watershed-7/0000755000000000000000000000000012057407202010075 5ustar watershed-7/COPYING0000644000000000000000000004310312057406532011136 0ustar GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Lesser General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rights to work written entirely by you; rather, the intent is to exercise the right to control the distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program (or with a work based on the Program) on a volume of a storage or distribution medium does not bring the other work under the scope of this License. 3. You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or executable form with such an offer, in accord with Subsection b above.) The source code for a work means the preferred form of the work for making modifications to it. For an executable work, complete source code means all the source code for all modules it contains, plus any associated interface definition files, plus the scripts used to control compilation and installation of the executable. However, as a special exception, the source code distributed need not include anything that is normally distributed (in either source or binary form) with the major components (compiler, kernel, and so on) of the operating system on which the executable runs, unless that component itself accompanies the executable. If distribution of executable or object code is made by offering access to copy from a designated place, then offering equivalent access to copy the source code from the same place counts as distribution of the source code, even though third parties are not compelled to copy the source along with the object code. 4. You may not copy, modify, sublicense, or distribute the Program except as expressly provided under this License. Any attempt otherwise to copy, modify, sublicense or distribute the Program is void, and will automatically terminate your rights under this License. However, parties who have received copies, or rights, from you under this License will not have their licenses terminated so long as such parties remain in full compliance. 5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. If, as a consequence of a court judgment or allegation of patent infringement or for any other reason (not limited to patent issues), conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this License, they do not excuse you from the conditions of this License. If you cannot distribute so as to satisfy simultaneously your obligations under this License and any other pertinent obligations, then as a consequence you may not distribute the Program at all. For example, if a patent license would not permit royalty-free redistribution of the Program by all those who receive copies directly or indirectly through you, then the only way you could satisfy both it and this License would be to refrain entirely from distribution of the Program. If any portion of this section is held invalid or unenforceable under any particular circumstance, the balance of the section is intended to apply and the section as a whole is intended to apply in other circumstances. It is not the purpose of this section to induce you to infringe any patents or other property right claims or to contest validity of any such claims; this section has the sole purpose of protecting the integrity of the free software distribution system, which is implemented by public license practices. Many people have made generous contributions to the wide range of software distributed through that system in reliance on consistent application of that system; it is up to the author/donor to decide if he or she is willing to distribute software through any other system and a licensee cannot impose that choice. This section is intended to make thoroughly clear what is believed to be a consequence of the rest of this License. 