/* which.c: check to see if a file is executable. This function was originally written with Maarten Litmaath's which.c as a template, but was changed in order to accommodate the possibility of rc's running setuid or the possibility of executing files not in the primary group. Much of this file has been re-vamped by Paul Haahr. I re-re-vamped the functions that Paul supplied to correct minor bugs and to strip out unneeded functionality. */ #include "rc.h" #include #include #include #include "getgroups.h" #define X_USR 0100 #define X_GRP 0010 #define X_OTH 0001 #define X_ALL (X_USR|X_GRP|X_OTH) static bool initialized = FALSE; static uid_t uid; static gid_t gid; #if HAVE_GETGROUPS static int ngroups; static GETGROUPS_T *gidset; /* determine whether gid lies in gidset */ static int ingidset(gid_t g) { int i; for (i = 0; i < ngroups; ++i) if (g == gidset[i]) return 1; return 0; } #else #define ingidset(g) (FALSE) #endif /* A home-grown access/stat. Does the right thing for group-executable files. Returns a bool instead of this -1 nonsense. */ static bool rc_access(char *path, bool verbose) { struct stat st; int mask; if (stat(path, &st) != 0) { if (verbose) /* verbose flag only set for absolute pathname */ uerror(path); return FALSE; } if (uid == 0) mask = X_ALL; else if (uid == st.st_uid) mask = X_USR; else if (gid == st.st_gid || ingidset(st.st_gid)) mask = X_GRP; else mask = X_OTH; if (((st.st_mode & S_IFMT) == S_IFREG) && (st.st_mode & mask)) return TRUE; errno = EACCES; if (verbose) uerror(path); return FALSE; } /* replace non-printing characters with question marks in a freshly * allocated string */ static char *protect(char *in) { int l = strlen(in); char *out = ealloc(l + 1); int i; for (i = 0; i < l; ++i) out[i] = isprint(in[i]) ? in[i] : '?'; out[i] = '\0'; return out; } /* return a full pathname by searching $path, and by checking the status of the file */ extern char *which(char *name, bool verbose) { static char *test = NULL; static size_t testlen = 0; List *path; int len; if (name == NULL) /* no filename? can happen with "> foo" as a command */ return NULL; if (!initialized) { initialized = TRUE; uid = geteuid(); gid = getegid(); #if HAVE_GETGROUPS #if HAVE_POSIX_GETGROUPS ngroups = getgroups(0, (GETGROUPS_T *)0); if (ngroups < 0) { uerror("getgroups"); rc_exit(1); } #else ngroups = NGROUPS; #endif if (ngroups) { gidset = ealloc(ngroups * sizeof(GETGROUPS_T)); getgroups(ngroups, gidset); } #endif } if (isabsolute(name)) /* absolute pathname? */ return rc_access(name, verbose) ? name : NULL; len = strlen(name); for (path = varlookup("path"); path != NULL; path = path->n) { size_t need = strlen(path->w) + len + 2; /* one for null terminator, one for the '/' */ if (testlen < need) { efree(test); test = ealloc(testlen = need); } if (*path->w == '\0') { strcpy(test, name); } else { strcpy(test, path->w); if (!streq(test, "/")) /* "//" is special to POSIX */ strcat(test, "/"); strcat(test, name); } if (rc_access(test, FALSE)) return test; } if (verbose) { char *n = protect(name); fprint(2, RC "cannot find `%s'\n", n); efree(n); } return NULL; } rc-1.7.4/parse.y0000644000175000017500000001240712507445074010370 00000000000000/* parse.y */ /* * Adapted from rc grammar, v10 manuals, volume 2. */ %{ /* note that this actually needs to appear before any system header files are included; byacc likes to throw in first. */ #include "rc.h" static Node *star, *nolist; Node *parsetree; /* not using yylval because bison declares it as an auto */ %} %token ANDAND BACKBACK BANG CASE COUNT DUP ELSE END FLAT FN FOR IF IN %token OROR PIPE REDIR SREDIR SUB SUBSHELL SWITCH TWIDDLE WHILE WORD HUH %left WHILE ')' ELSE %left ANDAND OROR '\n' %left BANG SUBSHELL %left PIPE %right '$' %left SUB /* */ %union { struct Node *node; struct Redir redir; struct Pipe pipe; struct Dup dup; struct Word word; char *keyword; } %type REDIR SREDIR %type PIPE %type DUP %type WORD %type keyword %type assign body brace case cbody cmd cmdsa cmdsan comword epilog first line nlwords paren redir sword simple iftail word words %start rc %% rc : line end { parsetree = $1; YYACCEPT; } | error end { yyerrok; parsetree = NULL; YYABORT; } /* an rc line may end in end-of-file as well as newline, e.g., rc -c 'ls' */ end : END /* EOF */ { if (!heredoc(1)) YYABORT; } /* flag error if there is a heredoc in the queue */ | '\n' { if (!heredoc(0)) YYABORT; } /* get heredoc on \n */ /* a cmdsa is a command followed by ampersand or newline (used in "line" and "body") */ cmdsa : cmd ';' | cmd '&' { $$ = ($1 != NULL ? mk(nNowait,$1) : $1); } /* a line is a single command, or a command terminated by ; or & followed by a line (recursive) */ line : cmd | cmdsa line { $$ = ($1 != NULL ? mk(nBody,$1,$2) : $2); } /* a body is like a line, only commands may also be terminated by newline */ body : cmd | cmdsan body { $$ = ($1 == NULL ? $2 : $2 == NULL ? $1 : mk(nBody,$1,$2)); } cmdsan : cmdsa | cmd '\n' { $$ = $1; if (!heredoc(0)) YYABORT; } /* get h.d. on \n */ brace : '{' body '}' { $$ = $2; } paren : '(' body ')' { $$ = $2; } assign : first '=' word { $$ = mk(nAssign,$1,$3); } epilog : { $$ = NULL; } | redir epilog { $$ = mk(nEpilog,$1,$2); } /* a redirection is a dup (e.g., >[1=2]) or a file redirection. (e.g., > /dev/null) */ redir : DUP { $$ = mk(nDup,$1.type,$1.left,$1.right); } | REDIR word { $$ = mk(nRedir,$1.type,$1.fd,$2); if ($1.type == rHeredoc && !qdoc($2, $$)) YYABORT; /* queue heredocs up */ } | SREDIR word { $$ = mk(nRedir,$1.type,$1.fd,$2); if ($1.type == rHeredoc && !qdoc($2, $$)) YYABORT; /* queue heredocs up */ } case : CASE words ';' { $$ = mk(nCase, $2); } | CASE words '\n' { $$ = mk(nCase, $2); } cbody : cmd { $$ = mk(nCbody, $1, NULL); } | case cbody { $$ = mk(nCbody, $1, $2); } | cmdsan cbody { $$ = mk(nCbody, $1, $2); } iftail : cmd %prec ELSE | brace ELSE optnl cmd { $$ = mk(nElse,$1,$4); } cmd : /* empty */ %prec WHILE { $$ = NULL; } | simple | brace epilog { $$ = mk(nBrace,$1,$2); } | IF paren optnl iftail { $$ = mk(nIf,$2,$4); } | FOR '(' word IN words ')' optnl cmd { $$ = mk(nForin,$3,$5,$8); } | FOR '(' word ')' optnl cmd { $$ = mk(nForin,$3,star,$6); } | WHILE paren optnl cmd { $$ = mk(nWhile,$2,$4); } | SWITCH '(' word ')' optnl '{' cbody '}' { $$ = mk(nSwitch,$3,$7); } | TWIDDLE optcaret word words { $$ = mk(nMatch,$3,$4); } | cmd ANDAND optnl cmd { $$ = mk(nAndalso,$1,$4); } | cmd OROR optnl cmd { $$ = mk(nOrelse,$1,$4); } | cmd PIPE optnl cmd { $$ = mk(nPipe,$2.left,$2.right,$1,$4); } | redir cmd %prec BANG { $$ = ($2 != NULL ? mk(nPre,$1,$2) : $1); } | assign cmd %prec BANG { $$ = ($2 != NULL ? mk(nPre,$1,$2) : $1); } | BANG optcaret cmd { $$ = mk(nBang,$3); } | SUBSHELL optcaret cmd { $$ = mk(nSubshell,$3); } | FN words brace { $$ = mk(nNewfn,$2,$3); } | FN words { $$ = mk(nRmfn,$2); } optcaret : /* empty */ | '^' simple : first | simple word { $$ = ($2 != NULL ? mk(nArgs,$1,$2) : $1); } | simple redir { $$ = mk(nArgs,$1,$2); } first : comword | first '^' sword { $$ = mk(nConcat,$1,$3); } sword : comword | keyword { $$ = mk(nWord, $1, NULL, FALSE); } word : sword | word '^' sword { $$ = mk(nConcat,$1,$3); } comword : '$' sword { $$ = mk(nVar,$2); } | '$' sword SUB words ')' { $$ = mk(nVarsub,$2,$4); } | COUNT sword { $$ = mk(nCount,$2); } | FLAT sword { $$ = mk(nFlat, $2); } | '`' sword { $$ = mk(nBackq,nolist,$2); } | '`' brace { $$ = mk(nBackq,nolist,$2); } | BACKBACK word brace { $$ = mk(nBackq,$2,$3); } | BACKBACK word sword { $$ = mk(nBackq,$2,$3); } | '(' nlwords ')' { $$ = $2; } | REDIR brace { $$ = mk(nNmpipe,$1.type,$1.fd,$2); } | WORD { $$ = mk(nWord, $1.w, $1.m, $1.q); } keyword : FOR { $$ = "for"; } | IN { $$ = "in"; } | WHILE { $$ = "while"; } | IF { $$ = "if"; } | SWITCH { $$ = "switch"; } | FN { $$ = "fn"; } | ELSE { $$ = "else"; } | CASE { $$ = "case"; } | TWIDDLE { $$ = "~"; } | BANG { $$ = "!"; } | SUBSHELL { $$ = "@"; } words : { $$ = NULL; } | words word { $$ = ($1 != NULL ? ($2 != NULL ? mk(nLappend,$1,$2) : $1) : $2); } nlwords : { $$ = NULL; } | nlwords '\n' | nlwords word { $$ = ($1 != NULL ? ($2 != NULL ? mk(nLappend,$1,$2) : $1) : $2); } optnl : /* empty */ | optnl '\n' %% void initparse() { star = treecpy(mk(nVar, mk(nWord,"*", NULL, FALSE)), ealloc); nolist = treecpy(mk(nVar, mk(nWord,"ifs", NULL, FALSE)), ealloc); } rc-1.7.4/exec.c0000644000175000017500000000570612507445074010160 00000000000000/* exec.c */ #include "rc.h" #include #include #include "wait.h" /* Takes an argument list and does the appropriate thing (calls a builtin, calls a function, etc.) */ extern void exec(List *s, bool parent) { char **av, **ev = NULL; int stat; pid_t pid; builtin_t *b; char *path = NULL; bool didfork, returning, saw_exec, saw_builtin; av = list2array(s, dashex); saw_builtin = saw_exec = FALSE; do { if (*av == NULL || isabsolute(*av)) b = NULL; else if (!saw_builtin && fnlookup(*av) != NULL) b = funcall; else b = isbuiltin(*av); /* a builtin applies only to the immmediately following command, e.g., builtin exec echo hi */ saw_builtin = FALSE; if (b == b_exec) { av++; saw_exec = TRUE; parent = FALSE; } else if (b == b_builtin) { av++; saw_builtin = TRUE; } } while (b == b_exec || b == b_builtin); if (*av == NULL && saw_exec) { /* do redirs and return on a null exec */ doredirs(); return; } /* force an exit on exec with any rc_error, but not for null commands as above */ if (saw_exec) rc_pid = -1; if (b == NULL) { path = which(*av, TRUE); if (path == NULL && *av != NULL) { /* perform null commands for redirections */ set(FALSE); redirq = NULL; if (parent) return; rc_exit(1); } ev = makeenv(); /* environment only needs to be built for execve() */ } /* If parent & the redirq is nonnull, builtin or not it has to fork. If the fifoq is nonnull, then it must be emptied at the end so we must fork no matter what. */ if ((parent && (b == NULL || redirq != NULL)) || outstanding_cmdarg()) { pid = rc_fork(); didfork = TRUE; } else { pid = 0; didfork = FALSE; } returning = (!didfork && parent); switch (pid) { case -1: uerror("fork"); rc_error(NULL); /* NOTREACHED */ case 0: if (!returning) setsigdefaults(FALSE); pop_cmdarg(FALSE); doredirs(); /* null commands performed for redirections */ if (*av == NULL || b != NULL) { if (b != NULL) (*b)(av); if (returning) return; rc_exit(getstatus()); } rc_execve(path, (char * const *) av, (char * const *) ev); #ifdef DEFAULTINTERP if (errno == ENOEXEC) { *av = path; *--av = DEFAULTINTERP; execve(*av, (char * const *) av, (char * const *) ev); } #endif uerror(*av); rc_exit(1); /* NOTREACHED */ default: redirq = NULL; rc_wait4(pid, &stat, TRUE); setstatus(-1, stat); /* There is a very good reason for having this weird nl_on_intr variable: when rc and its child both process a SIGINT, (i.e., the child has a SIGINT catcher installed) then you don't want rc to print a newline when the child finally exits. Here's an example: ed, , . rc does not and should not print a newline before the next prompt, even though there's a SIGINT in its signal vector. */ if (WIFEXITED(stat)) nl_on_intr = FALSE; sigchk(); nl_on_intr = TRUE; pop_cmdarg(TRUE); } } rc-1.7.4/footobar.c0000644000175000017500000002206512515531750011040 00000000000000/* footobar.c: a collection of functions to convert internal representations of variables and functions to external representations, and vice versa */ #include "rc.h" #include "input.h" /* protect an exported name from brain-dead shells */ #if PROTECT_ENV static bool Fconv(Format *f, int ignore) { unsigned const char *s = va_arg(f->args, unsigned const char *); int c; while ((c = *s++) != '\0') if (dnw[c] || c == '*' || (c == '_' && *s == '_')) fmtprint(f, "__%02x", c); else fmtputc(f, c); return FALSE; } #endif /* convert a redirection to a printable form */ static bool Dconv(Format *f, int ignore) { const char *name = "?"; int n = va_arg(f->args, int); switch (n) { case rCreate: name = ">"; break; case rAppend: name = ">>"; break; case rFrom: name = "<"; break; case rHeredoc: name = "<<"; break; case rHerestring: name = "<<<"; break; } fmtcat(f, name); return FALSE; } /* defaultfd -- return the default fd for a given redirection operation */ static int defaultfd(int op) { return (op == rCreate || op == rAppend) ? 1 : 0; } /* convert a function in Node * form into something rc can parse (and humans can read?) */ static bool Tconv(Format *f, int ignore) { bool dollar = f->flags & FMT_altform; Node *n = va_arg(f->args, Node *); if (n == NULL) { fmtprint(f, "()"); return FALSE; } switch (n->type) { case nBang: fmtprint(f, "!%T", n->u[0].p); break; case nCase: fmtprint(f, "case %T", n->u[0].p); break; case nNowait: fmtprint(f, "%T&", n->u[0].p); break; case nRmfn: fmtprint(f, "fn %T", n->u[0].p); break; case nSubshell: fmtprint(f, "@ %T", n->u[0].p); break; case nAndalso: fmtprint(f, "%T&&%T", n->u[0].p, n->u[1].p); break; case nAssign: fmtprint(f, "%T=%T", n->u[0].p, n->u[1].p); break; case nConcat: fmtprint(f, "%T^%T", n->u[0].p, n->u[1].p); break; case nElse: fmtprint(f, "{%T}else %T", n->u[0].p, n->u[1].p); break; case nNewfn: fmtprint(f, "fn %T {%T}", n->u[0].p, n->u[1].p); break; case nIf: fmtprint(f, "if(%T)%T", n->u[0].p, n->u[1].p); break; case nOrelse: fmtprint(f, "%T||%T", n->u[0].p, n->u[1].p); break; case nArgs: fmtprint(f, "%T %T", n->u[0].p, n->u[1].p); break; case nSwitch: fmtprint(f, "switch(%T){%T}", n->u[0].p, n->u[1].p); break; case nMatch: fmtprint(f, "~ %T %T", n->u[0].p, n->u[1].p); break; case nWhile: fmtprint(f, "while(%T)%T", n->u[0].p, n->u[1].p); break; case nForin: fmtprint(f, "for(%T in %T)%T", n->u[0].p, n->u[1].p, n->u[2].p); break; case nVarsub: fmtprint(f, "$%T(%T)", n->u[0].p, n->u[1].p); break; case nWord: fmtprint(f, n->u[2].i && quotep(n->u[0].s, dollar) ? "%#S" : "%S", n->u[0].s); break; case nLappend: { static bool inlist; if (!inlist) { inlist = TRUE; fmtprint(f, "(%T %T)", n->u[0].p, n->u[1].p); inlist = FALSE; } else { fmtprint(f, "%T %T", n->u[0].p, n->u[1].p); } break; } case nCount: case nFlat: case nVar: { char *lp = "", *rp = ""; Node *n0 = n->u[0].p; if (n0->type != nWord) lp = "(", rp = ")"; switch (n->type) { default: panic("this can't happen"); break; case nCount: fmtprint(f, "$#%s%#T%s", lp, n0, rp); break; case nFlat: fmtprint(f, "$^%s%#T%s", lp, n0, rp); break; case nVar: fmtprint(f, "$%s%#T%s", lp, n0, rp); break; } break; } case nDup: if (n->u[2].i != -1) fmtprint(f, "%D[%d=%d]", n->u[0].i, n->u[1].i, n->u[2].i); else fmtprint(f, "%D[%d=]", n->u[0].i, n->u[1].i); break; case nBackq: { Node *n0 = n->u[0].p, *n00; if (n0 != NULL && n0->type == nVar && (n00 = n0->u[0].p) != NULL && n00->type == nWord && streq(n00->u[0].s, "ifs")) fmtprint(f, "`"); else fmtprint(f, "``%T", n0); fmtprint(f, "{%T}", n->u[1].p); break; } case nCbody: case nBody: { Node *n0 = n->u[0].p; if (n0 != NULL) fmtprint(f, "%T", n->u[0].p); if (n->u[1].p != NULL) { if (n0 != NULL && n0->type != nNowait) fmtprint(f, ";"); fmtprint(f, "%T", n->u[1].p); } break; } case nBrace: fmtprint(f, "{%T}", n->u[0].p); if (n->u[1].p != NULL) fmtprint(f, "%T", n->u[1].p); break; case nEpilog: case nPre: fmtprint(f, "%T", n->u[0].p); if (n->u[1].p != NULL) fmtprint(f, " %T", n->u[1].p); break; case nPipe: { int ofd = n->u[0].i, ifd = n->u[1].i; fmtprint(f, "%T|", n->u[2].p); if (ifd != 0) fmtprint(f, "[%d=%d]", ofd, ifd); else if (ofd != 1) fmtprint(f, "[%d]", ofd); fmtprint(f, "%T", n->u[3].p); break; } case nRedir: { int op = n->u[0].i; fmtprint(f, "%D", op); if (n->u[1].i != defaultfd(op)) fmtprint(f, "[%d]", n->u[1].i); fmtprint(f, "%T", n->u[2].p); break; } case nNmpipe: { int op = n->u[0].i; fmtprint(f, "%D", op); if (n->u[1].i != defaultfd(op)) fmtprint(f, "[%d]", n->u[1].i); fmtprint(f, "{%T}", n->u[2].p); break; } } return FALSE; } /* convert a List to an array, for execve() */ extern char **list2array(List *s, bool print) { char **argv, **av; if (print) fprint(2, "%L\n", s, " "); /* Allocate 3 extra spots (2 for the fake execve & 1 for defaulting to sh) and hide these from exec(). */ argv = av = (char **) nalloc((listnel(s) + 4) * sizeof *av) + 3; while (s != NULL) { *av++ = s->w; s = s->n; } *av = NULL; return argv; } /* figure out the name of a variable given an environment string. */ extern char *get_name(char *s) { char *eq = strchr(s, '='); char *r, *result; int c; if (eq == NULL) return NULL; r = result = nalloc(eq - s + 1); while (1) switch (c = *s++) { case '=': *r++ = '\0'; return result; #if PROTECT_ENV case '_': if (*s == '_') { static const char hexchar[] = "0123456789abcdef"; char *h1 = strchr(hexchar, s[1]); char *h2 = strchr(hexchar, s[2]); if (h1 != NULL && h2 != NULL) { *r++ = ((h1 - hexchar) << 4) | (h2 - hexchar); s += 3; break; } } /* FALLTHROUGH */ #endif default: *r++ = c; break; } } /* interpret a variable from environment. ^A separates list elements; ^B escapes a literal ^A or ^B. For minimal surprise, ^B followed by anything other than ^A or ^B is preserved. */ extern List *parse_var(char *extdef) { char *begin, *end, *from, *to; int len; List *first, *last, *new; first = last = NULL; begin = strchr(extdef, '='); assert(begin); /* guaranteed by initenv() */ while (*begin) { ++begin; end = begin; len = 0; while (*end != ENV_SEP && *end != '\0') { if (*end == ENV_ESC) { ++end; if (*end != ENV_SEP && *end != ENV_ESC) --end; } ++end; ++len; } new = enew(List); if (last) last->n = new; else first = new; last = new; new->w = ealloc(len + 1); new->m = NULL; new->n = NULL; to = new->w; for (from = begin; from < end; ++from) { if (*from == ENV_ESC) { ++from; if (*from != ENV_SEP && *from != ENV_ESC) --from; } *to = *from; ++to; } *to = '\0'; begin = end; } return first; } /* get an environment entry for a function and have rc parse it. */ #define PREFIX "fn x" #define PRELEN conststrlen(PREFIX) extern Node *parse_fn(char *extdef) { Node *def; char *s, old[PRELEN]; if ((s = strchr(extdef, '=')) == NULL) return NULL; memcpy(old, s -= (PRELEN-1), PRELEN); memcpy(s, PREFIX, PRELEN); def = parseline(s); memcpy(s, old, PRELEN); return (def == NULL || def->type != nNewfn) ? NULL : def->u[1].p; } static bool Aconv(Format *f, int ignore) { char **a = va_arg(f->args, char **); if (*a != NULL) { fmtcat(f, *a); while (*++a != NULL) fmtprint(f, " %s", *a); } return FALSE; } /* %L -- print a list */ static bool Lconv(Format *f, int ignore) { bool plain; char *sep; List *l, *n; plain = f->flags & FMT_leftside; l = va_arg(f->args, List *); sep = va_arg(f->args, char *); if (l == NULL && (f->flags & FMT_leftside) == 0) fmtprint(f, "()"); else { for (; l != NULL; l = n) { n = l->n; fmtprint(f, plain ? "%s" : "%-S", l->w); if (n != NULL) fmtputc(f, *sep); } } return FALSE; } /* %W -- print a list for exporting */ static bool Wconv(Format *f, int ignore) { List *l, *n; l = va_arg(f->args, List *); for (; l != NULL; l = n) { char c, *s; for (s = l->w; (c = *s) != '\0'; ++s) { if (c == ENV_SEP || c == ENV_ESC) fmtputc(f, ENV_ESC); fmtputc(f, c); } n = l->n; if (n != NULL) fmtputc(f, ENV_SEP); } return FALSE; } #define ISMETA(c) (c == '*' || c == '?' || c == '[') static bool Sconv(Format *f, int ignore) { int c; unsigned char *s = va_arg(f->args, unsigned char *), *t = s; bool quoted = (f->flags & FMT_altform) != 0; /* '#' */ bool metaquote = (f->flags & FMT_leftside) != 0; /* '-' */ if (*s == '\0') { fmtprint(f, "''"); return FALSE; } if (!quoted) { while ((c = *t++) != '\0') if (nw[c] == 1 || (metaquote && ISMETA(c))) goto quoteit; fmtprint(f, "%s", s); return FALSE; } quoteit: fmtputc(f, '\''); while ((c = *s++) != '\0') { fmtputc(f, c); if (c == '\'') fmtputc(f, '\''); } fmtputc(f, '\''); return FALSE; } void initprint(void) { fmtinstall('A', Aconv); fmtinstall('L', Lconv); fmtinstall('S', Sconv); fmtinstall('T', Tconv); fmtinstall('D', Dconv); fmtinstall('W', Wconv); #if PROTECT_ENV fmtinstall('F', Fconv); #else fmtinstall('F', fmtinstall('s', NULL)); #endif } rc-1.7.4/wait.h0000644000175000017500000000071712507445074010202 00000000000000#if HAVE_SYS_WAIT_H #include #endif /* Fake the POSIX wait() macros if we don't have them. */ #ifndef WIFEXITED #define WIFEXITED(s) (((s) & 0xFF) == 0) #endif #ifndef WEXITSTATUS #define WEXITSTATUS(s) (((unsigned)(s) >> 8) && 0xFF) #endif #ifndef WIFSIGNALED #define WIFSIGNALED(s) (((s) & 0xFF) != 0) #endif #ifndef WTERMSIG #define WTERMSIG(s) ((s) & 0x7F) #endif /* These don't exist in POSIX. */ #define myWIFDUMPED(s) (((s) & 0x80) != 0) rc-1.7.4/execve.c0000644000175000017500000000352012507445074010503 00000000000000/* execve.c: an execve() for geriatric unices without #! */ /* NOTE: this file depends on a hack in footobar.c which places two free spots before av[][] so that execve does not have to call malloc. */ #include "rc.h" #include #define giveupif(x) { if (x) goto fail; } extern int rc_execve(char *path, char **av, char **ev) { int fd, len, fst, snd, end; bool noarg; char pb[256]; /* arbitrary but generous limit */ execve(path, av, ev); if (errno != ENOEXEC) return -1; fd = rc_open(path, rFrom); giveupif(fd < 0); len = read(fd, pb, sizeof pb); close(fd); /* reject scripts which don't begin with #! */ giveupif(len <= 0 || pb[0] != '#' || pb[1] != '!'); for (fst = 2; fst < len && (pb[fst] == ' ' || pb[fst] == '\t'); fst++) ; /* skip leading whitespace */ giveupif(fst == len); for (snd = fst; snd < len && pb[snd] != ' ' && pb[snd] != '\t' && pb[snd] != '\n'; snd++) ; /* skip first arg */ giveupif(snd == len); noarg = (pb[snd] == '\n'); pb[snd++] = '\0'; /* null terminate the first arg */ if (!noarg) { while (snd < len && (pb[snd] == ' ' || pb[snd] == '\t')) snd++; /* skip whitespace to second arg */ giveupif(snd == len); noarg = (pb[snd] == '\n'); /* could have trailing whitespace after only one arg */ if (!noarg) { for (end = snd; end < len && pb[end] != ' ' && pb[end] != '\t' && pb[end] != '\n'; end++) ; /* skip to the end of the second arg */ giveupif(end == len); if (pb[end] == '\n') { pb[end] = '\0'; /* null terminate the first arg */ } else { /* else check for a spurious third arg */ pb[end++] = '\0'; while (end < len && (pb[end] == ' ' || pb[end] == '\t')) end++; giveupif(end == len || pb[end] != '\n'); } } } *av = path; if (!noarg) *--av = pb + snd; *--av = pb + fst; execve(*av, av, ev); return -1; fail: errno = ENOEXEC; return -1; } rc-1.7.4/redir.c0000644000175000017500000000406112507445074010332 00000000000000/* redir.c: code for opening files and piping heredocs after fork but before exec. */ #include "rc.h" /* Walk the redirection queue, and open files and dup2 to them. Also, here-documents are treated here by dumping them down a pipe. (this should make here-documents fast on systems with lots of memory which do pipes right. Under sh, a file is copied to /tmp, and then read out of /tmp again. I'm interested in knowing how much faster, say, shar runs when unpacking when invoked with rc instead of sh. On my sun4/280, it runs in about 60-75% of the time of sh for unpacking the rc source distribution.) */ extern void doredirs() { List *fname; int fd, p[2]; Rq *r; for (r = redirq; r != NULL; r = r->n) { switch(r->r->type) { default: panic("unexpected node in doredirs"); /* NOTREACHED */ case nRedir: if (r->r->u[0].i == rHerestring) { fname = flatten(glom(r->r->u[2].p)); /* fname is really a string */ if (pipe(p) < 0) { uerror("pipe"); rc_error(NULL); } if (rc_fork() == 0) { /* child writes to pipe */ setsigdefaults(FALSE); close(p[0]); if (fname != NULL) writeall(p[1], fname->w, strlen(fname->w)); exit(0); } else { close(p[1]); if (mvfd(p[0], r->r->u[1].i) < 0) rc_error(NULL); } } else { fname = glob(glom(r->r->u[2].p)); if (fname == NULL) rc_error("null filename in redirection"); if (fname->n != NULL) rc_error("multi-word filename in redirection"); switch (r->r->u[0].i) { default: panic("unexpected node in doredirs"); /* NOTREACHED */ case rCreate: case rAppend: case rFrom: fd = rc_open(fname->w, r->r->u[0].i); break; } if (fd < 0) { uerror(fname->w); rc_error(NULL); } if (mvfd(fd, r->r->u[1].i) < 0) rc_error(NULL); } break; case nDup: if (r->r->u[2].i == -1) close(r->r->u[1].i); else if (r->r->u[2].i != r->r->u[1].i) { if (dup2(r->r->u[2].i, r->r->u[1].i) < 0) { uerror("dup2"); rc_error(NULL); } } } } redirq = NULL; } rc-1.7.4/addon.c0000644000175000017500000000061512507445074010313 00000000000000/* This file is NOT BUILT by default. Together with addon.h, it provides an example of how to add new builtins to rc. */ #include "rc.h" #include "addon.h" void b_sum(char **av) { long sum = 0; while (*++av) sum += atol(*av); fprint(1, "%ld\n", sum); set(TRUE); } void b_prod(char **av) { long sum = 1; while (*++av) sum *= atol(*av); fprint(1, "%ld\n", sum); set(TRUE); } rc-1.7.4/rlimit.h0000644000175000017500000000153212507445074010532 00000000000000/* What a mess. This file attempts to straighten everything out. */ #if HAVE_SETRLIMIT #if HAVE_SYS_RESOURCE_H #include #if RLIMIT_NEEDS_KERNEL #define _KERNEL #endif #include #if RLIMIT_NEEDS_KERNEL #undef _KERNEL #endif #else #include #endif #if HAVE_LIMITS_H #include #endif #ifndef HAVE_RLIM_T #if RLIM_T_IS_QUAD_T typedef quad_t rlim_t; #else typedef long rlim_t; #endif #endif #if HAVE_QUAD_T #define RLIM_CONV quad_t #define RLIM_FMT "%s \t%qd%s\n" #else #define RLIM_CONV long #define RLIM_FMT "%s \t%ld%s\n" #endif #if defined(RLIMIT_OFILE) && !defined (RLIMIT_NOFILE) #define RLIMIT_NOFILE RLIMIT_OFILE #endif struct Suffix { const struct Suffix *next; long amount; char *name; }; struct Limit { char *name; int flag; const struct Suffix *suffix; }; #endif /* HAVE_SETRLIMIT */ rc-1.7.4/addon.h0000644000175000017500000000146012507445074010317 00000000000000/* This file is NOT BUILT by default. Together with addon.c, it provides an example of how to add new builtins to rc. To define a new builtin, it must appear in the macro ADDONS, which is a comma-separated list of pairs of function pointers (the implementation of the new builtin) and string literals (the name of the new builtin). Any new builtin functions must also have proper prototypes in this file. This is always of the same form. void b_NAME(char **av); The first argument, av[0], is the name of the builtin. The last argument is followed by a NULL pointer. Builtins report their exit status using set(TRUE) or set(FALSE). */ #if RC_ADDON #define ADDONS \ { b_sum, "+" }, \ { b_prod, "x" }, extern void b_sum(char **av); extern void b_prod(char **av); #endif rc-1.7.4/signal.c0000644000175000017500000000412312507445074010501 00000000000000/* signal.c: a Hugh-approved signal handler. */ #include "rc.h" #include #include #include "sigmsgs.h" #include "jbwrap.h" #if HAVE_SIGACTION void (*sys_signal(int signum, void (*handler)(int)))(int) { struct sigaction new, old; new.sa_handler = handler; new.sa_flags = 0; /* clear SA_RESTART */ sigfillset(&new.sa_mask); sigaction(signum, &new, &old); return old.sa_handler; } #else void (*sys_signal(int signum, void (*handler)(int)))(int) { return signal(signum, handler); } #endif void (*sighandlers[NUMOFSIGNALS])(int); static volatile sig_atomic_t sigcount, caught[NUMOFSIGNALS]; extern void catcher(int s) { if (caught[s] == 0) { sigcount++; caught[s] = 1; } sys_signal(s, catcher); #if HAVE_RESTARTABLE_SYSCALLS if (slow) { siglongjmp(slowbuf.j, s); } #endif } extern void sigchk() { void (*h)(int); int s, i; if (sigcount == 0) return; /* ho hum; life as usual */ if (forked) exit(1); /* exit unconditionally on a signal in a child process */ for (i = 0, s = -1; i < NUMOFSIGNALS; i++) if (caught[i] != 0) { s = i; --sigcount; caught[s] = 0; break; } if (s == -1) panic("all-zero sig vector with nonzero sigcount"); if ((h = sighandlers[s]) == SIG_DFL) panic("caught signal set to SIG_DFL"); if (h == SIG_IGN) panic("caught signal set to SIG_IGN"); (*h)(s); } extern void (*rc_signal(int s, void (*h)(int)))(int) { void (*old)(int); sigchk(); old = sighandlers[s]; sighandlers[s] = h; if (h == SIG_DFL || h == SIG_IGN) sys_signal(s, h); else sys_signal(s, catcher); return old; } extern void initsignal() { void (*h)(int); int i; #if HAVE_SYSV_SIGCLD /* Ensure that SIGCLD is not SIG_IGN. Solaris's rshd does this. :-( */ h = sys_signal(SIGCLD, SIG_IGN); if (h != SIG_IGN && h != SIG_ERR) sys_signal(SIGCLD, h); else sys_signal(SIGCLD, SIG_DFL); #endif for (i = 1; i < NUMOFSIGNALS; i++) { #ifdef SIGKILL if (i == SIGKILL) continue; #endif #ifdef SIGSTOP if (i == SIGSTOP) continue; #endif h = sys_signal(i, SIG_IGN); if (h != SIG_IGN && h != SIG_ERR) sys_signal(i, h); sighandlers[i] = h; } } rc-1.7.4/match.c0000644000175000017500000000416612507445074010327 00000000000000/* match.c: pattern matching routines */ #include "rc.h" static int rangematch(char *, char); enum { RANGE_FAIL = -1, RANGE_ERROR = -2 }; /* match() matches a single pattern against a single string. */ extern bool match(char *p, char *m, char *s) { int i, j; if (m == NULL) return streq(p, s); i = 0; while (1) { if (p[i] == '\0') return *s == '\0'; else if (m[i]) { switch (p[i++]) { case '?': if (*s++ == '\0') return FALSE; break; case '*': while (p[i] == '*' && m[i] == 1) /* collapse multiple stars */ i++; if (p[i] == '\0') /* star at end of pattern? */ return TRUE; while (*s != '\0') if (match(p + i, m + i, s++)) return TRUE; return FALSE; case '[': if (*s == '\0') return FALSE; switch (j = rangematch(p + i, *s)) { default: i += j; break; case RANGE_FAIL: return FALSE; case RANGE_ERROR: if (*s != '[') return FALSE; } s++; break; default: panic("bad metacharacter in match"); /* NOTREACHED */ return FALSE; /* hush up gcc -Wall */ } } else if (p[i++] != *s++) return FALSE; } } /* From the ed(1) man pages (on ranges): The `-' is treated as an ordinary character if it occurs first (or first after an initial ^) or last in the string. The right square bracket does not terminate the enclosed string if it is the first character (after an initial `^', if any), in the bracketed string. rangematch() matches a single character against a class, and returns an integer offset to the end of the range on success, or -1 on failure. */ static int rangematch(char *p, char c) { char *orig = p; bool neg = (*p == '~'); bool matched = FALSE; if (neg) p++; if (*p == ']') { p++; matched = (c == ']'); } for (; *p != ']'; p++) { if (*p == '\0') return RANGE_ERROR; /* bad syntax */ if (p[1] == '-' && p[2] != ']') { /* check for [..-..] but ignore [..-] */ if (c >= *p) matched |= (c <= p[2]); p += 2; } else { matched |= (*p == c); } } if (matched ^ neg) return p - orig + 1; /* skip the right-bracket */ else return RANGE_FAIL; } rc-1.7.4/rc.10000644000175000017500000013134312524740263007550 00000000000000.\" rc.1 .\"------- .\" Man page portability notes .\" .\" These are some notes on conventions to maintain for greatest .\" portability of this man page to various other versions of .\" nroff. .\" .\" When you want a \ to appear in the output, use \e in the man page. .\" (NOTE this comes up in the rc grammar, where to print out '\n' the .\" man page must contain '\en'.) .\" .\" Evidently not all versions of nroff allow the omission of the .\" terminal " on a macro argument. Thus what could be written .\" .\" .Cr "exec >[2] err.out .\" .\" in true nroffs must be written .\" .\" .Cr "exec >[2] err.out" .\" .\" instead. .\" .\" Use symbolic font names (e.g. R, I, B) instead of the standard .\" font positions 1, 2, 3. Note that for Xf to work the standard .\" font names must be single characters. .\" .\" Not all man macros have the RS and RE requests (I altered the Ds .\" and De macros and the calls to Ds accordingly). .\" .\" Thanks to Michael Haardt (u31b3hs@cip-s01.informatik.rwth-aachen.de) .\" for pointing out these problems. .\" .\" Note that sentences should end at the end of a line. nroff and .\" troff will supply the correct inter-sentence spacing, but only if .\" the sentences end at the end of a line. Explicit spaces, if given, .\" are apparently honored and the normal inter-sentence spacing is .\" suppressed. .\" .\" DaviD W. Sanderson .\"------- .\" Dd distance to space vertically before a "display" .\" These are what n/troff use for inter-paragraph distance .\"------- .if t .nr Dd .4v .if n .nr Dd 1v .\"------- .\" Ds begin a display, indented .5 inches from the surrounding text. .\" .\" Note that uses of Ds and De may NOT be nested. .\"------- .de Ds .\" .RS \\$1 .sp \\n(Ddu .in +0.5i .nf .. .\"------- .\" De end a display (no trailing vertical spacing) .\"------- .de De .fi .in .\" .RE .. .\"------- .\" I stole the Xf macro from the -man macros on my machine (originally .\" "}S", I renamed it so that it won't conflict). .\"------- .\" Set Cf to the name of the constant width font. .\" It will be "C" or "(CW", typically. .\" NOTEZ BIEN the lines defining Cf must have no trailing white space: .\"------- .if t .ds Cf C .if n .ds Cf R .\"------- .\" Rc - Alternate Roman and Courier .\"------- .de Rc .Xf R \\*(Cf \& "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" .. .\"------- .\" Ic - Alternate Italic and Courier .\"------- .de Ic .Xf I \\*(Cf \& "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" .. .\"------- .\" Bc - Alternate Bold and Courier .\"------- .de Bc .Xf B \\*(Cf \& "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" .. .\"------- .\" Cr - Alternate Courier and Roman .\"------- .de Cr .Xf \\*(Cf R \& "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" .. .\"------- .\" Ci - Alternate Courier and Italic .\"------- .de Ci .Xf \\*(Cf I \& "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" .. .\"------- .\" Cb - Alternate Courier and Bold .\"------- .de Cb .Xf \\*(Cf B \& "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" .. .\"------- .\" Xf - Alternate fonts .\" .\" \$1 - first font .\" \$2 - second font .\" \$3 - desired word with embedded font changes, built up by recursion .\" \$4 - text for first font .\" \$5 - \$9 - remaining args .\" .\" Every time we are called: .\" .\" If there is something in \$4 .\" then Call ourself with the fonts switched, .\" with a new word made of the current word (\$3) and \$4 .\" rendered in the first font, .\" and with the remaining args following \$4. .\" else We are done recursing. \$3 holds the desired output .\" word. We emit \$3, change to Roman font, and restore .\" the point size to the default. .\" fi .\" .\" Use Xi to add a little bit of space after italic text. .\"------- .de Xf .ds Xi .\"------- .\" I used to test for the italic font both by its font position .\" and its name. Now just test by its name. .\" .\" .if "\\$1"2" .if !"\\$5"" .ds Xi \^ .\"------- .if "\\$1"I" .if !"\\$5"" .ds Xi \^ .\"------- .\" This is my original code to deal with the recursion. .\" Evidently some nroffs can't deal with it. .\"------- .\" .ie !"\\$4"" \{\ .\" . Xf \\$2 \\$1 "\\$3\\f\\$1\\$4\\*(Xi" "\\$5" "\\$6" "\\$7" "\\$8" "\\$9" .\" .\} .\" .el \{\\$3 .\" . ft R \" Restore the default font, since we don't know .\" . \" what the last font change was. .\" . ps 10 \" Restore the default point size, since it might .\" . \" have been changed by an argument to this macro. .\" .\} .\"------- .\" Here is more portable (though less pretty) code to deal with .\" the recursion. .\"------- .if !"