Net-OpenSSH-0.60/0000755000175000017500000000000012107432777012452 5ustar salvasalvaNet-OpenSSH-0.60/META.yml0000664000175000017500000000101012107432777013715 0ustar salvasalva--- abstract: 'Perl SSH client package implemented on top of OpenSSH' author: - 'Salvador Fandino ' build_requires: ExtUtils::MakeMaker: 0 configure_requires: ExtUtils::MakeMaker: 0 dynamic_config: 1 generated_by: 'ExtUtils::MakeMaker version 6.62, CPAN::Meta::Converter version 2.112150' license: unknown meta-spec: url: http://module-build.sourceforge.net/META-spec-v1.4.html version: 1.4 name: Net-OpenSSH no_index: directory: - t - inc requires: Test::More: 0 version: 0.60 Net-OpenSSH-0.60/META.json0000664000175000017500000000160412107432777014076 0ustar salvasalva{ "abstract" : "Perl SSH client package implemented on top of OpenSSH", "author" : [ "Salvador Fandino " ], "dynamic_config" : 1, "generated_by" : "ExtUtils::MakeMaker version 6.62, CPAN::Meta::Converter version 2.112150", "license" : [ "unknown" ], "meta-spec" : { "url" : "http://search.cpan.org/perldoc?CPAN::Meta::Spec", "version" : "2" }, "name" : "Net-OpenSSH", "no_index" : { "directory" : [ "t", "inc" ] }, "prereqs" : { "build" : { "requires" : { "ExtUtils::MakeMaker" : 0 } }, "configure" : { "requires" : { "ExtUtils::MakeMaker" : 0 } }, "runtime" : { "requires" : { "Test::More" : 0 } } }, "release_status" : "stable", "version" : "0.60" } Net-OpenSSH-0.60/Changes0000644000175000017500000004255412107432674013753 0ustar salvasalvaRevision history for Perl extension Net::OpenSSH. 0.60 Feb 15, 2013 - scp_put and rsync_put where not handling correctly the case where glob was set but the given file patterns didn't match any local file (bug report by Pavel Leity). - $SIG{__DIE__} was not always localized before calling eval 0.59 Jan 31, 2013 - release as stable - fix some misspellings 0.58_04 May 2, 2012 - solve some git merge mistakes 0.58_03 May 1, 2012 - several misspellings corrected on the docs (bug report by Florian Schlichting from Debian - I love these guys!) - don't put square brackets around IPv6 addreses when passing the hostname to ssh (bug report by Alexey ?) 0.58_02 Apr 16, 2012 - strict_mode lets pass world-writable directories if they have the restricted deletion flag set - implement sshfs import and export methods - add forward_agent feature - do not disable ssh-agent when using password authentication - some documentation improvements 0.58_01 Jan 30, 2012 - add new documentation section about debugging - new helper module Net::OpenSSH::OSTracer added - ConnectionCache module was missing from MANIFEST - correction on default_ssh_opts feature documentation (reported by Yann Kerhervé) 0.57 Dec 21, 2011 - quote equal sign - do not quote commas 0.56_01 Dec 8, 2011 - rsync methods were failing when user was defined (bug report by black_fire) - detect when the destructor is being called from a different thread (bug report by troy99 at PerlMonks) - support for Net::OpenSSH::Gateway added 0.55 Dec 6, 2011 - solve regression from 0.53_03: rsync methods were broken because the hostname was not being correctly removed from the ssh command passed to rsync (bug report by Mithun Ayachit) 0.54 Dec 4, 2011 - release as stable 0.53_05 Nov 23, 2011 - scp methods were broken when a user was given (bug report by Andrew J. Slezak) - add support for verbose option in scp methods - implement parse_connections_opts - solve bug related to expansion of HOST var when an IPv6 address was given - move FACTORY docs to the right place - add FAQ about running remote commands via sudo - add sample for Net::Telnet integration - add sample for sudo usage reading password from DATA 0.53_04 Sep 2, 2011 - add default_ssh_opts feature - getpwuid may fail, check $home is defined before using it - add FAQ entry about MaxSessions