8. If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) 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 of the License, 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, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. watershed-7/watershed.c0000644000000000000000000003741712057406532012250 0ustar /* * watershed - an auxiliary verb for optimising away * unnecessary runs of idempotent commands * * watershed is Copyright 2007 Canonical Ltd * * * 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 of the License, 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, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * See the file XXXXX for a full list of credits information (often * installed as XXXXX. * */ /* * * usage: watershed [] [...] * * options: * -d|--state-dir * default is /var/run/watershed for uid 0 * $HOME/.watershed for others * -i|--command-id * * files used: * /.lock lockfile * /.cohort cohort * * default is * hex(sha256(argv[0]+'\0' + argv[1]+'\0' ... argv[argc-1]+'\0') * '=' * mangled argv[0] (all chars [^-+_0-9A-Za-z] replaced with ? * and max 32 chars) * * exit status: * 127 - something went wrong, or process died with some other signal * SIGPIPE - process died with SIGPIPE * x - process called _exit(x) * * stdin/stdout/stderr: * * If watershed exits 127 due to some unexpected problem, a message * is printed to stderr explaining why (obviously). * * If a watershed invocation ends up running the process, the process * simply inherits stdin/out/err. Otherwise stdin/stdout are not used. * * If the process run for us by another invocation of watershed exits * zero, or watershed die with the same signal as the process * (currently just SIGPIPE), nothing is printed to stderr. Otherwise * (ie, failure of the actual process, in another invocation), * watershed prints a description of the wait status to stderr, much * as the shell might. * */ /* * gcc -Wall -Wwrite-strings -Wmissing-prototypes watershed.c -o watershed /usr/lib/libnettle.a */ /* * * Theory: * * We consider only invocations with a specific command id (and state * directory), since other invocations are completely independent by * virtue of having different state file pathnames and thus different * state files. Normally, a command id corresponds to invocations * with a particular set of command line arguments and a state * directory corresponds to a particular euid; environment variable * settings and other inherited process properties are disregarded. * * A `cohort' is a set of invocations which can be coalesced into one * run of the command. For each cohort there is a file, the cohort * file (which may not yet exist, may exist and have a name, or may * be unliked). * * An `invocation' is an invocation of the `watershed' program. A * `process' is an invocation of the requested command. * * There is always one current cohort, in one of the following * two states: * * * Empty * No invocations are in this cohort yet. * The cohort filename is ENOENT. * This is the initial state for a cohort, and the legal next * state is Accumulating. * * * Accumulating * The process for this run has not yet started, so that new * invocations arriving would be satisfied if this cohort were to * run. * The cohort filename refers to this cohort's file. * The legal next state for the cohort is Ready. * * Additionally, there may be older cohorts in the following states: * * * Ready * The command for this cohort has not yet been run. * The cohort file has no name and is empty. * Only one cohort, the lockholder's, may be in this state. * The next legal states are Running, or exceptionally Forgotten * (if the lockholder crashes and is the only invocation in the * cohort). * * * Running * The lockholder is running the command for this cohort. * This state is identical to Ready from the point of view * of all invocations except the lockholder. * The legal next states are Done (the usual case), or (if the * lockholder crashes) Ready or Forgotten. * * * Done * The main process for this run has finished. * The cohort file has no name and contains sizeof(int) * bytes, the `status' value from waitpid. * The legal next state is Forgotten. * * * Forgotten * All invocations