\\$4"" .Xf \\$2 \\$1 "\\$3\\f\\$1\\$4\\*(Xi" "\\$5" "\\$6" "\\$7" "\\$8" "\\$9" .if "\\$4"" \\$3\fR\s10 .. .TH RC 1 "2015-05-13" .SH NAME rc \- shell .SH SYNOPSIS .B rc .RB [ \-deiIlnopsvx ] .RB [ \-c .IR command ] .RI [ arguments ] .SH DESCRIPTION .I rc is a command interpreter and programming language similar to .IR sh (1). It is based on the AT&T Plan 9 shell of the same name. The shell offers a C-like syntax (much more so than the C shell), and a powerful mechanism for manipulating variables. It is reasonably small and reasonably fast, especially when compared to contemporary shells. Its use is intended to be interactive, but the language lends itself well to scripts. .SH OPTIONS .TP .Cr \-c If .Cr \-c is present, commands are executed from the immediately following argument. Any further arguments to .I rc are placed in .Cr $* . Thus: .Ds .Cr "rc -c 'echo $*' 1 2 3" .De .TP \& prints out .Ds .Cr "1 2 3" .De .TP .Cr \-d This flag causes .I rc not to ignore .Cr SIGQUIT or .Cr SIGTERM . Thus .I rc can be made to dump core if sent .Cr SIGQUIT . This flag is only useful for debugging .IR rc . .TP .Cr \-e If the .Cr \-e flag is present, then .I rc will exit if the exit status of a command is false (nonzero). .I rc will not exit, however, if a conditional fails, e.g., an .Cr if() command. .TP .Cr \-i If the .Cr \-i flag is present or if the input to .I rc is from a terminal (as determined by .IR isatty (3)) then .I rc will be in .I interactive mode. That is, a prompt (from .Cr $prompt(1)\^ ) will be printed before an input line is taken, and .I rc will ignore .Cr SIGINT . .TP .Cr \-I If the .Cr \-I flag is present, or if the input to .I rc is not from a terminal, then .I rc will not be in interactive mode. No prompts will be printed, and .Cr SIGINT will cause .I rc to exit. .TP .Cr \-l If the .Cr \-l flag is present, or if .IR rc 's .Cr argv[0][0] is a dash .Rc ( \- ), then .I rc will behave as a login shell. That is, it will run commands from .Cr $home/.rcrc , if this file exists, before reading any other input. .TP .Cr \-n This flag causes .I rc to read its input and parse it, but not to execute any commands. This is useful for syntax checking on scripts. If used in combination with the .Cr \-x flag, .I rc will print each command as it is parsed in a form similar to the one used for exporting functions into the environment. .TP .Cr \-o This flag prevents the usual practice of trying to open .Cr /dev/null on file descriptors 0, 1, and 2, if any of those descriptors are inherited closed. .TP .Cr \-p This flag prevents .I rc from initializing shell functions from the environment. This allows .I rc to run in a protected mode, whereby it becomes more difficult for an .I rc script to be subverted by placing false commands in the environment. (Note that the presence of this flag does .I not mean that it is safe to run setuid .I rc scripts; the usual caveats about the setuid bit still apply.) .TP .Cr \-s This flag causes .I rc to read from standard input. Any arguments are placed in .Cr $* . .TP .Cr \-v This flag causes .I rc to echo its input to standard error as it is read. .TP .Cr \-x This flag causes .I rc to print every command on standard error before it is executed. It can be useful for debugging .I rc scripts. .PP .SH COMMANDS A simple command is a sequence of words, separated by white space (space and tab) characters that ends with a newline, semicolon .Rc ( ; ), or ampersand .Rc ( & ). The first word of a command is the name of that command. If the name begins with .Cr / , .Cr ./ , or .Cr ../ , then the name is used as an absolute path name referring to an executable file. Otherwise, the name of the command is looked up in a table of shell functions, builtin commands, or as a file in the directories named by .Cr $path . .SS "Background Tasks" A command ending with .Cr & is run in the background; that is, the shell returns immediately rather than waiting for the command to complete. Background commands have .Cr /dev/null connected to their standard input unless an explicit redirection for standard input is used. .SS "Subshells" A command prefixed with an at-sign .Rc ( @ ) is executed in a subshell. This insulates the parent shell from the effects of state changing operations such as a .B cd or a variable assignment. For example: .Ds .Cr "@ {cd ..; make}" .De .PP will run .IR make (1) in the parent directory .Rc ( .. ), but leaves the shell running in the current directory. .SS "Line continuation" A long logical line may be continued over several physical lines by terminating each line (except the last) with a backslash .Rc ( \e ). The backslash-newline sequence is treated as a space. A backslash is not otherwise special to .IR rc . (In addition, inside quotes a backslash loses its special meaning even when it is followed by a newline.) .SS Quoting .IR rc interprets several characters specially; special characters automatically terminate words. The following characters are special: .Ds .Cr "# ; & | ^ $ = \` ' { } ( ) < >" .De .PP The single quote .Rc ( ' ) prevents special treatment of any character other than itself. All characters, including control characters, newlines, and backslashes between two quote characters are treated as an uninterpreted string. A quote character itself may be quoted by placing two quotes in a row. The minimal sequence needed to enter the quote character is .Cr '''' . The empty string is represented by .Cr '' . Thus: .Ds .Cr "echo 'What''s the plan, Stan?'" .De .PP prints out .Ds .Cr "What's the plan, Stan?" .De .PP The number sign .Rc ( # ) begins a comment in .IR rc . All characters up to but not including the next newline are ignored. Note that backslash continuation does not work inside a comment, i.e., the backslash is ignored along with everything else. .SS Grouping Zero or more commands may be grouped within braces .Rc (`` { '' and .Rc `` } ''), and are then treated as one command. Braces do not otherwise define scope; they are used only for command grouping. In particular, be wary of the command: .Ds .Cr "for (i) {" .Cr " command" .Cr "} | command" .De .PP Since pipe binds tighter than .Cr for , this command does not perform what the user expects it to. Instead, enclose the whole .Cr for statement in braces: .Ds .Cr "{for (i) command} | command" .De .PP Fortunately, .IR rc 's grammar is simple enough that a (confident) user can understand it by examining the skeletal .IR yacc (1) grammar at the end of this man page (see the section entitled .BR GRAMMAR ). .SS "Input and output" .PP The standard output may be redirected to a file with .Ds .Cr "command > file" .De .PP and the standard input may be taken from a file with .Ds .Cr "command < file" .De .PP Redirections can appear anywhere in the line: the word following the redirection symbol is the filename and must be quoted if it contains spaces or other special characters. These are all equivalent. .Ds .Cr "echo 1 2 3 > foo" .Cr "> foo echo 1 2 3" .Cr "echo 1 2 > foo 3" .De .PP File descriptors other than 0 and 1 may be specified also. For example, to redirect standard error to a file, use: .Ds .Cr "command >[2] file" .De .PP In order to duplicate a file descriptor, use .Ci >[ n = m ]\fR. Thus to redirect both standard output and standard error to the same file, use .Ds .Cr "command > file >[2=1]" .De .PP As in .IR sh , redirections are processed from left to right. Thus this sequence .Ds .Cr "command >[2=1] > file" .De .PP is usually a mistake. It first duplicates standard error to standard output; then redirects standard output to a file, leaving standard error wherever standard output originally was. .PP To close a file descriptor that may be open, use .Ci >[ n =]\fR. For example, to close file descriptor 7: .Ds .Cr "command >[7=]" .De .PP Note that no spaces may appear in these constructs: .Ds .Cr "command > [2] file" .De .PP would send the output of the command to a file named .Cr [2] , with the intended filename appearing in the command's argument list. .PP In order to place the output of a command at the end of an already existing file, use: .Ds .Cr "command >> file" .De .PP If the file does not exist, then it is created. .PP ``Here documents'' are supported as in .I sh with the use of .Ds .Cr "command << 'eof-marker'" .De .PP Subsequent lines form the standard input of the command, till a line containing just the marker, in this case .Cr eof-marker , is encountered. .PP If the end-of-file marker is enclosed in quotes, then no variable substitution occurs inside the here document. Otherwise, every variable is substituted by its space-separated-list value (see .BR "Flat Lists" , below), and if a .Cr ^ character follows a variable name, it is deleted. This allows the unambiguous use of variables adjacent to text, as in .Ds .Cr $variable^follow .De .PP To include a literal .Cr $ in a here document when an unquoted end-of-file marker is being used, enter it as .Cr $$ . .PP Additionally, .I rc supports ``here strings'', which are like here documents, except that input is taken directly from a string on the command line. Their use is illustrated here: .Ds .Cr "cat <<< 'this is a here string' | wc" .De .PP (This feature enables .I rc to export functions using here documents into the environment; the author does not expect users to find this feature useful.) .SS Pipes Two or more commands may be combined in a pipeline by placing the vertical bar .Rc ( \||\| ) between them. The standard output (file descriptor 1) of the command on the left is tied to the standard input (file descriptor 0) of the command on the right. The notation .Ci |[ n = m ] indicates that file descriptor .I n of the left process is connected to file descriptor .I m of the right process. .Ci |[ n ] is a shorthand for .Ci |[ n =0]\fR. As an example, to pipe the standard error of a command to .IR wc (1), use: .Ds .Cr "command |[2] wc" .De .PP As with file redirections, no spaces may occur in the construct specifying numbered file descriptors. .PP The exit status of a pipeline is considered true if and only if every command in the pipeline exits true. .SS "Commands as Arguments" Some commands, like .IR cmp (1) or .IR diff (1), take their arguments on the command line, and do not read input from standard input. It is convenient sometimes to build nonlinear pipelines so that a command like .I cmp can read the output of two other commands at once. .I rc does it like this: .Ds .Cr "cmp <{command} <{command}" .De .PP compares the output of the two commands in braces. Note: since this form of redirection is implemented with some kind of pipe, and since one cannot .IR lseek (2) on a pipe, commands that use .IR lseek (2) will hang. For example, some versions of .IR diff (1) use .IR lseek (2) on their inputs. .PP Data can be sent down a pipe to several commands using .IR tee (1) and the output version of this notation: .Ds .Cr "echo hi there | tee >{sed 's/^/p1 /'} >{sed 's/^/p2 /'}" .De .SH "CONTROL STRUCTURES" The following may be used for control flow in .IR rc : .SS "If-Else Statements" .PD 0 .sp .Ci "if (" test ") {" .br .I " cmd" .br .TP .Ci "} else " cmd The .I test is executed, and if its return status is zero, the first command is executed, otherwise the second is. Braces are not mandatory around the commands. However, an .Cr else statement is valid only if it follows a close-brace on the same line. Otherwise, the .Cr if is taken to be a simple-if: .Ds .Cr "if (test)" .Cr " command" .De .PD .SS "While and For Loops" .TP .Ci "while (" test ) " cmd" .I rc executes the .I test and performs the command as long as the .I test is true. .TP .Ci "for (" var " in " list ) " cmd" .I rc sets .I var to each element of .I list (which may contain variables and backquote substitutions) and runs .IR cmd . If .Rc `` in .IR list '' is omitted, then .I rc will set .I var to each element of .Cr $* . For example: .Ds .Cr "for (i in \`{ls -F | grep '\e*$' | sed 's/\e*$//'}) { commands }" .De .TP \& will set .Cr $i to the name of each file in the current directory that is executable. .SS "Switch" .TP .Ci "switch (" list ") { case" " ..." " }" .I rc looks inside the braces after a .Cr switch for statements beginning with the word .Cr case . If any of the patterns following .Cr case match the list supplied to .Cr switch , then the commands up until the next .Cr case statement are executed. The metacharacters .Cr "*" , .Cr [ or .Cr ? should not be quoted; matching is performed only against the strings in .IR list , not against file names. (Matching for case statements is the same as for the .Cr ~ command.) .SS "Logical Operators" There are a number of operators in .I rc which depend on the exit status of a command. .Ds .Cr "command && command" .De .PP executes the first command and then executes the second command if and only if the first command exits with a zero exit status (``true'' in Unix). .Ds .Cr "command || command" .De .PP executes the first command and then executes the second command if and only if the first command exits with a nonzero exit status (``false'' in Unix). .Ds .Cr "! command" .De .PP negates the exit status of a command. .SH "PATTERN MATCHING" There are two forms of pattern matching in .IR rc . One is traditional shell globbing. This occurs in matching for file names in argument lists: .Ds .Cr "command argument argument ..." .De .PP When the characters .Cr "*" , .Cr [ or .Cr ? occur in an argument or command, .I rc looks at the argument as a pattern for matching against files. (Contrary to the behavior other shells exhibit, .I rc will only perform pattern matching if a metacharacter occurs unquoted and literally in the input. Thus, .Ds .Cr "foo='*'" .Cr "echo $foo" .De .PP will always echo just a star. In order for non-literal metacharacters to be expanded, an .Cr eval statement must be used in order to rescan the input.) Pattern matching occurs according to the following rules: a .Cr * matches any number (including zero) of characters. A .Cr ? matches any single character, and a .Cr [ followed by a number of characters followed by a .Cr ] matches a single character in that class. The rules for character class matching are the same as those for .IR ed (1), with the exception that character class negation is achieved with the tilde .Rc ( ~ ), not the caret .Rc ( ^ ), since the caret already means something else in .IR rc . .PP .I rc also matches patterns against strings with the .Cr ~ command: .Ds .Cr "~ subject pattern pattern ..." .De .PP .Cr ~ sets .Cr $status to zero if and only if a supplied pattern matches any single element of the subject list. Thus .Ds .Cr "~ foo f*" .De .PP sets status to zero, while .Ds .Cr "~ (bar baz) f*" .De .PP sets status to one. The null list is matched by the null list, so .Ds .Cr "~ $foo ()" .De .PP checks to see whether .Cr $foo is empty or not. This may also be achieved by the test .Ds .Cr "~ $#foo 0" .De .PP Note that inside a .Cr ~ command .I rc does not match patterns against file names, so it is not necessary to quote the characters .Cr "*" , .Cr [ and .Cr "?" . However, .I rc does expand the subject against filenames if it contains metacharacters. Thus, the command .Ds .Cr "~ * ?" .De .PP returns true if any of the files in the current directory have a single-character name. If the .Cr ~ command is given a list as its first argument, then a successful match against any of the elements of that list will cause .Cr ~ to return true. For example: .Ds .Cr "~ (foo goo zoo) z*" .De .PP is true. .SH "LISTS AND VARIABLES" The primary data structure in .IR rc is the list, which is a sequence of words. Parentheses are used to group lists. The empty list is represented by .Cr "()" . Lists have no hierarchical structure; a list inside another list is expanded so the outer list contains all the elements of the inner list. Thus, the following are all equivalent .Ds .Cr "one two three" .Cr "(one two three)" .Cr "((one) () ((two three)))" .De .PP Note that the null string, .Cr "''" , and the null list, .Cr "()" , are two very different things. Assigning the null string to a variable is a valid operation, but it does not remove its definition. .Ds .Cr "null = '' empty = () echo $#null $#empty" .De .PP produces the output .Ds .Cr "1 0" .De .SS "List Concatenation" Two lists may be joined by the concatenation operator .Rc ( ^ ). Concatenation works according to the following rules: if the two lists have the same number of elements, then concatenation is pairwise: .Ds .Cr "echo (a\- b\- c\-)^(1 2 3)" .De .PP produces the output .Ds .Cr "a\-1 b\-2 c\-3" .De .PP Otherwise, at least one of the lists must have a single element, and then the concatenation is distributive: .Ds .Cr "cc \-^(O g c) (malloc alloca)^.c" .De .PP has the effect of performing the command .Ds .Cr "cc \-O \-g \-c malloc.c alloca.c" .De .PP A single word is a list of length one, so .Ds .Cr "echo foo^bar" .De .PP produces the output .Ds .Cr foobar .De .SS "Free Carets" .I rc inserts carets (concatenation operators) for free in certain situations, in order to save some typing on the user's behalf. For example, the above example could also be typed in as: .Ds .Cr "opts=(O g c) files=(malloc alloca) cc \-$opts $files.c" .De .PP .I rc takes care to insert a free-caret between the .Rc `` \- '' and .Cr "$opts" , as well as between .Cr $files and .Cr ".c" . The rule for free carets is as follows: if a word or keyword is immediately followed by another word, keyword, dollar-sign or backquote, then .I rc inserts a caret between them. .SS "Variables" A list may be assigned to a variable, using the notation: .Ds .Ic var " = " list .De .PP The special variable .Cr * may also be assigned to using this notation; .I rc has no .B set builtin. .PP Any non-empty sequence of characters, except a sequence including only digits, may be used as a variable name. Any character except .Cr = may be used, but special characters must be quoted. All user-defined variables are exported into the environment. .PP The value of a variable is referenced with the dollar .Rc ( $ ) operator: .Ds .Ci $ var .De .PP Any variable which has not been assigned a value returns the null list, .Cr "()" , when referenced. Multiple references are allowed: .Ds .Cr "a = foo" .Cr "b = a" .Cr "echo $ $ b" .De .PP prints .Ds .Cr foo .De .PP A variable's definition may also be removed by assigning the null list to a variable: .Ds .Ic var =() .De .PP For ``free careting'' to work correctly, .I rc must make certain assumptions about what characters may appear in a variable name. .I rc assumes that a variable name consists only of alphanumeric characters, underscore .Rc ( \|_\| ) and star .Rc ( * ). To reference a variable with other characters in its name, quote the variable name. Thus: .Ds .Cr "echo $'we$Ird:Variab!le'" .De .SS "Local Variables" Any number of variable assignments may be made local to a single command by typing: .Ds .Cr "a=foo b=bar ... command" .De .PP The command may be a compound command, so for example: .Ds .Cr "path=. ifs=() {" .Cr " " ... .Cr } .De .PP sets .Cr path to .Cr . and removes .Cr ifs for the duration of one long compound command. .SS "Variable Subscripts" Variables may be subscripted with the notation .Ds .Ci $var( n ) .De .PP where .I n is a list of integers (origin 1). The opening parenthesis must immediately follow the variable name. The list of subscripts need not be in order or even unique. Thus, .Ds .Cr "a=(one two three)" .Cr "echo $a(3 3 3)" .De .PP prints .Ds .Cr "three three three" .De .PP If .I n references a nonexistent element, then .Ci $var( n ) returns the null list. The notation .Ci "$" n\fR, where .I n is an integer, is a shorthand for .Ci $*( n )\fR. Thus, .IR rc 's arguments may be referred to as .Cr "$1" , .Cr "$2" , and so on. .PP Note also that the list of subscripts may be given by any of .IR rc 's list operations: .Ds .Cr "$var(\`{awk 'BEGIN{for(i=1;i<=10;i++)print i;exit; }'})" .De .PP returns the first 10 elements of .Cr $var . .PP To count the number of elements in a variable, use .Ds .Cr $#var .De .PP This returns a single-element list, with the number of elements in .Cr $var . .SS "Flat Lists" In order to create a single-element list from a multi-element list, with the components space-separated, use the dollar-caret .Rc ( $^ ) operator: .Ds .Cr $^var .De .PP This is useful when the normal list concatenation rules need to be bypassed. For example, to append a single period at the end of .Cr $path , use: .Ds .Cr "echo $^path." .De .PP For compability with the Plan 9 rc, .Ds .Cr $"var .De .PP is accepted as a synonym for dollar-caret. .SS "Backquote Substitution" A list may be formed from the output of a command by using backquote substitution: .Ds .Cr "\`{ command }" .De .PP returns a list formed from the standard output of the command in braces. .Cr $ifs is used to split the output into list elements. By default, .Cr $ifs has the value space-tab-newline. The braces may be omitted if the command is a single word. Thus .Cr \`ls may be used instead of .Cr "\`{ls}" . This last feature is useful when defining functions that expand to useful argument lists. A frequent use is: .Ds .Cr "fn src { echo *.[chy] }" .De .PP followed by .Ds .Cr "wc \`src" .De .PP (This will print out a word-count of all C source files in the current directory.) .PP In order to override the value of .Cr $ifs for a single backquote substitution, use: .Ds .Cr "\`\` (ifs-list) { command }" .De .PP .Cr $ifs will be temporarily ignored and the command's output will be split as specified by the list following the double backquote. For example: .Ds .Cr "\`\` ($nl :) {cat /etc/passwd}" .De .PP splits up .Cr /etc/passwd into fields, assuming that .Cr $nl contains a newline as its value. .SH "SPECIAL VARIABLES" Several variables are known to .I rc and are treated specially. In the following list, ``default'' indicates that .I rc gives the variable a default value on startup; ``no-export'' indicates that the variable is never exported; and ``read-only'' indicates that an attempt to set the variable will silently have no effect. .PP Also, ``alias'' means that the variable is aliased to the same name in capitals. For example, an assignment to .Cr $cdpath causes an automatic assignment to .Cr $CDPATH , and vice-versa. If .Cr $CDPATH is set when .I rc is started, its value is imported into .Cr $cdpath . .Cr $cdpath and .Cr $path are .I rc lists; .Cr $CDPATH and .Cr $PATH are colon-separated lists. Only the names spelt in capitals are exported into the environment. .TP .Cr * " (no-export)" The argument list of .IR rc . .Cr "$1, $2," etc. are the same as .Cr $*(1) , .Cr $*(2) , etc. .TP .Cr 0 " (default no-export)" The variable .Cr $0 holds the value of .Cr argv[0] with which .I rc was invoked. Additionally, .Cr $0 is set to the name of a function for the duration of the execution of that function, and .Cr $0 is also set to the name of the file being interpreted for the duration of a .Cr . command. .Cr $0 is not an element of .Cr $* , and is never treated as one. .TP .Cr apid " (no-export)" The process ID of the last process started in the background. .TP .Cr apids " (no-export read-only)" A list whose elements are the process IDs of all background processes which are still alive, or which have died and have not been waited for yet. .TP .Cr bqstatus " (no-export)" The exit status of the .I rc forked to execute the most recent backquote substitution. Note that, unlike .Cr $status , .Cr $bqstatus is always a single element list (see .BR "EXIT STATUS" below). For example: .Ds .Cr "echo foo |grep bar; whatis status" .De .TP \& prints .Ds .Cr "status=(0 1)" .De .TP \& whereas .Ds .Cr "x=`{echo foo |grep bar}; whatis bqstatus" .De .TP \& prints .Ds .Cr "bqstatus=1" .De .TP .Cr cdpath " (alias)" A list of directories to search for the target of a .B cd command. The empty string stands for the current directory. Note that if the .Cr $cdpath variable does not contain the current directory, then the current directory will not be searched; this allows directory searching to begin in a directory other than the current directory. .TP .Cr history .Cr $history contains the name of a file to which commands are appended as .I rc reads them. This facilitates the use of a stand-alone history program (such as .IR history (1)) which parses the contents of the history file and presents them to .I rc for reinterpretation. If .Cr $history is not set, then .I rc does not append commands to any file. .TP .Cr home " (alias)" The default directory for the builtin .B cd command, and the directory in which .I rc looks to find its initialization file, .Cr .rcrc , if .I rc has been started up as a login shell. .TP .Cr ifs " (default)" The internal field separator, used for splitting up the output of backquote commands for digestion as a list. On startup, .I rc assigns the list containing the characters space, tab, and newline to .Cr $ifs . .TP .Cr path " (alias)" This is a list of directories to search in for commands. The empty string stands for the current directory. If neither .Cr $PATH nor .Cr $path is set at startup time, .Cr $path assumes a default value suitable for your system. This is typically .Cr "(/usr/local/bin /usr/bin /usr/ucb /bin .)" .TP .Cr pid " (default no-export)" On startup, .Cr $pid is initialized to the numeric process ID of the currently running .IR rc . .TP .Cr prompt " (default)" This variable holds the two prompts (in list form, of course) that .I rc prints. .Cr $prompt(1) is printed before each command is read, and .Cr $prompt(2) is printed when input is expected to continue on the next line. .I rc sets .Cr $prompt to .Cr "('; ' '')" by default. The reason for this is that it enables an .I rc user to grab commands from previous lines using a mouse, and to present them to .I rc for re-interpretation; the semicolon prompt is simply ignored by .IR rc . The null .Cr $prompt(2) also has its justification: an .I rc script, when typed interactively, will not leave .Cr $prompt(2) 's on the screen, and can therefore be grabbed by a mouse and placed directly into a file for use as a shell script, without further editing being necessary. .TP .Cr prompt " (function)" If this function is defined, then it gets executed every time .I rc is about to print .Cr "$prompt(1)" . .TP .Cr status " (no-export read-only)" The exit status of the last command. If the command exited with a numeric value, that number is the status. If the command died with a signal, the status is the name of that signal; if a core file was created, the string .Rc `` +core '' is appended. The value of .Cr $status for a pipeline is a list, with one entry, as above, for each process in the pipeline. For example, the command .Ds .Cr "ls | wc" .De .TP \& usually sets .Cr $status to .Cr "(0 0)" . .TP .Cr version " (default)" On startup, the first element of this list variable is initialized to a string which identifies this version of .IR rc . The second element is initialized to a string which can be found by .IR ident (1) and the .I what command of .IR sccs (1). .SH FUNCTIONS .I rc functions are identical to .I rc scripts, except that they are stored in memory and are automatically exported into the environment. A shell function is declared as: .Ds .Cr "fn name { commands }" .De .PP .I rc scans the definition until the close-brace, so the function can span more than one line. The function definition may be removed by typing .Ds .Cr "fn name" .De .PP (One or more names may be specified. With an accompanying definition, all names receive the same definition. This is sometimes useful for assigning the same signal handler to many signals. Without a definition, all named functions are deleted.) When a function is executed, .Cr $* is set to the arguments to that function for the duration of the command. Thus a reasonable definition for .Cr "l" , a shorthand for .IR ls (1), could be: .Ds .Cr "fn l { ls -FC $* }" .De .PP but not .Ds .Cr "fn l { ls -FC } # WRONG" .De .SH "INTERRUPTS AND SIGNALS" .I rc recognizes a number of signals, and allows the user to define shell functions which act as signal handlers. .I rc by default traps .Cr SIGINT when it is in interactive mode. .Cr SIGQUIT and .Cr SIGTERM are ignored, unless .I rc has been invoked with the .Cr \-d flag. However, user-defined signal handlers may be written for these and all other signals. The way to define a signal handler is to write a function by the name of the signal in lower case. Thus: .Ds .Cr "fn sighup { echo hangup; rm /tmp/rc$pid.*; exit }" .De .PP In addition to Unix signals, .I rc recognizes the artificial signal .Cr SIGEXIT which occurs as .I rc is about to exit. .PP In order to remove a signal handler's definition, remove it as though it were a regular function. For example: .Ds .Cr "fn sigint" .De .PP returns the handler of .Cr SIGINT to the default value. In order to ignore a signal, set the signal handler's value to .Cr "{}" . Thus: .Ds .Cr "fn sigint {}" .De .PP causes .Cr SIGINT to be ignored by the shell. Only signals that are being ignored are passed on to programs run by .IR rc ; signal functions are not exported. .PP On System V-based Unix systems, .I rc will not allow you to trap .Cr SIGCLD . .SH "BUILTIN COMMANDS" Builtin commands execute in the context of the shell, but otherwise behave exactly like other commands. Although .BR ! , .B ~ and .B @ are not strictly speaking builtin commands, they can usually be used as such. .TP \&\fB.\fR [\fB\-i\fR] \fIfile \fR[\fIarg ...\fR] Reads .I file as input to .IR rc and executes its contents. With a .Cr \-i flag, input is interactive. Thus from within a shell script, .Ds .Cr ". \-i /dev/tty" .De .TP \& does the ``right thing''. .TP .B break Breaks from the innermost .Cr for or .Cr while , as in C. It is an error to invoke .B break outside of a loop. (Note that there is no .B break keyword between commands in .Cr switch statements, unlike C.) .TP \fBbuiltin \fIcommand \fR[\fIarg ...\fR] Executes the command ignoring any function definition of the same name. This command is present to allow functions with the same names as builtins to use the underlying builtin or binary. For example: .Ds .Cr "fn ls { builtin ls -FC $* }" .De .TP \& is a reasonable way to pass a default set of arguments to .Cr ls (1), whereas .Ds .Cr "fn ls { ls -FC $* } # WRONG" .De .TP \& is a non-terminating recursion, which will cause .Cr rc to exhaust its stack space and (eventually) terminate if it is executed. .TP \fBcd \fR[\fIdirectory\fR] Changes the current directory to .IR directory . The variable .Cr $cdpath is searched for possible locations of .IR directory , analogous to the searching of .Cr $path for executable files. With no argument, .B cd changes the current directory to .Cr "$home" . .TP \fBecho \fR[\fB\-n\fR] [\fB\-\|\-\fR] [\fIarg ...\fR] Prints its arguments to standard output, terminated by a newline. Arguments are separated by spaces. If the first argument is .Cr "\-n" no final newline is printed. If the first argument is .Cr "\-\|\-" , then all other arguments are echoed literally. This is used for echoing a literal .Cr "\-n" . .TP \fBeval \fR[\fIlist\fR] Concatenates the elements of .I list with spaces and feeds the resulting string to .I rc for re-scanning. This is the only time input is rescanned in .IR rc . .TP \fBexec \fR[\fIarg ...\fR] Replaces .I rc with the given command. If the exec contains only redirections, then these redirections apply to the current shell and the shell does not exit. For example, .Ds .Cr "exec >[2] err.out" .De .TP \& places further output to standard error in the file .IR err.out . .TP \fBexit \fR[\fIstatus\fR] Cause the current shell to exit with the given exit .IR status . If no argument is given, the current value of .Cr $status is used. .TP \fBlimit \fR[\fB\-h\fR] [\fIresource \fR[\fIvalue\fR]] Similar to the .IR csh (1) .B limit builtin, this command operates upon the BSD-style resource limits of a process. The .Cr \-h flag displays/alters the hard limits. The resources which can be shown or altered are .BR cputime , .BR filesize , .BR datasize , .BR stacksize , .BR coredumpsize , .BR memoryuse , and, where supported, .BR descriptors , .BR memoryuse , .BR memoryrss , .BR maxproc , .BR memorylocked , and .BR filelocks . For example: .Ds .Cr "limit coredumpsize 0" .De .TP \& disables core dumps. To set a soft limit equal to the hard limit: .Ds .Cr "limit `{limit -h datasize}" .De .TP .B newpgrp Puts .I rc into a new process group. This builtin is useful for making .I rc behave like a job-control shell in a hostile environment. One example is the NeXT Terminal program, which implicitly assumes that each shell it forks will put itself into a new process group. .TP \fBreturn \fR[\fIn\fR] Returns from the current function, with status .IR n , where .IR n is a valid exit status, or a list of them. Thus it is legal to have .Ds .Cr "return (sigpipe 1 2 3)" .De .TP \& (This is commonly used to allow a function to return with the exit status of a previously executed pipeline of commands.) If .IR n is omitted, then .Cr $status is left unchanged. It is an error to invoke .B return when not inside a function. .TP \fBshift \fR[\fIn\fR] Deletes .I n elements from the beginning of .Cr $* and shifts the other elements down by .IR n . .I n defaults to 1. .TP \fBumask \fR[\fImask\fR] Sets the current umask (see .IR umask (2)) to the octal .IR mask . If no argument is present, the current mask value is printed. .TP \fBwait \fR[\fIpid\fR] Waits for process with the specified .IR pid , which must have been started by .IR rc , to exit. If no .I pid is specified, .I rc waits for all its child processes to exit. .TP \fBwhatis \fR[\fB\-b\fR] \fR[\fB\-f\fR] \fR[\fB\-p\fR] \fR[\fB\-s\fR] \fR[\fB\-v\fR] [\fB\-\|\-\fR] [\fIname ...