limit reached - move FACTORY docs to the right place 0.53_03 Aug 18, 2011 - handling of default_std*_file was broken (bug report and patch by Nic Sandfield) - keep errors from opening default slave streams - add Net::OpenSSH::ConnectionCache package - add FACTORY hook - place '--' in ssh command after host name - add support for die_on_error - add support for batch_mode feature - typo in sample code corrected (reported by Fernando Sierra) - using { stdin_data => [] } was generating warnings 0.53_02 Jul 12, 2011 - add support for custom login handlers - remove SIG{__WARN__} localizations 0.53_01 May 15, 2011 - quoter and glob_quoter fully rewritten from scratch - quoter was not handling "\n" correctly (bug report and work around by Skeeve) - minor doc improvements 0.52 May 9, 2011 - release as stable - skip bad passwd test when IO::Pty is not available 0.51_12 May 2, 2011 - require version 2 of the SSH protocol (bug report by Jo Rhett) - remove harmless "my $foo = ... if ..." bug 0.51_11 Apr 24, 2011 - encoding handling in sftp method was broken (bug report and solution by Todd Rinaldo) - sftp method was broken (regression) - better support for sharing SSH connections with children - more tests - add sample for usage with Net::Telnet - bad sample in documentation corrected 0.51_10 Mar 29, 2011 - error status was not reset between calls (regression) - remove internal line numbers from error messages - encoding errors were not propageted in pipe_in and pipe_out methods - minor debuging cleanup - better messages on bad encoding errors 0.51_09 Mar 29, 2011 - add support for passphrase protected keys - add support for passing the private key path as an explicit constructor option - bug solved on password handling - bug solved in _fileno_dup_over - remove redundant _check_master_and_clear_error - more tests - some doc improvements 0.51_08 Mar 28, 2011 - pipe_in and pipe_out were not correctly setting error status on failure - support argument_encoding in pipe_in and pipe_out - document how to set StrictHostKeyChecking=no - replace @error_prefix arguments by a localized stack - use _load_module for Encode loading - remove no-encoding hack on _master_ctl 0.51_07 Mar 22, 2011 - add encoding support - undef $SIG{CHLD} inside blocking methods 0.51_06 Mar 16, 2011 - make hostname argument to constructor optional when external_master is set - better error handling in constructor - s/reuse_master/external_master/. I never were happy with the old option name. - some minor doc corrections 0.51_05 Mar 15, 2011 - implement reuse_master feature - do not propagate extra arguments from wait_for_master to _wait_for_master - accept ssh_opts in make_remote_command 0.51_04 Mar 10, 2011 - solve "Not enough arguments for grep" bug (reported by Tom Wittbrodt) - some documentation improvements 0.51_03 Mar 9, 2011 - error message corrected - troubleshooting guide improved - add pointer to OpenSSH Wikibook - add autosudo.pl sample - implement stdintout_dpipe_is_parent feature 0.51_02 Feb 10, 2011 >>>>>>> master - add support for test method - add support for dpipe feature - simplify _wait_for_master code - remove spurious warnings generated when control command failed to run (bug report by jaiieq from Perlmonks) - timeout at object level where being ignored by _waitpid - document how to run detached remote processes 0.51_01 Feb 1, 2011 - add support for kill_ssh_on_timeout feature and better timeout handling - set ssh option ServerAliveInterval - system could return -1 on error instead of false - add change_password.pl sample - some tests were failing when using csh as the remote shell (bug report by Scott Davis) 0.50 Nov 21, 2010 - shell_quote in t/1_run.t was escaping '_' (bug report by Andreas J. König) - some typos corrected - initial implementation of scp_cat 