have finished and the cohort file no longer * exists. This is the final state. * * Only the lockholder may move a cohort between states, except that * any invocation may make the current Empty cohort become * Accumulating, and that the kernel will automatically move a cohort * from Running to Ready or from Done to Forgotten, when appropriate. * * * Algorithm: * * 1. Open the cohort file (O_CREAT|O_RDWR) so our cohort is * Accumulating/Ready/ * Running/Done * * 2. Acquire lock (see below) so lockholder's cohort is * Accumulating/Ready/Done * 3. fstat the open cohort file * If it is nonempty: Done * Read status from it and exit. * Otherwise, if nonzero link count: Accumulating * Unlink the cohort filename * Otherwise: Ready * * 4. Fork and run the command Running * and wait for it * * 5. Write the wait status to the cohort file Done * * * 6. Release the lock so we are no longer lockholder * but our cohort is still * Done * * 8. Exit Done/Forgotten * * If an invocation crashes (ie, if watershed itself fails, rather * than if the command does) then that invocation's caller will be * informed of the error. * * If the lockholder crashes with the cohort in: * * Accumulating: * The cohort remains in Accumulating and another invocation can * become the lockholder. If there are never any other * invocations then the lockfile and cohort file will not be * cleaned up (see below). * * Running/Ready: * The cohort goes from Running back to Ready (see above) and * another invocation in the same cohort will become the * lockholder and run it. If there is no other invocation in * the cohort the cohort goes to Forgotten although the lockfile * will not be cleaned up - see below. * * Done: * If there are no more invocations, the cohort is Forgotten but * the lockfile is not cleaned up. * * Lockfile: * * There is one lock for all cohorts. The lockholder is the * invocation which holds the fcntl lock on the file whose name is * the lockfile. The lockholder (and no-one else) may unlink the * lockfile. * * To acquire the lock: * * 1. Open the lockfile (O_CREAT|O_RDWR) * 2. Acquire fcntl lock (F_SETLKW) * 3. fstat the open lockfile and stat the lockfile filenmae * If inode numbers disagree, close lockfile and start * again from the beginning. * * To release the lock, unlink the lockfile and then either close it * or exit. Crashing will also release the lock but leave the * lockfile lying around (which is slightly untidy but not * incorrect); if this is a problem a cleanup task could periodically * acquire and release the lock for each lockfile found: * * Cleanup: * * As described above and below, stale cohort files and lockfiles can * result from invocations which crashed if the same command is never * run again. Such cohorts are always in Empty or Accumulating. * * If it became necessary to clean up stale cohort files and * lockfiles resulting from crashes, the following algorithm should * be executed for each lockfile found, as a cleanup task: * * 1. Acquire the lock. * This makes us the lockholder. and the current cohort is in * Empty/Accumulating * * so now that cohort is * 2. Unlink the cohort file, ignoring ENOENT. Ready/Forgotten * 3. Release the lock. Ready/Forgotten * 4. Exit. Ready/Forgotten * * This consists only of legal transitions, so if current cohort * wasn't stale, it will have been moved to Ready and some other * invocation in this cohort will become the lockholder and as normal * from step 4 of the main algorithm. If the cohort was stale it * will go to Forgotten straight away. * * A suitable cleanup script, on a system with with-lock-ex, is: */ // #!/bin/sh // set -e // if [ $# != 1 ]; echo >&2 'usage: cleanup '; exit 1; fi // cd "$1" // for f in ./*.lock; do // with-lock-ex -w rm -f "${f%.lock}.cohort" // done /* */ #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static const struct option os[]= { { "--state-dir", 1,0,'d' }, { "--command-id",1,0,'i' }, { 0 } }; static const char *state_dir, *command_id, *command; static const char *lock_path, *cohort_path; static int cohort_fd, lock_fd; #define _(x) gettext(x) #define NOEINTR_TYPED(type,assign) do{ \ while ((assign)==(type)-1 && errno==EINTR) {} \ }while(0) #define NOEINTR(assign) \ NOEINTR_TYPED(int,(assign)) #define CHECKED(value,what) do{ \ NOEINTR(r= (value)); \ if (r<0) diee((what)); \ }while(0) static void badusage(void) { fputs(_("usage: watershed [] ...