\fR] Prints a definition of the named objects. For builtins, .Cr builtin .I foo is printed; for functions, including signal handlers, their definitions are printed; for executable files, path names are printed; and for variables, their values are printed. The flags restrict output to builtins, functions, executable programs, signal handlers, and variables, respectively. If no .IR name s are specified, .I rc lists all objects of that type. (This is not permitted for .Cr \-p .) Without arguments, .Cr whatis is equivalent to .Cr "whatis -fv" , and prints the values of all shell variables and functions. .TP \& Note that .B whatis output is suitable for input to .IR rc ; by saving the output of .B whatis in a file, it should be possible to recreate the state of .I rc by sourcing this file with a .Cr . command. Another note: .Cr "whatis -s > file" cannot be used to store the state of .IR rc 's signal handlers in a file, because builtins with redirections are run in a subshell, and .I rc always restores signal handlers to their default value after a .Cr fork() . .TP \& Since .B whatis uses .IR getopt (3) to parse its arguments, you can use the special argument .Cr "\-\|\-" to terminate its flags. This allows you to use names beginning with a dash, such as the .IR history (1) commands. For example, .Ds .Cr "whatis \-\|\- \-p" .De .SH EXAMPLES The .B shift builtin only shifts .Cr "$*" . This function can shift any variable (except .Cr "$lshift" ). .Ds .Cr "fn lshift { lshift=$*; *=$$1; shift $lshift(2); $lshift(1)=$* }" .De .PP With this definition in place, .Ds .Cr "walrus = (shoes ships sealing-wax cabbages kings)" .Cr "lshift walrus 3" .Cr "whatis walrus" .De .PP prints .Ds .Cr "walrus=(cabbages kings)" .De .PP The .Cr $^var operator flattens a list by separating each element with a space. This function allows the separator to be an arbitrary string. .Ds .Cr "fn lflat {" .Cr " lflat=$*; *=$$1" .Cr " while () {" .Cr " echo -n $1; shift" .Cr " ~ $#* 0 && break" .Cr " echo -n $lflat(2)" .Cr "}" .De .PP With this definition in place, .Ds .Cr "hops=(uunet mcvax ukc tlg)" .Cr "lflat hops !" .De .PP prints (with no final newline) .Ds .Cr uunet!mcvax!ukc!tlg .De .SH "EXIT STATUS" The exit status of .I rc is normally the same as that of the last command executed. If the last command was a pipeline, .I rc exits .Cr 0 if every command in the pipeline did; otherwise it exits .Cr 1 . .PP .I rc can be made to exit with a particular status using the .B exit builtin. .SH GRAMMAR Here is .IR rc 's grammar, edited to remove semantic actions. .Ds .ft \*(Cf %term ANDAND BACKBACK BANG CASE COUNT DUP ELSE END FLAT FN FOR IF IN %term OROR PIPE REDIR SUB SUBSHELL SWITCH TWIDDLE WHILE WORD HUH %left WHILE ')' ELSE %left ANDAND OROR '\en' %left BANG SUBSHELL %left PIPE %right '$' %left SUB %start rc %% rc: line end | error end end: END /* EOF */ | '\en' cmdsa: cmd ';' | cmd '&' line: cmd | cmdsa line body: cmd | cmdsan body cmdsan: cmdsa | cmd '\en' brace: '{' body '}' paren: '(' body ')' assign: first '=' word epilog: /* empty */ | redir epilog redir: DUP | REDIR word case: CASE words ';' | CASE words '\en' cbody: cmd | case cbody | cmdsan cbody iftail: cmd %prec ELSE | brace ELSE optnl cmd cmd : /* empty */ %prec WHILE | simple | brace epilog | IF paren optnl iftail | FOR '(' word IN words ')' optnl cmd | FOR '(' word ')' optnl cmd | WHILE paren optnl cmd | SWITCH '(' word ')' optnl '{' cbody '}' | TWIDDLE optcaret word words | cmd ANDAND optnl cmd | cmd OROR optnl cmd | cmd PIPE optnl cmd | redir cmd %prec BANG | assign cmd %prec BANG | BANG optcaret cmd | SUBSHELL optcaret cmd | FN words brace | FN words optcaret: /* empty */ | '^' simple: first | simple word | simple redir first: comword | first '^' sword sword: comword | keyword word: sword | word '^' sword comword: '$' sword | '$' sword SUB words ')' | COUNT sword | FLAT sword | '`' sword | '`' brace | BACKBACK word brace | BACKBACK word sword | '(' words ')' | REDIR brace | WORD keyword: FOR | IN | WHILE | IF | SWITCH | FN | ELSE | CASE | TWIDDLE | BANG | SUBSHELL words: /* empty */ | words word optnl: /* empty */ | optnl '\en' .ft R .De .SH FILES .Cr $HOME/.rcrc , .Cr /tmp/rc* , .Cr /dev/null .SH CREDITS .I rc was written by Byron Rakitzis, with valuable help from Paul Haahr, Hugh Redelmeier and David Sanderson. The design of this shell was copied from the .I rc that Tom Duff wrote at Bell Labs. .SH BUGS There is a compile-time limit on the number of .Cr ; separated commands in a line: usually 500. This is sometimes a problem for automatically generated scripts: substituting the newline character for .Cr ; avoids the limit. .PP On modern systems that support .Cr /dev/fd or .Cr /proc/self/fd , .Cr <{foo} style redirection is implemented that way. However, on older systems it is implemented with named pipes. Allegedly, it is sometimes possible to foil .I rc into removing the FIFO it places in .Cr /tmp prematurely, or it is even possible to cause .I rc to hang. (The current maintainer has never seen this, but then he doesn't use systems which lack .Cr /dev/fd any more. If anybody can reproduce this problem, please let the maintainer know.) .PP The .B echo command does not need to be a builtin. It is one for reasons of performance and portability (of .I rc scripts). .PP There should be a way to avoid exporting a variable. .PP Extra parentheses around a .Cr ~ expression or a .Cr ! expression are a syntax error. Thus, this code is illegal. .Ds .Cr "while ((~ $1 -*) && (! ~ $1 --)) { ..." .De .TP The redundant inner parentheses must be omitted. .PP Variable subscripting cannot be used in here documents. .PP The .Cr limit builtin silently ignores extra arguments. .PP Backquote substitution never produces empty strings - multiple consecutive occurrences of the separator are treated the same as a single occurrence. .Ds .Cr "ifs=! { x = `{echo -n a!!b}; whatis x }" .Cr "x=(a b) # NOT x=(a '' b)" .PP Bug reports should be mailed to .Cr "" . .SH INCOMPATIBILITIES Here is a list of features which distinguish this incarnation of .I rc from the one described in the Bell Labs manual pages: .PP The Tenth Edition .I rc does not have the .B else keyword. Instead, .B if is optionally followed by an .B "if not" clause which is executed if the preceding .B if test does not succeed. .PP Backquotes are slightly different in Tenth Edition .IR rc : a backquote must always be followed by a left-brace. This restriction is not present for single-word commands in this .IR rc . .PP For .Cr . .IR file , the Tenth Edition .IR rc searches .Cr $path for .IR file . This .I rc does not, since it is not considered useful. .PP The list flattening operator, .Cr $^foo , is spelt .Cr "$""foo" in those versions of the Bell Labs .IR rc which have it. .PP The following are all new with this version of .IR rc : The .Cr \-n flag, here strings (they facilitate exporting of functions with here documents into the environment), the .B return and .B break keywords, the .B echo builtin, the .Cr bqstatus and .Cr version variables, the support for the GNU .IR readline (3) library, and the support for the .Cr prompt function. This .I rc also sets .Cr $0 to the name of a function being executed/file being sourced. .SH "SEE ALSO" ``rc \(em A Shell for Plan 9 and UNIX Systems'', Unix Research System, Tenth Edition, Volume 2. (Saunders College Publishing) .PP .Cr http://static.tobold.org/rc/rc-duff.html , an updated version of the above paper. .PP .IR history (1) rc-1.7.4/lex.c0000644000175000017500000002636712515531750010026 00000000000000/* lex.c: rc's lexical analyzer */ #include "rc.h" #include "input.h" #include "parse.h" /* Special characters (i.e., "non-word") in rc: \t \n # ; & | ^ $ = ~ ` ' { } @ ! ( ) < > \ The lexical analyzer is fairly straightforward. The only really unclean part concerns backslash continuation and "double backslashes". A backslash followed by a newline is treated as a space, otherwise backslash is not a special character (i.e., it can be part of a word). This introduces a host of unwanted special cases. In our case, \ cannot be a word character, since we wish to read in all word characters in a tight loop. Note: to save the trouble of declaring these arrays with TRUEs and FALSEs, I am assuming that FALSE = 0, TRUE = 1. (and so is it declared in rc.h) */ #define BUFSIZE ((size_t) 1000) /* malloc hates power of 2 buffers? */ #define BUFMAX (8 * BUFSIZE) /* How big the buffer can get before we re-allocate the space at BUFSIZE again. Premature optimization? Maybe. */ typedef enum wordstates { NW, RW, KW /* "nonword", "realword", "keyword" */ } wordstates; static void getpair(int); int lineno; /* lookup table for non-word characters */ const char nw[] = { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; /* lookup table for non-word characters in variable names */ const char dnw[] = { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }; /* lookup table for quotable characters: nw + glob metachars */ const char q[] = { 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; static size_t bufsize = BUFSIZE; static char *realbuf = NULL; static bool newline = FALSE; static bool errset = FALSE; static bool prerror = FALSE; static wordstates w = NW; static int fd_left, fd_right; #define checkfreecaret {if (w != NW) { w = NW; ugchar(c); return '^'; }} enum filedescriptors { UNSET = -9, CLOSED = -1 }; /* does this string require quoting? */ extern bool quotep(char *s, bool dollar) { unsigned char c; const char *meta; meta = dollar ? dnw : q; while ((c = *s++)) if (meta[c]) return TRUE; return FALSE; } extern int yylex() { static bool dollar = FALSE; bool saw_meta = FALSE; int c; size_t i; /* The purpose of all these local assignments is to */ const char *meta; /* allow optimizing compilers like gcc to load these */ char *buf = realbuf; /* values into registers. On a sparc this is a */ YYSTYPE *y = &yylval; /* win, in code size *and* execution time */ if (errset) { errset = FALSE; return '\n'; } /* rc variable-names may contain only alnum, '*' and '_', so use dnw if we are scanning one. */ meta = (dollar ? dnw : nw); if (newline) { --lineno; /* slight space optimization; nextline() always increments lineno */ nextline(); newline = FALSE; } top: while ((c = gchar()) == ' ' || c == '\t') w = NW; if (c != '(') dollar = FALSE; if (c == EOF) return END; if (!meta[(unsigned char) c]) { /* it's a word or keyword. */ checkfreecaret; w = RW; i = 0; read: do { buf[i++] = c; if (c == '?' || c == '[' || c == '*') saw_meta = TRUE; if (i >= bufsize) buf = realbuf = erealloc(buf, bufsize *= 2); } while ((c = gchar()) != EOF && !meta[(unsigned char) c]); while (c == '\\') { if ((c = gchar()) == '\n') { nextline(); c = ' '; /* Pretend a space was read */ break; } else { bs: if (meta != dnw) { /* all words but varnames may have a bslash */ buf[i++] = '\\'; if (i >= bufsize) buf = realbuf = erealloc(buf, bufsize *= 2); if (!meta[(unsigned char) c]) goto read; } else { ugchar(c); c = '\\'; break; } } } ugchar(c); buf[i] = '\0'; w = KW; if (i == 2) { if (*buf == 'i' && buf[1] == 'f') return IF; if (*buf == 'f' && buf[1] == 'n') return FN; if (*buf == 'i' && buf[1] == 'n') return IN; } if (streq(buf, "for")) return FOR; if (streq(buf, "else")) return ELSE; if (streq(buf, "switch")) return SWITCH; if (streq(buf, "while")) return WHILE; if (streq(buf, "case")) return CASE; w = RW; y->word.w = ncpy(buf); if (saw_meta) { char *r, *s; y->word.m = nalloc(strlen(buf) + 1); for (r = buf, s = y->word.m; *r != '\0'; r++, s++) *s = (*r == '?' || *r == '[' || *r == '*'); } else { y->word.m = NULL; } y->word.q = FALSE; return WORD; } if (c == '`' || c == '!' || c == '@' || c == '~' || c == '$' || c == '\'') { checkfreecaret; if (c == '!' || c == '@' || c == '~') w = KW; } switch (c) { case '!': return BANG; case '@': return SUBSHELL; case '~': return TWIDDLE; case '`': c = gchar(); if (c == '`') return BACKBACK; ugchar(c); return '`'; case '$': dollar = TRUE; c = gchar(); if (c == '#') return COUNT; if (c == '^' || c == '"') return FLAT; ugchar(c); return '$'; case '\'': w = RW; i = 0; /* double ' to quote it, like this: 'how''s it going?' */ while ((c = gchar()) != '\'' || (c = gchar()) == '\'') { buf[i++] = c; if (c == '\n') nextline(); if (c == EOF) { w = NW; scanerror("eof in quoted string"); return HUH; } if (i >= bufsize) buf = realbuf = erealloc(buf, bufsize *= 2); } ugchar(c); buf[i] = '\0'; y->word.w = ncpy(buf); y->word.m = NULL; y->word.q = TRUE; return WORD; case '\\': if ((c = gchar()) == '\n') { nextline(); goto top; /* Pretend it was just another space. */ } ugchar(c); c = '\\'; checkfreecaret; c = gchar(); i = 0; goto bs; case '(': if (w == RW) /* SUB's happen only after real words, not keywords, so if () and while () work */ c = SUB; w = NW; return c; case '#': while ((c = gchar()) != '\n') /* skip comment until newline */ if (c == EOF) return END; /* FALLTHROUGH */ case '\n': lineno++; newline = TRUE; /* FALLTHROUGH */ case ';': case '^': case ')': case '=': case '{': case '}': w = NW; return c; case '&': w = NW; c = gchar(); if (c == '&') return ANDAND; ugchar(c); return '&'; case '|': w = NW; c = gchar(); if (c == '|') return OROR; getpair(c); if (errset) return HUH; if ((y->pipe.left = fd_left) == UNSET) y->pipe.left = 1; /* default to fd 1 */ if ((y->pipe.right = fd_right) == UNSET) y->pipe.right = 0; /* default to fd 0 */ if (y->pipe.right == CLOSED) { scanerror("expected digit after '='"); /* can't close a pipe */ return HUH; } return PIPE; case '>': c = gchar(); if (c == '>') { c = gchar(); y->redir.type = rAppend; } else y->redir.type = rCreate; y->redir.fd = 1; goto common; case '<': c = gchar(); if (c == '<') { c = gchar(); if (c == '<') { c = gchar(); y->redir.type = rHerestring; } else { y->redir.type = rHeredoc; } } else y->redir.type = rFrom; y->redir.fd = 0; common: w = NW; getpair(c); if (errset) return HUH; if (fd_right == UNSET) { /* redirection, not dup */ if (fd_left != UNSET) { y->redir.fd = fd_left; return SREDIR; } return (y->redir.type == rFrom || y->redir.type == rCreate) ? REDIR : SREDIR; } else { /* dup; recast yylval */ y->dup.type = y->redir.type; y->dup.left = fd_left; y->dup.right = fd_right; return DUP; } default: w = NW; return c; /* don't know what it is, let yacc barf on it */ } } extern void yyerror(const char *s) { char *tok; if (prerror) { /* don't print "syntax error" if there's a more informative scanerror */ prerror = FALSE; return; } if (!interactive) { if (w != NW) tok = realbuf; else if (lastchar == EOF) tok = "eof"; else if (lastchar == '\n') tok = "end of line"; else tok = nprint((lastchar < 32 || lastchar > 126) ? "(decimal %d)" : "'%c'", lastchar); fprint(2, "rc: line %d: %s near %s\n", lineno - (lastchar == '\n'), s, tok); } else fprint(2, "rc: %s\n", s); } extern void scanerror(char *s) { skiptonl(); /* flush up to newline */ yyerror(s); errset = prerror = TRUE; } extern void inityy() { newline = FALSE; w = NW; hq = NULL; /* return memory to the system if the buffer got too large */ if (bufsize > BUFMAX && realbuf != NULL) { efree(realbuf); bufsize = BUFSIZE; realbuf = ealloc(bufsize); } else if (realbuf == NULL) realbuf = ealloc(bufsize); } /* Scan in a pair of integers for redirections like >[2=1]. CLOSED represents a closed file descriptor (i.e., >[2=]) and UNSET represents an undesignated file descriptor (e.g., >[2] is represented as (2,UNSET). This function makes use of unsigned compares to make range tests in one compare operation. */ static void getpair(int c) { int n; fd_left = fd_right = UNSET; if (c != '[') { ugchar(c); return; } if ((unsigned int) (n = gchar() - '0') > 9) { scanerror("expected digit after '['"); return; } while ((unsigned int) (c = gchar() - '0') <= 9) n = n * 10 + c; fd_left = n; c += '0'; switch (c) { default: scanerror("expected '=' or ']' after digit"); return; case ']': return; case '=': if ((unsigned int) (n = gchar() - '0') > 9) { if (n != ']' - '0') { scanerror("expected digit or ']' after '='"); return; } fd_right = CLOSED; } else { while ((unsigned int) (c = gchar() - '0') <= 9) n = n * 10 + c; if (c != ']' - '0') { scanerror("expected ']' after digit"); return; } fd_right = n; } } } rc-1.7.4/getopt.c0000644000175000017500000000217712507445074010535 00000000000000#include "rc.h" int rc_opterr = 1; int rc_optind = 1; int rc_optopt; char *rc_optarg; /* getopt routine courtesy of David Sanderson */ extern int rc_getopt(int argc, char **argv, char *opts) { static int sp = 1; int c; char *cp; if (rc_optind == 0) /* reset rc_getopt() */ rc_optind = sp = 1; if (sp == 1) { if (rc_optind >= argc || argv[rc_optind][0] != '-' || argv[rc_optind][1] == '\0') { return -1; } else if (strcmp(argv[rc_optind], "--") == 0) { rc_optind++; return -1; } } rc_optopt = c = argv[rc_optind][sp]; if (c == ':' || (cp=strchr(opts, c)) == 0) { fprint(2, "%s: bad option: -%c\n", argv[0], c); if (argv[rc_optind][++sp] == '\0') { rc_optind++; sp = 1; } return '?'; } if (*++cp == ':') { if (argv[rc_optind][sp+1] != '\0') { rc_optarg = &argv[rc_optind++][sp+1]; } else if (++rc_optind >= argc) { fprint(2, "%s: option requires an argument -- %c\n", argv[0], c); sp = 1; return '?'; } else rc_optarg = argv[rc_optind++]; sp = 1; } else { if (argv[rc_optind][++sp] == '\0') { sp = 1; rc_optind++; } rc_optarg = NULL; } return c; } rc-1.7.4/configure.ac0000644000175000017500000001570712524740201011345 00000000000000dnl Our package name, version, ... AC_INIT([rc], [1.7.4]) dnl ... and release date RELDATE=`date -I` AC_DEFINE_UNQUOTED(RELDATE, "$RELDATE", [Release date]) dnl Get things going... AC_CONFIG_SRCDIR([rc.h]) AM_INIT_AUTOMAKE AC_CONFIG_HEADERS(config.h) dnl Find a standard C compiler AC_PROG_CC dnl If we're using gcc, specify `-Wall'. I've also checked the code dnl with `-pedantic -W -Wall -Wpointer-arith -Wstrict-prototypes dnl -Wmissing-prototypes', and checked that all the warnings generated dnl are harmless. case "$GCC" in yes) CFLAGS="-Wall $CFLAGS" ;; esac AC_SYS_LARGEFILE AC_PROG_CPP AC_CHECK_PROGS(LN, ln cp) AC_CHECK_HEADERS(sys/resource.h sys/time.h sys/types.h unistd.h) AC_HEADER_DIRENT AC_HEADER_STDC AC_HEADER_SYS_WAIT AC_TYPE_GETGROUPS AC_TYPE_PID_T AC_TYPE_SIZE_T AC_TYPE_UID_T AC_CHECK_TYPE(ssize_t, long) AC_CHECK_FUNCS(getgroups lstat setpgrp setrlimit sigaction) dnl We prefer system calls that don't restart. If we have sigaction() dnl we'll use it. Otherwise, we check whether good ol' signal() dnl produces interruptible system calls. case "$ac_cv_func_sigaction" in no) AC_SYS_RESTARTABLE_SYSCALLS ;; esac AM_CONDITIONAL(AMC_RESTART, test "$ac_cv_sys_restartable_syscalls" = yes) RC_FUNC_GETGROUPS RC_FUNC_SIGSETJMP AC_FUNC_SETPGRP RC_FUNC_STRERROR RC_NEED_KERNEL RC_TYPE_RLIM_T RC_TYPE_SIG_ATOMIC_T RC_SYS_V_SIGCLD dnl Does the kernel handle `#! /interpreter'? AC_SYS_INTERPRETER case "$ac_cv_sys_interpreter" in yes) AC_DEFINE(HASH_BANG, 1, [Define to 1 if your kernel understands `#!' magic numbers]) ;; esac AM_CONDITIONAL(AMC_NO_HASHBANG, test "$ac_cv_sys_interpreter" = no) dnl What do we do for command arguments? We want /dev/fd or Linux's dnl /proc/self/fd. Failing that, we'll try for POSIX mkfifo(), or a dnl mknod() that makes FIFOs. RC_SYS_DEV_FD case "$rc_cv_sys_dev_fd" in yes) AC_DEFINE(HAVE_DEV_FD, 1, [Define to 1 if you have /dev/fd.]) ;; odd) AC_DEFINE(HAVE_PROC_SELF_FD, 1, [Define to 1 if you have /proc/self/fd.]) ;; no) AC_CHECK_FUNCS(mkfifo) ;; esac case "$ac_cv_func_mkfifo" in yes) AC_DEFINE(HAVE_FIFO, 1, [Define to 1 if you have the `mkfifo' function.]) ;; no) RC_SYS_MKNOD_FIFO ;; esac dnl Now handle arguments. AC_ARG_ENABLE(builtin-echo, [ --disable-builtin-echo Don't include `echo' as a builtin], test "x$enableval" != "xno" && AC_DEFINE(RC_ECHO, 1, [Define to 1 to include `echo' as a builtin.]), AC_DEFINE(RC_ECHO)) AC_ARG_ENABLE(job, [ --disable-job Don't do job-control-style backgrounding], test "x$enableval" != "xno" && AC_DEFINE(RC_JOB, 1, [Define to 1 to use job-control-style backgrounding.]), AC_DEFINE(RC_JOB)) AC_ARG_ENABLE(protect-env, [ --disable-protect-env Don't protect environment names], test "x$enableval" != "xno" && AC_DEFINE(PROTECT_ENV, 1, [Define to 1 to encode exported environment names.]), AC_DEFINE(PROTECT_ENV)) AC_ARG_ENABLE(def-interp, [ --enable-def-interp=/bin/foo Use /bin/foo as default interpreter [[/bin/sh]]], [ case "$enableval" in no) ;; yes) AC_DEFINE(DEFAULTINTERP, "/bin/sh", [The default interpreter]) ;; *) AC_DEFINE_UNQUOTED(DEFAULTINTERP, "$enableval") esac ], AC_DEFINE(DEFAULTINTERP, "/bin/sh")) AC_ARG_ENABLE(def-path, [ --enable-def-path=\"/usr/local/bin/\",\"/usr/bin\" Default path [[All of these that exist (/usr/local/bin /usr/bin /usr/bsd /usr/ucb /bin .)]]], [ case "$enableval" in no|yes) ;; *) AC_DEFINE_UNQUOTED(DEFAULTPATH, $enableval, [The default path]) ;; esac ], enable_def_path=yes) case "$enable_def_path" in yes) AC_CACHE_CHECK(extant directories for default path, rc_cv_def_path,[ rc_cv_def_path='' for i in /usr/local/bin /usr/bin /usr/bsd /usr/ucb /bin .; do if test -d $i; then case "$rc_cv_def_path" in '') rc_cv_def_path=\"$i\" ;; *) rc_cv_def_path=$rc_cv_def_path,\"$i\" ;; esac fi done ]) AC_DEFINE_UNQUOTED(DEFAULTPATH, $rc_cv_def_path) ;; esac AC_ARG_WITH(history, [ --with-history Build history subprograms],[ case "$withval" in yes) rc_history=yes ;; *) rc_history=no ;; esac ], rc_history=no) AM_CONDITIONAL(AMC_HISTORY, test "$rc_history" = yes) AC_ARG_WITH(addon, [ --with-addon[[=foo.c]] Extra builtins, from addon.c by default ],[ case "$withval" in yes) ADDON=addon.o ;; no) ADDON='' ;; *) ADDON=`echo $withval |sed 's/\.c$/\.o/'` ;; esac ]) AM_CONDITIONAL(AMC_ADDON, test "$ADDON" != "") case "$ADDON" in ?*) AC_DEFINE(RC_ADDON, 1, [Define to 1 to use addon functions.]) ;; esac AC_SUBST(ADDON) EDIT=edit-null.o AC_ARG_WITH(edit, [ --with-edit=(edit,editline,readline,vrl) Command line editing library], [ case $withval in yes) AC_MSG_ERROR(must specify which library) # might consider searching ;; no|null) ;; edit|bsd) EDIT=edit-edit.o RC_LIB_TGETENT AC_CHECK_LIB(edit, el_init, [ LIBS="$LIBS -ledit $rc_lib_tgetent" ], AC_MSG_ERROR(edit library not found), $rc_lib_tgetent) ;; editline) EDIT=edit-editline.o RC_LIB_TGETENT AC_CHECK_LIB(editline, el_ring_bell, [ LIBS="$LIBS -leditline $rc_lib_tgetent" ], AC_MSG_ERROR(editline library not found), $rc_lib_tgetent) ;; readline|gnu) EDIT=edit-readline.o RC_LIB_TGETENT AC_CHECK_LIB(readline, readline, [ LIBS="$LIBS -lreadline $rc_lib_tgetent" ], AC_MSG_ERROR(readline library not found), $rc_lib_tgetent) AC_TRY_LINK([ #include #include ], [ rl_catch_signals = 0; ], [], AC_MSG_ERROR(readline >= 4.0 not found)) ;; vrl) EDIT=edit-vrl.o RC_LIB_TGETENT AC_CHECK_LIB(vrl, iline_peekch, [ LIBS="$LIBS -lvrl $rc_lib_tgetent" ], AC_MSG_ERROR(vrl library not found), $rc_lib_tgetent) ;; *) AC_MSG_ERROR(unknown editing library $withval) ;; esac ]) AC_SUBST(EDIT) dnl AC_CHECK_LIB(edit, readline, dnl AC_DEFINE(EDITLINE, 1, [Define to 1 if you are using `editline' or `vrl'.]) LIBS="$LIBS -ledit", dnl AC_MSG_ERROR(editline library not found))) dnl if test "${with_vrl+set}" = set -o "${with_readline+set}" = set; then dnl RC_LIB_TGETENT dnl fi dnl AC_ARG_WITH(vrl, [ --with-vrl Gert-Jan Vons's line editing], dnl AC_CHECK_LIB(vrl, readline, dnl AC_DEFINE(EDITLINE) LIBS="$LIBS -lvrl $rc_lib_tgetent", dnl AC_MSG_ERROR(vrl library not found), $rc_lib_tgetent)) dnl There are (at least) two incompatible versions of readline, and we dnl need to know which one we are using. We don't support readline 2.0. dnl AC_ARG_WITH(readline, [ --with-readline Bloated GNU line editing], [ dnl AC_CHECK_LIB(readline, readline, [ dnl AC_DEFINE(READLINE, 1, [Define to 1 if you are using GNU `readline'.]) dnl LIBS="$LIBS -lreadline $rc_lib_tgetent" dnl AC_CHECK_LIB(readline, _rl_clean_up_for_exit, , AC_DEFINE(READLINE_OLD, 1, [Define to 1 for older versions GNU `readline'.]), $rc_lib_tgetent) dnl ], AC_MSG_ERROR(readline library not found), $rc_lib_tgetent) dnl ]) dnl AM_CONDITIONAL(AMC_READLINE, test "${with_readline+set}" = set) dnl For some reason CPPFLAGS doesn't get propagated. dnl AC_SUBST(CPPFLAGS) AC_OUTPUT(Makefile) rc-1.7.4/AUTHORS0000644000175000017500000000423612515531750010131 00000000000000The current maintainer of rc is Toby Goodwin . Please send all bug reports to him, or via github: https://github.com/rakitzis/rc/issues This shell was written by me, Byron Rakitzis, but kudos go to Paul Haahr for letting me know what a shell should do and for contributing certain bits and pieces to rc (notably the limits code, print.c, most of which.c and the backquote redirection code), and to Hugh Redelmeier for running rc through his fussy ANSI compiler and thereby provoking interesting discussions about portability, and also for providing many valuable suggestions for improving rc's code in general. Finally, many thanks go to David Sanderson, for reworking the man page to format well with troff, and for providing many suggestions both for rc and its man page. Thanks to Boyd Roberts for the original history.c, and to Hugh again for re-working parts of that code. Of course, without Tom Duff's design of the original rc, I could not have written this shell (though I probably would have written *a* shell). Almost all of the features, with minor exceptions, have been implemented as described in the Unix v10 manuals. Hats off to td for designing a C-like, minimal but very useful shell. Tom Duff has kindly given permission for the paper he wrote for UKUUG to be distributed with this version of rc (called "plan9.ps" in the same FTP or HTTP directory as the shell). Please read this paper bearing in mind that it describes a program that was written at AT&T and that the version of rc presented here differs in some respects. Toby would like to thank these people for their contributions since he took over maintenance of rc. Aharon Robbins, Arvid Requate, Bengt Kleberg, Brynjulv Hauksson, Byron Rakitzis, Callum Gibson, Chris Siebenmann, Christian Neukirchen, Dale Scheetz, Dan Moniz, David Luyer, David Swasey, Decklin Foster, Donn Cave, Erik Quanstrom, Gary Carvell, Gerry Tomlinson, Gert-Jan Vons, Ian Lance Taylor, Jakub Wilk, Jeremy Fitzhardinge, Marc Moorcroft, Mark H Wilkinson, Mark K Gardner, Raymond Venneker, Rich $alz, Rob Savoye, Scott Schwartz, Stefan Dalibor, Steve Simon, Thomas Nordin, Tom Culliton, Tom Tromey, Vincent Broman, Wolfgang Zekoll. rc-1.7.4/glom.c0000644000175000017500000002173512507445074010172 00000000000000/* glom.c: builds an argument list out of words, variables, etc. */ #include "rc.h" #include #include #include static List *backq(Node *, Node *); static List *bqinput(List *, int); static List *count(List *); static List *mkcmdarg(Node *); Rq *redirq = NULL; extern List *word(char *w, char *m) { List *s = NULL; if (w != NULL) { s = nnew(List); s->w = w; s->m = m; s->n = NULL; } return s; } /* Append list s2 to list s1 by copying s1 and making the new copy point at s2. */ extern List *append(List *s1, List *s2) { List *r, *top; if (s1 == NULL) return s2; if (s2 == NULL) return s1; for (r = top = nnew(List); 1; r = r->n = nnew(List)) { r->w = s1->w; r->m = s1->m; if ((s1 = s1->n) == NULL) break; } r->n = s2; return top; } extern List *concat(List *s1, List *s2) { int n1, n2; List *r, *top; if (s1 == NULL) return s2; if (s2 == NULL) return s1; if ((n1 = listnel(s1)) != (n2 = listnel(s2)) && n1 != 1 && n2 != 1) rc_error("bad concatenation"); for (r = top = nnew(List); 1; r = r->n = nnew(List)) { size_t x = strlen(s1->w); size_t y = strlen(s2->w); size_t z = x + y + 1; r->w = nalloc(z); strcpy(r->w, s1->w); strcat(r->w, s2->w); if (s1->m == NULL && s2->m == NULL) { r->m = NULL; } else { r->m = nalloc(z); if (s1->m == NULL) memzero(r->m, x); else memcpy(r->m, s1->m, x); if (s2->m == NULL) memzero(&r->m[x], y); else memcpy(&r->m[x], s2->m, y); r->m[z] = 0; } if (n1 > 1) s1 = s1->n; if (n2 > 1) s2 = s2->n; if (s1 == NULL || s2 == NULL || (n1 == 1 && n2 == 1)) break; } r->n = NULL; return top; } extern List *varsub(List *var, List *subs) { List *r, *top; int n = listnel(var); for (top = r = NULL; subs != NULL; subs = subs->n) { int i = a2u(subs->w); if (i < 1) rc_error("bad subscript"); if (i <= n) { List *sub = var; while (--i) sub = sub->n; /* loop until sub == var(i) */ if (top == NULL) top = r = nnew(List); else r = r->n = nnew(List); r->w = sub->w; r->m = sub->m; } } if (top != NULL) r->n = NULL; return top; } extern List *flatten(List *s) { List *r; size_t step; char *f; if (s == NULL || s->n == NULL) return s; r = nnew(List); f = r->w = nalloc(listlen(s) + 1); r->m = NULL; /* flattened lists come from variables, so no meta */ r->n = NULL; strcpy(f, s->w); f += strlen(s->w); do { *f++ = ' '; s = s->n; step = strlen(s->w); memcpy(f, s->w, step); f += step; } while (s->n != NULL); *f = '\0'; return r; } static List *count(List *l) { List *s = nnew(List); s->w = nprint("%d", listnel(l)); s->n = NULL; s->m = NULL; return s; } extern void assign(List *s1, List *s2, bool stack) { List *val = s2; if (s1 == NULL) rc_error("null variable name"); if (s1->n != NULL) rc_error("multi-word variable name"); if (*s1->w == '\0') rc_error("zero-length variable name"); if (a2u(s1->w) != -1) rc_error("numeric variable name"); if (strchr(s1->w, '=') != NULL) rc_error("'=' in variable name"); if (*s1->w == '*' && s1->w[1] == '\0') val = append(varlookup("0"), s2); /* preserve $0 when * is assigned explicitly */ if (s2 != NULL || stack) { if (dashex) prettyprint_var(2, s1->w, val); varassign(s1->w, val, stack); alias(s1->w, varlookup(s1->w), stack); } else { if (dashex) prettyprint_var(2, s1->w, NULL); varrm(s1->w, stack); } } /* The following two functions are by the courtesy of Paul Haahr, who could not stand the incompetence of my own backquote implementation. */ #define BUFSIZE ((size_t) 1000) static List *bqinput(List *ifs, int fd) { char *end, *bufend, *s; List *r, *top, *prev; size_t remain, bufsize; char isifs[256]; int n, state; /* a simple FSA is used to read in data */ memzero(isifs, sizeof isifs); for (isifs['\0'] = TRUE; ifs != NULL; ifs = ifs->n) for (s = ifs->w; *s != '\0'; s++) isifs[*(unsigned char *)s] = TRUE; remain = bufsize = BUFSIZE; top = r = nnew(List); r->w = end = nalloc(bufsize + 1); r->m = NULL; state = 0; prev = NULL; while (1) { if (remain == 0) { /* is the string bigger than the buffer? */ size_t m = end - r->w; char *buf; while (bufsize < m + BUFSIZE) bufsize *= 2; buf = nalloc(bufsize + 1); memcpy(buf, r->w, m); r->w = buf; end = &buf[m]; remain = bufsize - m; } if ((n = rc_read(fd, end, remain)) <= 0) { if (n == 0) /* break */ break; else if (errno == EINTR) return NULL; /* interrupted, wait for subproc */ else { uerror("backquote read"); rc_error(NULL); } } remain -= n; for (bufend = &end[n]; end < bufend; end++) if (state == 0) { if (!isifs[*(unsigned char *)end]) { state = 1; r->w = end; r->m = NULL; } } else { if (isifs[*(unsigned char *)end]) { state = 0; *end = '\0'; prev = r; r = r->n = nnew(List); r->w = end+1; r->m = NULL; } } } if (state == 1) { /* terminate last string */ *end = '\0'; r->n = NULL; } else { if (prev == NULL) /* no input at all? */ top = NULL; else prev->n = NULL; /* else terminate list */ } return top; } static List *backq(Node *ifs, Node *n) { int p[2], sp; pid_t pid; List *bq; if (n == NULL) return NULL; if (pipe(p) < 0) { uerror("pipe"); rc_error(NULL); } if ((pid = rc_fork()) == 0) { mvfd(p[1], 1); close(p[0]); redirq = NULL; walk(n, FALSE); exit(getstatus()); } close(p[1]); bq = bqinput(glom(ifs), p[0]); close(p[0]); rc_wait4(pid, &sp, TRUE); statprint(-1, sp); varassign("bqstatus", word(strstatus(sp), NULL), FALSE); sigchk(); return bq; } extern void qredir(Node *n) { Rq *next; if (redirq == NULL) { next = redirq = nnew(Rq); } else { for (next = redirq; next->n != NULL; next = next->n) ; next->n = nnew(Rq); next = next->n; } next->r = n; next->n = NULL; } #if HAVE_DEV_FD || HAVE_PROC_SELF_FD static List *mkcmdarg(Node *n) { char *name; List *ret = nnew(List); Estack *e = nnew(Estack); Edata efd; int p[2]; if (pipe(p) < 0) { uerror("pipe"); return NULL; } if (rc_fork() == 0) { setsigdefaults(FALSE); if (mvfd(p[n->u[0].i == rFrom], n->u[0].i == rFrom) < 0) /* stupid hack */ exit(1); close(p[n->u[0].i != rFrom]); redirq = NULL; walk(n->u[2].p, FALSE); exit(getstatus()); } #if HAVE_DEV_FD name = nprint("/dev/fd/%d", p[n->u[0].i != rFrom]); #else name = nprint("/proc/self/fd/%d", p[n->u[0].i != rFrom]); #endif efd.fd = p[n->u[0].i != rFrom]; except(eFd, efd, e); close(p[n->u[0].i == rFrom]); ret->w = name; ret->m = NULL; ret->n = NULL; return ret; } #elif HAVE_FIFO #if HAVE_MKFIFO /* Have POSIX mkfifo(). */ #else #define mkfifo(n,m) mknod(n, S_IFIFO | m, 0) #endif static List *mkcmdarg(Node *n) { int fd; char *name; Edata efifo; Estack *e = enew(Estack); List *ret = nnew(List); static int fifonumber = 0; name = nprint("/tmp/rc%d.%d", getpid(), fifonumber++); if (mkfifo(name, 0666) < 0) { uerror("mkfifo"); return NULL; } if (rc_fork() == 0) { setsigdefaults(FALSE); fd = rc_open(name, (n->u[0].i != rFrom) ? rFrom : rCreate); /* stupid hack */ if (fd < 0) { uerror("open"); exit(1); } if (mvfd(fd, (n->u[0].i == rFrom)) < 0) /* same stupid hack */ exit(1); redirq = NULL; walk(n->u[2].p, FALSE); exit(getstatus()); } efifo.name = name; except(eFifo, efifo, e); ret->w = name; ret->m = NULL; ret->n = NULL; return ret; } #else static List *mkcmdarg(Node *n) { rc_error("command arguments are not supported"); return NULL; } #endif extern List *glom(Node *n) { List *v, *head, *tail; Node *words; if (n == NULL) return NULL; switch (n->type) { case nArgs: case nLappend: words = n->u[0].p; tail = NULL; while (words != NULL && (words->type == nArgs || words->type == nLappend)) { if (words->u[1].p != NULL && words->u[1].p->type != nWord) break; head = glom(words->u[1].p); if (head != NULL) { head->n = tail; tail = head; } words = words->u[0].p; } v = append(glom(words), tail); /* force left to right evaluation */ return append(v, glom(n->u[1].p)); case nBackq: return backq(n->u[0].p, n->u[1].p); case nConcat: head = glom(n->u[0].p); /* force left-to-right evaluation */ return concat(head, glom(n->u[1].p)); case nDup: case nRedir: qredir(n); return NULL; case nWord: return word(n->u[0].s, n->u[1].s); case nNmpipe: return mkcmdarg(n); default: /* The next four operations depend on the left-child of glom to be a variable name. Therefore the variable is looked up here. */ if ((v = glom(n->u[0].p)) == NULL) rc_error("null variable name"); if (v->n != NULL) rc_error("multi-word variable name"); if (*v->w == '\0') rc_error("zero-length variable name"); v = (*v->w == '*' && v->w[1] == '\0') ? varlookup(v->w)->n : varlookup(v->w); switch (n->type) { default: panic("unexpected node in glom"); exit(1); /* NOTREACHED */ case nCount: return count(v); case nFlat: return flatten(v); case nVar: return v; case nVarsub: return varsub(v, glom(n->u[1].p)); } } } rc-1.7.4/aclocal.m40000644000175000017500000012174212524740571010726 00000000000000# generated automatically by aclocal 1.14.1 -*- Autoconf -*- # Copyright (C) 1996-2013 Free Software Foundation, Inc. # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY, to the extent permitted by law; without # even the implied warranty of MERCHANTABILITY or FITNESS FOR A # PARTICULAR PURPOSE. m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])]) m4_ifndef([AC_AUTOCONF_VERSION], [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.69],, [m4_warning([this file was generated for autoconf 2.69. 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AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)]) # Check how to create a tarball. -*- Autoconf -*- # Copyright (C) 2004-2013 Free Software Foundation, Inc. # # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. # _AM_PROG_TAR(FORMAT) # -------------------- # Check how to create a tarball in format FORMAT. # FORMAT should be one of 'v7', 'ustar', or 'pax'. # # Substitute a variable $(am__tar) that is a command # writing to stdout a FORMAT-tarball containing the directory # $tardir. # tardir=directory && $(am__tar) > result.tar # # Substitute a variable $(am__untar) that extract such # a tarball read from stdin. # $(am__untar) < result.tar # AC_DEFUN([_AM_PROG_TAR], [# Always define AMTAR for backward compatibility. Yes, it's still used # in the wild :-( We should find a proper way to deprecate it ... 