0.49 Aug 7, 2010 - do not kill master from forked processes (bug report by scotchie at PerlMonks) 0.48 Aug 2, 2010 - bug quoting escaped scalars as globs solved - new faq for "can't change directory" - support calling shell_quote and shell_quote_args as class methods - more tests - minor doc corrections 0.47 Apr 13, 2010 - document how to make it work under Solaris - some docs reorganization and improvements 0.46_02 Mar 29, 2010 - add suport for default_stdin_file, default_stdin_discard and similar options - add stdinout_socket feature and open2socket shortcut method - rename some internal methods to more meaningfull names - add open_tunnel and capture_tunnel methods - add support for tunnel feature and docs - document mod_perl/mod_perl2 integration - document not-a-real-file-handle errors - some minor doc updates - run tests with StrictHostKeyChecking=no - disable tty allocation for control commands - better debugging for _io3 0.46_01 Mar 25, 2010 - do not depend on STDIN, STDOUT and STDERR being file descriptors 0, 1, and 2 respectively as it happens, for instance, under mod_perl (bug report by eserte via PerlMonks) - use POSIX::dup2 to duplicate file descriptors, instead of perl open builtin - set stdin_discard when running control commands as it may be closed or tied - better debugging for waitpid and _io3 - error in example in documentation corrected (reported by Slaven Rezic) 0.45 Feb 17, 2010 - support for taint mode - use better IPv6 regexp - bug in glob_quoter incorrectly handling empty strings solved - document how $SIG{CHLD} can break some methods and add FAQ - some typos corrected - update copyright notices 0.44 Jan 26, 2010 - solve bug on rsync methods not correctly handling pass-through options carrying an argument (bug report by Daiju Kito) - support several verbose levels in rsync methods - document spurious warnings that appear when tty => 1 is given and stdin is not attached to a tty 0.43 Dec 14, 2009 - call ssh with -tt instead of -t to force remote tty allocation even when stdin is not attached to one locally (bug report by Todd E. Rinaldo) 0.42 Dec 5, 2009 - add FAQ section - add commercial support offering - add pointer to my wishlist :-) 0.41_03 Nov 16, 2009 - add testing known_hosts to MANIFEST - some bits where missing from 0.40 - allow also keyboard-interactive authentication when password is given (bug report by Todd E. Rinaldo) 0.40 Nov 14, 2009 - DESTROY was clobbering $@ (bug report by Todd E. Rinaldo) - when password authentication is requested add flags to ssh master command to disable other auth. options - document how to integrate Net::OpenSSH with Expect 0.39 Oct 10, 2009 - use SIGTERM instead of SIGHUP to kill lazy SSH master - on 1_run.t remote commands could be aliased bug (report and patch by Danijel Tasov) - add methods for external master PID handling - add 'all' tag to Net::OpenSSH::Constants - check SSH client version from Makefile.PL - work around L links in POD being rendered as "the Foo::Bar manpage" by some POD backends. 0.38 Sep 25, 2009 - remove alpha-status warning from docs! - add debug support to master killing - DESTROY was generating warnings when called before the master connection had been established successfully - add variable expansion feature - minor doc corrections 0.37 Sep 15, 2009 - add support for stdout_file, stderr_file and stdin_file options 0.36 Jul 8, 2009 - open2pty, open3 and open3pty where not handling transparent options for open_ex, and other minor bugs - pty handling in open_ex was broken - expect sample added 0.35 Jun 30, 2009 - strict_mode was not working (bug report by wardmw@perlmonks) - documentation correction (error reported by Kevin Mulholland) - Document that the SSH client bundled with your operative system may not be good enough (report by Arun Rajamari). - Add