\n" "options: -d|--state-dir -i|--command-id \n"), stderr); exit(127); } static void die(const char *m) { fprintf(stderr,_("watershed: error: %s\n"), m); exit(127); } static void diee(const char *m) { fprintf(stderr,_("watershed: error: %s failed: %s\n"), m, strerror(errno)); exit(127); } static void dieep(const char *action, const char *path) { fprintf(stderr,_("watershed: error: could not %s `%s': %s\n"), action, path, strerror(errno)); exit(127); } static char *m_vasprintf(const char *fmt, va_list al) { char *s; int r; r= vasprintf(&s,fmt,al); if (r==-1) diee("vasprintf"); return s; } static char *m_asprintf(const char *fmt, ...) { char *s; va_list al; va_start(al,fmt); s= m_vasprintf(fmt,al); va_end(al); return s; } static void parse_args(int argc, char *const *argv) { int o; for (;;) { o= getopt_long(argc, argv, "+d:i:", os,0); if (o==-1) break; switch (o) { case 'd': state_dir= optarg; break; case 'i': command_id= optarg; break; default: badusage(); } } command= argv[optind]; if (!command) badusage(); if (!state_dir) state_dir= getenv("WATERSHED_STATEDIR"); if (!state_dir) { uid_t u= geteuid(); if (u==(uid_t)-1) diee("getuid"); if (u) { const char *home= getenv("HOME"); if (!home) die(_("HOME not set, no --state-dir option" " supplied, not root")); state_dir= m_asprintf("%s/.watershed", home); } else { state_dir= "/var/run/watershed"; } } if (!command_id) { char *const *ap; struct sha256_ctx sc; unsigned char dbuf[SHA256_DIGEST_SIZE], *p; char *construct, *q; int i, c; sha256_init(&sc); for (ap= argv+optind; *ap; ap++) sha256_update(&sc,strlen(*ap)+1,*ap); sha256_digest(&sc,sizeof(dbuf),dbuf); construct= m_asprintf("%*s#%.32s", (int)sizeof(dbuf)*2,"", command); for (i=sizeof(dbuf), p=dbuf, q=construct; i; i--,p++,q+=2) sprintf(q,"%02x",*p); *q++= '='; while ((c=*q++)) { if (!(c=='-' || c=='+' || c=='_' || isalnum((unsigned char)c))) q[-1]= '?'; } command_id= construct; } lock_path= m_asprintf("%s/%s.lock", state_dir, command_id); cohort_path= m_asprintf("%s/%s.cohort", state_dir, command_id); } static void acquire_lock(void) { struct stat current_stab, our_stab; struct flock fl; int r; for (;;) { NOEINTR( lock_fd= open(lock_path, O_CREAT|O_RDWR, 0600) ); if (lock_fd<0) diee("open lock"); memset(&fl,0,sizeof(fl)); fl.l_type= F_WRLCK; fl.l_whence= SEEK_SET; CHECKED( fcntl(lock_fd, F_SETLKW, &fl), "acquire lock" ); CHECKED( fstat(lock_fd, &our_stab), "fstat our lock"); NOEINTR( r= stat(lock_path, ¤t_stab) ); if (!r && our_stab.st_ino == current_stab.st_ino && our_stab.st_dev == current_stab.st_dev) break; if (r && errno!=ENOENT) diee("fstat current lock"); close(lock_fd); } } static void release_lock(void) { int r; CHECKED( unlink(lock_path), "unlink lock"); } static void report(int status) { int v; if (WIFEXITED(status)) { v= WEXITSTATUS(status); if (v) fprintf(stderr,_("watershed: `%s' failed with error exit status %d" " (in another invocation)\n"), command, v); exit(status); } if (WIFSIGNALED(status)) { v= WTERMSIG(status); assert(v); if (v == SIGPIPE) raise(v); fprintf(stderr, WCOREDUMP(status) ? _("watershed: `%s' died due to fatal signal %s (core dumped)\n") : _("watershed: `%s' died due to fatal signal %s\n"), command, strsignal(v)); } else { fprintf(stderr, _("watershed: `%s' failed with" " crazy wait status 0x%x\n"), command, status); } exit(127); } int main(int argc, char *const *argv) { int status, r, dir_created=0, l; unsigned char *p; struct stat cohort_stab; pid_t c, c2; setlocale(LC_MESSAGES,""); /* not LC_ALL, see use of isalnum below */ parse_args(argc,argv); for (;;) { NOEINTR( cohort_fd= open(cohort_path, O_CREAT|O_RDWR, 0644) ); if (cohort_fd>=0) break; if (errno!