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We just wanted to have am__tar # and am__untar set. test -n "${am_cv_prog_tar_$1}" && break # tar/untar a dummy directory, and stop if the command works. rm -rf conftest.dir mkdir conftest.dir echo GrepMe > conftest.dir/file AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar]) rm -rf conftest.dir if test -s conftest.tar; then AM_RUN_LOG([$am__untar /dev/null 2>&1 && break fi done rm -rf conftest.dir AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool]) AC_MSG_RESULT([$am_cv_prog_tar_$1])]) AC_SUBST([am__tar]) AC_SUBST([am__untar]) ]) # _AM_PROG_TAR m4_include([acinclude.m4]) rc-1.7.4/tree.c0000644000175000017500000001075712515531750010171 00000000000000/* tree.c: functions for manipulating parse-trees. (create, copy, delete) */ #include "rc.h" /* make a new node, pass it back to yyparse. Used to generate the parsetree. */ extern Node *mk(int /*nodetype*/ t,...) { va_list ap; Node *n; va_start(ap, t); switch (t) { default: panic("unexpected node in mk"); /* NOTREACHED */ case nDup: n = nalloc(offsetof(Node, u[3])); n->u[0].i = va_arg(ap, int); n->u[1].i = va_arg(ap, int); n->u[2].i = va_arg(ap, int); break; case nWord: n = nalloc(offsetof(Node, u[3])); n->u[0].s = va_arg(ap, char *); n->u[1].s = va_arg(ap, char *); n->u[2].i = va_arg(ap, int); break; case nBang: case nNowait: case nCount: case nFlat: case nRmfn: case nSubshell: case nVar: case nCase: n = nalloc(offsetof(Node, u[1])); n->u[0].p = va_arg(ap, Node *); break; case nAndalso: case nAssign: case nBackq: case nBody: case nBrace: case nConcat: case nElse: case nEpilog: case nIf: case nNewfn: case nCbody: case nOrelse: case nPre: case nArgs: case nSwitch: case nMatch: case nVarsub: case nWhile: case nLappend: n = nalloc(offsetof(Node, u[2])); n->u[0].p = va_arg(ap, Node *); n->u[1].p = va_arg(ap, Node *); break; case nForin: n = nalloc(offsetof(Node, u[3])); n->u[0].p = va_arg(ap, Node *); n->u[1].p = va_arg(ap, Node *); n->u[2].p = va_arg(ap, Node *); break; case nPipe: n = nalloc(offsetof(Node, u[4])); n->u[0].i = va_arg(ap, int); n->u[1].i = va_arg(ap, int); n->u[2].p = va_arg(ap, Node *); n->u[3].p = va_arg(ap, Node *); break; case nRedir: case nNmpipe: n = nalloc(offsetof(Node, u[3])); n->u[0].i = va_arg(ap, int); n->u[1].i = va_arg(ap, int); n->u[2].p = va_arg(ap, Node *); break; } n->type = t; va_end(ap); return n; } /* copy a tree to malloc space. Used when storing the definition of a function */ extern Node *treecpy(Node *s, void *(*alloc)(size_t)) { Node *n; if (s == NULL) return NULL; switch (s->type) { default: panic("unexpected node in treecpy"); /* NOTREACHED */ case nDup: n = (*alloc)(offsetof(Node, u[3])); n->u[0].i = s->u[0].i; n->u[1].i = s->u[1].i; n->u[2].i = s->u[2].i; break; case nWord: n = (*alloc)(offsetof(Node, u[3])); n->u[0].s = strcpy((char *) (*alloc)(strlen(s->u[0].s) + 1), s->u[0].s); if (s->u[1].s != NULL) { size_t i = strlen(s->u[0].s); n->u[1].s = (*alloc)(i); memcpy(n->u[1].s, s->u[1].s, i); } else n->u[1].s = NULL; n->u[2].i = s->u[2].i; break; case nBang: case nNowait: case nCase: case nCount: case nFlat: case nRmfn: case nSubshell: case nVar: n = (*alloc)(offsetof(Node, u[1])); n->u[0].p = treecpy(s->u[0].p, alloc); break; case nAndalso: case nAssign: case nBackq: case nBody: case nBrace: case nConcat: case nElse: case nEpilog: case nIf: case nNewfn: case nCbody: case nOrelse: case nPre: case nArgs: case nSwitch: case nMatch: case nVarsub: case nWhile: case nLappend: n = (*alloc)(offsetof(Node, u[2])); n->u[0].p = treecpy(s->u[0].p, alloc); n->u[1].p = treecpy(s->u[1].p, alloc); break; case nForin: n = (*alloc)(offsetof(Node, u[3])); n->u[0].p = treecpy(s->u[0].p, alloc); n->u[1].p = treecpy(s->u[1].p, alloc); n->u[2].p = treecpy(s->u[2].p, alloc); break; case nPipe: n = (*alloc)(offsetof(Node, u[4])); n->u[0].i = s->u[0].i; n->u[1].i = s->u[1].i; n->u[2].p = treecpy(s->u[2].p, alloc); n->u[3].p = treecpy(s->u[3].p, alloc); break; case nRedir: case nNmpipe: n = (*alloc)(offsetof(Node, u[3])); n->u[0].i = s->u[0].i; n->u[1].i = s->u[1].i; n->u[2].p = treecpy(s->u[2].p, alloc); break; } n->type = s->type; return n; } /* free a function definition that is no longer needed */ extern void treefree(Node *s) { if (s == NULL) return; switch (s->type) { default: panic("unexpected node in treefree"); /* NOTREACHED */ case nDup: break; case nWord: efree(s->u[0].s); efree(s->u[1].s); break; case nBang: case nNowait: case nCount: case nFlat: case nRmfn: case nSubshell: case nVar: case nCase: treefree(s->u[0].p); break; case nAndalso: case nAssign: case nBackq: case nBody: case nBrace: case nConcat: case nElse: case nEpilog: case nIf: case nNewfn: case nOrelse: case nPre: case nArgs: case nCbody: case nSwitch: case nMatch: case nVarsub: case nWhile: case nLappend: treefree(s->u[1].p); treefree(s->u[0].p); break; case nForin: treefree(s->u[2].p); treefree(s->u[1].p); treefree(s->u[0].p); break; case nPipe: treefree(s->u[2].p); treefree(s->u[3].p); break; case nRedir: case nNmpipe: treefree(s->u[2].p); } efree(s); } rc-1.7.4/fn.c0000644000175000017500000001455312507445074007637 00000000000000/* fn.c: functions for adding and deleting functions from the symbol table. Support for signal handlers is also found here. */ #include "rc.h" #include #include #include "input.h" #include "sigmsgs.h" static void fn_handler(int), dud_handler(int); static bool runexit = FALSE; static Node *handlers[NUMOFSIGNALS], null; static void (*def_sigint)(int) = SIG_DFL; static void (*def_sigquit)(int) = SIG_DFL; static void (*def_sigterm)(int) = SIG_DFL; /* Set signals to default values for rc. This means that interactive shells ignore SIGTERM, etc. */ extern void inithandler() { int i; null.type = nBody; null.u[0].p = null.u[1].p = NULL; for (i = 1; i < NUMOFSIGNALS; i++) #if HAVE_SYSV_SIGCLD if (i != SIGCLD) #endif if (sighandlers[i] == SIG_IGN) fnassign(signals[i].name, NULL); /* ignore incoming ignored signals */ if (interactive || sighandlers[SIGINT] != SIG_IGN) { def_sigint = sigint; fnrm("sigint"); /* installs SIGINT catcher if not inherited ignored */ } if (!dashdee) { if (interactive || sighandlers[SIGQUIT] != SIG_IGN) { def_sigquit = dud_handler; fnrm("sigquit"); /* "ignores" SIGQUIT unless inherited ignored */ } if (interactive) { def_sigterm = dud_handler; fnrm("sigterm"); /* ditto for SIGTERM */ } } } /* only run this in a child process! resets signals to their default values */ extern void setsigdefaults(bool sysvbackground) { int i; /* General housekeeping: setsigdefaults happens after fork(), so it's a convenient place to clean up open file descriptors. (history file, scripts, etc.) */ closefds(); /* Restore signals to SIG_DFL, paying close attention to a few quirks: SIGINT, SIGQUIT and are treated specially depending on whether we are doing v7-style backgrounding or not; the default action for SIGINT, SIGQUIT and SIGTERM must be set to the appropriate action; finally, care must be taken not to set to SIG_DFL any signals which are being ignored. */ for (i = 1; i < NUMOFSIGNALS; i++) if (sighandlers[i] != SIG_IGN) { handlers[i] = NULL; switch (i) { case SIGINT: if (sysvbackground) { def_sigint = SIG_IGN; fnassign("sigint", NULL); /* ignore */ } else { def_sigint = SIG_DFL; goto sigcommon; } break; case SIGQUIT: if (sysvbackground) { def_sigquit = SIG_IGN; fnassign("sigquit", NULL); /* ignore */ } else { def_sigquit = SIG_DFL; goto sigcommon; } break; case SIGTERM: def_sigterm = SIG_DFL; /* FALLTHROUGH */ sigcommon: default: if (sighandlers[i] != SIG_DFL) { rc_signal(i, SIG_DFL); delete_fn(signals[i].name); } } } delete_fn("sigexit"); runexit = FALSE; /* No sigexit on subshells */ } /* rc's exit. if runexit is set, run the sigexit function. */ extern void rc_exit(int stat) { if (runexit) { char *sig[2]; sig[0] = "sigexit"; sig[1] = NULL; runexit = FALSE; funcall(sig); stat = getstatus(); } exit(stat); } /* The signal handler for all functions. calls walk() */ static void fn_handler(int s) { char *sig[2]; int olderrno; if (s < 1 || s >= NUMOFSIGNALS) panic("unknown signal"); olderrno = errno; sig[0] = signals[s].name; sig[1] = NULL; funcall(sig); errno = olderrno; } /* A dud signal handler for SIGQUIT and SIGTERM */ static void dud_handler(int ignore) { } /* Assign a function in Node form. Check to see if the function is also a signal, and set the signal vectors appropriately. */ extern void fnassign(char *name, Node *def) { Node *newdef = treecpy(def == NULL ? &null : def, ealloc); /* important to do the treecopy first */ rc_Function *new = get_fn_place(name); int i; new->def = newdef; new->extdef = NULL; if (strncmp(name, "sig", conststrlen("sig")) == 0) { /* slight optimization */ #if HAVE_SYSV_SIGCLD /* System V machines treat SIGCLD very specially */ if (streq(name, "sigcld")) rc_error("can't trap SIGCLD"); #endif if (streq(name, "sigexit")) runexit = TRUE; for (i = 1; i < NUMOFSIGNALS; i++) /* zero is a bogus signal */ if (streq(signals[i].name, name)) { handlers[i] = newdef; if (def == NULL) rc_signal(i, SIG_IGN); else rc_signal(i, fn_handler); break; } } } /* Assign a function from the environment. Store just the external representation */ extern void fnassign_string(char *extdef) { char *name = get_name(extdef+3); /* +3 to skip over "fn_" */ rc_Function *new; if (name == NULL) return; new = get_fn_place(name); new->def = NULL; new->extdef = ecpy(extdef); } /* Return a function in Node form, evaluating an entry from the environment if necessary */ extern Node *fnlookup(char *name) { rc_Function *look = lookup_fn(name); Node *ret; if (look == NULL) return NULL; /* not found */ if (look->def != NULL) return look->def; if (look->extdef == NULL) /* function was set to null, e.g., fn foo {} */ return &null; ret = parse_fn(look->extdef); if (ret == NULL) { efree(look->extdef); look->extdef = NULL; return &null; } else { return look->def = treecpy(ret, ealloc); /* Need to take it out of nalloc space */ } } /* Return a function in string form (used by makeenv) */ extern char *fnlookup_string(char *name) { rc_Function *look = lookup_fn(name); if (look == NULL) return NULL; if (look->extdef != NULL) return look->extdef; return look->extdef = mprint("fn_%F={%T}", name, look->def); } /* Remove a function from the symbol table. If it also defines a signal handler, restore the signal handler to its default value. */ extern void fnrm(char *name) { int i; for (i = 1; i < NUMOFSIGNALS; i++) if (streq(signals[i].name, name)) { handlers[i] = NULL; switch (i) { case SIGINT: rc_signal(i, def_sigint); break; case SIGQUIT: rc_signal(i, def_sigquit); break; case SIGTERM: rc_signal(i, def_sigterm); break; default: rc_signal(i, SIG_DFL); } } if (streq(name, "sigexit")) runexit = FALSE; delete_fn(name); } extern void whatare_all_signals() { int i; for (i = 1; i < NUMOFSIGNALS; i++) if (*signals[i].name != '\0') { if (sighandlers[i] == SIG_IGN) fprint(1, "fn %s {}\n", signals[i].name); else if (sighandlers[i] == fn_handler) fprint(1, "fn %S {%T}\n", signals[i].name, handlers[i]); else fprint(1, "fn %s\n", signals[i].name); } } extern void prettyprint_fn(int fd, char *name, Node *n) { fprint(fd, "fn %S {%T}\n", name, n); } rc-1.7.4/missing0000755000175000017500000001533012404036304010445 00000000000000#! /bin/sh # Common wrapper for a few potentially missing GNU programs. scriptversion=2013-10-28.13; # UTC # Copyright (C) 1996-2013 Free Software Foundation, Inc. # Originally written by Fran,cois Pinard , 1996. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, or (at your option) # any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program. If not, see . # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under # the same distribution terms that you use for the rest of that program. if test $# -eq 0; then echo 1>&2 "Try '$0 --help' for more information" exit 1 fi case $1 in --is-lightweight) # Used by our autoconf macros to check whether the available missing # script is modern enough. exit 0 ;; --run) # Back-compat with the calling convention used by older automake. shift ;; -h|--h|--he|--hel|--help) echo "\ $0 [OPTION]... PROGRAM [ARGUMENT]... Run 'PROGRAM [ARGUMENT]...', returning a proper advice when this fails due to PROGRAM being missing or too old. 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In no event will the authors be held liable for any damages arising from the use of this software. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. 3. This notice may not be removed or altered from any source distribution. Byron Rakitzis */ rc-1.7.4/system-bsd.c0000644000175000017500000000202512507445074011315 00000000000000/* signal-safe read and write (for BSD slow devices). writeall() also allows partial writes */ #include "rc.h" #include #include "jbwrap.h" #include "wait.h" Jbwrap slowbuf; volatile sig_atomic_t slow; static char *safe_buf; static size_t safe_remain; extern void writeall(int fd, char *buf, size_t remain) { int i; safe_buf = buf; safe_remain = remain; for (i = 0; safe_remain > 0; buf += i, safe_remain -= i) { if (sigsetjmp(slowbuf.j, 1) == 0) { slow = TRUE; if ((i = write(fd, safe_buf, safe_remain)) <= 0) break; /* abort silently on errors in write() */ } else break; } slow = FALSE; sigchk(); } extern int rc_read(int fd, char *buf, size_t n) { ssize_t r; if (sigsetjmp(slowbuf.j, 1) == 0) { slow = TRUE; r = read(fd, buf, n); } else { errno = EINTR; r = -1; } slow = FALSE; return r; } static int r = -1; extern pid_t rc_wait(int *stat) { if (sigsetjmp(slowbuf.j, 1) == 0) { slow = TRUE; r = wait(stat); } else { errno = EINTR; r = -1; } slow = FALSE; return r; } rc-1.7.4/config.h.in0000644000175000017500000001156312524740602011103 00000000000000/* config.h.in. Generated from configure.ac by autoheader. */ /* The default interpreter */ #undef DEFAULTINTERP /* The default path */ #undef DEFAULTPATH /* Define to the type of elements in the array set by `getgroups'. Usually this is either `int' or `gid_t'. */ #undef GETGROUPS_T /* Define to 1 if your kernel understands `#!' magic numbers */ #undef HASH_BANG /* Define to 1 if you have /dev/fd. */ #undef HAVE_DEV_FD /* Define to 1 if you have the header file, and it defines `DIR'. */ #undef HAVE_DIRENT_H /* Define to 1 if you have the `mkfifo' function. */ #undef HAVE_FIFO /* Define to 1 if you have the `getgroups' function. */ #undef HAVE_GETGROUPS /* Define to 1 if you have the header file. */ #undef HAVE_INTTYPES_H /* Define to 1 if you have the `lstat' function. */ #undef HAVE_LSTAT /* Define to 1 if you have the header file. */ #undef HAVE_MEMORY_H /* Define to 1 if you have the `mkfifo' function. */ #undef HAVE_MKFIFO /* Define to 1 if you have the header file, and it defines `DIR'. */ #undef HAVE_NDIR_H /* Define to 1 if you have the `getgroups' function with POSIX semantics. */ #undef HAVE_POSIX_GETGROUPS /* Define to 1 if you have /proc/self/fd. */ #undef HAVE_PROC_SELF_FD /* Define to 1 if you have the `quad_t' type. */ #undef HAVE_QUAD_T /* Define to 1 if system calls automatically restart after interruption by a signal. */ #undef HAVE_RESTARTABLE_SYSCALLS /* Define to 1 if you have the `rlim_t' type. */ #undef HAVE_RLIM_T /* Define to 1 if you have the `setpgrp' function. */ #undef HAVE_SETPGRP /* Define to 1 if you have the `setrlimit' function. */ #undef HAVE_SETRLIMIT /* Define to 1 if you have the `sigaction' function. */ #undef HAVE_SIGACTION /* Define to 1 if you have the `sigsetjmp' function or macro. */ #undef HAVE_SIGSETJMP /* Define to 1 if you have the header file. */ #undef HAVE_STDINT_H /* Define to 1 if you have the header file. */ #undef HAVE_STDLIB_H /* Define to 1 if you have the `strerror' function or macro. */ #undef HAVE_STRERROR /* Define to 1 if you have the header file. */ #undef HAVE_STRINGS_H /* Define to 1 if you have the header file. */ #undef HAVE_STRING_H /* Has SysV SIGCLD */ #undef HAVE_SYSV_SIGCLD /* Define to 1 if you have the header file, and it defines `DIR'. */ #undef HAVE_SYS_DIR_H /* Define to 1 if you have the header file, and it defines `DIR'. */ #undef HAVE_SYS_NDIR_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_RESOURCE_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_STAT_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_TIME_H /* Define to 1 if you have the header file. */ #undef HAVE_SYS_TYPES_H /* Define to 1 if you have that is POSIX.1 compatible. */ #undef HAVE_SYS_WAIT_H /* Define to 1 if you have the header file. */ #undef HAVE_UNISTD_H /* Name of package */ #undef PACKAGE /* Define to the address where bug reports for this package should be sent. */ #undef PACKAGE_BUGREPORT /* Define to the full name of this package. */ #undef PACKAGE_NAME /* Define to the full name and version of this package. */ #undef PACKAGE_STRING /* Define to the one symbol short name of this package. */ #undef PACKAGE_TARNAME /* Define to the home page for this package. */ #undef PACKAGE_URL /* Define to the version of this package. */ #undef PACKAGE_VERSION /* Define to 1 to encode exported environment names. */ #undef PROTECT_ENV /* Define to 1 to use addon functions. */ #undef RC_ADDON /* Define to 1 to include `echo' as a builtin. */ #undef RC_ECHO /* Define to 1 to use job-control-style backgrounding. */ #undef RC_JOB /* Release date */ #undef RELDATE /* Define to 1 if `_KERNEL' must be defined for `RLIMIT_*' macros. */ #undef RLIMIT_NEEDS_KERNEL /* Define to 1 if `rlim_t' is `quad_t'. */ #undef RLIM_T_IS_QUAD_T /* Define to 1 if the `setpgrp' function takes no argument. */ #undef SETPGRP_VOID /* Define to 1 if you have the ANSI C header files. */ #undef STDC_HEADERS /* Version number of package */ #undef VERSION /* Enable large inode numbers on Mac OS X 10.5. */ #ifndef _DARWIN_USE_64_BIT_INODE # define _DARWIN_USE_64_BIT_INODE 1 #endif /* Number of bits in a file offset, on hosts where this is settable. */ #undef _FILE_OFFSET_BITS /* Define for large files, on AIX-style hosts. */ #undef _LARGE_FILES /* Define to `int' if doesn't define. */ #undef gid_t /* Define to `int' if does not define. */ #undef pid_t /* Define to 1 if you have the `sig_atomic_t' type. */ #undef sig_atomic_t /* Define to `unsigned int' if does not define. */ #undef size_t /* Define to `long' if does not define. */ #undef ssize_t /* Define to `int' if doesn't define. */ #undef uid_t rc-1.7.4/tripping.c0000644000175000017500000000131112507445074011054 00000000000000/* This is an auxiliary test program for rc. */ #include "config.h" #include #include #include #include #include static void out0(void) { putchar('t'); putchar('r'); putchar('\0'); putchar('u'); putchar('e'); putchar('\n'); } static void ctrl_a(void) { puts("a\001ab\002b"); } static void makenonblock(void) { int flags; if ((flags = fcntl(0, F_GETFL)) == -1) perror("fcntl 1"); flags |= O_NONBLOCK; if (fcntl(0, F_SETFL, (long) flags) == -1) perror("fcntl 2"); } int main(int argc, char **argv) { switch(argv[1][0]) { case '0': out0(); break; case 'a': ctrl_a(); break; case 'n': makenonblock(); break; } return 0; } rc-1.7.4/mkstatval.c0000644000175000017500000000066612507445074011242 00000000000000#include #include #include #include int main(void) { int cstatus, pstatus; pid_t pid; for (cstatus = 0; cstatus < 2; ++cstatus) { switch (pid = fork()) { case -1: perror("fork"); return 1; case 0: _exit(cstatus); default: if (wait(&pstatus) != pid) { perror("wait"); return 1; } printf("#define STATUS%d %d\n", cstatus, pstatus); } } return 0; } rc-1.7.4/history.10000644000175000017500000001445512507445074010654 00000000000000.\" history.1 .\"------- .\" See rc.1 for man page portability notes. .\"------- .\" Dd distance to space vertically before a "display" .\" These are what n/troff use for interparagraph distance .\"------- .if t .nr Dd .4v .if n .nr Dd 1v .\"------- .\" Ds begin a display, indented .5 inches from the surrounding text. .\" .\" Note that uses of Ds and De may NOT be nested. .\"------- .de Ds .\" .RS \\$1 .sp \\n(Ddu .in +0.5i .nf .. .\"------- .\" De end a display (no trailing vertical spacing) .\"------- .de De .fi .in .\" .RE .. .\"------- .\" I stole the Xf macro from the -man macros on my machine (originally .\" "}S", I renamed it so that it won't conflict). .\"------- .\" Set Cf to the name of the constant width font. .\" It will be "C" or "(CW", typically. .\" NOTEZ BIEN the lines defining Cf must have no trailing white space: .\"------- .if t .ds Cf C .if n .ds Cf R .\"------- .\" Rc - Alternate Roman and Courier .\"------- .de Rc .Xf R \\*(Cf \& "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" .. .\"------- .\" Ic - Alternate Italic and Courier .\"------- .de Ic .Xf I \\*(Cf \& "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" .. .\"------- .\" Bc - Alternate Bold and Courier .\"------- .de Bc .Xf B \\*(Cf \& "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" .. .\"------- .\" Cr - Alternate Courier and Roman .\"------- .de Cr .Xf \\*(Cf R \& "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" .. .\"------- .\" Ci - Alternate Courier and Italic .\"------- .de Ci .Xf \\*(Cf I \& "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" .. .\"------- .\" Cb - Alternate Courier and Bold .\"------- .de Cb .Xf \\*(Cf B \& "\\$1" "\\$2" "\\$3" "\\$4" "\\$5" "\\$6" .. .\"------- .\" Xf - Alternate fonts .\" .\" \$1 - first font .\" \$2 - second font .\" \$3 - desired word with embedded font changes, built up by recursion .\" \$4 - text for first font .\" \$5 - \$9 - remaining args .\" .\" Every time we are called: .\" .\" If there is something in \$4 .\" then Call ourself with the fonts switched, .\" with a new word made of the current word (\$3) and \$4 .\" rendered in the first font, .\" and with the remaining args following \$4. .\" else We are done recursing. \$3 holds the desired output .\" word. We emit \$3, change to Roman font, and restore .\" the point size to the default. .\" fi .\" .\" Use Xi to add a little bit of space after italic text. .\"------- .de Xf .ds Xi .\"------- .\" I used to test for the italic font both by its font position .\" and its name. Now just test by its name. .\" .\" .if "\\$1"2" .if !"\\$5"" .ds Xi \^ .\"------- .if "\\$1"I" .if !"\\$5"" .ds Xi \^ .\"------- .\" This is my original code to deal with the recursion. .\" Evidently some nroffs can't deal with it. .\"------- .\" .ie !"\\$4"" \{\ .\" . Xf \\$2 \\$1 "\\$3\\f\\$1\\$4\\*(Xi" "\\$5" "\\$6" "\\$7" "\\$8" "\\$9" .\" .\} .\" .el \{\\$3 .\" . ft R \" Restore the default font, since we don't know .\" . \" what the last font change was. .\" . ps 10 \" Restore the default point size, since it might .\" . \" have been changed by an argument to this macro. .\" .\} .\"------- .\" Here is more portable (though less pretty) code to deal with .\" the recursion. .\"------- .if !"\\$4"" .Xf \\$2 \\$1 "\\$3\\f\\$1\\$4\\*(Xi" "\\$5" "\\$6" "\\$7" "\\$8" "\\$9" .if "\\$4"" \\$3\fR\s10 .. .TH HISTORY 1 "30 July 1991" .SH NAME \-, \-\|\-, \-p, \-\|\-p \- shell history programs .SH SYNOPSIS .B \- .RI [ pattern ...] .RI [ substitution ...] .SH DESCRIPTION This set of programs provides a crude history mechanism for the shell .IR rc (1). It is based on the v8 UNIX programs .IR = , .IR == , etc. .PP The program .RI `` \- '' runs the shell on the command it is requested to find. The program .RI `` \-\|\- '' edits that command first. The programs .RI `` \-p '' and .RI `` \-\|\-p '' are similar, except that they print the final command on their standard output instead of running the shell. .PP The commands work by looking for a file named by the environment variable .Cr $history , and by searching for previous commands in this file. Old commands can be edited, or simply re-executed according to the rules below: .PP A command is searched for by examining the lines in .Cr $history in reverse order. Lines which contain a previous invocation of the history program itself are ignored. If one or more .I pattern is supplied on the command line, then the patterns are used as a means of limiting the search. Patterns match any substring of a previous command, and if more than one pattern is present then all patterns must be matched before a command is selected. .PP Substitutions may also be specified on the command line. These have the syntax: .Ds .Ic old :[:...] new .De .PP (Note that the .I old pattern is used as a search-limiting pattern also.) Substitutions happen from left to right and are repeated according to the number of colons specified. .PP Finally, if the program was invoked as .RI `` -- '' or .RI `` --p '', a command may be edited in a crude line-mode fashion. The line to be edited is printed out, and below it the user supplies modifications to the command. .TP .B any character except those below Replaces the character above. .TP .B space or tab Skips over the above character(s). .TP .B # Deletes one character. .TP .B % Replaces one character with a space. .TP .B ^ Inserts the rest of the typed line just before the character. .TP .B $ Deletes the rest of the line from that character on, and replaces it with the rest of the typed line. .TP .B + Appends the rest of the typed line. .TP .B \- Backs up to a previous command satisfying the same matching constraints. .TP .B end of line If any changes have been made, the command is printed out again for further editing. If no changes have been made, the command is executed or printed, and the program exits. .TP .B end of file If an end-of-file is read from the keyboard by the editor, it aborts with exit status 1 and does not produce any output. .SH EXAMPLES The history programs work best when their output is reinterpreted by the shell using an .Cr eval command. This can be achieved by writing a shell function to perform the reinterpretation: .Ds .Cr "fn - -- {" .Cr " comm = \`{$0^p $*}" .Cr " if (! ~ $#comm 0) {" .Cr " echo $comm >[1=2]" .Cr " eval $comm" .Cr " }" .Cr "}" .De .PP Stuttering the `:' in a substitution allows things like: .Ds ; prog 1 2 3 abc > /very/long/path/abc.out etc. - prog abc::xyz prog 1 2 3 xyz > /very/long/path/xyz.out ; .De rc-1.7.4/nalloc.c0000644000175000017500000000615512507445074010503 00000000000000/* nalloc.c: a simple single-arena allocator for command-line-lifetime allocation */ #include "rc.h" static struct Block { size_t used, size; char *mem; Block *n; } *fl, *ul; /* alignto() works only with power of 2 blocks and assumes 2's complement arithmetic */ #define alignto(m, n) ((m + n - 1) & ~(n - 1)) #define BLOCKSIZE ((size_t) 4096) /* Allocate a block from the free list or malloc one if none in the fl fit */ static void getblock(size_t n) { Block *r, *p; for (r = fl, p = NULL; r != NULL; p = r, r = r->n) if (n <= r->size) break; /* look for a block which fits the request */ if (r != NULL) { /* if one is found, take it off the free list */ if (p != NULL) p->n = r->n; else fl = r->n; } else { /* else allocate a new block */ r = enew(Block); r->mem = ealloc(r->size = alignto(n, BLOCKSIZE)); } r->used = 0; r->n = ul; ul = r; } /* A fast single-arena allocator. Looks at the current block, and if there is not enough room, it goes to getblock() for more. "ul" stands for "used list", and the head of the list is the current block. "ulp" is a register cache for "ul"; this routine is hacked for speed. (sigh, optimizing RISC compilers still can't cache the address of a global in a register) */ extern void *nalloc(size_t n) { size_t base; Block *ulp; n = alignto(n, sizeof(align_t)); ulp = ul; if (ulp != NULL && n + (base = ulp->used) < ulp->size) { ulp->used = base + n; return &ulp->mem[base]; } else { getblock(n); assert(ul->used == 0); (ulp = ul)->used = n; return &ulp->mem[0]; } } /* Frees memory from nalloc space by putting it on the free list. Returns free blocks to the system, retaining at least MAXMEM bytes worth of blocks for nalloc. */ #define MAXMEM 500000 extern void nfree() { size_t count; Block *r; if (ul == NULL) return; for (r = ul; r->n != NULL; r = r->n) ; /* get to end of used list */ r->n = fl; /* tack free list onto it */ fl = ul; /* and make it the free list */ ul = NULL; /* finally, zero out the used list */ for (r = fl, count = r->size; r->n != NULL; r = r->n, count += r->size) { if (count >= MAXMEM) { Block *tmp = r; r = r->n; tmp->n = NULL; /* terminate the free list */ while (r != NULL) { /* free memory off the tail of the free list */ tmp = r->n; efree(r->mem); efree(r); r = tmp; } return; } } } /* "Allocates" a new arena by zeroing out the old one. Up to the calling routine to keep the old value of the block around. */ extern Block *newblock() { Block *old = ul; ul = NULL; return old; } /* "Restores" an arena to its saved value. */ extern void restoreblock(Block *old) { nfree(); ul = old; } /* generic memory allocation functions */ extern void *ealloc(size_t n) { void *p; assert(n); p = malloc(n); if (p == NULL) { uerror("malloc"); rc_exit(1); } return p; } extern void *erealloc(void *p, size_t n) { if (p == NULL) /* erealloc() has POSIX realloc() semantics */ return ealloc(n); if ((p = realloc(p, n)) == NULL) { uerror("realloc"); rc_exit(1); } return p; } extern void efree(void *p) { if (p != NULL) free(p); } rc-1.7.4/edit-readline.c0000644000175000017500000000322212515531750011725 00000000000000#include "rc.h" #include #include #include #include #include #include "edit.h" bool editing = 1; struct cookie { char *buffer; }; void *edit_begin(int fd) { List *hist; struct cookie *c; rl_catch_signals = 0; rl_completer_quote_characters = "'"; rl_filename_quote_characters = "\t\n !#$&'()*;<=>?@[\\]^`{|}~"; hist = varlookup("history"); if (hist != NULL) if (read_history(hist->w) != 0 && errno != ENOENT) /* ignore if missing */ uerror(hist->w); c = ealloc(sizeof *c); c->buffer = NULL; return c; } static void edit_catcher(int sig) { write(2, "\n", 1); rc_raise(eError); } static char *prompt; char *edit_alloc(void *cookie, size_t *count) { struct cookie *c = cookie; void (*oldint)(int), (*oldquit)(int); oldint = sys_signal(SIGINT, edit_catcher); oldquit = sys_signal(SIGQUIT, edit_catcher); c->buffer = readline(prompt); sys_signal(SIGINT, oldint); sys_signal(SIGQUIT, oldquit); if (c->buffer) { *count = strlen(c->buffer); if (*count) add_history(c->buffer); c->buffer[*count] = '\n'; ++*count; /* include the \n */ } return c->buffer; } void edit_prompt(void *cookie, char *pr) { prompt = pr; } void edit_free(void *cookie) { struct cookie *c = cookie; efree(c->buffer); /* Set c->buffer to NULL, allowing us to "overfree" it. This is a bit of a kludge, but it's otherwise hard to deal with the case where a signal causes an early return from readline. */ c->buffer = NULL; } void edit_end(void *cookie) { struct cookie *c = cookie; efree(c); } void edit_reset(void *cookie) { rl_reset_terminal(NULL); } rc-1.7.4/edit.h0000644000175000017500000000035412515531750010154 00000000000000extern bool editing; extern void *edit_begin(int fd); extern char *edit_alloc(void *, size_t *); extern void edit_free(void *); extern void edit_prompt(void *, char *); extern void edit_end(void *); extern void edit_reset(void *); rc-1.7.4/trip.rc0000644000175000017500000004051612524467164010375 00000000000000# trip.rc -- take a tour of rc # Invoke as "path-to-new-rc < trip.rc" rc=$0 echo tripping $rc $version tmpdir='' fn fail { echo >[1=2] trip took a wrong turn: $* rm -rf $tmpdir fn sigexit exit 1 } fn expect { echo >[1=2] -n expect $^*^': ' } fn submatch { if (!~ $#* 3) fail incorrect invocation of submatch prompt=$nl if (!~ `` $nl {$rc -ic $1>[2=1]} $2) fail $3 } fn sigexit sigint sigquit sigsegv fn sigexit { echo trip complete } tmpdir=`{ mktemp -d -t rc-trip.XXXXXX } tmp=$tmpdir/tmp nl=' ' # # rc -c # if ($rc -c >[2]/dev/null) fail 'rc -c didn''t report a bad exit status' x=`{$rc -c 'echo $0 $2 $#*' a b c d e f} if (false) { # WARNING: this differs from sh if (!~ $x(1) a) fail rc -c reports '$0' incorrectly as $x(1) if (!~ $x(2) c) fail rc -c reports '$2' incorrectly as $x(2) if (!~ $x(3) 5) fail rc -c reports '$#' incorrectly as $x(3) } else { if (!~ $x(1) $rc) fail rc -c reports '$0' incorrectly as $x(1) if (!~ $x(2) b) fail rc -c reports '$2' incorrectly as $x(2) if (!~ $x(3) 6) fail rc -c reports '$#' incorrectly as $x(3) } # # umask # umask 0 > $tmp x=`{ls -l $tmp} if (!~ $x(1) -rw-rw-rw-*) fail umask 0 produced incorrect result: $x(1) rm -f $tmp umask 027 > $tmp y=`{ls -l $tmp} if (!~ $y(1) -rw-r-----*) fail umask 027 produced incorrect file: $y(1) rm -f $tmp if (!~ `umask 027) fail umask reported bad value: `umask submatch 'umask bad' 'bad umask' 'bad umask' submatch 'umask -027' 'bad umask' 'bad umask' submatch 'umask 999999' 'bad umask' 'bad umask' submatch 'umask hi there' 'rc: too many arguments to umask' 'umask arg count' if (!~ `umask 027) fail bad umask changed umask value to `umask # # redirections # fn bytes { for (i) x=`{wc -c $i} echo $x(1) } echo foo > foo > bar if (!~ `{bytes foo} 0) fail double redirection created non-empty empty file if (!~ `{bytes bar} 4) fail double redirection created wrong sized file: `{bytes bar} rm -f foo bar echo -n >1 >[2]2 >[1=2] foo x = `` '' {cat 1} if (!~ $#x 0) fail dup created non-empty empty file: `` '' {cat 1} if (!~ `` '' {cat 2} foo) fail dup put wrong contents in file : `` '' {cat 2} rm -f 1 2 expect error from cat, closing stdin cat >[0=] submatch 'cat>(1 2 3)' 'rc: multi-word filename in redirection' 'redirection error' submatch 'cat>()' 'rc: null filename in redirection' 'redirection error' # # blow the input stack # if (!~ hi `{ eval eval eval eval eval eval eval eval eval eval eval eval eval \ eval eval eval eval eval eval eval eval eval eval eval eval eval \ eval eval eval eval eval eval eval eval eval eval eval eval eval \ eval eval eval eval eval eval eval eval eval eval eval eval eval \ eval eval eval eval eval eval eval eval eval eval eval eval eval \ eval eval eval eval eval eval eval eval eval eval eval eval eval \ eval eval eval eval eval eval eval eval eval eval eval eval eval \ eval eval eval eval eval eval eval eval eval eval eval eval eval \ eval eval eval eval eval eval eval eval eval eval eval eval eval \ eval eval eval eval eval eval eval eval eval eval eval eval eval \ eval eval eval eval eval eval eval eval eval eval eval echo hi }) fail huge eval # # heredocs and herestrings # bigfile=$tmpdir/big.$pid od $rc | sed 5000q > $bigfile abc=(this is a) x=() result='this is a heredoc this is an heredoc ' if (!~ `` '' {<<[5] EOF cat <[0=5]} $result) fail unquoted heredoc $abc heredoc$x $abc^n $x^here$x^doc EOF {if (!~ `` $nl cat ' ') fail quoted heredoc} << ' ' <<<[9] ``''{cat $bigfile} \ { if(!~ ``''{cat <[0=9]}``'' cat)fail large herestrings } < \ $bigfile rm -f $bigfile if (!~ `{cat< $tmp $rc $tmp rm -f $tmp echo here_is_a_really_long_word.It_has_got_to_be_longer_than_1000_characters_for_the_lexical_analyzers_buffer_to_overflow_but_that_should_not_be_too_difficult_to_do.Let_me_start_writing_some_Lewis_Carroll.Twas_brillig_and_the_slithy_toves,Did_gyre_and_gimble_in_the_wabe.All_mimsy_were_the_borogoves,And_the_mome-raths_outgrabe.Beware_the_Jabberwock_my_son,The_jaws_that_bite,the_claws_that_catch.Beware_the_Jub-jub_bird,and_shun_The_frumious_Bandersnatch.He_took_his_vorpal_sword_in_hand,Long_time_the_manxome_foe_he_sought,So_rested_he_by_the_Tumtum_tree,And_stood_awhile_in_thought.And_as_in_uffish_thought_he_stood,The_Jabberwock,with_eyes_of_flame,Came_whiffling_through_the_tulgey_wood,And_burbled_as_it_came.One_two,one_two.And_through_and_through_The_vorpal_blade_went_snicker-snack.He_left_it_dead_and_with_its_head,He_went_galumphing_back.And_hast_thou_slain_the_Jabberwock?Come_to_my_arms,my_beamish_boy,Oh_frabjous_day.Callooh_callay.He_chortled_in_his_joy.Twas_brillig,and_the_slithy_toves,Did_gyre_and_gimble_in_the_wabe,All_mimsy_were_the_borogoves,And_the_mome-raths_outgrabe. > $tmpdir/$pid.lw echo 'here_is_a_really_long_word.It_has_got_to_be_longer_than_1000_characters_for_the_lexical_analyzers_buffer_to_overflow_but_that_should_not_be_too_difficult_to_do.Let_me_start_writing_some_Lewis_Carroll.Twas_brillig_and_the_slithy_toves,Did_gyre_and_gimble_in_the_wabe.All_mimsy_were_the_borogoves,And_the_mome-raths_outgrabe.Beware_the_Jabberwock_my_son,The_jaws_that_bite,the_claws_that_catch.Beware_the_Jub-jub_bird,and_shun_The_frumious_Bandersnatch.He_took_his_vorpal_sword_in_hand,Long_time_the_manxome_foe_he_sought,So_rested_he_by_the_Tumtum_tree,And_stood_awhile_in_thought.And_as_in_uffish_thought_he_stood,The_Jabberwock,with_eyes_of_flame,Came_whiffling_through_the_tulgey_wood,And_burbled_as_it_came.One_two,one_two.And_through_and_through_The_vorpal_blade_went_snicker-snack.He_left_it_dead_and_with_its_head,He_went_galumphing_back.And_hast_thou_slain_the_Jabberwock?Come_to_my_arms,my_beamish_boy,Oh_frabjous_day.Callooh_callay.He_chortled_in_his_joy.Twas_brillig,and_the_slithy_toves,Did_gyre_and_gimble_in_the_wabe,All_mimsy_were_the_borogoves,And_the_mome-raths_outgrabe.' > $tmpdir/$pid.lq if (!~ ``(){cat $tmpdir/$pid.lw} ``(){cat $tmpdir/$pid.lq}) fail expected long string and long word to be identical if (! x=`{wc -c $tmpdir/$pid.lw} ~ $x(1) 1088) fail expected long word to be 1088 bytes if (! x=`{wc -c $tmpdir/$pid.lq} ~ $x(1) 1088) fail expected long quote to be 1088 bytes rm $tmpdir/$pid.lw rm $tmpdir/$pid.lq submatch 'echo hi |[2' 'rc: expected ''='' or '']'' after digit' 'scan error' submatch 'echo hi |[92=]' 'rc: expected digit after ''=''' 'scan error' submatch 'echo hi |[a]' 'rc: expected digit after ''[''' 'scan error' submatch 'echo hi |[2-' 'rc: expected ''='' or '']'' after digit' 'scan error' submatch 'echo hi |[2=99a]' 'rc: expected '']'' after digit' 'scan error' submatch 'echo hi |[2=a99]' 'rc: expected digit or '']'' after ''=''' 'scan error' submatch 'echo ''hi' 'rc: eof in quoted string' 'scan error' ifs='' { if (!~ 'h i' `{echo -n h\ i}) fail backslash-newline to space conversion if (!~ $rc^\rc `{echo -n $rc\rc}) fail backslash after variable name did not terminate variable name scan if (!~ $rc^' rc' `{echo -n $rc\ rc}) fail backslash-newline after variable name space conversion if (!~ 'h\i' `{echo -n h\i}) fail backslash in the middle of word if (!~ 'h \ i' `{echo -n h \ i}) fail free-standing backslash } if (! $rc -c '# eof in comment') fail eof in comment exited with nonzero status # test the syntax error printer prompt='' if (!~ `` $nl {$rc -cif>[2=1]} 'rc: line 1: '*' error near if') fail print syntax error prompt='' if (!~ `` $nl {$rc -icif>[2=1]} *' error') fail print syntax error # # builtins # fn foo { return sigfpe } foo if (!~ $status sigfpe) fail return builtin did not return sigfpe fn foo # test deleting of function fn bar { for (i in 1 2 3 4 5) if (~ $i 3) return } bar if (!~ $i 3) fail return inside loop inside function failed submatch return 'rc: return outside of function' 'return outside of function' submatch 'break 1' 'rc: too many arguments to break' 'break arg count' submatch break 'rc: break outside of loop' 'break outside of loop' for (i in 1 2 3 4 5) if (~ $i 2) break if (!~ $i 2) fail break out of loop submatch 'wait foo' 'rc: `foo'' is a bad number' 'bogus argument to wait' if (~ `{echo -n} ?) fail echo -n if (!~ `` '' {echo --} $nl) fail echo -- pwd=`/bin/pwd cdpath=/ { # some local assignments home=/tmp cd if (!~ `/bin/pwd `{sh -c 'cd /tmp; /bin/pwd'}) fail could not cd to '$home' cdpath=/ cd tmp if (!