pointer to SSH::Batch in the docs 0.34 Mar 26, 2009 - pipe_out was broken (bug report by Matthew Merhar) 0.33 Mar 24, 2009 - password obfuscation was failing on '%' (bug report by Sawyer X) 0.32 Mar 18, 2009 - async mode was not working in constructor (bug report by Niels Larsen) 0.31 Mar 3, 2009 - password authentication was not working on OS/X (bug report by Niels Larsen) - module loader was generating warnings on development versions (bug report by Todd E. Rinaldo) 0.30 Feb 13, 2009 - make sftp open_ex based and add support for stderr_fh and stderr_discard - croak on unaceptable sftp options - delete SSH_ASKPASS and SSH_AUTH_SOCK from env. when password authentication is requested 0.29 Feb 12, 2009 - sftp method was broken, regression introduced on 0.11 (bug report by Todd E. Rinaldo) 0.28 Feb 11, 2009 - scp methods were broken, regression introduced on 0.24 (bug report by Ryan Schumacher) - doc chapter about 3rd party module integration 0.27 Feb 5, 2009 - better tty feature handling in open_ex, now it defaults to ssh default behaviour - support for \ and \\ quoting escapes added - minor doc corrections - document ssh_opts (bug report by Graham Knop) 0.26 Feb 3, 2009 - docs reorganized and simplified - new std(in|out|err)_discard options added - new master_std(out|err)_(fh|discard) options added (feature request by Michael Courtney) - async support in system 0.25 Feb 2, 2009 - remove obsolete FAQ 0.24 Feb 2, 2009 WARNING!!! backward incompatible changes in this release: =============================================================== - system method now returns true on success and undef otherwise - errors OSSH_SLAVE_SCP_FAILED and OSSH_SLAVE_RSYNC_FAILED replaced by generic OSSH_SLAVE_CMD_FAILED - multiplexing_socket_path method renamed to get_ctl_path =============================================================== - new make_remote_command method - troubleshooting guide added - ask for help in Perlmonks! - check multiplexing socket before any command - more robust waitpid used - detect old OpenSSH versions of ssh (bug report and patch by David Markham) 0.23 Jan 25, 2009 - don't quote ~ when globing (bug report by Niels Larsen) - IPv6 addresses are not required inside brackets (feature request by Ryan Kruse) - better IPv6 regexp from Regexp::IPv6 - some doc corrections 0.22 Jan 22, 2009 - use better regexp for IPv6 addresses 0.21 Jan 22, 2009 - recognize IPv6 addresses (bug report by Ryan Kruse) 0.20 Jan 22, 2009 - default_stderr_fh was wrongly handled (bug report by Sawyer X). - add getters for user, host and port properties (feature request by Niels Larsen) - doc errors corrected 0.19 Jan 20, 2009 - shell_quote_glob method added - rsync has its own quoting rules (bug report by Niels Larsen) - implement copy_attrs feature for rsync methods (bug report by Niels Larsen) 0.18 Jan 20, 2009 - several documentation corrections and improvements contributed by Niels Larsen. - add support for open_ex stdout_fh, stderr_fh and stderr_to_stdout options to rsync methods (bug report by Niels Larsen) - example of asynchronous usage of scp added 0.17 Jan 19, 2009 - localize $SIG{__DIE__}, $SIG{__WARN__} and $@ for evals (bug report by Niels Larsen) - quote empty arguments correctly - add support for new constructor options default_std(in|out|err)_fh - some doc improvements 0.16 Jan 11, 2009 - add support for bwlimit, copy_attrs, stderr_fh, stdout_fh and stderr_to_stdout to scp methods - correct bug in option checking for spawn and open2 0.15 Jan 9, 2009 - do not escape dots when quoting args - some shell quoting tests added - better glob quoting - informative rsync error messages - doc improvements and typos 0.14 Jan 9, 2009 - add experimental support for rsync file transfers - rework scp implementation in order to share as much as possible with rsync methods 0.13 Jan 8, 2009 - when globing in scp_get, quote spaces only - add quote_spaces_only feature to _quote_args method - some scp_put and scp_get problems solved (bug report and patch by Maxim Yemelyanov). - _quote_args was returning wrong result in scalar context (bug report and solution also by Maxim Yemelyanov). - set umask when creating ctl_dir (bug report by Maxim Yemelyanov). 