=ENOENT) dieep(_("open/create cohort state file"), cohort_path); if (dir_created++) die("open cohort state file still ENOENT after mkdir"); NOEINTR( r= mkdir(state_dir,0700) ); if (r && errno!=EEXIST) dieep(_("create state directory"), state_dir); } acquire_lock(); CHECKED( fstat(cohort_fd, &cohort_stab), "fstat our cohort"); if (cohort_stab.st_size) { if (cohort_stab.st_size < sizeof(status)) die(_("cohort status file too short (disk full?)")); else if (cohort_stab.st_size != sizeof(status)) die("cohort status file too long"); NOEINTR( r= read(cohort_fd,&status,sizeof(status)) ); if (r==-1) diee("read cohort"); if (r!=sizeof(status)) die("cohort file read wrong length"); release_lock(); report(status); } if (cohort_stab.st_nlink) CHECKED( unlink(cohort_path), "unlink our cohort"); NOEINTR_TYPED(pid_t, c= fork() ); if (c==(pid_t)-1) diee("fork"); if (!c) { close(cohort_fd); close(lock_fd); execvp(command, argv+optind); fprintf(stderr,_("watershed: failed to execute `%s': %s\n"), command, strerror(errno)); exit(127); } NOEINTR( c2= waitpid(c, &status, 0) ); if (c2==(pid_t)-1) diee("waitpid"); if (c2!=c) die("waitpid gave wrong pid"); for (l=sizeof(status), p=(void*)&status; l>0; l-=r, p+=r) CHECKED( write(cohort_fd,p,l), _("write result status")); release_lock(); if (!WIFEXITED(status)) report(status); exit(WEXITSTATUS(status)); } watershed-7/Makefile0000644000000000000000000000274012057406532011545 0ustar # Makefile for watershed # # Originally based on that from udev # Copyright (C) 2004-2005 Kay Sievers # # Released under the GNU General Public License, version 2. # PROG = watershed OBJ = HEADERS = GEN_HEADERS = MAN_PAGES = prefix = etcdir = ${prefix}/etc sbindir = ${prefix}/sbin usrbindir = ${prefix}/usr/bin usrsbindir = ${prefix}/usr/sbin libudevdir = ${prefix}/lib/udev mandir = ${prefix}/usr/share/man configdir = ${etcdir}/udev/ INSTALL = /usr/bin/install -c INSTALL_PROGRAM = ${INSTALL} INSTALL_DATA = ${INSTALL} -m 644 INSTALL_SCRIPT = ${INSTALL_PROGRAM} CC = gcc LD = gcc E = @echo Q = @ LIB_OBJS += -l:libnettle.a all: $(PROG) $(MAN_PAGES) .PHONY: all .DEFAULT: all %.o: %.c $(GEN_HEADERS) $(E) " CC " $@ $(Q) $(CC) -c $(CFLAGS) $< -o $@ $(PROG): %: $(HEADERS) %.o $(OBJS) $(E) " LD " $@ $(Q) $(LD) $(LDFLAGS) $@.o $(OBJS) -o $@ $(LIBUDEV) $(LIB_OBJS) # man pages %.8: %.xml $(E) " XMLTO " $@ $(Q) xmlto man $? .PRECIOUS: %.8 clean: $(E) " CLEAN " $(Q) rm -f $(PROG) $(OBJS) $(GEN_HEADERS) *.o .PHONY: clean install-bin: all $(INSTALL_PROGRAM) -D $(PROG) $(DESTDIR)$(libudevdir)/$(PROG) .PHONY: install-bin uninstall-bin: - rm $(DESTDIR)$(libudevdir)/$(PROG) .PHONY: uninstall-bin install-man: @echo "Please create a man page for this tool." .PHONY: install-man uninstall-man: @echo "Please create a man page for this tool." .PHONY: uninstall-man install-config: @echo "no config file to install" .PHONY: install-config watershed-7/debian/0000755000000000000000000000000012057407202011317 5ustar watershed-7/debian/changelog0000644000000000000000000000377112057407200013177 0ustar watershed (7) raring; urgency=low * Use correct compiler when cross-building. -- Colin Watson Tue, 04 Dec 2012 14:53:46 +0000 watershed (6) precise; urgency=low * Pass -l:libnettle.a instead of /usr/lib/libnettle.a in LIB_OBJS; this avoids hardcoding the path which just changed with multiarch; fixes FTBFS. * Bump Standards-Version to 3.9.2. * Set debian/source/format to "3.0 (native)". * Make debian/watershed.initramfs-hook +x in the source; native source package can transport this permission. * Move debian/watershed.initramfs-hook to debian/initramfs-hook/watershed and install it via dh_install instead of calling install in rules. * Convert package from cdbs to dh using debhelper compat level 9 for dpkg-buildflags support. * Override dh_auto_build to pass Q= to make as to see actual build commands. -- Loïc Minier Thu, 01 Dec 2011 00:12:13 +0100 watershed (5) lucid; urgency=low * libnettle-dev is NBS, move build dependency to nettle-dev. * Bump Standards-Version to 3.8.4 (no changes necessary). -- Martin Pitt Mon, 08 Mar 2010 