~ `/bin/pwd `{sh -c 'cd /tmp; /bin/pwd'}) fail could not cd to /tmp cd $pwd if (!~ `/bin/pwd `{sh -c 'cd $pwd; /bin/pwd'}) fail could not cd to current directory! } # Test that cd to a directory found via cdpath produces output # when interactive. submatch 'cdpath=/ cd tmp' /tmp 'cdpath produced wrong output' *=(1 2 3 4 5) { expect bad number shift foo expect arg count shift 1 2 3 expect shift overflow shift 123 shift 3 if (!~ $#* 2) fail shift 3 of '(1 2 3 4 5)' failed shift if (!~ $* 5) fail shift failed to shift left-to-right } false eval && fail null eval reset '$status' if (!~ `{rm=(); fn rm; path=(. /bin); whatis rm} /bin/rm) fail rm isn''''t in bin!? expect list of signal handlers whatis -s expect list of variables and functions whatis submatch 'whatis -x' 'whatis: bad option: -x' 'bad option to whatis' submatch 'whatis /frobnatz' '/frobnatz not found' 'search for /frobnatz' if (~ `{whatis limit >[2]/dev/null} builtin) { limit coredumpsize 0 if (!~ `{limit coredumpsize} 0*) fail failed to set coredumpsize to zero if (!~ `` () {limit coredumpsize} `` () {limit|grep coredumpsize}) fail limit limit submatch 'limit foo' 'no such limit' 'bad limit' } fn cd submatch 'cd a b c' 'rc: too many arguments to cd' 'cd arg count' $rc -c 'cdpath=() cd /frobnatz' >[2]/dev/null && fail 'cd to /frobnatz succeeded!?' submatch 'cdpath='''' cd frobnatz' 'couldn''t cd to frobnatz' 'cd to frobnatz succeeded!?' 'if'=keyword { {whatis if | fgrep '''if''=keyword' >/dev/null} || fail whatis of keyword is not quoted } # # wait # submatch 'wait 1 2 3' 'rc: too many arguments to wait' 'wait arg count' $rc -c 'wait 1' >[2]/dev/null && fail wait 1 sleep 3& expect $apid echo $apids wait if (~ `` '' {wait} ?) fail waiting for nothing # # matching # touch $tmpdir/abc.$pid $tmpdir/bbc.$pid mkdir $tmpdir/dir.$pid $tmpdir/dip.$pid touch $tmpdir/dir.$pid/^(a b c) $tmpdir/dip.$pid/^(a b c) if (!~ 123 [~x]?[0-9]) fail match if (!~ () *) fail match of null list with '*' if (~ () *v*) fail match of null list with '*v*' succeeded if (!~ (foo bar zar) *****z*****) fail match of list by one pattern failed if (~ (foo bar zar) *c*) fail bad match if (!~ [aaa [aaa) fail bad rangematch if (!~ ']' []]) fail match right bracket if (~ x [y]) fail rangematch out of range if (~ x x?) fail too many characters in pattern sh -c 'test -f /////$tmpdir//////a?c.'^$pid || fail glob with many slashes if (!~ /////$tmpdir//////a*.$pid /////$tmpdir//////a?c.$pid) fail glob with many slashes if (!~ ////$tmpdir////di?.$pid////* ////$tmpdir////dir.$pid////*b*) fail glob with more slashes if (! @{cd $tmpdir; ~ *.$pid/a d*/*}) fail glob in current directory if (!~ $tmpdir/?bc.$pid $tmpdir/bbc.$pid) fail match of bbc.$pid against '('abc.$pid bbc.$pid')' rm $tmpdir/abc.$pid $tmpdir/bbc.$pid rm -rf $tmpdir/dir.$pid $tmpdir/dip.$pid # # signals # fn sigint {eval} kill -2 $pid fn sigint # # path searching # $rc -c /frobnatz >[2]/dev/null && fail 'search error' touch $tmpdir/noexec.$pid chmod a-x $tmpdir/noexec.$pid $rc -c $tmpdir/noexec.$pid >[2]/dev/null && fail $tmpdir/noexec.$pid is found!? rm $tmpdir/noexec.$pid submatch 'path='''' frobnatz' 'rc: cannot find `frobnatz''' 'search error' {path=() /bin/sh -c 'exit 0'} || fail abs pathname with path set to null # # options # # this test is meaningless; not really a trip expect prompt, echo hi home=/frobnatz $rc -nolpeivdxc 'echo hi' if (!~ `` $nl {$rc -c>[2=1]} *': option requires an argument -- c') fail getopt on -c if (!~ `` $nl {$rc -q>[2=1]} *': bad option: -q') fail getopt on -q (bogus option) if (!~ `{echo '#echo' | $rc -v |[2] sed 's/#//'} echo) fail rc -v # # dot # if (~ `` '' . ?*) fail null dot if (~ `` '' {. -i} ?*) fail null dot -i cat > $tmpdir/dot.$pid << eof echo hi eof prompt=';' if (!~ `` '' {. -i $tmpdir/dot.$pid>[2=1]} ';hi'^$nl';') fail dot -i submatch .' '$tmpdir/dot.$pid hi dot rm $tmpdir/dot.$pid $rc -c '. /frobnatz' >[2]/dev/null && fail 'dot of a nonexistent file' # # stdin # if (!~ `{echo echo hi | $rc} hi) fail piping stdin to rc # # functions, variables & environment # fn --- {for(i)a|[2=3]b>>c<<[2=1]} if (whatis printenv >/dev/null>[2=1]) { printenv=printenv } else if (whatis env >/dev/null>[2=1]) { printenv=env } else printenv=() if (~ $#printenv 1 && !~ `` $nl {$printenv | grep fn___2d__2d__2d} 'fn___2d__2d__2d={for(i in $*)a|[2=3]b >>c <<[2=1]}') fail protect_env fn --- {replace} ~ `{whatis -- ---} *replace* || fail replace a function definition fn --- whatis -- --- >[2]/dev/null && fail function deletion foo=bar *=bar foo=nest *=nest { ~ $foo nest || fail local assignment ~ $* nest || fail local assignment to '$*' foo=() *=() ~ $foo () || fail local deletion ~ $* () || fail local deletion to '$*' } ~ $foo bar || fail restore of global after local group ~ $* bar || fail restore of '$*' after local group ~ `{exec>[2=1];$rc -xc 'foo=()'} 'foo=()' || fail -x echo of variable deletion fn_ff='{' prompt='' if (!~ `` $nl {$rc -cff>[2=1]} 'rc: line 1: '*' error near eof') fail 'bogus function in environment' # # statuses # ~ `{$rc -ec 'sleep 10&kill -9 $apid;wait'>[2=1]} killed || fail status diagnostic $rc -c 'exit 0 sigfpe' && fail exit of bad pipeline is true submatch 'exit foo' 'bad status' 'exit diagnostic' # # control structures # if (!~ `{false || echo hi} hi) fail '||' if (!~ `{true && echo hi} hi) fail '&&' if (~ `{true || echo hi} hi) fail '||' if (~ `{false && echo hi} hi) fail '&&' while (false) fail false while while (true) { break fail break in while } switch (foo) { case bar fail matched bar in switch case foo eval case * fail match foo in switch } switch (nothing) { case bar fail matched bar in switch case * i=frobnatz } ~ $i frobnatz || fail match '*' in switch submatch '()=()' 'rc: null variable name' 'assignment diagnostic' submatch 'fn () {eval}' 'rc: null function name' 'assigning null function name' # # prompt # fn prompt {echo hi} prompt=() if (!~ `{$rc -i /dev/null>[2]/dev/null} hi) fail fn prompt fn prompt # # history # history=$tmpdir/hist.$pid prompt='' echo 'history=()' | $rc -i if (!~ `{cat $tmpdir/hist.$pid} 'history=()') fail output to history file history=$tmpdir/hist.$pid prompt='' echo 'history=()' | $rc -i if (!~ `` () {cat $tmpdir/hist.$pid} 'history=() history=() ') fail append to history file rm $tmpdir/hist.$pid if (!~ `{history=/frobnatz/foo prompt='' echo eval | $rc -i >[2=1]} ?*) fail accessing bad history file # # regression # expect date { date & wait } |cat # Making rc's input non-blocking should have no untoward side effects. x=`{ { sleep 1; echo echo foo } | { ./tripping n; $rc >[2=1] } } if (!~ foo $x) fail input file descriptor nonblocking # `rc -s' reads from stdin, but should not imply `-i' expect foo bar qux $rc -s foo bar qux <<'eof' echo $* eof # Believe it or not, I broke root directory globbing in rc-1.6b1. x=/* ~ '/*' $^x && fail root directory globbing # fn sigexit should be cleared in children x = () expect rc: cannot find '`nonesuch''' x = `{true | nonesuch}; if (~ $x trip) fail sigexit in children x = `{ < /dev/null wc |grep xxx }; if (~ $x trip) fail sigexit in children x = `{{ wc | wc } < /dev/null }; if (~ $x trip) fail sigexit in children # core dumps in glob.c ~ () '*' && fail globber problem ~ () '**' && fail globber problem # check for ctrl-a bug x=`{./tripping a} ~ `{$rc -c 'echo $x'} $x || fail ctrl-a bug detected # check for hilarious quoting bug introduced while fixing ctrl-a x=('#' '#' '#') eval z^`{whatis -v x} ~ $#zx 3 || fail hilarious quoting bug # parens bypass quote detector bug fn x {echo x.y $(x.y)} ~ ``''{whatis -f x} 'fn x {echo x.y $(x^.y)} ' || fail sneaky parens bug # before rc-1.7.1, certain glob patterns could fail on broken symlinks mkdir $tmpdir/qux ln -s /frobnatz $tmpdir/qux/foo x=$tmpdir/qux/foo* ~ $x $tmpdir/qux/foo || { rm -rf $tmpdir/qux; fail broken symlink globbing } x=$tmpdir/qux*/foo ~ $x $tmpdir/qux/foo || { rm -rf $tmpdir/qux; fail broken symlink globbing } rm -rf $tmpdir rc-1.7.4/edit-null.c0000644000175000017500000000113512515531750011115 00000000000000#include "rc.h" #include #include #include "edit.h" bool editing = 0; void *edit_begin(int fd) { assert(0); /* should never be called */ return NULL; } char *edit_alloc(void *cookie, size_t *count) { assert(0); /* should never be called */ return NULL; } void edit_prompt(void *cookie, char *prompt) { assert(0); /* should never be called */ } void edit_free(void *buffer) { assert(0); /* should never be called */ } void edit_end(void *cookie) { assert(0); /* should never be called */ } void edit_reset(void *cookie) { assert(0); /* should never be called */ } rc-1.7.4/depcomp0000755000175000017500000005601612404036304010431 00000000000000#! /bin/sh # depcomp - compile a program generating dependencies as side-effects scriptversion=2013-05-30.07; # UTC # Copyright (C) 1999-2013 Free Software Foundation, Inc. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, or (at your option) # any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program. If not, see . # As a special exception to the GNU General Public License, if you # distribute this file as part of a program that contains a # configuration script generated by Autoconf, you may include it under # the same distribution terms that you use for the rest of that program. # Originally written by Alexandre Oliva . case $1 in '') echo "$0: No command. Try '$0 --help' for more information." 1>&2 exit 1; ;; -h | --h*) cat <<\EOF Usage: depcomp [--help] [--version] PROGRAM [ARGS] Run PROGRAMS ARGS to compile a file, generating dependencies as side-effects. Environment variables: depmode Dependency tracking mode. source Source file read by 'PROGRAMS ARGS'. object Object file output by 'PROGRAMS ARGS'. DEPDIR directory where to store dependencies. depfile Dependency file to output. tmpdepfile Temporary file to use when outputting dependencies. libtool Whether libtool is used (yes/no). Report bugs to . EOF exit $? ;; -v | --v*) echo "depcomp $scriptversion" exit $? ;; esac # Get the directory component of the given path, and save it in the # global variables '$dir'. Note that this directory component will # be either empty or ending with a '/' character. This is deliberate. set_dir_from () { case $1 in */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;; *) dir=;; esac } # Get the suffix-stripped basename of the given path, and save it the # global variable '$base'. set_base_from () { base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'` } # If no dependency file was actually created by the compiler invocation, # we still have to create a dummy depfile, to avoid errors with the # Makefile "include basename.Plo" scheme. make_dummy_depfile () { echo "#dummy" > "$depfile" } # Factor out some common post-processing of the generated depfile. # Requires the auxiliary global variable '$tmpdepfile' to be set. aix_post_process_depfile () { # If the compiler actually managed to produce a dependency file, # post-process it. if test -f "$tmpdepfile"; then # Each line is of the form 'foo.o: dependency.h'. # Do two passes, one to just change these to # $object: dependency.h # and one to simply output # dependency.h: # which is needed to avoid the deleted-header problem. { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile" sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile" } > "$depfile" rm -f "$tmpdepfile" else make_dummy_depfile fi } # A tabulation character. tab=' ' # A newline character. nl=' ' # Character ranges might be problematic outside the C locale. # These definitions help. upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ lower=abcdefghijklmnopqrstuvwxyz digits=0123456789 alpha=${upper}${lower} if test -z "$depmode" || test -z "$source" || test -z "$object"; then echo "depcomp: Variables source, object and depmode must be set" 1>&2 exit 1 fi # Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po. depfile=${depfile-`echo "$object" | sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`} tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`} rm -f "$tmpdepfile" # Avoid interferences from the environment. gccflag= dashmflag= # Some modes work just like other modes, but use different flags. We # parameterize here, but still list the modes in the big case below, # to make depend.m4 easier to write. Note that we *cannot* use a case # here, because this file can only contain one case statement. if test "$depmode" = hp; then # HP compiler uses -M and no extra arg. gccflag=-M depmode=gcc fi if test "$depmode" = dashXmstdout; then # This is just like dashmstdout with a different argument. dashmflag=-xM depmode=dashmstdout fi cygpath_u="cygpath -u -f -" if test "$depmode" = msvcmsys; then # This is just like msvisualcpp but w/o cygpath translation. # Just convert the backslash-escaped backslashes to single forward # slashes to satisfy depend.m4 cygpath_u='sed s,\\\\,/,g' depmode=msvisualcpp fi if test "$depmode" = msvc7msys; then # This is just like msvc7 but w/o cygpath translation. # Just convert the backslash-escaped backslashes to single forward # slashes to satisfy depend.m4 cygpath_u='sed s,\\\\,/,g' depmode=msvc7 fi if test "$depmode" = xlc; then # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information. gccflag=-qmakedep=gcc,-MF depmode=gcc fi case "$depmode" in gcc3) ## gcc 3 implements dependency tracking that does exactly what ## we want. Yay! Note: for some reason libtool 1.4 doesn't like ## it if -MD -MP comes after the -MF stuff. Hmm. ## Unfortunately, FreeBSD c89 acceptance of flags depends upon ## the command line argument order; so add the flags where they ## appear in depend2.am. Note that the slowdown incurred here ## affects only configure: in makefiles, %FASTDEP% shortcuts this. for arg do case $arg in -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;; *) set fnord "$@" "$arg" ;; esac shift # fnord shift # $arg done "$@" stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi mv "$tmpdepfile" "$depfile" ;; gcc) ## Note that this doesn't just cater to obsosete pre-3.x GCC compilers. ## but also to in-use compilers like IMB xlc/xlC and the HP C compiler. ## (see the conditional assignment to $gccflag above). ## There are various ways to get dependency output from gcc. Here's ## why we pick this rather obscure method: ## - Don't want to use -MD because we'd like the dependencies to end ## up in a subdir. Having to rename by hand is ugly. ## (We might end up doing this anyway to support other compilers.) ## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like ## -MM, not -M (despite what the docs say). Also, it might not be ## supported by the other compilers which use the 'gcc' depmode. ## - Using -M directly means running the compiler twice (even worse ## than renaming). if test -z "$gccflag"; then gccflag=-MD, fi "$@" -Wp,"$gccflag$tmpdepfile" stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" echo "$object : \\" > "$depfile" # The second -e expression handles DOS-style file names with drive # letters. sed -e 's/^[^:]*: / /' \ -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile" ## This next piece of magic avoids the "deleted header file" problem. ## The problem is that when a header file which appears in a .P file ## is deleted, the dependency causes make to die (because there is ## typically no way to rebuild the header). We avoid this by adding ## dummy dependencies for each header file. Too bad gcc doesn't do ## this for us directly. ## Some versions of gcc put a space before the ':'. On the theory ## that the space means something, we add a space to the output as ## well. hp depmode also adds that space, but also prefixes the VPATH ## to the object. Take care to not repeat it in the output. ## Some versions of the HPUX 10.20 sed can't process this invocation ## correctly. Breaking it into two sed invocations is a workaround. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \ | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; hp) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; sgi) if test "$libtool" = yes; then "$@" "-Wp,-MDupdate,$tmpdepfile" else "$@" -MDupdate "$tmpdepfile" fi stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" if test -f "$tmpdepfile"; then # yes, the sourcefile depend on other files echo "$object : \\" > "$depfile" # Clip off the initial element (the dependent). Don't try to be # clever and replace this with sed code, as IRIX sed won't handle # lines with more than a fixed number of characters (4096 in # IRIX 6.2 sed, 8192 in IRIX 6.5). We also remove comment lines; # the IRIX cc adds comments like '#:fec' to the end of the # dependency line. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \ | tr "$nl" ' ' >> "$depfile" echo >> "$depfile" # The second pass generates a dummy entry for each header file. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \ >> "$depfile" else make_dummy_depfile fi rm -f "$tmpdepfile" ;; xlc) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; aix) # The C for AIX Compiler uses -M and outputs the dependencies # in a .u file. In older versions, this file always lives in the # current directory. Also, the AIX compiler puts '$object:' at the # start of each line; $object doesn't have directory information. # Version 6 uses the directory in both cases. set_dir_from "$object" set_base_from "$object" if test "$libtool" = yes; then tmpdepfile1=$dir$base.u tmpdepfile2=$base.u tmpdepfile3=$dir.libs/$base.u "$@" -Wc,-M else tmpdepfile1=$dir$base.u tmpdepfile2=$dir$base.u tmpdepfile3=$dir$base.u "$@" -M fi stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" exit $stat fi for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" do test -f "$tmpdepfile" && break done aix_post_process_depfile ;; tcc) # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26 # FIXME: That version still under development at the moment of writing. # Make that this statement remains true also for stable, released # versions. # It will wrap lines (doesn't matter whether long or short) with a # trailing '\', as in: # # foo.o : \ # foo.c \ # foo.h \ # # It will put a trailing '\' even on the last line, and will use leading # spaces rather than leading tabs (at least since its commit 0394caf7 # "Emit spaces for -MD"). "$@" -MD -MF "$tmpdepfile" stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'. # We have to change lines of the first kind to '$object: \'. sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile" # And for each line of the second kind, we have to emit a 'dep.h:' # dummy dependency, to avoid the deleted-header problem. sed -n -e 's|^ *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile" rm -f "$tmpdepfile" ;; ## The order of this option in the case statement is important, since the ## shell code in configure will try each of these formats in the order ## listed in this file. A plain '-MD' option would be understood by many ## compilers, so we must ensure this comes after the gcc and icc options. pgcc) # Portland's C compiler understands '-MD'. # Will always output deps to 'file.d' where file is the root name of the # source file under compilation, even if file resides in a subdirectory. # The object file name does not affect the name of the '.d' file. # pgcc 10.2 will output # foo.o: sub/foo.c sub/foo.h # and will wrap long lines using '\' : # foo.o: sub/foo.c ... \ # sub/foo.h ... \ # ... set_dir_from "$object" # Use the source, not the object, to determine the base name, since # that's sadly what pgcc will do too. set_base_from "$source" tmpdepfile=$base.d # For projects that build the same source file twice into different object # files, the pgcc approach of using the *source* file root name can cause # problems in parallel builds. Use a locking strategy to avoid stomping on # the same $tmpdepfile. lockdir=$base.d-lock trap " echo '$0: caught signal, cleaning up...' >&2 rmdir '$lockdir' exit 1 " 1 2 13 15 numtries=100 i=$numtries while test $i -gt 0; do # mkdir is a portable test-and-set. if mkdir "$lockdir" 2>/dev/null; then # This process acquired the lock. "$@" -MD stat=$? # Release the lock. rmdir "$lockdir" break else # If the lock is being held by a different process, wait # until the winning process is done or we timeout. while test -d "$lockdir" && test $i -gt 0; do sleep 1 i=`expr $i - 1` done fi i=`expr $i - 1` done trap - 1 2 13 15 if test $i -le 0; then echo "$0: failed to acquire lock after $numtries attempts" >&2 echo "$0: check lockdir '$lockdir'" >&2 exit 1 fi if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" # Each line is of the form `foo.o: dependent.h', # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'. # Do two passes, one to just change these to # `$object: dependent.h' and one to simply `dependent.h:'. sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile" # Some versions of the HPUX 10.20 sed can't process this invocation # correctly. Breaking it into two sed invocations is a workaround. sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \ | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; hp2) # The "hp" stanza above does not work with aCC (C++) and HP's ia64 # compilers, which have integrated preprocessors. The correct option # to use with these is +Maked; it writes dependencies to a file named # 'foo.d', which lands next to the object file, wherever that # happens to be. # Much of this is similar to the tru64 case; see comments there. set_dir_from "$object" set_base_from "$object" if test "$libtool" = yes; then tmpdepfile1=$dir$base.d tmpdepfile2=$dir.libs/$base.d "$@" -Wc,+Maked else tmpdepfile1=$dir$base.d tmpdepfile2=$dir$base.d "$@" +Maked fi stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile1" "$tmpdepfile2" exit $stat fi for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" do test -f "$tmpdepfile" && break done if test -f "$tmpdepfile"; then sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile" # Add 'dependent.h:' lines. sed -ne '2,${ s/^ *// s/ \\*$// s/$/:/ p }' "$tmpdepfile" >> "$depfile" else make_dummy_depfile fi rm -f "$tmpdepfile" "$tmpdepfile2" ;; tru64) # The Tru64 compiler uses -MD to generate dependencies as a side # effect. 'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'. # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put # dependencies in 'foo.d' instead, so we check for that too. # Subdirectories are respected. set_dir_from "$object" set_base_from "$object" if test "$libtool" = yes; then # Libtool generates 2 separate objects for the 2 libraries. These # two compilations output dependencies in $dir.libs/$base.o.d and # in $dir$base.o.d. We have to check for both files, because # one of the two compilations can be disabled. We should prefer # $dir$base.o.d over $dir.libs/$base.o.d because the latter is # automatically cleaned when .libs/ is deleted, while ignoring # the former would cause a distcleancheck panic. tmpdepfile1=$dir$base.o.d # libtool 1.5 tmpdepfile2=$dir.libs/$base.o.d # Likewise. tmpdepfile3=$dir.libs/$base.d # Compaq CCC V6.2-504 "$@" -Wc,-MD else tmpdepfile1=$dir$base.d tmpdepfile2=$dir$base.d tmpdepfile3=$dir$base.d "$@" -MD fi stat=$? if test $stat -ne 0; then rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" exit $stat fi for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" do test -f "$tmpdepfile" && break done # Same post-processing that is required for AIX mode. aix_post_process_depfile ;; msvc7) if test "$libtool" = yes; then showIncludes=-Wc,-showIncludes else showIncludes=-showIncludes fi "$@" $showIncludes > "$tmpdepfile" stat=$? grep -v '^Note: including file: ' "$tmpdepfile" if test $stat -ne 0; then rm -f "$tmpdepfile" exit $stat fi rm -f "$depfile" echo "$object : \\" > "$depfile" # The first sed program below extracts the file names and escapes # backslashes for cygpath. The second sed program outputs the file # name when reading, but also accumulates all include files in the # hold buffer in order to output them again at the end. This only # works with sed implementations that can handle large buffers. sed < "$tmpdepfile" -n ' /^Note: including file: *\(.*\)/ { s//\1/ s/\\/\\\\/g p }' | $cygpath_u | sort -u | sed -n ' s/ /\\ /g s/\(.*\)/'"$tab"'\1 \\/p s/.\(.*\) \\/\1:/ H $ { s/.*/'"$tab"'/ G p }' >> "$depfile" echo >> "$depfile" # make sure the fragment doesn't end with a backslash rm -f "$tmpdepfile" ;; msvc7msys) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; #nosideeffect) # This comment above is used by automake to tell side-effect # dependency tracking mechanisms from slower ones. dashmstdout) # Important note: in order to support this mode, a compiler *must* # always write the preprocessed file to stdout, regardless of -o. "$@" || exit $? # Remove the call to Libtool. if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi # Remove '-o $object'. IFS=" " for arg do case $arg in -o) shift ;; $object) shift ;; *) set fnord "$@" "$arg" shift # fnord shift # $arg ;; esac done test -z "$dashmflag" && dashmflag=-M # Require at least two characters before searching for ':' # in the target name. This is to cope with DOS-style filenames: # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise. "$@" $dashmflag | sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile" rm -f "$depfile" cat < "$tmpdepfile" > "$depfile" # Some versions of the HPUX 10.20 sed can't process this sed invocation # correctly. Breaking it into two sed invocations is a workaround. tr ' ' "$nl" < "$tmpdepfile" \ | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \ | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; dashXmstdout) # This case only exists to satisfy depend.m4. It is never actually # run, as this mode is specially recognized in the preamble. exit 1 ;; makedepend) "$@" || exit $? # Remove any Libtool call if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi # X makedepend shift cleared=no eat=no for arg do case $cleared in no) set ""; shift cleared=yes ;; esac if test $eat = yes; then eat=no continue fi case "$arg" in -D*|-I*) set fnord "$@" "$arg"; shift ;; # Strip any option that makedepend may not understand. Remove # the object too, otherwise makedepend will parse it as a source file. -arch) eat=yes ;; -*|$object) ;; *) set fnord "$@" "$arg"; shift ;; esac done obj_suffix=`echo "$object" | sed 's/^.*\././'` touch "$tmpdepfile" ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@" rm -f "$depfile" # makedepend may prepend the VPATH from the source file name to the object. # No need to regex-escape $object, excess matching of '.' is harmless. sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile" # Some versions of the HPUX 10.20 sed can't process the last invocation # correctly. Breaking it into two sed invocations is a workaround. sed '1,2d' "$tmpdepfile" \ | tr ' ' "$nl" \ | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \ | sed -e 's/$/ :/' >> "$depfile" rm -f "$tmpdepfile" "$tmpdepfile".bak ;; cpp) # Important note: in order to support this mode, a compiler *must* # always write the preprocessed file to stdout. "$@" || exit $? # Remove the call to Libtool. if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi # Remove '-o $object'. IFS=" " for arg do case $arg in -o) shift ;; $object) shift ;; *) set fnord "$@" "$arg" shift # fnord shift # $arg ;; esac done "$@" -E \ | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \ -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \ | sed '$ s: \\$::' > "$tmpdepfile" rm -f "$depfile" echo "$object : \\" > "$depfile" cat < "$tmpdepfile" >> "$depfile" sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile" rm -f "$tmpdepfile" ;; msvisualcpp) # Important note: in order to support this mode, a compiler *must* # always write the preprocessed file to stdout. "$@" || exit $? # Remove the call to Libtool. if test "$libtool" = yes; then while test "X$1" != 'X--mode=compile'; do shift done shift fi IFS=" " for arg do case "$arg" in -o) shift ;; $object) shift ;; "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI") set fnord "$@" shift shift ;; *) set fnord "$@" "$arg" shift shift ;; esac done "$@" -E 2>/dev/null | sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile" rm -f "$depfile" echo "$object : \\" > "$depfile" sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile" echo "$tab" >> "$depfile" sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile" rm -f "$tmpdepfile" ;; msvcmsys) # This case exists only to let depend.m4 do its work. It works by # looking at the text of this script. This case will never be run, # since it is checked for above. exit 1 ;; none) exec "$@" ;; *) echo "Unknown depmode $depmode" 1>&2 exit 1 ;; esac exit 0 # Local Variables: # mode: shell-script # sh-indentation: 2 # eval: (add-hook 'write-file-hooks 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-time-zone: "UTC" # time-stamp-end: "; # UTC" # End: rc-1.7.4/utils.c0000644000175000017500000000331312515531750010360 00000000000000/* utils.c: functions of general utility */ #include "rc.h" #include #include #include "jbwrap.h" /* print error with line number on noninteractive shells (i.e., scripts) */ extern void pr_error(char *s, int offset) { if (s != NULL) { if (interactive) fprint(2, RC "%s\n", s); else fprint(2, RC "line %d: %s\n", lineno + offset, s); } } /* our perror */ extern void uerror(char *s) { char *err; err = strerror(errno); if (!err) err = "unknown error"; if (s) fprint(2, RC "%s: %s\n", s, err); else fprint(2, RC "%s\n", err); } /* Die horribly. This should never get called. Please let me know if it does. */ #define PANICMSG "rc panic: " extern void panic(char *s) { write(2, PANICMSG, conststrlen(PANICMSG)); write(2, s, strlen(s)); write(2, "!\n", 2); exit(1); } /* ascii -> unsigned conversion routines. -1 indicates conversion error. */ extern int n2u(char *s, unsigned int base) { unsigned int i; for (i = 0; *s != '\0'; s++) { unsigned int j = (unsigned int) *s - '0'; if (j >= base) /* small hack with unsigned ints -- one compare for range test */ return -1; i = i * base + j; } return (int) i; } /* The last word in portable ANSI: a strcmp wrapper for qsort */ extern int starstrcmp(const void *s1, const void *s2) { return strcmp(*(char * const *)s1, *(char * const *)s2); } /* tests to see if pathname begins with "/", "./", or "../" */ extern bool isabsolute(char *path) { return path[0] == '/' || (path[0] == '.' && (path[1] == '/' || (path[1] == '.' && path[2] == '/'))); } /* duplicate a fd and close the old one only if necessary */ extern int mvfd(int i, int j) { if (i != j) { int s = dup2(i, j); close(i); return s; } return 0; } rc-1.7.4/README0000644000175000017500000000172112524740025007732 00000000000000This is release rc-1.7.4. See COPYING for copying information. All files are Copyright 1991, 1999, 2001-2003, 2014, 2015 Byron Rakitzis. See INSTALL for build and installation information. BUGS Send bug reports to . If a core dump is generated, sending a backtrace will help a great deal. You can get a backtrace like this. ; gdb rc core (gdb) where <<>> (gdb) Also, always report the machine, OS (`uname -a'), and compiler used to make rc; this information is extremely valuable. FEEPING CREATURISM See the end of the man page, under "INCOMPATIBILITIES" for (known?) differences from the "real" rc. Most of these changes were necessary to get rc to work in a reasonable fashion on a real (i.e. commercial, non-Labs) Unix system; a few were changes motivated by concern about some inadequacies in the original design. WWW More information on releases of rc can be found at this web page. http://tobold.org/article/rc rc-1.7.4/walk.c0000644000175000017500000002043412507445074010165 00000000000000/* walk.c: walks the parse tree. */ #include "rc.h" #include #include #include "jbwrap.h" /* global which indicates whether rc is executing a test; used by rc -e so that if (false) does not exit. */ bool cond = FALSE; static bool haspreredir(Node *); static bool isallpre(Node *); static bool dofork(bool); static void dopipe(Node *); /* Tail-recursive version of walk() */ #define WALK(x, y) { n = x; parent = y; goto top; } /* walk the parse-tree. "obvious". */ extern bool walk(Node *n, bool parent) { top: sigchk(); if (n == NULL) { if (!parent) exit(0); set(TRUE); return TRUE; } switch (n->type) { case nArgs: case nBackq: case nConcat: case nCount: case nFlat: case nLappend: case nRedir: case nVar: case nVarsub: case nWord: exec(glob(glom(n)), parent); /* simple command */ break; case nBody: walk(n->u[0].p, TRUE); WALK(n->u[1].p, parent); /* WALK doesn't fall through */ case nNowait: { int pid; if ((pid = rc_fork()) == 0) { #if defined(RC_JOB) && defined(SIGTTOU) && defined(SIGTTIN) && defined(SIGTSTP) setsigdefaults(FALSE); rc_signal(SIGTTOU, SIG_IGN); /* Berkeleyized version: put it in a new pgroup. */ rc_signal(SIGTTIN, SIG_IGN); rc_signal(SIGTSTP, SIG_IGN); setpgid(0, getpid()); #else setsigdefaults(TRUE); /* ignore SIGINT, SIGQUIT, SIGTERM */ #endif mvfd(rc_open("/dev/null", rFrom), 0); walk(n->u[0].p, FALSE); exit(getstatus()); } if (interactive) fprint(2, "%d\n", pid); varassign("apid", word(nprint("%d", pid), NULL), FALSE); redirq = NULL; /* kill pre-redir queue */ break; } case nAndalso: { bool oldcond = cond; cond = TRUE; if (walk(n->u[0].p, TRUE)) { cond = oldcond; WALK(n->u[1].p, parent); } else cond = oldcond; break; } case nOrelse: { bool oldcond = cond; cond = TRUE; if (!walk(n->u[0].p, TRUE)) { cond = oldcond; WALK(n->u[1].p, parent); } else cond = oldcond; break; } case nBang: set(!walk(n->u[0].p, TRUE)); break; case nIf: { bool oldcond = cond; Node *true_cmd = n->u[1].p, *false_cmd = NULL; if (true_cmd != NULL && true_cmd->type == nElse) { false_cmd = true_cmd->u[1].p; true_cmd = true_cmd->u[0].p; } cond = TRUE; if (!walk(n->u[0].p, TRUE)) true_cmd = false_cmd; /* run the else clause */ cond = oldcond; WALK(true_cmd, parent); } case nWhile: { Jbwrap j; Edata jbreak; Estack e1, e2; bool testtrue, oldcond = cond; cond = TRUE; if (!walk(n->u[0].p, TRUE)) { /* prevent spurious breaks inside test */ cond = oldcond; break; } if (sigsetjmp(j.j, 1)) break; jbreak.jb = &j; except(eBreak, jbreak, &e1); do { Edata block; block.b = newblock(); cond = oldcond; except(eArena, block, &e2); walk(n->u[1].p, TRUE); testtrue = walk(n->u[0].p, TRUE); unexcept(); /* eArena */ cond = TRUE; } while (testtrue); cond = oldcond; unexcept(); /* eBreak */ break; } case nForin: { List *l, *var = glom(n->u[0].p); Jbwrap j; Estack e1, e2; Edata jbreak; if (sigsetjmp(j.j, 1)) break; jbreak.jb = &j; except(eBreak, jbreak, &e1); for (l = listcpy(glob(glom(n->u[1].p)), nalloc); l != NULL; l = l->n) { Edata block; assign(var, word(l->w, NULL), FALSE); block.b = newblock(); except(eArena, block, &e2); walk(n->u[2].p, TRUE); unexcept(); /* eArena */ } unexcept(); /* eBreak */ break; } case nSubshell: if (dofork(TRUE)) { setsigdefaults(FALSE); walk(n->u[0].p, FALSE); rc_exit(getstatus()); } break; case nAssign: if (n->u[0].p == NULL) rc_error("null variable name"); assign(glom(n->u[0].p), glob(glom(n->u[1].p)), FALSE); set(TRUE); break; case nPipe: dopipe(n); break; case nNewfn: { List *l = glom(n->u[0].p); if (l == NULL) rc_error("null function name"); while (l != NULL) { if (dashex) prettyprint_fn(2, l->w, n->u[1].p); fnassign(l->w, n->u[1].p); l = l->n; } set(TRUE); break; } case nRmfn: { List *l = glom(n->u[0].p); while (l != NULL) { if (dashex) fprint(2, "fn %S\n", l->w); fnrm(l->w); l = l->n; } set(TRUE); break; } case nDup: redirq = NULL; break; /* Null command */ case nMatch: { List *a = glob(glom(n->u[0].p)), *b = glom(n->u[1].p); if (dashex) fprint(2, (a != NULL && a->n != NULL) ? "~ (%L) %L\n" : "~ %L %L\n", a, " ", b, " "); set(lmatch(a, b)); break; } case nSwitch: { List *v = glom(n->u[0].p); while (1) { do { n = n->u[1].p; if (n == NULL) return istrue(); } while (n->u[0].p == NULL || n->u[0].p->type != nCase); if (lmatch(v, glom(n->u[0].p->u[0].p))) { for (n = n->u[1].p; n != NULL && (n->u[0].p == NULL || n->u[0].p->type != nCase); n = n->u[1].p) walk(n->u[0].p, TRUE); break; } } break; } case nPre: { List *v; if (n->u[0].p->type == nRedir || n->u[0].p->type == nDup) { if (redirq == NULL && !dofork(parent)) /* subshell on first preredir */ break; setsigdefaults(FALSE); qredir(n->u[0].p); if (!haspreredir(n->u[1].p)) doredirs(); /* no more preredirs, empty queue */ walk(n->u[1].p, FALSE); rc_exit(getstatus()); /* NOTREACHED */ } else if (n->u[0].p->type == nAssign) { if (isallpre(n->u[1].p)) { walk(n->u[0].p, TRUE); WALK(n->u[1].p, parent); } else { Estack e; Edata var; v = glom(n->u[0].p->u[0].p); assign(v, glob(glom(n->u[0].p->u[1].p)), TRUE); var.name = v->w; except(eVarstack, var, &e); walk(n->u[1].p, parent); varrm(v->w, TRUE); unexcept(); /* eVarstack */ } } else panic("unexpected node in preredir section of walk"); break; } case nBrace: if (n->u[1].p == NULL) { WALK(n->u[0].p, parent); } else if (dofork(parent)) { setsigdefaults(FALSE); walk(n->u[1].p, TRUE); /* Do redirections */ redirq = NULL; /* Reset redirection queue */ walk(n->u[0].p, FALSE); /* Do commands */ rc_exit(getstatus()); /* NOTREACHED */ } break; case nEpilog: qredir(n->u[0].p); if (n->u[1].p != NULL) { WALK(n->u[1].p, parent); /* Do more redirections. */ } else { doredirs(); /* Okay, we hit the bottom. */ } break; case nNmpipe: rc_error("named pipes cannot be executed as commands"); /* NOTREACHED */ default: panic("unknown node in walk"); /* NOTREACHED */ } return istrue(); } /* checks to see whether there are any pre-redirections left in the tree */ static bool haspreredir(Node *n) { while (n != NULL && n->type == nPre) { if (n->u[0].p->type == nDup || n->u[0].p->type == nRedir) return TRUE; n = n->u[1].p; } return FALSE; } /* checks to see whether a subtree is all pre-command directives, i.e., assignments and redirs only */ static bool isallpre(Node *n) { while (n != NULL && n->type == nPre) n = n->u[1].p; return n == NULL || n->type == nRedir || n->type == nAssign || n->type == nDup; } /* A code-saver. Forks, child returns (for further processing in walk()), and the parent waits for the child to finish, setting $status appropriately. */ static bool dofork(bool parent) { int pid, sp; if (!parent || (pid = rc_fork()) == 0) return TRUE; redirq = NULL; /* clear out the pre-redirection queue in the parent */ rc_wait4(pid, &sp, TRUE); setstatus(-1, sp); sigchk(); return FALSE; } static void dopipe(Node *n) { int i, j, sp, pid, fd_prev, fd_out, pids[512], stats[512], p[2]; bool intr; Node *r; fd_prev = fd_out = 1; for (r = n, i = 0; r != NULL && r->type == nPipe; r = r->u[2].p, i++) { if (i > 500) /* the only hard-wired limit in rc? */ rc_error("pipe too long"); if (pipe(p) < 0) { uerror("pipe"); rc_error(NULL); } if ((pid = rc_fork()) == 0) { setsigdefaults(FALSE); redirq = NULL; /* clear preredir queue */ mvfd(p[0], r->u[1].i); if (fd_prev != 1) mvfd(fd_prev, fd_out); close(p[1]); walk(r->u[3].p, FALSE); exit(getstatus()); } if (fd_prev != 1) close(fd_prev); /* parent must close all pipe fd's */ pids[i] = pid; fd_prev = p[1]; fd_out = r->u[0].i; close(p[0]); } if ((pid = rc_fork()) == 0) { setsigdefaults(FALSE); mvfd(fd_prev, fd_out); walk(r, FALSE); exit(getstatus()); /* NOTREACHED */ } redirq = NULL; /* clear preredir queue */ close(fd_prev); pids[i++] = pid; /* collect statuses */ intr = FALSE; for (j = 0; j < i; j++) { rc_wait4(pids[j], &sp, TRUE); stats[j] = sp; intr |= (sp == SIGINT); } setpipestatus(stats, i); sigchk(); } rc-1.7.4/mkinstalldirs0000755000175000017500000000672212515531750011671 00000000000000#! /bin/sh # mkinstalldirs --- make directory hierarchy scriptversion=2009-04-28.21; # UTC # Original author: Noah Friedman # Created: 1993-05-16 # Public domain. # # This file is maintained in Automake, please report # bugs to or send patches to # . nl=' ' IFS=" "" $nl" errstatus=0 dirmode= usage="\ Usage: mkinstalldirs [-h] [--help] [--version] [-m MODE] DIR ... Create each directory DIR (with mode MODE, if specified), including all leading file name components. Report bugs to ." # process command line arguments while test $# -gt 0 ; do case $1 in -h | --help | --h*) # -h for help echo "$usage" exit $? ;; -m) # -m PERM arg shift test $# -eq 0 && { echo "$usage" 1>&2; exit 1; } dirmode=$1 shift ;; --version) echo "$0 $scriptversion" exit $? ;; --) # stop option processing shift break ;; -*) # unknown option echo "$usage" 1>&2 exit 1 ;; *) # first non-opt arg break ;; esac done for file do if test -d "$file"; then shift else break fi done case $# in 0) exit 0 ;; esac # Solaris 8's mkdir -p isn't thread-safe. If you mkdir -p a/b and # mkdir -p a/c at the same time, both will detect that a is missing, # one will create a, then the other will try to create a and die with # a "File exists" error. This is a problem when calling mkinstalldirs # from a parallel make. We use --version in the probe to restrict # ourselves to GNU mkdir, which is thread-safe. case $dirmode in '') if mkdir -p --version . >/dev/null 2>&1 && test ! -d ./--version; then echo "mkdir -p -- $*" exec mkdir -p -- "$@" else # On NextStep and OpenStep, the 'mkdir' command does not # recognize any option. It will interpret all options as # directories to create, and then abort because '.' already # exists. test -d ./-p && rmdir ./-p test -d ./--version && rmdir ./--version fi ;; *) if mkdir -m "$dirmode" -p --version . >/dev/null 2>&1 && test ! -d ./--version; then echo "mkdir -m $dirmode -p -- $*" exec mkdir -m "$dirmode" -p -- "$@" else # Clean up after NextStep and OpenStep mkdir. for d in ./-m ./-p ./--version "./$dirmode"; do test -d $d && rmdir $d done fi ;; esac for file do case $file in /*) pathcomp=/ ;; *) pathcomp= ;; esac oIFS=$IFS IFS=/ set fnord $file shift IFS=$oIFS for d do test "x$d" = x && continue pathcomp=$pathcomp$d case $pathcomp in -*) pathcomp=./$pathcomp ;; esac if test ! -d "$pathcomp"; then echo "mkdir $pathcomp" mkdir "$pathcomp" || lasterr=$? if test ! -d "$pathcomp"; then errstatus=$lasterr else if test ! -z "$dirmode"; then echo "chmod $dirmode $pathcomp" lasterr= chmod "$dirmode" "$pathcomp" || lasterr=$? if test ! -z "$lasterr"; then errstatus=$lasterr fi fi fi fi pathcomp=$pathcomp/ done done exit $errstatus # Local Variables: # mode: shell-script # sh-indentation: 2 # eval: (add-hook 'write-file-hooks 'time-stamp) # time-stamp-start: "scriptversion=" # time-stamp-format: "%:y-%02m-%02d.%02H" # time-stamp-time-zone: "UTC" # time-stamp-end: "; # UTC" # End: rc-1.7.4/status.c0000644000175000017500000000665112507445074010557 00000000000000/* status.c: functions for printing fancy status messages in rc */ #include "rc.h" #include "sigmsgs.h" #include "statval.h" #include "wait.h" /* status == the wait() value of the last command in the pipeline, or the last command */ static int statuses[512]; static int pipelength = 1; /* Test to see if rc's status is true. According to td, status is true if and only if every pipe-member has an exit status of zero. */ extern int istrue() { int i; for (i = 0; i < pipelength; i++) if (statuses[i] != 0) return FALSE; return TRUE; } /* Return the status as an integer. A status which has low-bits set is a signal number, whereas a status with high bits set is a value set from exit(). The presence of a signal just sets status to 1. Also, a pipeline with nonzero exit statuses in it just sets status to 1. */ extern int getstatus() { int s; if (pipelength > 1) return !istrue(); s = statuses[0]; if (WIFSIGNALED(s)) return 1; return WEXITSTATUS(s); } extern void set(bool code) { setstatus(-1, code ? STATUS0 : STATUS1); } /* take a pipeline and store the exit statuses. Check to see whether any of the children dumped core */ extern void setpipestatus(int stats[], int num) { int i; for (i = 0; i < (pipelength = num); i++) { statprint(-1, stats[i]); statuses[i] = stats[i]; } } /* set a simple status, as opposed to a pipeline */ extern void setstatus(pid_t pid, int i) { pipelength = 1; statuses[0] = i; statprint(pid, i); } /* print a message if termination was with a signal, and if the child dumped core. exit on error if -e is set */ extern void statprint(pid_t pid, int i) { if (WIFSIGNALED(i)) { int t = WTERMSIG(i); char *msg = ((t > 0) && (t < NUMOFSIGNALS) ? signals[WTERMSIG(i)].msg : ""); if (pid != -1) fprint(2, "%ld: ", (long)pid); if (myWIFDUMPED(i)) { if (*msg == '\0') fprint(2, "core dumped\n"); else fprint(2, "%s--core dumped\n", msg); } else if (*msg != '\0') fprint(2, "%s\n", msg); } if (i != 0 && dashee && !cond) rc_exit(getstatus()); } /* prepare a list to be passed back. Used whenever $status is dereferenced */ extern List *sgetstatus() { List *r = NULL; int i; for (i = 0; i < pipelength; i++) { List *q = nnew(List); q->w = strstatus(statuses[i]); q->m = NULL; q->n = r; r = q; } return r; } /* return status as a string (used above and for bqstatus) */ extern char *strstatus(int s) { if (WIFSIGNALED(s)) { int t = WTERMSIG(s); const char *core = myWIFDUMPED(s) ? "+core" : ""; if ((t > 0) && (t < NUMOFSIGNALS) && *signals[t].name != '\0') return nprint("%s%s", signals[t].name, core); else return nprint("-%d%s", t, core); /* unknown signals are negated */ } else return nprint("%d", WEXITSTATUS(s)); } extern void ssetstatus(char **av) { int i, j, k, l; bool found; for (l = 0; av[l] != NULL; l++) ; /* count up array length */ --l; for (i = 0; av[i] != NULL; i++) { j = a2u(av[i]); if (j >= 0) { statuses[l - i] = j << 8; continue; } found = FALSE; for (k = 0; k < NUMOFSIGNALS; k++) { if (streq(signals[k].name, av[i])) { statuses[l - i] = k; found = TRUE; break; } else { size_t len = strlen(signals[k].name); if (strncmp(signals[k].name, av[i], len) == 0 && streq(av[i] + len, "+core")) { statuses[l - i] = k + 0x80; found = TRUE; break; } } } if (!found) { fprint(2, "bad status\n"); set(FALSE); return; } } pipelength = i; } rc-1.7.4/hash.c0000644000175000017500000001612512507445074010154 00000000000000/* hash.c: hash table support for functions and variables. */ /* Functions and variables are cached in both internal and external form for performance. Thus a variable which is never "dereferenced" with a $ is passed on to rc's children untouched. This is not so important for variables, but is a big win for functions, where a call to yyparse() is involved. */ #include "rc.h" #include "sigmsgs.h" static bool var_exportable(char *); static bool fn_exportable(char *); static int hash(char *, int); static int find(char *, Htab *, int); static void free_fn(rc_Function *); Htab *fp; Htab *vp; static int fused, fsize, vused, vsize; static char **env; static int bozosize; static int envsize; static bool env_dirty = TRUE; static char *dead = ""; #define HASHSIZE 64 /* rc was debugged with HASHSIZE == 2; 64 is about right for normal use */ extern void inithash() { Htab *fpp, *vpp; int i; fp = ealloc(sizeof(Htab) * HASHSIZE); vp = ealloc(sizeof(Htab) * HASHSIZE); fused = vused = 0; fsize = vsize = HASHSIZE; for (vpp = vp, fpp = fp, i = 0; i < HASHSIZE; i++, vpp++, fpp++) vpp->name = fpp->name = NULL; } #define ADV() {if ((c = *s++) == '\0') break;} /* hash function courtesy of paul haahr */ static int hash(char *s, int size) { int c, n = 0; while (1) { ADV(); n += (c << 17) ^ (c << 11) ^ (c << 5) ^ (c >> 1); ADV(); n ^= (c << 14) + (c << 7) + (c << 4) + c; ADV(); n ^= (~c << 11) | ((c << 3) ^ (c >> 1)); ADV(); n -= (c << 16) | (c << 9) | (c << 2) | (c & 3); } if (n < 0) n = ~n; return n & (size - 1); /* need power of 2 size */ } static bool rehash(Htab *ht) { int i, j, size; int newsize, newused; Htab *newhtab; if (ht == fp) { if (fsize > 2 * fused) return FALSE; size = fsize; } else { if (vsize > 2 * vused) return FALSE; size = vsize; } newsize = 2 * size; newhtab = ealloc(newsize * sizeof(Htab)); for (i = 0; i < newsize; i++) newhtab[i].name = NULL; for (i = newused = 0; i < size; i++) if (ht[i].name != NULL && ht[i].name != dead) { newused++; j = hash(ht[i].name, newsize); while (newhtab[j].name != NULL) { j++; j &= (newsize - 1); } newhtab[j].name = ht[i].name; newhtab[j].p = ht[i].p; } if (ht == fp) { fused = newused; fp = newhtab; fsize = newsize; } else { vused = newused; vp = newhtab; vsize = newsize; } efree(ht); return TRUE; } #define varfind(s) find(s, vp, vsize) #define fnfind(s) find(s, fp, fsize) static int find(char *s, Htab *ht, int size) { int h = hash(s, size); while (ht[h].name != NULL && !streq(ht[h].name, s)) { h++; h &= size - 1; } return h; } extern void *lookup(char *s, Htab *ht) { int h = find(s, ht, ht == fp ? fsize : vsize); return (ht[h].name == NULL) ? NULL : ht[h].p; } extern rc_Function *get_fn_place(char *s) { int h = fnfind(s); env_dirty = TRUE; if (fp[h].name == NULL) { if (rehash(fp)) h = fnfind(s); fused++; fp[h].name = ecpy(s); fp[h].p = enew(rc_Function); } else free_fn(fp[h].p); return fp[h].p; } extern Variable *get_var_place(char *s, bool stack) { Variable *new; int h = varfind(s); env_dirty = TRUE; if (vp[h].name == NULL) { if (rehash(vp)) h = varfind(s); vused++; vp[h].name = ecpy(s); vp[h].p = enew(Variable); ((Variable *)vp[h].p)->n = NULL; return vp[h].p; } else { if (stack) { /* increase the stack by 1 */ new = enew(Variable); new->n = vp[h].p; return vp[h].p = new; } else { /* trample the top of the stack */ new = vp[h].p; efree(new->extdef); listfree(new->def); return new; } } } extern void delete_fn(char *s) { int h = fnfind(s); if (fp[h].name == NULL) return; /* not found */ env_dirty = TRUE; free_fn(fp[h].p); efree(fp[h].p); efree(fp[h].name); if (fp[(h+1)&(fsize-1)].name == NULL) { --fused; fp[h].name = NULL; } else { fp[h].name = dead; } } extern void delete_var(char *s, bool stack) { int h = varfind(s); Variable *v; if (vp[h].name == NULL) return; /* not found */ env_dirty = TRUE; v = vp[h].p; efree(v->extdef); listfree(v->def); if (v->n != NULL) { /* This is the top of a stack */ if (stack) { /* pop */ vp[h].p = v->n; efree(v); } else { /* else just empty */ v->extdef = NULL; v->def = NULL; } } else { /* needs to be removed from the hash table */ efree(v); efree(vp[h].name); if (vp[(h+1)&(vsize-1)].name == NULL) { --vused; vp[h].name = NULL; } else { vp[h].name = dead; } } } static void free_fn(rc_Function *f) { treefree(f->def); efree(f->extdef); } extern void initenv(char **envp) { int n; for (n = 0; envp[n] != NULL; n++) ; n++; /* one for the null terminator */ if (n < HASHSIZE) n = HASHSIZE; env = ealloc((envsize = 2 * n) * sizeof (char *)); for (; *envp != NULL; envp++) if (strncmp(*envp, "fn_", conststrlen("fn_")) == 0) { if (!dashpee) fnassign_string(*envp); } else { if (!varassign_string(*envp)) /* add to bozo env */ env[bozosize++] = *envp; } } static char *neverexport[] = { "apid", "apids", "bqstatus", "cdpath", "home", "ifs", "path", "pid", "status", "*" }; /* for a few variables that have default values, we export them only if they've been explicitly set; maybeexport[n].flag is TRUE if this has occurred. */ struct nameflag { char *name; bool flag; }; static struct nameflag maybeexport[] = { { "prompt", FALSE }, { "version", FALSE } }; void set_exportable(char *s, bool b) { int i; for (i = 0; i < arraysize(maybeexport); ++i) if (maybeexport[i].flag != b && streq(s, maybeexport[i].name)) maybeexport[i].flag = b; } static bool var_exportable(char *s) { int i; for (i = 0; i < arraysize(neverexport); i++) if (streq(s, neverexport[i])) return FALSE; for (i = 0; i < arraysize(maybeexport); i++) if (maybeexport[i].flag == FALSE && streq(s, maybeexport[i].name)) return FALSE; return TRUE; } static bool fn_exportable(char *s) { int i; if (strncmp(s, "sig", conststrlen("sig")) == 0) { /* small speed hack */ for (i = 0; i < NUMOFSIGNALS; i++) if (streq(s, signals[i].name)) return FALSE; if (streq(s, "sigexit")) return FALSE; } return TRUE; } extern char **makeenv() { int ep, i; char *v; if (!env_dirty) return env; env_dirty = FALSE; ep = bozosize; if (vsize + fsize + 1 + bozosize > envsize) { envsize = 2 * (bozosize + vsize + fsize + 1); env = erealloc(env, envsize * sizeof(char *)); } for (i = 0; i < vsize; i++) { if (vp[i].name == NULL || vp[i].name == dead || !var_exportable(vp[i].name)) continue; v = varlookup_string(vp[i].name); if (v != NULL) env[ep++] = v; } for (i = 0; i < fsize; i++) { if (fp[i].name == NULL || fp[i].name == dead || !fn_exportable(fp[i].name)) continue; env[ep++] = fnlookup_string(fp[i].name); } env[ep] = NULL; qsort(env, (size_t) ep, sizeof(char *), starstrcmp); return env; } extern void whatare_all_vars(bool showfn, bool showvar) { int i; List *s; if (showvar) for (i = 0; i < vsize; i++) if (vp[i].name != NULL && (s = varlookup(vp[i].name)) != NULL) prettyprint_var(1, vp[i].name, s); if (showfn) for (i = 0; i < fsize; i++) if (fp[i].name != NULL && fp[i].name != dead) prettyprint_fn(1, fp[i].name, fnlookup(fp[i].name)); } rc-1.7.4/parse.h0000644000175000017500000000116312507445074010344 00000000000000#ifndef YYERRCODE #define YYERRCODE 256 #endif #define ANDAND 257 #define BACKBACK 258 #define BANG 259 #define CASE 260 #define COUNT 261 #define DUP 262 #define ELSE 263 #define END 264 #define FLAT 265 #define FN 266 #define FOR 267 #define IF 268 #define IN 269 #define OROR 270 #define PIPE 271 #define REDIR 272 #define SREDIR 273 #define SUB 274 #define SUBSHELL 275 #define SWITCH 276 #define TWIDDLE 277 #define WHILE 278 #define WORD 279 #define HUH 280 typedef union { struct Node *node; struct Redir redir; struct Pipe pipe; struct Dup dup; struct Word word; char *keyword; } YYSTYPE; extern YYSTYPE yylval; rc-1.7.4/Makefile.am0000644000175000017500000000370012515531750011110 00000000000000## Process this file with automake to produce Makefile.in EDIT=@EDIT@ if AMC_HISTORY man_MANS = rc.1 history.1 HISTORY = history else man_MANS = rc.1 endif if AMC_NO_HASHBANG EXECVE = execve.o endif if AMC_RESTART SYSTEM = system-bsd.o else SYSTEM = system.o endif bin_PROGRAMS = rc noinst_PROGRAMS = mksignal mkstatval tripping $(HISTORY) rc_SOURCES = builtins.c except.c exec.c fn.c footobar.c getopt.c glob.c glom.c hash.c heredoc.c input.c lex.c list.c main.c match.c nalloc.c open.c parse.c print.c redir.c signal.c status.c tree.c utils.c var.c wait.c walk.c which.c EXTRA_rc_SOURCES = addon.c edit-edit.c edit-editline.c edit-null.c edit-readline.c edit-vrl.c execve.c system.c system-bsd.c rc_DEPENDENCIES = sigmsgs.o $(ADDON) $(EDIT) $(EXECVE) $(SYSTEM) rc_LDADD = sigmsgs.o $(ADDON) $(EDIT) $(EXECVE) $(SYSTEM) noinst_HEADERS = edit.h getgroups.h input.h jbwrap.h parse.h proto.h rc.h rlimit.h stat.h wait.h BUILT_SOURCES = sigmsgs.c EXTRA_DIST = EXAMPLES addon.c addon.h history.1 parse.y rc.1 trip.rc sigmsgs.c sigmsgs.h: mksignal ./mksignal # Newer automake's buildtime dependency tracking can't seem to figure # this one out. status.o: statval.h statval.h: mkstatval ./mkstatval > statval.h DISTCLEANFILES = sigmsgs.c sigmsgs.h statval.h # Of course, parse.c and parse.h depend on parse.y. However, unless # you're hacking on rc's grammar, it's not useful to have this # dependency expressed, since the distributed parse.[ch] (generated with # byacc, and lightly edited to remove a couple of gcc warnings) are # portable (I hope). #parse.c parse.h: $(srcdir)/parse.y # $(YACC) -d $(srcdir)/parse.y # mv y.tab.c parse.c # mv y.tab.h parse.h check: trip trip: rc tripping ./rc -p < $(srcdir)/trip.rc install-exec-hook: if AMC_HISTORY $(INSTALL_PROGRAM) history $(bindir)/- ;\ rm -f $(bindir)/--; $(LN) $(bindir)/- $(bindir)/-- ;\ rm -f $(bindir)/-p; $(LN) $(bindir)/- $(bindir)/-p ;\ rm -f $(bindir)/--p; $(LN) $(bindir)/- $(bindir)/--p endif rc-1.7.4/acinclude.m40000644000175000017500000001316412515531750011252 00000000000000dnl This macro sets HAVE_POSIX_GETGROUPS if the dnl getgroups() function accepts a zero first argument. AC_DEFUN([RC_FUNC_GETGROUPS], [ AC_CACHE_CHECK(for POSIX getgroups, rc_cv_func_posix_getgroups, AC_TRY_RUN([ #include #include int main(void) { return getgroups(0, (void *)0) == -1; } ], rc_cv_func_posix_getgroups=yes, rc_cv_func_posix_getgroups=no, rc_cv_func_posix_getgroups=yes)) case "$rc_cv_func_posix_getgroups" in yes) AC_DEFINE(HAVE_POSIX_GETGROUPS, 1, [Define to 1 if you have the `getgroups' function with POSIX semantics.]) ;; esac ]) dnl We can't use AC_CHECK_FUNCS for sigsetjmp(), since it's a macro in dnl some places. AC_DEFUN([RC_FUNC_SIGSETJMP], [ AC_CACHE_CHECK(for sigsetjmp, rc_cv_sigsetjmp, AC_TRY_LINK([ #include ], [ sigjmp_buf e; sigsetjmp(e, 1); ], rc_cv_sigsetjmp=yes, rc_cv_sigsetjmp=no)) case "$rc_cv_sigsetjmp" in yes) AC_DEFINE(HAVE_SIGSETJMP, 1, [Define to 1 if you have the `sigsetjmp' function or macro.]) ;; esac ]) dnl Similarly, AC_CHECK_FUNCS doesn't find strerror() on NetBSD. AC_DEFUN([RC_FUNC_STRERROR], [ AC_CACHE_CHECK(for strerror, rc_cv_strerror, AC_TRY_LINK([ #include ], [ strerror(0); ], rc_cv_strerror=yes, rc_cv_strerror=no)) case "$rc_cv_strerror" in yes) AC_DEFINE(HAVE_STRERROR, 1, [Define to 1 if you have the `strerror' function or macro.]) ;; esac ]) dnl HPUX needs _KERNEL defined to pick up RLIMIT_foo defines. (Why?) AC_DEFUN([RC_NEED_KERNEL], [ AC_CACHE_CHECK(if _KERNEL is required for RLIMIT defines, rc_cv_kernel_rlimit, AC_TRY_COMPILE([ #include #include ], [ int f; f = RLIMIT_DATA; ], rc_cv_kernel_rlimit=no, [ AC_TRY_COMPILE([ #include #define _KERNEL #include #undef _KERNEL ], [ int f; f = RLIMIT_DATA; ], rc_cv_kernel_rlimit=yes, rc_cv_kernel_rlimit=no)])) case "$rc_cv_kernel_rlimit" in yes) AC_DEFINE(RLIMIT_NEEDS_KERNEL, 1, [Define to 1 if `_KERNEL' must be defined for `RLIMIT_*' macros.]) ;; esac ]) dnl Look for rlim_t in sys/types.h and sys/resource.h AC_DEFUN([RC_TYPE_RLIM_T], [ AC_CACHE_CHECK(for rlim_t, rc_cv_have_rlim_t, AC_EGREP_CPP(rlim_t, [ #include #if RLIMIT_NEEDS_KERNEL #define _KERNEL #endif #include ], rc_cv_have_rlim_t=yes, rc_cv_have_rlim_t=no)) case "$rc_cv_have_rlim_t" in yes) AC_DEFINE(HAVE_RLIM_T, 1, [Define to 1 if you have the `rlim_t' type.]) ;; no) AC_CACHE_CHECK(for native quad_t, rc_cv_have_quad_t, AC_TRY_COMPILE([ #include ], [ typedef quad_t align_t; align_t a; a = (quad_t)0; ], rc_cv_have_quad_t=yes, rc_cv_have_quad_t=no)) case "$rc_cv_have_quad_t" in yes) AC_DEFINE(HAVE_QUAD_T, 1, [Define to 1 if you have the `quad_t' type.]) AC_CACHE_CHECK(if rlimit values are quad_t, rc_cv_rlim_t_is_quad_t, AC_TRY_RUN([ #include #include #include #if RLIMIT_NEEDS_KERNEL #define _KERNEL #endif #include #if RLIMIT_NEEDS_KERNEL #undef _KERNEL #endif main(){ struct rlimit rl; exit(sizeof rl.rlim_cur != sizeof(quad_t)); } ], rc_cv_rlim_t_is_quad_t=yes, rc_cv_rlim_t_is_quad_t=no, $ac_cv_type_quad_t)) case "$rc_cv_rlim_t_is_quad_t" in yes) AC_DEFINE(RLIM_T_IS_QUAD_T, 1, [Define to 1 if `rlim_t' is `quad_t'.]) ;; esac ;; esac ;; esac ]) dnl Check type of sig_atomic_t. AC_DEFUN([RC_TYPE_SIG_ATOMIC_T], [ AC_CACHE_CHECK(for sig_atomic_t, rc_cv_sig_atomic_t, AC_EGREP_HEADER(sig_atomic_t, signal.h, rc_cv_sig_atomic_t=yes, rc_cv_sig_atomic_t=no)) case "$rc_cv_sig_atomic_t" in no) AC_DEFINE(sig_atomic_t, int, [Define to 1 if you have the `sig_atomic_t' type.]) ;; esac ]) dnl Do we have SysV SIGCLD semantics? In other words, if we set the dnl action for SIGCLD to SIG_IGN does wait() always say ECHILD? Linux, dnl of course, is bizarre here. It basically implements the SysV dnl semantics, but if the parent calls wait() before the child calls dnl exit(), wait() returns with the PID of the child as normal. (Real dnl SysV waits for all children to exit, then returns with ECHILD.) dnl Anyway, this is why the `sleep(1)' is there. AC_DEFUN([RC_SYS_V_SIGCLD], [ AC_CACHE_CHECK(for SysV SIGCLD semantics, rc_cv_sysv_sigcld, AC_TRY_RUN([ #include #include #include #include #include int main(void) { int i; signal(SIGCLD, SIG_IGN); switch (fork()) { case -1: return 1; case 0: return 0; default: sleep(1); if (wait(&i) == -1 && errno == ECHILD) return 0; else return 1; } } ], rc_cv_sysv_sigcld=yes, rc_cv_sysv_sigcld=no, rc_cv_sysv_sigcld=yes)) case "$rc_cv_sysv_sigcld" in yes) AC_DEFINE(HAVE_SYSV_SIGCLD, 1, [Has SysV SIGCLD]) ;; esac ]) dnl Do we have /dev/fd or /proc/self/fd? AC_DEFUN([RC_SYS_DEV_FD], [ AC_CACHE_CHECK(for /dev/fd, rc_cv_sys_dev_fd, if test -d /dev/fd && test -r /dev/fd/0; then rc_cv_sys_dev_fd=yes elif test -d /proc/self/fd && test -r /proc/self/fd/0; then rc_cv_sys_dev_fd=odd else rc_cv_sys_dev_fd=no fi ) ]) dnl Can mknod make FIFOs? AC_DEFUN([RC_SYS_MKNOD_FIFO], [ AC_CACHE_CHECK(for mknod FIFOs, rc_cv_sys_fifo, AC_TRY_RUN([ #include #include main() { exit(mknod("/tmp/rc$$.0", S_IFIFO | 0666, 0) != 0); } ], rc_cv_sys_fifo=yes, rc_cv_sys_fifo=no, rc_cv_sys_fifo=no)) rm -f /tmp/rc$$.0 case "$rc_cv_sys_fifo" in yes) AC_DEFINE(HAVE_FIFO) ;; esac ]) dnl Where is tgetent()? AC_DEFUN([RC_LIB_TGETENT], [ AC_CHECK_LIB(tinfo, tgetent, rc_lib_tgetent=-ltinfo, AC_CHECK_LIB(termcap, tgetent, rc_lib_tgetent=-ltermcap, AC_CHECK_LIB(ncurses, tgetent, rc_lib_tgetent=-lncurses, AC_MSG_ERROR(tgetent not found) ) ) ) ]) rc-1.7.4/proto.h0000644000175000017500000000447612515531750010403 00000000000000/* The idea of this file is to include prototypes for all external functions that rc uses, either by including the appropriate header file, or---for older systems---declaring the functions directly. */ #if HAVE_SYS_TYPES_H #include #endif #include #if HAVE_QUAD_T typedef quad_t align_t; #else typedef long align_t; #endif /* We need . If you really need to build rc on a system which doesn't have it, please contact the maintainer. */ #include /* C 99 specifies a va_copy() macro to be used for copying objects of type va_list. If this doesn't exist, hope that simple assignment works. */ #ifndef va_copy #define va_copy(x,y) (x)=(y) #endif #if STDC_HEADERS #include #include #else /* STDC_HEADERS */ /* fake string.h */ extern int strncmp(const char *, const char *, size_t); extern int strcmp(const char *, const char *); extern size_t strlen(const char *); extern char *strchr(const char *, int); extern char *strrchr(const char *, int); extern char *strcpy(char *, const char *); extern char *strncpy(char *, const char *, size_t); extern char *strcat(char *, const char *); extern char *strncat(char *, const char *, size_t); extern void *memcpy(void *, const void *, size_t); extern void *memset(void *, int, size_t); /* fake stdlib.h */ extern void exit(int); extern void free(void *); extern void *malloc(size_t); extern void *realloc(void *, size_t); extern void qsort(void *, size_t, size_t, int (*)(const void *, const void *)); #endif /* STDC_HEADERS */ #if HAVE_STRERROR /* Smells like POSIX. */ #else /* Assume BSD-style sys_errlist[]. */ extern int sys_nerr; extern char *sys_errlist[]; #define strerror(x) ((0 <= (x)) && (errno < (x)) ? sys_errlist[x] : (char *)0) #endif #if HAVE_UNISTD_H #include #endif #if HAVE_SETPGRP #if SETPGRP_VOID /* Smells like POSIX: should all be ok. */ #else /* Old BSD: fake it. */ #define setpgid(pid, pgrp) setpgrp(pid, pgrp) #include #define tcgetpgrp(fd) ioctl((fd), TIOCGPGRP) #define tcsetpgrp(fd, pgrp) ioctl((fd), TIOCSPGRP, &(pgrp)) #endif #else /* HAVE_SETPGRP */ /* Nothing doing. */ #define setpgid() #define tcgetpgrp() #define tcsetpgrp() #endif /*HAVE_SETPGRP */ /* fake errno.h for mips (which doesn't declare errno in errno.h!?!?) */ #ifdef host_mips extern int errno; #endif rc-1.7.4/parse.c0000644000175000017500000011701612507445074010344 00000000000000#ifndef lint static char const yyrcsid[] = "$FreeBSD: src/usr.bin/yacc/skeleton.c,v 1.28 2000/01/17 02:04:06 bde Exp $"; #endif #include "rc.h" #include #define YYBYACC 1 #define YYMAJOR 1 #define YYMINOR 9 #define YYLEX yylex() #define YYEMPTY -1 #define yyclearin (yychar=(YYEMPTY)) #define yyerrok (yyerrflag=0) #define YYRECOVERING() (yyerrflag!=0) static int yygrowstack(); #define YYPREFIX "yy" #line 8 "parse.y" static Node *star, *nolist; Node *parsetree; /* not using yylval because bison declares it as an auto */ #line 26 "parse.y" typedef union { struct Node *node; struct Redir redir; struct Pipe pipe; struct Dup dup; struct Word word; char *keyword; } YYSTYPE; #line 31 "y.tab.c" #define YYERRCODE 256 #define ANDAND 257 #define BACKBACK 258 #define BANG 259 #define CASE 260 #define COUNT 261 #define DUP 262 #define ELSE 263 #define END 264 #define FLAT 265 #define FN 266 #define FOR 267 #define IF 268 #define IN 269 #define OROR 270 #define PIPE 271 #define REDIR 272 #define SREDIR 273 #define SUB 274 #define SUBSHELL 275 #define SWITCH 276 #define TWIDDLE 277 #define WHILE 278 #define WORD 279 #define HUH 280 const short yylhs[] = { -1, 0, 0, 22, 22, 8, 8, 13, 13, 3, 3, 9, 9, 4, 15, 2, 11, 11, 16, 16, 16, 5, 5, 6, 6, 6, 19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 24, 24, 18, 18, 18, 12, 12, 17, 17, 20, 20, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 21, 21, 14, 14, 14, 23, 23, }; const short yylen[] = { 2, 2, 2, 1, 1, 2, 2, 1, 2, 1, 2, 1, 2, 3, 3, 3, 0, 2, 1, 2, 2, 3, 3, 1, 2, 2, 1, 4, 0, 1, 2, 4, 8, 6, 4, 8, 4, 4, 4, 4, 2, 2, 3, 3, 3, 2, 0, 1, 1, 2, 2, 1, 3, 1, 1, 1, 3, 2, 5, 2, 2, 2, 2, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 2, 0, 2, 2, 0, 2, }; const short yydefred[] = { 0, 0, 0, 0, 0, 18, 0, 79, 0, 0, 0, 0, 0, 0, 0, 0, 67, 0, 0, 81, 0, 0, 0, 0, 0, 0, 51, 0, 0, 0, 0, 3, 4, 2, 77, 75, 74, 73, 68, 71, 69, 0, 78, 72, 76, 70, 54, 53, 55, 0, 47, 0, 59, 60, 0, 0, 0, 84, 66, 0, 0, 0, 0, 0, 84, 0, 0, 0, 11, 0, 0, 62, 61, 0, 0, 30, 0, 84, 84, 84, 5, 6, 8, 0, 0, 1, 0, 50, 0, 0, 63, 64, 0, 44, 0, 0, 0, 0, 0, 0, 0, 0, 79, 13, 12, 10, 65, 82, 0, 17, 0, 0, 0, 0, 52, 56, 79, 84, 14, 85, 0, 0, 31, 84, 0, 0, 0, 0, 0, 39, 0, 0, 84, 0, 58, 84, 0, 0, 0, 0, 0, 79, 0, 0, 0, 0, 0, 0, 24, 35, 25, 22, 21, }; const short yydgoto[] = { 21, 46, 22, 66, 23, 142, 143, 67, 68, 69, 47, 75, 27, 28, 70, 57, 29, 48, 30, 122, 94, 54, 33, 97, 51, }; const short yysindex[] = { 874, 24, 1001, -82, 1001, 0, 1001, 0, -27, -26, 900, 1001, -82, -20, -82, -26, 0, 1001, 1134, 0, 900, 0, 1134, -203, -30, 1134, 0, -55, 24, 1134, 826, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -66, 0, 0, 0, 0, 0, 0, 0, 849, 0, 1134, 0, 0, 900, 1001, 1134, 0, 0, -52, -52, 1134, 1001, 1001, 0, -212, -58, 154, 0, 1134, 426, 0, 0, -196, 1001, 0, -203, 0, 0, 0, 0, 0, 0, 1001, 1001, 0, -196, 0, -52, 1001, 0, 0, -196, 0, -52, -38, 36, 502, -196, -36, -52, 502, 0, 0, 0, 0, 0, 0, -52, 0, 502, 502, 502, -52, 0, 0, 0, 0, 0, 0, -97, -234, 0, 0, 1001, -234, 922, -196, -196, 0, 944, 502, 0, -9, 0, 0, -234, 502, 967, 502, -234, 0, 967, -45, 154, 967, -234, 448, 0, 0, 0, 0, 0, }; const short yyrindex[] = { 134, 0, 0, 356, 0, 0, 0, 0, 0, 0, 0, 0, 356, 0, 1024, 0, 0, 0, 571, 0, 0, 0, 487, 529, 54, 134, 0, 62, 0, 487, 548, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 487, 0, 0, 712, 0, 142, 0, 0, 14, 38, 487, 0, 0, 0, -10, 0, -32, 0, 744, 0, 0, 0, 749, 0, 0, 529, 0, 0, 0, 0, 0, 0, 0, 0, 0, 763, 0, 86, 0, 0, 0, 779, 0, 110, 0, 0, -34, 788, 0, 380, -34, 0, 0, 0, 0, 0, 0, 470, 0, -34, -34, -34, 404, 0, 0, 0, 0, 0, 0, 529, 6, 0, 0, 724, 30, 0, 805, 813, 0, 0, -34, 0, 0, 0, 0, 119, -34, 571, -34, 187, 0, 571, 0, -44, 571, 396, 0, 0, 0, 0, 0, 0, }; const short yygindex[] = { 0, 0, 0, -23, 12, 0, -104, 1319, 2, -127, 1307, 7, 0, 57, 0, 70, -13, 84, 0, 0, 420, -81, 59, 369, 31, }; #define YYTABLESIZE 1464 const short yytable[] = { 57, 119, 25, 117, 28, 123, 83, 28, 81, 9, 76, 145, 50, 55, 56, 145, 26, 87, 145, 124, 62, 126, 58, 77, 19, 28, 57, 25, 57, 80, 57, 57, 71, 96, 32, 130, 78, 79, 148, 84, 34, 150, 89, 61, 26, 63, 105, 26, 20, 57, 19, 57, 19, 58, 19, 19, 89, 18, 89, 5, 147, 90, 102, 76, 7, 26, 93, 103, 34, 74, 11, 34, 48, 19, 20, 79, 20, 118, 20, 20, 149, 23, 82, 109, 57, 64, 57, 85, 52, 34, 53, 28, 0, 9, 0, 0, 49, 20, 48, 0, 48, 65, 48, 48, 72, 0, 0, 76, 0, 120, 19, 0, 0, 57, 138, 57, 0, 0, 0, 0, 80, 48, 49, 0, 49, 0, 49, 49, 0, 33, 0, 26, 0, 91, 20, 0, 0, 19, 0, 19, 0, 0, 0, 0, 28, 49, 80, 0, 80, 0, 80, 80, 28, 0, 0, 34, 0, 33, 48, 0, 33, 20, 0, 20, 104, 5, 132, 0, 114, 80, 0, 0, 28, 115, 0, 74, 11, 0, 33, 0, 28, 0, 49, 28, 0, 0, 0, 48, 0, 0, 0, 0, 81, 28, 0, 0, 0, 27, 0, 0, 0, 28, 0, 0, 0, 0, 80, 0, 0, 0, 0, 49, 0, 80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 28, 0, 27, 0, 77, 27, 0, 28, 116, 0, 80, 0, 80, 28, 28, 0, 0, 78, 79, 0, 0, 33, 0, 27, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 57, 0, 57, 57, 57, 57, 57, 26, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 31, 19, 19, 19, 19, 19, 34, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 27, 20, 20, 20, 20, 20, 7, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 0, 48, 48, 48, 48, 48, 0, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 0, 49, 49, 49, 49, 49, 46, 80, 80, 80, 80, 80, 0, 80, 80, 80, 80, 80, 80, 80, 80, 80, 80, 33, 0, 80, 80, 80, 80, 80, 79, 28, 46, 0, 46, 0, 46, 46, 28, 28, 0, 0, 0, 0, 28, 28, 32, 0, 0, 0, 0, 77, 28, 28, 15, 46, 79, 0, 79, 0, 79, 79, 49, 0, 78, 79, 0, 0, 0, 0, 59, 60, 0, 101, 32, 0, 107, 32, 0, 79, 15, 0, 15, 0, 15, 15, 110, 111, 112, 0, 88, 27, 46, 0, 0, 32, 0, 0, 151, 0, 0, 0, 17, 15, 0, 0, 19, 106, 0, 0, 0, 0, 0, 0, 0, 95, 79, 0, 0, 46, 83, 46, 99, 100, 17, 0, 131, 0, 19, 0, 108, 0, 133, 0, 59, 0, 0, 28, 0, 0, 15, 137, 0, 113, 139, 79, 83, 152, 0, 0, 83, 83, 119, 0, 0, 0, 0, 0, 0, 0, 0, 32, 20, 0, 0, 28, 0, 15, 28, 15, 0, 0, 0, 0, 0, 0, 0, 0, 17, 16, 0, 0, 19, 0, 20, 0, 28, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 29, 0, 0, 0, 0, 0, 0, 0, 83, 16, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 28, 0, 0, 0, 0, 29, 0, 16, 29, 0, 0, 0, 0, 0, 0, 0, 0, 20, 0, 0, 0, 0, 0, 0, 0, 0, 29, 0, 28, 0, 0, 28, 46, 46, 46, 0, 46, 46, 0, 46, 46, 46, 46, 46, 18, 46, 46, 46, 46, 28, 46, 46, 46, 46, 46, 0, 79, 79, 79, 79, 79, 0, 79, 79, 79, 79, 79, 79, 79, 79, 79, 79, 0, 16, 79, 79, 79, 79, 79, 32, 15, 15, 15, 0, 15, 15, 0, 15, 15, 15, 15, 15, 29, 15, 15, 15, 15, 0, 15, 15, 15, 15, 15, 2, 34, 35, 4, 0, 36, 0, 6, 37, 38, 39, 40, 28, 0, 41, 0, 0, 42, 43, 44, 45, 16, 2, 34, 35, 4, 0, 36, 0, 6, 37, 38, 39, 40, 0, 0, 41, 0, 45, 42, 43, 44, 45, 16, 83, 83, 83, 83, 0, 83, 36, 83, 83, 83, 83, 83, 0, 0, 83, 0, 28, 83, 83, 83, 83, 83, 45, 28, 0, 45, 28, 0, 0, 28, 28, 41, 2, 3, 36, 4, 5, 36, 0, 6, 7, 8, 9, 45, 0, 40, 10, 11, 0, 12, 13, 14, 15, 16, 28, 36, 0, 28, 16, 41, 0, 42, 41, 0, 0, 16, 0, 0, 0, 0, 43, 16, 16, 40, 0, 28, 40, 29, 0, 0, 41, 0, 0, 0, 29, 0, 0, 37, 0, 42, 29, 29, 42, 0, 40, 38, 0, 0, 43, 0, 28, 43, 0, 0, 0, 0, 0, 0, 0, 45, 42, 0, 0, 28, 28, 37, 0, 0, 37, 43, 0, 36, 0, 38, 0, 0, 38, 0, 0, 0, 0, 0, 0, 0, 17, 0, 37, 0, 19, 0, 0, 28, 0, 0, 38, 0, 41, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 17, 0, 0, 40, 19, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 42, 0, 0, 0, 0, 0, 17, 0, 0, 43, 19, 0, 0, 0, 0, 0, 0, 0, 20, 0, 0, 0, 0, 0, 0, 0, 37, 0, 0, 0, 0, 0, 17, 0, 38, 0, 19, 0, 0, 89, 0, 20, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 17, 0, 0, 0, 19, 134, 0, 0, 0, 0, 0, 45, 20, 0, 18, 0, 0, 0, 45, 0, 0, 0, 17, 36, 45, 45, 19, 135, 0, 0, 36, 0, 0, 0, 0, 0, 36, 36, 20, 18, 0, 0, 0, 28, 0, 17, 0, 0, 41, 19, 0, 0, 0, 0, 0, 41, 28, 28, 0, 0, 20, 41, 40, 0, 0, 18, 0, 0, 0, 40, 0, 0, 0, 0, 0, 40, 0, 0, 42, 17, 0, 0, 20, 19, 0, 42, 0, 43, 0, 0, 0, 42, 0, 0, 43, 0, 0, 0, 0, 0, 43, 0, 46, 0, 37, 20, 46, 0, 0, 0, 0, 37, 38, 0, 0, 0, 0, 37, 0, 38, 0, 0, 0, 0, 0, 38, 2, 34, 35, 4, 5, 36, 18, 6, 37, 38, 39, 40, 0, 20, 10, 11, 0, 42, 43, 44, 45, 16, 0, 2, 34, 35, 4, 0, 36, 0, 6, 37, 38, 39, 40, 0, 46, 41, 0, 0, 42, 43, 44, 45, 16, 0, 1, 0, 2, 3, 0, 4, 5, 0, 0, 6, 7, 8, 9, 0, 0, 0, 10, 11, 0, 12, 13, 14, 15, 16, 0, 0, 0, 0, 2, 34, 35, 4, 0, 36, 0, 6, 37, 38, 39, 40, 17, 0, 41, 0, 19, 42, 43, 44, 45, 16, 2, 34, 35, 4, 0, 36, 0, 6, 37, 38, 39, 40, 0, 0, 41, 0, 0, 42, 43, 44, 45, 16, 2, 34, 35, 4, 0, 36, 0, 6, 37, 38, 39, 40, 0, 0, 41, 0, 0, 42, 43, 44, 45, 16, 0, 2, 3, 141, 4, 5, 20, 0, 6, 7, 8, 9, 0, 0, 0, 10, 11, 0, 12, 13, 14, 15, 16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 18, 0, 2, 34, 35, 4, 0, 36, 0, 6, 37, 38, 39, 40, 0, 0, 41, 0, 0, 42, 43, 44, 45, 16, 0, 46, 46, 46, 46, 0, 46, 0, 46, 46, 46, 46, 46, 0, 0, 46, 0, 0, 46, 46, 46, 46, 46, 0, 0, 0, 26, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 24, 0, 0, 0, 0, 0, 26, 0, 0, 0, 26, 0, 0, 26, 0, 0, 0, 26, 0, 0, 0, 0, 73, 0, 0, 24, 0, 0, 0, 86, 0, 0, 0, 0, 0, 0, 0, 0, 0, 26, 0, 0, 0, 0, 26, 0, 0, 0, 0, 26, 0, 92, 0, 0, 0, 0, 0, 26, 0, 0, 0, 98, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 3, 0, 4, 5, 0, 0, 6, 7, 8, 9, 0, 26, 0, 10, 11, 26, 12, 13, 14, 15, 16, 0, 0, 121, 26, 26, 26, 125, 0, 0, 0, 0, 0, 