16:39:49 +0100 watershed (4) jaunty; urgency=low * debian/control: Depend on initramfs-tools so system is not potentially rendered unbootable (LP: #358654). -- Kees Cook Thu, 09 Apr 2009 12:32:54 -0700 watershed (3) jaunty; urgency=low * Create default statedir /var/run/watershed in initramfs hook; fixes boot with root on LVM; thanks Albert Damen; LP: #314879. * Update initramfs in postinst's configure if update-initramfs is available. -- Loic Minier Sun, 11 Jan 2009 14:29:52 +0100 watershed (2) jaunty; urgency=low * Install the watershed binary to the initramfs. -- Scott James Remnant Fri, 09 Jan 2009 12:32:39 +0000 watershed (1) jaunty; urgency=low * Initial Release, separated out from udev package. -- Scott James Remnant Fri, 19 Dec 2008 05:40:14 +0000 watershed-7/debian/rules0000755000000000000000000000067012057406646012415 0ustar #!/usr/bin/make -f DEB_BUILD_GNU_TYPE ?= $(shell dpkg-architecture -qDEB_BUILD_GNU_TYPE) DEB_HOST_GNU_TYPE ?= $(shell dpkg-architecture -qDEB_HOST_GNU_TYPE) ifeq ($(DEB_BUILD_GNU_TYPE),$(DEB_HOST_GNU_TYPE)) CROSS := else CROSS := CC=$(DEB_HOST_GNU_TYPE)-gcc LD=$(DEB_HOST_GNU_TYPE)-gcc endif override_dh_auto_build: dh_auto_build -- Q= $(CROSS) override_dh_auto_install: $(MAKE) install-bin DESTDIR=$(CURDIR)/debian/tmp %: dh $@ watershed-7/debian/initramfs-hook/0000755000000000000000000000000012057407202014251 5ustar watershed-7/debian/initramfs-hook/watershed0000755000000000000000000000047012057406532016173 0ustar #!/bin/sh -e # initramfs hook for watershed PREREQ="udev" # Output pre-requisites prereqs() { echo "$PREREQ" } case "$1" in prereqs) prereqs exit 0 ;; esac . /usr/share/initramfs-tools/hook-functions # default statedir mkdir -p ${DESTDIR}/var/run/watershed copy_exec /lib/udev/watershed /lib/udev watershed-7/debian/compat0000644000000000000000000000000212057406532012522 0ustar 9 watershed-7/debian/watershed.postinst0000644000000000000000000000020312057406532015112 0ustar #!/bin/sh set -e if [ "$1" = configure ] && which update-initramfs >/dev/null 2>&1; then update-initramfs -u fi #DEBHELPER# watershed-7/debian/source/0000755000000000000000000000000012057407202012617 5ustar watershed-7/debian/source/format0000644000000000000000000000001512057406532014033 0ustar 3.0 (native) watershed-7/debian/control0000644000000000000000000000150512057406532012730 0ustar Source: watershed Section: admin Priority: extra Maintainer: Scott James Remnant Build-Depends: debhelper (>= 8.9.0~), nettle-dev Standards-Version: 3.9.2 Vcs-Bzr: http://bazaar.launchpad.net/~ubuntu-core-dev/watershed/ubuntu Package: watershed Architecture: any Depends: ${shlibs:Depends}, ${misc:Depends}, initramfs-tools Enhances: udev Recommends: udev Replaces: udev (<< 135-1) Description: reduce superfluous executions of idempotent command watershed may be run around a command such that any further attempts to run the command while another copy is running will only result in one initial further attempt. Package: watershed-udeb XC-Package-Type: udeb Section: debian-installer Architecture: any Depends: ${shlibs:Depends}, ${misc:Depends} Description: reduce superfluous executions of idempotent command watershed-7/debian/watershed-udeb.install0000644000000000000000000000002312057406532015612 0ustar lib/udev/watershed watershed-7/debian/dirs0000644000000000000000000000001112057406532012200 0ustar lib/udev watershed-7/debian/copyright0000644000000000000000000000157712057406532013271 0ustar watershed is Copyright 2007 Canonical Ltd License: This package 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 of the License, or (at your option) any later version. This package 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 package; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA On Debian systems, the complete text of the GNU General Public License can be found in `/usr/share/common-licenses/GPL'. watershed-7/debian/watershed.install0000644000000000000000000000012312057406532014676 0ustar debian/initramfs-hook/watershed usr/share/initramfs-tools/hooks lib/udev/watershed