0, 0, 0, 127, 128, 129, 0, 0, 0, 0, 0, 0, 26, 0, 0, 0, 0, 0, 26, 26, 26, 0, 0, 26, 136, 0, 26, 0, 0, 0, 140, 144, 146, 0, 0, 144, 0, 0, 144, }; const short yycheck[] = { 10, 10, 0, 41, 38, 41, 61, 41, 38, 41, 23, 138, 94, 40, 40, 142, 10, 30, 145, 100, 40, 102, 10, 257, 10, 59, 36, 25, 38, 59, 40, 41, 20, 56, 10, 116, 270, 271, 142, 94, 10, 145, 94, 12, 38, 14, 69, 41, 10, 59, 36, 61, 38, 41, 40, 41, 94, 123, 94, 262, 141, 49, 274, 76, 10, 59, 54, 125, 38, 272, 273, 41, 10, 59, 36, 271, 38, 41, 40, 41, 125, 125, 25, 76, 94, 15, 96, 28, 4, 59, 6, 125, -1, 125, -1, -1, 10, 59, 36, -1, 38, 17, 40, 41, 20, -1, -1, 120, -1, 97, 96, -1, -1, 123, 123, 125, -1, -1, -1, -1, 10, 59, 36, -1, 38, -1, 40, 41, -1, 10, -1, 125, -1, 49, 96, -1, -1, 123, -1, 125, -1, -1, -1, -1, 10, 59, 36, -1, 38, -1, 40, 41, 10, -1, -1, 125, -1, 38, 96, -1, 41, 123, -1, 125, 10, 262, 263, -1, 84, 59, -1, -1, 38, 89, -1, 272, 273, -1, 59, -1, 38, -1, 96, 41, -1, -1, -1, 125, -1, -1, -1, -1, 38, 59, -1, -1, -1, 10, -1, -1, -1, 59, -1, -1, -1, -1, 96, -1, -1, -1, -1, 125, -1, 59, -1, -1, -1, -1, -1, -1, -1, -1, -1, 257, -1, 38, -1, 257, 41, -1, 264, 269, -1, 123, -1, 125, 270, 271, -1, -1, 270, 271, -1, -1, 125, -1, 59, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, -1, 275, 276, 277, 278, 279, 264, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 264, 275, 276, 277, 278, 279, 264, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 125, 275, 276, 277, 278, 279, 264, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, -1, 275, 276, 277, 278, 279, -1, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, -1, 275, 276, 277, 278, 279, 10, 257, 258, 259, 260, 261, -1, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 264, -1, 275, 276, 277, 278, 279, 10, 257, 36, -1, 38, -1, 40, 41, 264, 257, -1, -1, -1, -1, 270, 271, 10, -1, -1, -1, -1, 257, 270, 271, 10, 59, 36, -1, 38, -1, 40, 41, 2, -1, 270, 271, -1, -1, -1, -1, 10, 11, -1, 64, 38, -1, 10, 41, -1, 59, 36, -1, 38, -1, 40, 41, 77, 78, 79, -1, 30, 264, 96, -1, -1, 59, -1, -1, 10, -1, -1, -1, 36, 59, -1, -1, 40, 41, -1, -1, -1, -1, -1, -1, -1, 55, 96, -1, -1, 123, 10, 125, 62, 63, 36, -1, 117, -1, 40, -1, 70, -1, 123, -1, 74, -1, -1, 10, -1, -1, 96, 132, -1, 83, 135, 125, 36, 59, -1, -1, 40, 41, 10, -1, -1, -1, -1, -1, -1, -1, -1, 125, 96, -1, -1, 38, -1, 123, 41, 125, -1, -1, -1, -1, -1, -1, -1, -1, 36, 10, -1, -1, 40, -1, 96, -1, 59, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 10, -1, -1, -1, -1, -1, -1, -1, 96, 38, -1, -1, 41, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 10, -1, -1, -1, -1, 38, -1, 59, 41, -1, -1, -1, -1, -1, -1, -1, -1, 96, -1, -1, -1, -1, -1, -1, -1, -1, 59, -1, 38, -1, -1, 125, 257, 258, 259, -1, 261, 262, -1, 264, 265, 266, 267, 268, 123, 270, 271, 272, 273, 59, 275, 276, 277, 278, 279, -1, 257, 258, 259, 260, 261, -1, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, -1, 125, 275, 276, 277, 278, 279, 264, 257, 258, 259, -1, 261, 262, -1, 264, 265, 266, 267, 268, 125, 270, 271, 272, 273, -1, 275, 276, 277, 278, 279, 258, 259, 260, 261, -1, 263, -1, 265, 266, 267, 268, 269, 125, -1, 272, -1, -1, 275, 276, 277, 278, 279, 258, 259, 260, 261, -1, 263, -1, 265, 266, 267, 268, 269, -1, -1, 272, -1, 10, 275, 276, 277, 278, 279, 258, 259, 260, 261, -1, 263, 10, 265, 266, 267, 268, 269, -1, -1, 272, -1, 257, 275, 276, 277, 278, 279, 38, 264, -1, 41, 10, -1, -1, 270, 271, 10, 258, 259, 38, 261, 262, 41, -1, 265, 266, 267, 268, 59, -1, 10, 272, 273, -1, 275, 276, 277, 278, 279, 38, 59, -1, 41, 257, 38, -1, 10, 41, -1, -1, 264, -1, -1, -1, -1, 10, 270, 271, 38, -1, 59, 41, 257, -1, -1, 59, -1, -1, -1, 264, -1, -1, 10, -1, 38, 270, 271, 41, -1, 59, 10, -1, -1, 38, -1, 257, 41, -1, -1, -1, -1, -1, -1, -1, 125, 59, -1, -1, 270, 271, 38, -1, -1, 41, 59, -1, 125, -1, 38, -1, -1, 41, -1, -1, -1, -1, -1, -1, -1, 36, -1, 59, -1, 40, -1, -1, 125, -1, -1, 59, -1, 125, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 36, -1, -1, 125, 40, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 125, -1, -1, -1, -1, -1, 36, -1, -1, 125, 40, -1, -1, -1, -1, -1, -1, -1, 96, -1, -1, -1, -1, -1, -1, -1, 125, -1, -1, -1, -1, -1, 36, -1, 125, -1, 40, -1, -1, 94, -1, 96, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 36, -1, -1, -1, 40, 41, -1, -1, -1, -1, -1, 257, 96, -1, 123, -1, -1, -1, 264, -1, -1, -1, 36, 257, 270, 271, 40, 41, -1, -1, 264, -1, -1, -1, -1, -1, 270, 271, 96, 123, -1, -1, -1, 257, -1, 36, -1, -1, 257, 40, -1, -1, -1, -1, -1, 264, 270, 271, -1, -1, 96, 270, 257, -1, -1, 123, -1, -1, -1, 264, -1, -1, -1, -1, -1, 270, -1, -1, 257, 36, -1, -1, 96, 40, -1, 264, -1, 257, -1, -1, -1, 270, -1, -1, 264, -1, -1, -1, -1, -1, 270, -1, 36, -1, 257, 96, 40, -1, -1, -1, -1, 264, 257, -1, -1, -1, -1, 270, -1, 264, -1, -1, -1, -1, -1, 270, 258, 259, 260, 261, 262, 263, 123, 265, 266, 267, 268, 269, -1, 96, 272, 273, -1, 275, 276, 277, 278, 279, -1, 258, 259, 260, 261, -1, 263, -1, 265, 266, 267, 268, 269, -1, 96, 272, -1, -1, 275, 276, 277, 278, 279, -1, 256, -1, 258, 259, -1, 261, 262, -1, -1, 265, 266, 267, 268, -1, -1, -1, 272, 273, -1, 275, 276, 277, 278, 279, -1, -1, -1, -1, 258, 259, 260, 261, -1, 263, -1, 265, 266, 267, 268, 269, 36, -1, 272, -1, 40, 275, 276, 277, 278, 279, 258, 259, 260, 261, -1, 263, -1, 265, 266, 267, 268, 269, -1, -1, 272, -1, -1, 275, 276, 277, 278, 279, 258, 259, 260, 261, -1, 263, -1, 265, 266, 267, 268, 269, -1, -1, 272, -1, -1, 275, 276, 277, 278, 279, -1, 258, 259, 260, 261, 262, 96, -1, 265, 266, 267, 268, -1, -1, -1, 272, 273, -1, 275, 276, 277, 278, 279, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 123, -1, 258, 259, 260, 261, -1, 263, -1, 265, 266, 267, 268, 269, -1, -1, 272, -1, -1, 275, 276, 277, 278, 279, -1, 258, 259, 260, 261, -1, 263, -1, 265, 266, 267, 268, 269, -1, -1, 272, -1, -1, 275, 276, 277, 278, 279, -1, -1, -1, 0, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, -1, -1, -1, -1, -1, 18, -1, -1, -1, 22, -1, -1, 25, -1, -1, -1, 29, -1, -1, -1, -1, 22, -1, -1, 25, -1, -1, -1, 29, -1, -1, -1, -1, -1, -1, -1, -1, -1, 51, -1, -1, -1, -1, 56, -1, -1, -1, -1, 61, -1, 51, -1, -1, -1, -1, -1, 69, -1, -1, -1, 61, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 258, 259, -1, 261, 262, -1, -1, 265, 266, 267, 268, -1, 97, -1, 272, 273, 101, 275, 276, 277, 278, 279, -1, -1, 97, 110, 111, 112, 101, -1, -1, -1, -1, -1, -1, -1, -1, 110, 111, 112, -1, -1, -1, -1, -1, -1, 131, -1, -1, -1, -1, -1, 137, 138, 139, -1, -1, 142, 131, -1, 145, -1, -1, -1, 137, 138, 139, -1, -1, 142, -1, -1, 145, }; #define YYFINAL 21 #ifndef YYDEBUG #define YYDEBUG 0 #endif #define YYMAXTOKEN 280 #if YYDEBUG const char * const yyname[] = { "end-of-file",0,0,0,0,0,0,0,0,0,"'\\n'",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,"'$'",0,"'&'",0,"'('","')'",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,"';'",0, "'='",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,"'^'",0, "'`'",0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,"'{'",0,"'}'",0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,"ANDAND","BACKBACK","BANG","CASE","COUNT","DUP","ELSE","END", "FLAT","FN","FOR","IF","IN","OROR","PIPE","REDIR","SREDIR","SUB","SUBSHELL", "SWITCH","TWIDDLE","WHILE","WORD","HUH", }; const char * const yyrule[] = { "$accept : rc", "rc : line end", "rc : error end", "end : END", "end : '\\n'", "cmdsa : cmd ';'", "cmdsa : cmd '&'", "line : cmd", "line : cmdsa line", "body : cmd", "body : cmdsan body", "cmdsan : cmdsa", "cmdsan : cmd '\\n'", "brace : '{' body '}'", "paren : '(' body ')'", "assign : first '=' word", "epilog :", "epilog : redir epilog", "redir : DUP", "redir : REDIR word", "redir : SREDIR word", "case : CASE words ';'", "case : CASE words '\\n'", "cbody : cmd", "cbody : case cbody", "cbody : cmdsan cbody", "iftail : cmd", "iftail : brace ELSE optnl cmd", "cmd :", "cmd : simple", "cmd : brace epilog", "cmd : IF paren optnl iftail", "cmd : FOR '(' word IN words ')' optnl cmd", "cmd : FOR '(' word ')' optnl cmd", "cmd : WHILE paren optnl cmd", "cmd : SWITCH '(' word ')' optnl '{' cbody '}'", "cmd : TWIDDLE optcaret word words", "cmd : cmd ANDAND optnl cmd", "cmd : cmd OROR optnl cmd", "cmd : cmd PIPE optnl cmd", "cmd : redir cmd", "cmd : assign cmd", "cmd : BANG optcaret cmd", "cmd : SUBSHELL optcaret cmd", "cmd : FN words brace", "cmd : FN words", "optcaret :", "optcaret : '^'", "simple : first", "simple : simple word", "simple : simple redir", "first : comword", "first : first '^' sword", "sword : comword", "sword : keyword", "word : sword", "word : word '^' sword", "comword : '$' sword", "comword : '$' sword SUB words ')'", "comword : COUNT sword", "comword : FLAT sword", "comword : '`' sword", "comword : '`' brace", "comword : BACKBACK word brace", "comword : BACKBACK word sword", "comword : '(' nlwords ')'", "comword : REDIR brace", "comword : WORD", "keyword : FOR", "keyword : IN", "keyword : WHILE", "keyword : IF", "keyword : SWITCH", "keyword : FN", "keyword : ELSE", "keyword : CASE", "keyword : TWIDDLE", "keyword : BANG", "keyword : SUBSHELL", "words :", "words : words word", "nlwords :", "nlwords : nlwords '\\n'", "nlwords : nlwords word", "optnl :", "optnl : optnl '\\n'", }; #endif #if YYDEBUG #include #endif #ifdef YYSTACKSIZE #undef YYMAXDEPTH #define YYMAXDEPTH YYSTACKSIZE #else #ifdef YYMAXDEPTH #define YYSTACKSIZE YYMAXDEPTH #else #define YYSTACKSIZE 10000 #define YYMAXDEPTH 10000 #endif #endif #define YYINITSTACKSIZE 200 int yydebug; int yynerrs; int yyerrflag; int yychar; short *yyssp; YYSTYPE *yyvsp; YYSTYPE yyval; YYSTYPE yylval; short *yyss; short *yysslim; YYSTYPE *yyvs; int yystacksize; #line 167 "parse.y" void initparse() { star = treecpy(mk(nVar, mk(nWord,"*", NULL, FALSE)), ealloc); nolist = treecpy(mk(nVar, mk(nWord,"ifs", NULL, FALSE)), ealloc); } #line 583 "y.tab.c" /* allocate initial stack or double stack size, up to YYMAXDEPTH */ static int yygrowstack() { int newsize, i; short *newss; YYSTYPE *newvs; if ((newsize = yystacksize) == 0) newsize = YYINITSTACKSIZE; else if (newsize >= YYMAXDEPTH) return -1; else if ((newsize *= 2) > YYMAXDEPTH) newsize = YYMAXDEPTH; i = yyssp - yyss; newss = yyss ? (short *)realloc(yyss, newsize * sizeof *newss) : (short *)malloc(newsize * sizeof *newss); if (newss == NULL) return -1; yyss = newss; yyssp = newss + i; newvs = yyvs ? (YYSTYPE *)realloc(yyvs, newsize * sizeof *newvs) : (YYSTYPE *)malloc(newsize * sizeof *newvs); if (newvs == NULL) return -1; yyvs = newvs; yyvsp = newvs + i; yystacksize = newsize; yysslim = yyss + newsize - 1; return 0; } #define YYABORT goto yyabort #define YYREJECT goto yyabort #define YYACCEPT goto yyaccept #define YYERROR goto yyerrlab #ifndef YYPARSE_PARAM #if defined(__cplusplus) || __STDC__ #define YYPARSE_PARAM_ARG void #define YYPARSE_PARAM_DECL #else /* ! ANSI-C/C++ */ #define YYPARSE_PARAM_ARG #define YYPARSE_PARAM_DECL #endif /* ANSI-C/C++ */ #else /* YYPARSE_PARAM */ #ifndef YYPARSE_PARAM_TYPE #define YYPARSE_PARAM_TYPE void * #endif #if defined(__cplusplus) || __STDC__ #define YYPARSE_PARAM_ARG YYPARSE_PARAM_TYPE YYPARSE_PARAM #define YYPARSE_PARAM_DECL #else /* ! ANSI-C/C++ */ #define YYPARSE_PARAM_ARG YYPARSE_PARAM #define YYPARSE_PARAM_DECL YYPARSE_PARAM_TYPE YYPARSE_PARAM; #endif /* ANSI-C/C++ */ #endif /* ! YYPARSE_PARAM */ int yyparse (YYPARSE_PARAM_ARG) YYPARSE_PARAM_DECL { register int yym, yyn, yystate; #if YYDEBUG register const char *yys; if ((yys = getenv("YYDEBUG"))) { yyn = *yys; if (yyn >= '0' && yyn <= '9') yydebug = yyn - '0'; } #endif yynerrs = 0; yyerrflag = 0; yychar = (-1); if (yyss == NULL && yygrowstack()) goto yyoverflow; yyssp = yyss; yyvsp = yyvs; *yyssp = yystate = 0; yyloop: if ((yyn = yydefred[yystate])) goto yyreduce; if (yychar < 0) { if ((yychar = yylex()) < 0) yychar = 0; #if YYDEBUG if (yydebug) { yys = 0; if (yychar <= YYMAXTOKEN) yys = yyname[yychar]; if (!yys) yys = "illegal-symbol"; printf("%sdebug: state %d, reading %d (%s)\n", YYPREFIX, yystate, yychar, yys); } #endif } if ((yyn = yysindex[yystate]) && (yyn += yychar) >= 0 && yyn <= YYTABLESIZE && yycheck[yyn] == yychar) { #if YYDEBUG if (yydebug) printf("%sdebug: state %d, shifting to state %d\n", YYPREFIX, yystate, yytable[yyn]); #endif if (yyssp >= yysslim && yygrowstack()) { goto yyoverflow; } *++yyssp = yystate = yytable[yyn]; *++yyvsp = yylval; yychar = (-1); if (yyerrflag > 0) --yyerrflag; goto yyloop; } if ((yyn = yyrindex[yystate]) && (yyn += yychar) >= 0 && yyn <= YYTABLESIZE && yycheck[yyn] == yychar) { yyn = yytable[yyn]; goto yyreduce; } if (yyerrflag) goto yyinrecovery; #if defined(lint) || defined(__GNUC__) goto yynewerror; #endif yynewerror: yyerror("syntax error"); #if defined(lint) || defined(__GNUC__) goto yyerrlab; #endif yyerrlab: ++yynerrs; yyinrecovery: if (yyerrflag < 3) { yyerrflag = 3; for (;;) { if ((yyn = yysindex[*yyssp]) && (yyn += YYERRCODE) >= 0 && yyn <= YYTABLESIZE && yycheck[yyn] == YYERRCODE) { #if YYDEBUG if (yydebug) printf("%sdebug: state %d, error recovery shifting\ to state %d\n", YYPREFIX, *yyssp, yytable[yyn]); #endif if (yyssp >= yysslim && yygrowstack()) { goto yyoverflow; } *++yyssp = yystate = yytable[yyn]; *++yyvsp = yylval; goto yyloop; } else { #if YYDEBUG if (yydebug) printf("%sdebug: error recovery discarding state %d\n", YYPREFIX, *yyssp); #endif if (yyssp <= yyss) goto yyabort; --yyssp; --yyvsp; } } } else { if (yychar == 0) goto yyabort; #if YYDEBUG if (yydebug) { yys = 0; if (yychar <= YYMAXTOKEN) yys = yyname[yychar]; if (!yys) yys = "illegal-symbol"; printf("%sdebug: state %d, error recovery discards token %d (%s)\n", YYPREFIX, yystate, yychar, yys); } #endif yychar = (-1); goto yyloop; } yyreduce: #if YYDEBUG if (yydebug) printf("%sdebug: state %d, reducing by rule %d (%s)\n", YYPREFIX, yystate, yyn, yyrule[yyn]); #endif yym = yylen[yyn]; yyval = yyvsp[1-yym]; switch (yyn) { case 1: #line 47 "parse.y" { parsetree = yyvsp[-1].node; YYACCEPT; } break; case 2: #line 48 "parse.y" { yyerrok; parsetree = NULL; YYABORT; } break; case 3: #line 51 "parse.y" { if (!heredoc(1)) YYABORT; } break; case 4: #line 52 "parse.y" { if (!heredoc(0)) YYABORT; } break; case 6: #line 56 "parse.y" { yyval.node = (yyvsp[-1].node != NULL ? mk(nNowait,yyvsp[-1].node) : yyvsp[-1].node); } break; case 8: #line 60 "parse.y" { yyval.node = (yyvsp[-1].node != NULL ? mk(nBody,yyvsp[-1].node,yyvsp[0].node) : yyvsp[0].node); } break; case 10: #line 64 "parse.y" { yyval.node = (yyvsp[-1].node == NULL ? yyvsp[0].node : yyvsp[0].node == NULL ? yyvsp[-1].node : mk(nBody,yyvsp[-1].node,yyvsp[0].node)); } break; case 12: #line 67 "parse.y" { yyval.node = yyvsp[-1].node; if (!heredoc(0)) YYABORT; } break; case 13: #line 69 "parse.y" { yyval.node = yyvsp[-1].node; } break; case 14: #line 71 "parse.y" { yyval.node = yyvsp[-1].node; } break; case 15: #line 73 "parse.y" { yyval.node = mk(nAssign,yyvsp[-2].node,yyvsp[0].node); } break; case 16: #line 75 "parse.y" { yyval.node = NULL; } break; case 17: #line 76 "parse.y" { yyval.node = mk(nEpilog,yyvsp[-1].node,yyvsp[0].node); } break; case 18: #line 79 "parse.y" { yyval.node = mk(nDup,yyvsp[0].dup.type,yyvsp[0].dup.left,yyvsp[0].dup.right); } break; case 19: #line 80 "parse.y" { yyval.node = mk(nRedir,yyvsp[-1].redir.type,yyvsp[-1].redir.fd,yyvsp[0].node); if (yyvsp[-1].redir.type == rHeredoc && !qdoc(yyvsp[0].node, yyval.node)) YYABORT; /* queue heredocs up */ } break; case 20: #line 83 "parse.y" { yyval.node = mk(nRedir,yyvsp[-1].redir.type,yyvsp[-1].redir.fd,yyvsp[0].node); if (yyvsp[-1].redir.type == rHeredoc && !qdoc(yyvsp[0].node, yyval.node)) YYABORT; /* queue heredocs up */ } break; case 21: #line 87 "parse.y" { yyval.node = mk(nCase, yyvsp[-1].node); } break; case 22: #line 88 "parse.y" { yyval.node = mk(nCase, yyvsp[-1].node); } break; case 23: #line 90 "parse.y" { yyval.node = mk(nCbody, yyvsp[0].node, NULL); } break; case 24: #line 91 "parse.y" { yyval.node = mk(nCbody, yyvsp[-1].node, yyvsp[0].node); } break; case 25: #line 92 "parse.y" { yyval.node = mk(nCbody, yyvsp[-1].node, yyvsp[0].node); } break; case 27: #line 95 "parse.y" { yyval.node = mk(nElse,yyvsp[-3].node,yyvsp[0].node); } break; case 28: #line 97 "parse.y" { yyval.node = NULL; } break; case 30: #line 99 "parse.y" { yyval.node = mk(nBrace,yyvsp[-1].node,yyvsp[0].node); } break; case 31: #line 100 "parse.y" { yyval.node = mk(nIf,yyvsp[-2].node,yyvsp[0].node); } break; case 32: #line 101 "parse.y" { yyval.node = mk(nForin,yyvsp[-5].node,yyvsp[-3].node,yyvsp[0].node); } break; case 33: #line 102 "parse.y" { yyval.node = mk(nForin,yyvsp[-3].node,star,yyvsp[0].node); } break; case 34: #line 103 "parse.y" { yyval.node = mk(nWhile,yyvsp[-2].node,yyvsp[0].node); } break; case 35: #line 104 "parse.y" { yyval.node = mk(nSwitch,yyvsp[-5].node,yyvsp[-1].node); } break; case 36: #line 105 "parse.y" { yyval.node = mk(nMatch,yyvsp[-1].node,yyvsp[0].node); } break; case 37: #line 106 "parse.y" { yyval.node = mk(nAndalso,yyvsp[-3].node,yyvsp[0].node); } break; case 38: #line 107 "parse.y" { yyval.node = mk(nOrelse,yyvsp[-3].node,yyvsp[0].node); } break; case 39: #line 108 "parse.y" { yyval.node = mk(nPipe,yyvsp[-2].pipe.left,yyvsp[-2].pipe.right,yyvsp[-3].node,yyvsp[0].node); } break; case 40: #line 109 "parse.y" { yyval.node = (yyvsp[0].node != NULL ? mk(nPre,yyvsp[-1].node,yyvsp[0].node) : yyvsp[-1].node); } break; case 41: #line 110 "parse.y" { yyval.node = (yyvsp[0].node != NULL ? mk(nPre,yyvsp[-1].node,yyvsp[0].node) : yyvsp[-1].node); } break; case 42: #line 111 "parse.y" { yyval.node = mk(nBang,yyvsp[0].node); } break; case 43: #line 112 "parse.y" { yyval.node = mk(nSubshell,yyvsp[0].node); } break; case 44: #line 113 "parse.y" { yyval.node = mk(nNewfn,yyvsp[-1].node,yyvsp[0].node); } break; case 45: #line 114 "parse.y" { yyval.node = mk(nRmfn,yyvsp[0].node); } break; case 49: #line 120 "parse.y" { yyval.node = (yyvsp[0].node != NULL ? mk(nArgs,yyvsp[-1].node,yyvsp[0].node) : yyvsp[-1].node); } break; case 50: #line 121 "parse.y" { yyval.node = mk(nArgs,yyvsp[-1].node,yyvsp[0].node); } break; case 52: #line 124 "parse.y" { yyval.node = mk(nConcat,yyvsp[-2].node,yyvsp[0].node); } break; case 54: #line 127 "parse.y" { yyval.node = mk(nWord, yyvsp[0].keyword, NULL, FALSE); } break; case 56: #line 130 "parse.y" { yyval.node = mk(nConcat,yyvsp[-2].node,yyvsp[0].node); } break; case 57: #line 132 "parse.y" { yyval.node = mk(nVar,yyvsp[0].node); } break; case 58: #line 133 "parse.y" { yyval.node = mk(nVarsub,yyvsp[-3].node,yyvsp[-1].node); } break; case 59: #line 134 "parse.y" { yyval.node = mk(nCount,yyvsp[0].node); } break; case 60: #line 135 "parse.y" { yyval.node = mk(nFlat, yyvsp[0].node); } break; case 61: #line 136 "parse.y" { yyval.node = mk(nBackq,nolist,yyvsp[0].node); } break; case 62: #line 137 "parse.y" { yyval.node = mk(nBackq,nolist,yyvsp[0].node); } break; case 63: #line 138 "parse.y" { yyval.node = mk(nBackq,yyvsp[-1].node,yyvsp[0].node); } break; case 64: #line 139 "parse.y" { yyval.node = mk(nBackq,yyvsp[-1].node,yyvsp[0].node); } break; case 65: #line 140 "parse.y" { yyval.node = yyvsp[-1].node; } break; case 66: #line 141 "parse.y" { yyval.node = mk(nNmpipe,yyvsp[-1].redir.type,yyvsp[-1].redir.fd,yyvsp[0].node); } break; case 67: #line 142 "parse.y" { yyval.node = mk(nWord, yyvsp[0].word.w, yyvsp[0].word.m, yyvsp[0].word.q); } break; case 68: #line 144 "parse.y" { yyval.keyword = "for"; } break; case 69: #line 145 "parse.y" { yyval.keyword = "in"; } break; case 70: #line 146 "parse.y" { yyval.keyword = "while"; } break; case 71: #line 147 "parse.y" { yyval.keyword = "if"; } break; case 72: #line 148 "parse.y" { yyval.keyword = "switch"; } break; case 73: #line 149 "parse.y" { yyval.keyword = "fn"; } break; case 74: #line 150 "parse.y" { yyval.keyword = "else"; } break; case 75: #line 151 "parse.y" { yyval.keyword = "case"; } break; case 76: #line 152 "parse.y" { yyval.keyword = "~"; } break; case 77: #line 153 "parse.y" { yyval.keyword = "!"; } break; case 78: #line 154 "parse.y" { yyval.keyword = "@"; } break; case 79: #line 156 "parse.y" { yyval.node = NULL; } break; case 80: #line 157 "parse.y" { yyval.node = (yyvsp[-1].node != NULL ? (yyvsp[0].node != NULL ? mk(nLappend,yyvsp[-1].node,yyvsp[0].node) : yyvsp[-1].node) : yyvsp[0].node); } break; case 81: #line 159 "parse.y" { yyval.node = NULL; } break; case 83: #line 161 "parse.y" { yyval.node = (yyvsp[-1].node != NULL ? (yyvsp[0].node != NULL ? mk(nLappend,yyvsp[-1].node,yyvsp[0].node) : yyvsp[-1].node) : yyvsp[0].node); } break; #line 1062 "y.tab.c" } yyssp -= yym; yystate = *yyssp; yyvsp -= yym; yym = yylhs[yyn]; if (yystate == 0 && yym == 0) { #if YYDEBUG if (yydebug) printf("%sdebug: after reduction, shifting from state 0 to\ state %d\n", YYPREFIX, YYFINAL); #endif yystate = YYFINAL; *++yyssp = YYFINAL; *++yyvsp = yyval; if (yychar < 0) { if ((yychar = yylex()) < 0) yychar = 0; #if YYDEBUG if (yydebug) { yys = 0; if (yychar <= YYMAXTOKEN) yys = yyname[yychar]; if (!yys) yys = "illegal-symbol"; printf("%sdebug: state %d, reading %d (%s)\n", YYPREFIX, YYFINAL, yychar, yys); } #endif } if (yychar == 0) goto yyaccept; goto yyloop; } if ((yyn = yygindex[yym]) && (yyn += yystate) >= 0 && yyn <= YYTABLESIZE && yycheck[yyn] == yystate) yystate = yytable[yyn]; else yystate = yydgoto[yym]; #if YYDEBUG if (yydebug) printf("%sdebug: after reduction, shifting from state %d \ to state %d\n", YYPREFIX, *yyssp, yystate); #endif if (yyssp >= yysslim && yygrowstack()) { goto yyoverflow; } *++yyssp = yystate; *++yyvsp = yyval; goto yyloop; yyoverflow: yyerror("yacc stack overflow"); yyabort: return (1); yyaccept: return (0); } rc-1.7.4/NEWS0000644000175000017500000000216312524737653007567 00000000000000Highlights of changes since rc-1.7. See ChangeLog for further details. Portability. A fix to the autoconfiguration means that the nasty longjmp() code is now omitted for all modern Unix systems; previously rc only did the Right Thing on Linux. The test for large files in trip.rc was removed, as this causes indigestion on file systems that don't support sparse files (the configuration and implementation of large file support is still present of course). Bug fixes. Fix a use of uninitialized memory. Fix for CVE-2014-1936. Broken symlinks now glob correctly. The variables $prompt and $version are now exported if they are inherited from the environment when rc starts. EIO handling is now enabled for readline too. A few bogosities in the history program were fixed. A regression introduced by the fix for the $(a.b) quoting bug was fixed, and that bug was correctly fixed. New features. Added $"x as a synonym for $^x. Minimal support for various alternative line editing libraries. Filename completion with GNU readline now quotes special characters. Documentation. Licence updated to the zlib licence. Toby Goodwin 2015-05-13 rc-1.7.4/ChangeLog0000644000175000017500000006450212524733574010645 00000000000000Changes since 1.2: (Too many to count!) A memory stomping bug was fixed (provoked by assigning a variable to its old value plus something else). Better signal handling; a real signal handler which manages a queue of pending signals was added. rc now ignores SIGQUIT and traps SIGINT even in non-interactive mode. Thus, rc ed.sh will not do mysterious things if the shell script "ed.sh" calls a command like "ed" and then you hit ^C. rc now opens 0, 1, 2 on /dev/null if they are inherited closed. rc -o prevents this. A couple of stupid O(n^2) string appends were replaced with O(n) loops. This should make foo=`{cat /etc/termcap} bar=$^foo a little faster :-) Returning a list of signals from a function is now legal, so "return $status" should always work. The code has been revised, new printing routines have been added. rc no longer uses redundant braces when exporting functions. A first stab at a verification suite has been added (trip.rc). (someone, please help me make this comprehensive!) rc -p now does not initialize functions from the environment. This should make it easier to write shell scripts that don't need to assume anything about the environment. Inherited ignored signals are now ignored in the current shell and passed on ignored to the child processes. whatis -s also reflects this information. A file descriptor leak in the /dev/fd implementation of >{} was fixed. A variable set to '' was not imported from the environment; this has been fixed. Changes since 1.3beta: New Makefile/config.h setup. builtin echo may now be conditionally included out, to use a Goldwynism. builtin exit takes any legal exit status. If the status is not all zeros, rc exits with 1. (having "exit sigiot" produce a core dump would be going a little far, I think.) limit does not append a unit after a zero limit; 0g was too confusing. exec > /nonexistentfile does not cause rc to exit any more. If a noninteractive rc is started with sigint ignored, rc does not install its own signal handler. error messages produced by rc in a subshell were cleaned up. (rc erroneously reset the 'interactive' flag after a fork) print.c was cleaned up a little; no functionality was changed, but should be more portable now. a bug in rc-1.3beta (not previous versions) was fixed: setting the first element of $path to '' caused PATH to be exported as '':etc.. getopt's "illegal option" message was gratuitously changed to something less abrupt. some dead code was removed from input.c %term was changed to %token in parse.y; apparently newer yacc's don't grok %term any more. a race condition in the signal handler was fixed. the variable in for() was getting evaluated each time through the loop (e.g., for (`{echo i;date>[1=2]} in 1 2 3)echo $i would print the date three times). This was cleaned up. a redundant fork() was removed from walk.c; this showed up when running a braced command with a redirection in the background. e.g., {a;b}>c& man pages for history and rc were cleaned up by david (thanks). rc set SIGQUIT and SIGTERM to SIG_DFL on background jobs---even when trying to do old-style backgrounding (i.e., don't use process groups, just ignore SIGINT & SIGQUIT & SIGTERM). $0 is now changed to the name of the signal when entering a signal handler. Thus it's possible to write code like fn sigint sigterm sigquit { switch ($0) { case sigint ... case sigterm ... wait with no arguments now prints the pid of any and all children that died with a signal. e.g., ; wait 25321: terminated 25325: terminated as opposed to ; wait terminated An error saving/restoring state in the input stream code would cause rc to exit with the (erroneous) command: eval '|[a' FIFO's were not removed in a backgrounded command, e.g., cat <{echo hi}& Changes since rc-1.4beta: getopt was renamed to rc_getopt to avoid libc collisions. $cdpath with a / in it caused a cd to sometimes have two //'s at the front of the path. This is reserved by POSIX, so I changed it to skip one of the /'s. signal handling now emulates sh in the way I described in a previous message: the race condition present in older rc's whereby some SIGINTs got lost is now gone; any SIGINT received during a wait() is acted upon at the end of the wait(), unless of course SIGINT is being deliberately ignored. getopt was renamed to avoid naming conflicts with libc. Also a sound move since rc_getopt is no longer quite libc-getopt compatible; I had to add in a mechanism for resetting getopt. signal handler code in fn.c was cleaned up; there were several bugs in rc-1.4beta, notably the shell sometimes spawned background jobs with SIGTERM ignored. I took the opportunity to make things a little cleaner here. a quasi-memory leak in the code for while() was fixed: a long-running while that had rc commands allocating memory in it could cause the shell to grow without bounds. I fixed this by placing the while loop (*and* test!) inside a new allocation arena each time through the loop. A new configuration parameter, NOJOB, was added to allow you to force v7-style backgrounding (no setpgrp, ignore SIGINT and SIGTERM). The FIFO code was reworked a little. It should be more robust now--- FIFOs get removed at the end of the command of the argument list that they were on: fn foo {echo $*; cat $*} foo<{echo hi} now works as expected. Also FIFO names are pushed onto the exception stack so that their removal occurs in the face of exceptions and so on. A memory leak in treefree() was plugged up --- the root node of a function was not getting freed. Changes since rc-1.4: General changes: Some small memory leaks/uninit references revealed by Purify. $bqstatus for querying the exit status of a backquote. Globbing through unreadable directories. More options to whatis. History append which always re-opens the file (avoids inconsistencies over multiple NFS-mounted accesses to $history). Support "rc -s". --------- Makefile: Added comment referring to README for yacc/malloc problem. uiltins.c: Added more options to whatis, protected rlimit prototypes with #ifndef SYSVR4, renamed SIGCHK to sigchk. except.c: Patched nl_on_intr printing to happen only in interactive shells. exec.c: Added comment explaining nl_on_intr variable, renamed SIGCHK to sigchk. fn.c: Replaced by-hand consing of exception stack etc. for signal handler execution with call to funcall(). Replaced fun2str call with call on print routines. footobar.c: Got rid of memory leak in get_name(), parenthesize count, flat and var nodes for correctness in unparsing, removed list2str, made get_name use nalloc space, merge in a better parse_var from es. glob.c: Split out a test so that closedir is called correctly, renamed SIGCHK to sigchk. glom.c: Added bqstatus, renamed SIGCHK to sigchk, removed spurious setsigdefaults, patched uninit memory reference, rename "clear" to "memzero", wait for bq subproc to finish on EINTR. hash.c: Added options to function/variable print code. history/history.c: Added '@' to the list of chars which can precede an ignored '-'. input.c: Got rid of tiny memory leak in closefds, got rid of uninit memory reference in popinput, moved nul ignored check into realgchar(), changed history append to always reopen the history file, replaced SIGCHK with sigchk. Freed memory returned by call to readline(). lex.c: Corrected typo in comment, moved nul character ignore code to input routines. main.c: Added -s flag. nalloc.c: Added convenience feature to erealloc. (Allow NULL parameter) print.c: Changed use of va_start so broken compilers can compile print code. proto.h: Added fake memset. rc.h: Replaced clear() function prototype with a macro call on memset(), removed SIGCHK, fixed prototypes. signal.c: Removed unconditional exit in catcher code, renamed SIGCHK to sigchk. status.c: Rewrite sgetstatus breaking out strstatus so that bqstatus can be set from glom routines. utils.c: Got rid of clear() (use memset from C library), rename SIGCHK to sigchk. var.c: Got rid of memory leak in listassign(), converted list2str() call to something using the print routines. version.c: New version string. wait.c: Got rid of memory leak in rc_fork, renamed SIGCHK to sigchk. walk.c: Fixed pre-redirection bug, removed spurious setsigdefaults(), renamed SIGCHK to sigchk. Changes since rc-1.5beta1 Configuration: rc now uses GNU autoconf. Portability: mksignal works on HPUX 10. Portability: resources can be (quad_t). Bug: if rc was started with SIGCLD == SIG_IGN (e.g. by Solaris's rshd) it would loop. Fixed by resetting SIGCLD to SIG_DFL if it was SIG_IGN when rc was started. Portability: POSIXish systems don't have NGROUPS. Changes since rc-1.5b2 Configuration: rc now uses GNU automake. Portability: use sigsetjmp() when available. Portability: improve tests for quad_t. Configuration: don't leave FIFOs in /tmp when configuring. Configuration: let configure find `-ltermcap' when using readline. Configuration: pick up default path from config.cache. Bug: sense of most HAVE_RESTARTABLE_SYSCALLS tests was wrong. Bug: print prompts with `-i', even with editline / readline. Testing: just say `false' (not `/bin/false'). Bug: confusion over gid_t versus GETGROUPS_T in which.c. Feature: `-V' option added to report version number. Configuration: remove version.c; `id' is defined in main.c now. Bug: clear list of living children after fork(); `{ ls & wait } |cat' no longer hangs or panics. Testing: add regression test for above. Tidiness: all the system call wrappers to prevent calls being restarted now live in system-bsd.c. The configure script decides whether to build system.c or system-bsd.c. Also, signal.c is more careful to only declare slowbuf if it will be needed. Tidiness: similarly, configure decides whether to build execve.c or not. Portability: test for ssize_t and use it where available; use long if there's no ssize_t. Portability: use sigsetjmp where it's available and appropriate. If no sigsetjmp, just use sigjmp; this probably fails in a traditional SysV environment. Portability: test explicitly for SysV SIGCLD semantics. Main (and dubious) benefit is that you can now define a function called `sigcld' on systems where there is no signal called SIGCLD! Bug: rc has its own memory allocator; don't use malloc directly. Bug: the rc_wait() wrapper is only needed on systems which restart system calls. On Linux, in particular, the wrapper leads to a race which causes rc to hang (or panic in later versions). Other systems apparently don't exercise this race. Bug: waitforall() must return if rc_wait4() returns with errno == EINTR. Otherwise, the rc builtin `wait' cannot be interrupted if there are background processes (although apparently only if there is a handler for SIGINT). Portability: dreadful hack to track down the real locations of signal.h to find signal names. rc now builds under CygWin32! Portability: replace above dreadful hack with mksignal.c, contributed by Vincent Broman. Portability: use POSIX wait() macros (WIFEXITED and friends). Unfortunately, POSIX omitted to supply WIFDUMPED, so this doesn't buy a great deal. Distribution: remove the dependencies of y.tab.[ch] on parse.y from Makefile.am. The justification for this is that, unless you're hacking on rc's grammar, there's no reason to use anything other than the distributed files (which were generated with byacc and very lightly edited to silence a few gcc warnings). Enhancement: the example in addon.c wasn't very useful, since it depended on files which weren't included with the distribution. There is now a working, if trivial, example. Tidiness: the code was compiled with as many gcc warnings enabled as I could find. Very few problems turned up. Some unused function arguments were removed. Where unused arguments could not be removed (because the function is one of a set that must all have the same prototype), they were renamed to `ignore'. Portability: some versions of readline define the name `Function', which rc also uses. Its use in rc has been renamed to `rc_Function'. Documentation: the `history' man page didn't explain what end of line does in editing mode. It now does. Bug: the interaction with readline was broken, particularly with respect to signal handling. I've incorporated some changes from Tom Culliton which should sort this out. Unfortunately, we now have 3 different code paths for readline 2.1, readline 2.2, and editline :-(. Configuration: if you say `--with-readline' or `--with-editline' it is now an error if the appropriate library is not found. Bug: rc didn't work on RedHat 5 systems. This is because of peculiarities in the handling of signals and system calls on this system (the C library attempts to fake restartable system calls). The fix involves testing at configure time for sigaction() and SA_INTERRUPT: if both exist, we set up sys_signal() to be an "always interrupt" wrapper around sigaction(). (If we don't have sigaction(), we use signal() and check for restartable system calls as usual.) Portability: on AIX, lconv is defined by the system header files. Rename lconv in print.c to avoid the clash. Testing: add a test that `cd' prints the new directory if we are interactive and the directory was found via $cdpath. 1998-07-23 Testing: fix silly typo in above test. Configuration: `--with-vrl' added to support Gert-Jan Vons's readline library. 1998-07-24 Portability: the autoconf macro AC_FUNC_SETPGRP doesn't work on OSF1: that system supports arguments to setpgrp(), but also has a prototype in to say that it is void. Fix this by defining our own RC_FUNC_SETPGRP for now. Bug: was included twice in some source files. Configuration: automake wants `make distclean' to remove *.tab.c. Rename y.tab.[ch] to parse.[ch] to avoid this. 1998-07-27 Portability: on Ultrix, `make trip' fails with `malloc: Invalid argument'. Problem is that getgroups(0, NULL) in which.c returns -1. Add new configure test to check for POSIX getgroups() and fall back to NGROUPS if it's not available. The magic is done by "getgroups.h". Tidiness: extract magic into "wait.h". 1998-10-20 Tidiness: include prototype for add_history() when doing editline. Documentation: document the `-V' flag and mention Linux's /proc/self/fd as alternative to /dev/fd. 1998-10-21 Bug: shells need to be prepared for bogus applications to have set their input file descriptor to non-blocking, and set it back. Tidiness: is in "proto.h", so nothing else needs to include it explicitly. Documentation: document the ^A bug. 1998-10-22 Tidiness: makenonblock() was a rather poor choice of name for a function which makes a file descriptor *not* nonblocking :-). 1998-10-26 Portability: apparently some systems declare `char *basename(const char *)' in system header files. Changing our basename() (in history.c) to match this prototype allows it to be compiled on such systems, and is harmless. (Harmless, that is, if no system declares `char *basename(char *)'.) 1998-10-28 Bug: system-bsd.c needs to include "wait.h". Warnings: some versions of gcc warn about "ambiguous" `else' clauses. Portability: assigning va_list objects doesn't work everywhere (Linux on the PowerPC, specifically). Use the C 9x invention va_copy() instead, if it exists, otherwise fall back to assignment. Documentation: help HP-UX users by mentioning that you need `cc -Ae'. Also, HP-UX make will build rc in a separate directory. Tidiness: remove unused functions from print.c. Anybody wanting to use this library in another project should follow the pointer in the documentation to an improved version. 1998-10-29 Bug: the "null character ignored" warning was printed with the wrong line number. Fix by adding an offset argument to pr_error. Portability: work around readline's broken treatment of a non-blocking input file descriptor. Testing: add `testing' auxiliary program; use `testing' to generate null character on the fly (since it's a nuisance having a literal null character in trip.rc); reset sigexit in `fn fail'; add test for nonblocking input file descriptor; fix test for cdpath. Portability: include before . 1998-10-30 Portability: rename basename() to rc_basename(), since the former is quite widespread, and has a variety of different definitions (none of them, of course, static). Portability: work around i386 GCC 2.7.2.3 optimization bug triggered by a (really quite simple) expression in history.c. 1998-12-04 Bug: a debugging statement was left in history.c by mistake. Bug: `history' needs to check for `me' character preceded by `/', as well as all the other options. An invocation like ../rc-1.5/- no longer loops. Documentation: it seems better to have but a single URL in the README file, which indirects to the other places of interest. 1998-12-08 Portability: use AM_PROG_CC_STDC. This obviates the need for a special hack on HP-UX. Documentation: document all the flags to `whatis'. 1998-12-09 Tidiness: latest autoconf version has fixed AC_FUNC_SETPGRP, so we no longer need to supply our own. Portability: test for va_copy() needs to include . 1998-12-10 Tidiness: move most of the configure.in nastiness into acinclude.m4. 1998-12-11 Tidiness: the release date now only needs to be changed in one place. 1999-01-05 Documentation: the Bell Labs rc now has the list flattening operator, but spelt $"foo. 1999-01-11 Release: rc-1.5b4. 1999-01-19 Documentation: document the `-s' option. Also, arrange the option documentation in alphabetical order. Tidiness: just install `history' to `$(bindir)/-'; don't create an extra link (which `make clean' failed to remove). 1999-01-22 Bug: `-s' should not imply `-i'. Testing: add regression test for `-s' behaviour. 1999-01-27 Documentation: default path was out of date; minor consistency improvements. Release: rc-1.5b5. 1999-02-15 Portability: AM_INIT_AUTOMAKE calls AC_ARG_PROGRAM and AC_PROG_INSTALL. Don't do it explicitly. For once, the configure script gets smaller! Program name transformations work right now. Documentation: note that rc has no `set' builtin; fix weird variable name example; any character except `=' may be used in a variable name; document bqstatus; document rc's exit status; other tidying. 1999-03-01 Documentation: document the yacc-imposed limit on ; separated commands in a line. 1999-05-06 Portability: tgetent() might be in -lncurses instead of -ltermcap. 1999-05-10 Portability: Linux *almost* has SysV SIGCLD semantics, and we need to detect them. Bug: if we reset SIGCLD to SIG_DFL, we need to record the fact in the sighandlers[] array. 1999-05-12 Documentation: note that `$(a.b)' syntax only mostly works, and that list definitions in exported functions are noisier than they need to be. Release: rc-1.5b6. 1999-05-19 Documentation: minor fixes to man page. 1999-05-26 Tidiness: `make distclean' now removes sigmsgs.[ch]. 1999-05-28 Release: rc-1.6. 1999-08-19 Portability: the proposed C 9x __va_copy() macro is called that, not va_copy(), as I thought. Furthermore, it is defined to be a macro, so we don't need to use autoconf to check for it. 1999-10-11 Bug: absolute globs don't need special case in doglob(). Avoids creating path names like `//tmp', which is a UNC path under CygWin. 1999-10-12 Portability: status.c assumes traditional Unix layout of 0 and 1 exit statuses in the parent, which is not shared by BeOS. Add mkstatval.c. 1999-10-13 Bug: a read(2) error in fdgchar() should call rc_raise(), not rc_exit(). This bug is easily tickled on systems (like Linux) which allow you to open(2) but not read(2) directories: `. /tmp'. In all previous versions of rc, this caused the shell to exit. Portability: use POSIX strerror() where it's available; fake it with sys_errlist[] where not. Feature: replace `-V' with `version' variable. 1999-10-14 Portability: exporting `path' causes indigestion in CygWin. Since it's virtually impossible for a child `rc' process to inherit `path' (which I consider a bug, but it's not going to be fixed now), simply don't export `path'. Portability: add /usr/bsd to default default path. Documentation: failing to search $path for a `.' command is at least an incompatibility with Tenth Edition rc, and probably a bug. 1999-11-10 Feature: make `version' a list. 1999-11-11 Documentation: when running configure, you need to set LDFLAGS for `-L' options, not LIBS. Release: rc-1.6b1. 1999-12-10 Bug: absolute globs do still need a special case. `/*' works again now, but we still avoid creating names like `//tmp/foo'. Bug: avoid a putative race condition in signal.c. Documentation: extra parentheses around `~' and `!' expressions are forbidden. Tom Duff's paper is not distributed with rc, but is available on the web. Release: rc-1.6b2. 2000-04-19 Bug: isatty() tests in input.c are relevant to any fd, not just 0. Now `. -i /dev/tty' works right. Bug: fn sigexit wasn't always cleared in child shells. Bug: `~ () '*'' dumped core. 2000-05-25 Portability: need special runes for read() returning EIO under job control systems. 2000-06-20 Feature: add `-I' flag (definitively not interactive) for compatibility with Plan 9 rc. 2000-11-27 Portability: configure fails to detect strerror() on NetBSD; we need to include . 2001-06-18 Bug: you can't pass a short to a stdargs function! 2001-09-27 Documentation: we don't consider that `.' failing to search path is a bug. Feature: ^A in lists is now handled transparently. 2001-10-01 Bug: it's no longer possible to use parentheses to sneak a word that needs quoting past the "quoting detector", so `fn x { echo $(x.y) }' now works both in the current rc and its descendants. Documentation: mention the catastrophic effects of a semantic error in fn prompt. 2001-10-03 Feature: exported lists no longer use redundant parentheses. 2001-10-04 Bug: semantic errors in `fn prompt' no longer throw rc into a tailspin. Feature: don't export $cdpath or $home (the lower-case versions). 2001-10-12 Release: rc-1.6b3. 2001-10-25 Feature: large file support (thanks Scott Schwartz, Chris Siebenmann). 2001-10-29 Bug: space vs tab confusion in commented out Makefile rules to rebuild parser (thanks Gary Carvell). 2001-10-31 Documentation: subscripted variables don't work in here documents. Release: rc-1.6c4. 2001-11-01 Bug: more wrongly ordered header file includes (thanks Callum Gibson). 2001-11-06 Portability: rename print.c::utoa() to rc_utoa() to avoid QNX name clash; use "sh -c 'test ...'" in trip.rc for missing standalone `test' on QNX (thanks Stefan Dalibor). 2001-11-20 Documentation: tighten up various descriptions, and include some more examples. Release: rc-1.6c5. 2001-11-23 Bug: parselimit() was broken in various ways (thanks Chris Siebenmann). 2002-02-08 Bug: yet more wrongly ordered header file includes. Release: rc-1.6c6. 2002-04-03 Feature: make $version less magical, and exportable if it's changed from its default value. Same for $prompt (thank Erik Quanstrom). Bug: make $bqstatus and $status not exportable. Feature: "stuttering" colons for multiple replacements in the history programs (thanks Callum Gibson). 2002-05-22 Documentation: possible warning in tripping.c (thanks Dan Moniz). Release: rc-1.6c7. 2002-06-18 Release: rc-1.7. 2002-07-25 Bug: fix globbing of broken symlinks. 2002-07-31 Bug: readline doesn't handle EIO either. 2002-08-15 Bug: variables that are sometimes exported (i.e. $prompt and $version) need to be made exportable if they are inherited from the environment. Portability: don't call sigaction() for SIGKILL or SIGSTOP; don't hand a garbage signal mask to sigaction() (thanks Jeremy Fitzhardinge). Also, remove use of SA_INTERRUPT (SUSv3, BSD, etc. have SA_RESTART with the inverted meaning). 2002-08-20 Bug: don't call ealloc(0) on systems where getgroups() doesn't return egid (thanks Chris Siebenmann). 2002-11-27 Bug: history dumps core if more colons than substitutions (thanks Callum Gibson); history fails to avoid itself if it's the only command; history writes and reads outside allocated memory. Configuration: upgrade to autoconf-2.56 and automake-1.7.1. 2003-07-17 Testing: remove test for large file support, as it causes indigestion on file systems that don't support sparse files (thanks Scott Schwartz). 2003-07-22 Release: rc-1.7.1. 2003-09-24 Tidiness: minor improvements to input.c. 2014-02-26 Bug: fix for CVE-2014-1936 from Jakub Wilk. 2014-06-29 Documentation: update email and web addresses. 2014-08-31 Feature: support quoting for filename completion in GNU readline. 2014-09-01 Bug: quoting of glob characters was broken (thanks Christian Neukirchen); fix the "sneaky parens" bug properly (thanks Wolfgang Zekoll). Feature: allow $"x as a synonym for $^x Release: rc-1.7.2. 2015-04-03 Packaging: the rc.spec file was very out-of-date. 2015-04-04 Portability: the comment from 1999-08-19 may well have been true at the time, but the final version of the C99 standard called varargs copying macro va_copy(). 2015-04-07 Portability: look in -ltinfo for tgetent. Packaging: various autoconf / automake updates and tweaks. 2015-04-14 Bug: in initinput(), the call ugchar(EOF) used the ungetcount member of the top Input structure without initializing it. Thanks to Jeff Johnson for finding this, Robert Scheck for reporting it, and Uli Drepper for implementing MALLOC_PERTURB_, a cheap way to find uses of uninitialized memory. 2015-04-18 Licensing: tweaked to match exactly the "zlib with acknowledgement" license which is used by nunit and is already approved by various distros. 2015-04-20 Release: rc-1.7.3. 2015-05-12 Licensing: due to GPL compatibility concerns, the license is changed again to the "zlib" license. (N.B. This license change was agreed and approved by Byron Rakitzis, who is the copyright holder.) Testing: swap arguments to mktemp to be kinder to NetBSD (thanks Piotr Meyer). 2015-05-13 Release: rc-1.7.4. rc-1.7.4/open.c0000644000175000017500000000243512507445074010171 00000000000000/* open.c: to insulate from the rest of rc. */ #include "rc.h" #include /* Opens a file with the necessary flags. Assumes the following declaration for redirtype: enum redirtype { rFrom, rCreate, rAppend, rHeredoc, rHerestring }; */ static const int mode_masks[] = { /* rFrom */ O_RDONLY, /* rCreate */ O_TRUNC | O_CREAT | O_WRONLY, /* rAppend */ O_APPEND | O_CREAT | O_WRONLY }; extern int rc_open(const char *name, redirtype m) { if ((unsigned) m >= arraysize(mode_masks)) panic("bad mode passed to rc_open"); return open(name, mode_masks[m], 0666); } /* make a file descriptor blocking. return value indicates whether the desciptor was previously set to non-blocking. */ extern bool makeblocking(int fd) { int flags; if ((flags = fcntl(fd, F_GETFL)) == -1) { uerror("fcntl"); rc_error(NULL); } if (! (flags & O_NONBLOCK)) return FALSE; flags &= ~O_NONBLOCK; if (fcntl(fd, F_SETFL, (long) flags) == -1) { uerror("fcntl"); rc_error(NULL); } return TRUE; } /* make a file descriptor the same pgrp as us. Returns TRUE if it changes anything. */ extern bool makesamepgrp(int fd) { pid_t grp; grp = getpgrp(); if (tcgetpgrp(fd) == grp) return FALSE; if (tcsetpgrp(fd, grp) < 0) { uerror("tcsetgrp"); return FALSE; } return TRUE; } rc-1.7.4/var.c0000644000175000017500000001341012507445074010013 00000000000000/* var.c: provide "public" functions for adding and removing variables from the symbol table */ #include "rc.h" #include "input.h" static void colonassign(char *, List *, bool); static void listassign(char *, List *, bool); static int hasalias(char *); static char *const aliases[] = { "home", "HOME", "path", "PATH", "cdpath", "CDPATH" }; /* assign a variable in List form to a name, stacking if appropriate */ extern void varassign(char *name, List *def, bool stack) { Variable *new; List *newdef = listcpy(def, ealloc); /* important to do the listcpy first; get_var_place() frees old values */ new = get_var_place(name, stack); new->def = newdef; new->extdef = NULL; set_exportable(name, TRUE); if (streq(name, "TERM") || streq(name, "TERMCAP")) termchange(); } /* assign a variable in string form. Check to see if it is aliased (e.g., PATH and path) */ extern bool varassign_string(char *extdef) { static bool aliasset[arraysize(aliases)] = { FALSE, FALSE, FALSE, FALSE, FALSE, FALSE }; char *name = get_name(extdef); Variable *new; int i; if (name == NULL) return FALSE; /* add it to bozo env */ if ((i = hasalias(name)) != -1) { aliasset[i] = TRUE; i ^= 1; /* set i to the "opposite" case subscript and */ if (i&1 && aliasset[i]) /* don't alias variables that are already set in upper case */ return TRUE; } new = get_var_place(name, FALSE); new->def = NULL; new->extdef = ealloc(strlen(extdef) + 1); strcpy(new->extdef, extdef); if (i != -1) alias(name, varlookup(name), FALSE); set_exportable(name, TRUE); return TRUE; } /* Return a List based on a name lookup. If the list is in external (string) form, convert it to internal (List) form. Treat $n (n is an integer) specially as $*(n). Also check to see if $status is being dereferenced. (we lazily evaluate the List associated with $status) */ extern List *varlookup(char *name) { Variable *look; List *ret, *l; int sub; if (streq(name, "apids")) return sgetapids(); if (streq(name, "status")) return sgetstatus(); if (*name != '\0' && (sub = a2u(name)) != -1) { /* handle $1, $2, etc. */ for (l = varlookup("*"); l != NULL && sub != 0; --sub) l = l->n; if (l == NULL) return NULL; ret = nnew(List); ret->w = l->w; ret->m = NULL; ret->n = NULL; return ret; } look = lookup_var(name); if (look == NULL) return NULL; /* not found */ if (look->def != NULL) return look->def; if (look->extdef == NULL) return NULL; /* variable was set to null, e.g., a=() echo foo */ ret = parse_var(look->extdef); if (ret == NULL) { look->extdef = NULL; return NULL; } return look->def = ret; } /* lookup a variable in external (string) form, converting if necessary. Used by makeenv() */ extern char *varlookup_string(char *name) { Variable *look; look = lookup_var(name); if (look == NULL) return NULL; if (look->extdef != NULL) return look->extdef; if (look->def == NULL) return NULL; return look->extdef = mprint("%F=%W", name, look->def); } /* remove a variable from the symtab. "stack" determines whether a level of scoping is popped or not */ extern void varrm(char *name, bool stack) { int i = hasalias(name); if (streq(name, "*") && !stack) { /* when assigning () to $*, we want to preserve $0 */ varassign("*", varlookup("0"), FALSE); return; } delete_var(name, stack); if (i != -1) delete_var(aliases[i^1], stack); } /* assign a value (List) to a variable, using array "a" as input. Used to assign $* */ extern void starassign(char *dollarzero, char **a, bool stack) { List *s, *var; var = nnew(List); var->w = dollarzero; if (*a == NULL) { var->n = NULL; varassign("*", var, stack); return; } var->n = s = nnew(List); while (1) { s->w = *a++; if (*a == NULL) { s->n = NULL; break; } else s = s->n = nnew(List); } varassign("*", var, stack); } /* (ugly name, huh?) assign a colon-separated value to a variable (e.g., PATH) from a List (e.g., path) */ static void colonassign(char *name, List *def, bool stack) { List dud; if (def == NULL) { varassign(name, NULL, stack); return; } dud.w = nprint("%-L", def, ":"); dud.n = NULL; varassign(name, &dud, stack); } /* assign a List variable (e.g., path) from a colon-separated string (e.g., PATH) */ static void listassign(char *name, List *def, bool stack) { List *val, *r; char *v, *w; if (def == NULL) { varassign(name, NULL, stack); return; } v = def->w; r = val = nnew(List); while ((w = strchr(v, ':')) != NULL) { *w = '\0'; r->w = ncpy(v); *w = ':'; v = w + 1; r = r->n = nnew(List); } r->w = ncpy(v); r->n = NULL; varassign(name, val, stack); } /* check to see if a particular variable is aliased; return -1 on failure, or the index */ static int hasalias(char *name) { int i; for (i = 0; i < arraysize(aliases); i++) if (streq(name, aliases[i])) return i; return -1; } /* alias a variable to its lowercase equivalent. function pointers are used to specify the conversion function */ extern void alias(char *name, List *s, bool stack) { static void (*vectors[])(char *, List *, bool) = { varassign, varassign, colonassign, listassign, colonassign, listassign }; int i = hasalias(name); if (i != -1) (*vectors[i])(aliases[i^1], s, stack); /* xor hack to reverse case of alias entry */ } extern void prettyprint_var(int fd, char *name, List *s) { int i; static const char * const keywords[] = { "if", "in", "fn", "for", "else", "switch", "while", "case" }; if (s == NULL) { fprint(fd, "%S=()\n", name); return; } if (streq(name, "*")) { s = s->n; if (s == NULL) return; /* Don't print $0, and if $* is not set, skip it */ } for (i = 0; i < arraysize(keywords); i++) if (streq(keywords[i], name)) { fprint(fd, "%#S=", name); goto value; } fprint(fd, "%S=", name); value: fprint(fd, s->n == NULL ? "%L\n" : "(%L)\n", s, " "); } rc-1.7.4/history.c0000644000175000017500000001525012507445074010730 00000000000000/* history.c -- primitive history mechanism Paul Haahr & Byron Rakitzis, July 1991. This program mimics the att v8 = and == history programs. The edit() algorithm was adapted from a similar program that Boyd Roberts wrote, but otherwise all the code has been written from scratch. edit() was subsequently redone by Hugh Redelmeier in order to correctly deal with tab characters in the source line. BUGS: There is an implicit assumption that commands are no more than 1k characters long. */ #include "rc.h" #include static const char id[] = "$Release: @(#)" PACKAGE " " VERSION " " RELDATE " $"; #define CHUNKSIZE 65536 static struct { char *old, *new; int reps; /* no. of repetitions. i.e. 1 means sub twice. */ } *replace; static char **search, *progname, *history; static char me; /* typically ':' or '-' */ static bool editit = FALSE, printit = FALSE; static int nreplace = 0, nsearch = 0; static FILE *histfile; void *ealloc(size_t n) { void *p = (void *) malloc(n); if (p == NULL) { perror("malloc"); exit(1); } return p; } void *erealloc(void *p, size_t n) { p = (void *) realloc(p, n); if (p == NULL) { perror("realloc"); exit(1); } return p; } static char *newstr() { return ealloc((size_t)1024); } static char *rc_basename(char *s) { char *t = strrchr(s, '/'); return (t == NULL) ? s : t + 1; } /* stupid O(n^2) substring matching routine */ static char *isin(char *target, char *pattern) { size_t plen = strlen(pattern); size_t tlen = strlen(target); for (; tlen >= plen; target++, --tlen) if (strncmp(target, pattern, plen) == 0) return target; return NULL; } /* replace the first match in the string with "new" */ static char *sub(char *s, char *old, char *new) { char *t, *u; t = isin(s, old); if (!t) return s; u = newstr(); *t = '\0'; while (*old != '\0') old++, t++; strcpy(u, s); strcat(u, new); strcat(u, t); return u; } static char *edit(char *s) { char *final, *f, *end; int col; bool ins; start: fprintf(stderr, "%s\n", s); f = final = newstr(); end = s + strlen(s); col = 0; ins = FALSE; for (;; col++) { int c = getchar(); if (c == me && col == 0) { int peekc = getchar(); if (peekc == '\n') return NULL; ungetc(peekc, stdin); } if (c == '\n') { if (col == 0) return s; while (s < end) /* copy remainder of string */ *f++ = *s++; *f = '\0'; s = final; goto start; } else if (ins || s>=end) { /* col need not be accurate -- tabs need not be interpreted */ *f++ = c; } else { switch (c) { case '+': while (s < end) *f++ = *s++; *f = '\0'; continue; case '%': c = ' '; /* FALLTHROUGH */ default: *f++ = c; break; case EOF: exit(1); /* NOTREACHED */ case ' ': if (*s == '\t') { int oldcol = col; for (;; col++) { int peekc; if ((col&07) == 07) { *f++ = '\t'; /* we spaced past a tab */ break; } peekc = getchar(); if (peekc != ' ') { ungetc(peekc, stdin); if (peekc != '\n') { /* we spaced partially into a tab */ do { *f++ = ' '; oldcol++; } while (oldcol <= col); } break; } } } else { *f++ = *s; } break; case '#': break; case '$': end = s; /* truncate s */ continue; /* skip incrementing s */ case '^': ins = TRUE; continue; /* skip incrementing s */ case '\t': for (;; col++) { *f = s 0) { count += nread; if (size - count == 0) buf = erealloc(buf, size *= 4); } if (nread == -1) { perror(history); exit(1); } *last = buf + count; return buf; } static char *getcommand(void) { char *s, *t; static char *hist = NULL, *last; if (hist == NULL) { hist = readhistoryfile(&last); *--last = '\0'; /* replaces final newline */ ++hist; /* start beyond sentinel */ } again: s = last; if (s < hist) return NULL; while (s >= hist && *s != '\n') --s; *s = '\0'; last = s++; /* * if the command contains the "me" character at the start of the line * or after any of [`{|()@/] then try again */ for (t = s; *t != '\0'; ++t) if (*t == me) { char *u = t - 1; while (u >= s && (*u == ' ' || *u == '\t')) --u; if (u < s) goto again; switch (*u) { case '`': case '@': case '(': case ')': case '{': case '|': case '/': goto again; default: break; } } return s; } int main(int argc, char **argv) { int i; char *s; s = progname = rc_basename(argv[0]); me = *s++; if (*s == me) { s++; editit = TRUE; } if (*s == 'p') { s++; printit = TRUE; } /* Nahh... if (*s != '\0') { fprintf(stderr, "\"%s\": bad name for history program\n", progname); exit(1); } */ if (argc > 1) { replace = ealloc((argc - 1) * sizeof *replace); search = ealloc((argc - 1) * sizeof *search); } for (i = 1; i < argc; i++) if ((s = strchr(argv[i], ':')) == NULL) search[nsearch++] = argv[i]; else { *(char *)s = '\0'; /* do we confuse ps too much? */ replace[nreplace].reps = 0; while(*(++s) == ':') { replace[nreplace].reps++; } replace[nreplace].old = argv[i]; replace[nreplace].new = s; nreplace++; } next: s = getcommand(); if (s == NULL) { fprintf(stderr, "command not matched\n"); return 1; } for (i = 0; i < nsearch; i++) if (!isin(s, search[i])) goto next; for (i = 0; i < nreplace; i++) if (!isin(s, replace[i].old)) goto next; else { int j; for (j = 0; j <= replace[i].reps; j++) s = sub(s, replace[i].old, replace[i].new); } if (editit) { s = edit(s); if (s == NULL) goto next; } fseek(histfile, 0, 2); /* 2 == end of file. i.e., append command to $history */ fprintf(histfile, "%s\n", s); fclose(histfile); if (printit) printf("%s\n", s); else { char *shell = getenv("SHELL"); if (!editit) fprintf(stderr, "%s\n", s); if (shell == NULL) shell = "/bin/sh"; execl(shell, rc_basename(shell), "-c", s, NULL); perror(shell); exit(1); } return 0; } rc-1.7.4/except.c0000644000175000017500000000645512507445074010526 00000000000000#include "rc.h" #include #include #include "input.h" #include "jbwrap.h" /* A return goes back stack frames to the last return. A break does not. A signal goes to the last interactive level. (see below) */ bool nl_on_intr = TRUE; static Estack *estack; /* add an exception to the input stack. */ extern void except(ecodes e, Edata data, Estack *ex) { ex->prev = estack; estack = ex; estack->e = e; estack->data = data; if (e == eError || e == eBreak || e == eReturn) estack->interactive = interactive; } /* remove an exception, restore last interactive value */ extern void unexcept() { switch (estack->e) { default: break; case eError: interactive = estack->interactive; break; case eArena: restoreblock(estack->data.b); break; case eFifo: unlink(estack->data.name); break; case eFd: close(estack->data.fd); break; } estack = estack->prev; } /* Raise an exception. The rules are pretty complicated: you can return from a loop inside a function, but you can't break from a function inside of a loop. On errors, rc_raise() goes back to the LAST INTERACTIVE stack frame. If no such frame exists, then rc_raise() exits the shell. This is what happens, say, when there is a syntax error in a noninteractive shell script. While traversing the exception stack backwards, rc_raise() also removes input sources (closing file-descriptors, etc.) and pops instances of variables that have been pushed onto the variable stack (e.g., for a function call (for $*) or a local assignment). */ extern void rc_raise(ecodes e) { if (e == eError && rc_pid != getpid()) exit(1); /* child processes exit on an error/signal */ for (; estack != NULL; estack = estack->prev) if (estack->e != e) { if (e == eBreak && estack->e != eArena) rc_error("break outside of loop"); else if (e == eReturn && estack->e == eError) /* can return from loops inside functions */ rc_error("return outside of function"); switch (estack->e) { default: break; case eVarstack: varrm(estack->data.name, TRUE); break; case eArena: restoreblock(estack->data.b); break; case eFifo: unlink(estack->data.name); break; case eFd: close(estack->data.fd); break; } } else { if (e == eError && !estack->interactive) { popinput(); } else { Jbwrap *j = estack->data.jb; interactive = estack->interactive; estack = estack->prev; siglongjmp(j->j, 1); } } rc_exit(1); /* top of exception stack */ } extern bool outstanding_cmdarg() { return estack->e == eFifo || estack->e == eFd; } extern void pop_cmdarg(bool remove) { for (; estack != NULL; estack = estack->prev) switch (estack->e) { case eFifo: if (remove) unlink(estack->data.name); break; case eFd: if (remove) close(estack->data.fd); break; default: return; } } /* exception handlers */ extern void rc_error(char *s) { pr_error(s, -1); set(FALSE); redirq = NULL; cond = FALSE; /* no longer inside conditional */ rc_raise(eError); } extern void sigint(int s) { if (s != SIGINT) panic("s != SIGINT in sigint catcher"); /* this is the newline you see when you hit ^C while typing a command */ if (interactive && nl_on_intr) fprint(2, "\n"); nl_on_intr = TRUE; redirq = NULL; cond = FALSE; rc_raise(eError); } rc-1.7.4/getgroups.h0000644000175000017500000000047612507445074011257 00000000000000#if HAVE_GETGROUPS #if HAVE_POSIX_GETGROUPS /* We love POSIX. */ #else /* OK, so you've got getgroups, but you don't have the POSIX semantics of a zero first argument. The conclusion is that you're on a reasonably pure BSD system, and we can include for NGROUPS. */ #include #endif #endif rc-1.7.4/print.c0000644000175000017500000001722712515531750010365 00000000000000/* print.c -- formatted printing routines (Paul Haahr, 12/91) */ #include "rc.h" #include #define PRINT_ALLOCSIZE ((size_t)64) #define SPRINT_BUFSIZ ((size_t)1024) #define MAXCONV 256 /* * conversion functions * true return -> flag changes only, not a conversion */ #define Flag(name, flag) \ static bool name(Format *format, int ignore) { \ format->flags |= flag; \ return TRUE; \ } Flag(uconv, FMT_unsigned) Flag(rc_lconv, FMT_long) #if HAVE_QUAD_T Flag(qconv, FMT_quad) #endif Flag(altconv, FMT_altform) Flag(leftconv, FMT_leftside) Flag(dotconv, FMT_f2set) static bool digitconv(Format *format, int c) { if (format->flags & FMT_f2set) format->f2 = 10 * format->f2 + c - '0'; else { format->flags |= FMT_f1set; format->f1 = 10 * format->f1 + c - '0'; } return TRUE; } static bool zeroconv(Format *format, int ignore) { if (format->flags & (FMT_f1set | FMT_f2set)) return digitconv(format, '0'); format->flags |= FMT_zeropad; return TRUE; } static void pad(Format *format, size_t len, int c) { while (len-- != 0) fmtputc(format, c); } static bool sconv(Format *format, int ignore) { char *s = va_arg(format->args, char *); if ((format->flags & FMT_f1set) == 0) fmtcat(format, s); else { size_t len = strlen(s), width = format->f1 - len; if (format->flags & FMT_leftside) { fmtappend(format, s, len); pad(format, width, ' '); } else { pad(format, width, ' '); fmtappend(format, s, len); } } return FALSE; } static char *rc_utoa(unsigned long u, char *t, unsigned int radix, const char *digit) { if (u >= radix) { t = rc_utoa(u / radix, t, radix, digit); u %= radix; } *t++ = digit[u]; return t; } static void intconv(Format *format, unsigned int radix, int upper, const char *altform) { static const char * const table[] = { "0123456789abcdefghijklmnopqrstuvwxyz", "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ", }; char padchar; size_t len, pre, zeroes, padding, width; long n, flags; unsigned long u; char number[64], prefix[20]; if (radix > 36) return; flags = format->flags; #if HAVE_QUAD_T if (flags & FMT_quad) n = va_arg(format->args, quad_t); else #endif if (flags & FMT_long) n = va_arg(format->args, long); else n = va_arg(format->args, int); pre = 0; if ((flags & FMT_unsigned) || n >= 0) u = n; else { prefix[pre++] = '-'; u = -n; } if (flags & FMT_altform) while (*altform != '\0') prefix[pre++] = *altform++; len = rc_utoa(u, number, radix, table[upper]) - number; if ((flags & FMT_f2set) && (size_t) format->f2 > len) zeroes = format->f2 - len; else zeroes = 0; width = pre + zeroes + len; if ((flags & FMT_f1set) && (size_t) format->f1 > width) { padding = format->f1 - width; } else padding = 0; padchar = ' '; if (padding > 0 && flags & FMT_zeropad) { padchar = '0'; if ((flags & FMT_leftside) == 0) { zeroes += padding; padding = 0; } } if ((flags & FMT_leftside) == 0) pad(format, padding, padchar); fmtappend(format, prefix, pre); pad(format, zeroes, '0'); fmtappend(format, number, len); if (flags & FMT_leftside) pad(format, padding, padchar); } static bool cconv(Format *format, int ignore) { fmtputc(format, va_arg(format->args, int)); return FALSE; } static bool dconv(Format *format, int ignore) { intconv(format, 10, 0, ""); return FALSE; } static bool oconv(Format *format, int ignore) { intconv(format, 8, 0, "0"); return FALSE; } static bool xconv(Format *format, int ignore) { intconv(format, 16, 0, "0x"); return FALSE; } static bool pctconv(Format *format, int ignore) { fmtputc(format, '%'); return FALSE; } static bool badconv(Format *ignore, int ign0re) { panic("bad conversion character in printfmt"); /* NOTREACHED */ return FALSE; /* hush up gcc -Wall */ } /* * conversion table management */ static Conv fmttab[MAXCONV]; static void inittab(void) { int i; for (i = 0; i < MAXCONV; i++) fmttab[i] = badconv; fmttab['s'] = sconv; fmttab['c'] = cconv; fmttab['d'] = dconv; fmttab['o'] = oconv; fmttab['x'] = xconv; fmttab['%'] = pctconv; fmttab['u'] = uconv; fmttab['l'] = rc_lconv; fmttab['#'] = altconv; fmttab['-'] = leftconv; fmttab['.'] = dotconv; #if HAVE_QUAD_T fmttab['q'] = qconv; #endif fmttab['0'] = zeroconv; for (i = '1'; i <= '9'; i++) fmttab[i] = digitconv; } extern bool (*fmtinstall(int c, bool (*f)(Format *, int)))(Format *, int) { /*Conv fmtinstall(int c, Conv f) {*/ Conv oldf; if (fmttab[0] == NULL) inittab(); c &= MAXCONV - 1; oldf = fmttab[c]; if (f != NULL) fmttab[c] = f; return oldf; } /* * functions for inserting strings in the format buffer */ extern void fmtappend(Format *format, const char *s, size_t len) { while (format->buf + len > format->bufend) { size_t split = format->bufend - format->buf; memcpy(format->buf, s, split); format->buf += split; s += split; len -= split; (*format->grow)(format, len); } memcpy(format->buf, s, len); format->buf += len; } extern void fmtcat(Format *format, const char *s) { fmtappend(format, s, strlen(s)); } /* * printfmt -- the driver routine */ extern int printfmt(Format *format, const char *fmt) { unsigned const char *s = (unsigned const char *) fmt; if (fmttab[0] == NULL) inittab(); for (;;) { int c = *s++; switch (c) { case '%': format->flags = format->f1 = format->f2 = 0; do c = *s++; while ((*fmttab[c])(format, c)); break; case '\0': return format->buf - format->bufbegin + format->flushed; default: fmtputc(format, c); break; } } } /* * the public entry points */ extern int fmtprint(Format *format, const char *fmt,...) { int n = -format->flushed; va_list ap, saveargs; va_start(ap, fmt); va_copy(saveargs, format->args); va_copy(format->args, ap); n += printfmt(format, fmt); va_end(format->args); va_copy(format->args, saveargs); return n + format->flushed; } static void fprint_flush(Format *format, size_t ignore) { size_t n = format->buf - format->bufbegin; char *buf = format->bufbegin; format->flushed += n; format->buf = format->bufbegin; writeall(format->u.n, buf, n); } extern int fprint(int fd, const char *fmt,...) { char buf[1024]; Format format; va_list ap; format.buf = buf; format.bufbegin = buf; format.bufend = buf + sizeof buf; format.grow = fprint_flush; format.flushed = 0; format.u.n = fd; va_start(ap, fmt); va_copy(format.args, ap); printfmt(&format, fmt); va_end(format.args); fprint_flush(&format, 0); return format.flushed; } static void memprint_grow(Format *format, size_t more) { char *buf; size_t len = format->bufend - format->bufbegin + 1; size_t used = format->buf - format->bufbegin; len = (len >= more) ? len * 2 : ((len + more) + PRINT_ALLOCSIZE) &~ (PRINT_ALLOCSIZE - 1); if (format->u.n) buf = erealloc(format->bufbegin, len); else { buf = nalloc(len); memcpy(buf, format->bufbegin, used); } format->buf = buf + used; format->bufbegin = buf; format->bufend = buf + len - 1; } static char *memprint(Format *format, const char *fmt, char *buf, size_t len) { format->buf = buf; format->bufbegin = buf; format->bufend = buf + len - 1; format->grow = memprint_grow; format->flushed = 0; printfmt(format, fmt); *format->buf = '\0'; return format->bufbegin; } extern char *mprint(const char *fmt,...) { Format format; char *result; va_list ap; format.u.n = 1; va_start(ap, fmt); va_copy(format.args, ap); result = memprint(&format, fmt, ealloc(PRINT_ALLOCSIZE), PRINT_ALLOCSIZE); va_end(format.args); return result; } extern char *nprint(const char *fmt,...) { Format format; char *result; va_list ap; format.u.n = 0; va_start(ap, fmt); va_copy(format.args, ap); result = memprint(&format, fmt, nalloc(PRINT_ALLOCSIZE), PRINT_ALLOCSIZE); va_end(format.args); return result; }