0.12 Jan 7, 2009 - support timeout option on capture methods (bug report by Pete Emerson). - remove broken perl 5.6.x workarounds 0.11 Dec 24, 2008 - new shell_quote method - add scp_get and scp_put methods - add spawn method - add support for ssh_opts in several methods - _make_call_ex renamed to _make_call - _make_call removed - fix doc errors 0.10 Dec 17, 2008 - require OpenSSH > 4.7 for alternative testing aproach - use correct ps args when testing on Solaris - new mux_socket_path method - more tests 0.09 Dec 10, 2008 - fallback testing method when ssh'ing to localhost is not enabled - add support for master_opts constructor argument 0.08 Dec 10, 2008 - require 5.8.x and remove compatibility hacks for older versions - solve bug in open_ex when pty is requested - perform sanity checks on child file handles on open_ex 0.07 Dec 9, 2008 - remove >>& incompatibility for perl 5.6.x - in tests, sort "ls" output, as it seems that it can change between two consecutive runs in some OSs 0.06 Dec 3, 2008 - open_ex API redesigned - better bad options handling - support for async connections - shell metacharacter quoting - improved debugging - improved documentation 0.01 Fri Nov 14 01:02:40 2008 - original version; created by h2xs 1.23 with options -AXn Net::OpenSSH Net-OpenSSH-0.60/MANIFEST0000644000175000017500000000115612107432777013606 0ustar salvasalvaChanges Makefile.PL MANIFEST README t/1_run.t t/2_pods.t lib/Net/OpenSSH.pm lib/Net/OpenSSH/Constants.pm lib/Net/OpenSSH/ConnectionCache.pm lib/Net/OpenSSH/OSTracer.pm t/common.pm t/test_server_key t/test_server_key.pub t/test_user_key t/test_user_key.pub t/known_hosts sample/expect.pl sample/change_passwd.pl sample/autosudo.pl sample/net-telnet.pl sample/login_handler.pl sample/mod_perl_openssh.pm sample/keep_in_sync.pl sample/password_from_data.pl META.yml Module YAML meta-data (added by MakeMaker) META.json Module JSON meta-data (added by MakeMaker) Net-OpenSSH-0.60/sample/0000755000175000017500000000000012107432777013733 5ustar salvasalvaNet-OpenSSH-0.60/sample/password_from_data.pl0000644000175000017500000000044611721153767020152 0ustar salvasalva#!/usr/bin/perl use strict; use warnings; use Net::OpenSSH; @ARGV >= 2 or die "Usage:\n $0 host cmd [arg1 [arg2 [...]]]\n\n"; my ($host, @cmd) = @ARGV; my $ssh = Net::OpenSSH->new($host); $ssh->system({stdin_fh => \*DATA}, sudo => -kSp => '', '--', @cmd); __DATA__ my-remote-password Net-OpenSSH-0.60/sample/mod_perl_openssh.pm0000644000175000017500000000146311540354655017633 0ustar salvasalvapackage mod_perl_openssh; use strict; use warnings; use Apache2::Const qw(OK); use Apache2::RequestRec; use Apache2::RequestUtil; use Net::OpenSSH; $Net::OpenSSH::debug = -1; use constant SSH_HOST => 'localhost'; sub handler ($$) { my($class, $r) = @_; open my $stdin, '<', '/dev/null' or die "unable to open /dev/null"; my $ssh = Net::OpenSSH->new(SSH_HOST, default_stdin_fh => $stdin, # master_opts => ["-vvv"] ); die $ssh->error if $ssh->error; my $date = $ssh->capture({stderr_file => '/dev/null'}, "date"); warn "error: " . $ssh->error .", date: $date"; $r->content_type("text/plain"); print("hello, the date at " . $ssh->get_host . " is $date\n"); OK; } 1; __END__ Net-OpenSSH-0.60/sample/autosudo.pl0000644000175000017500000000157711721153767016145 0ustar salvasalva#!/usr/bin/perl # see http://perlmonks.org/?node_id=890441 use strict; use warnings; use Net::OpenSSH; use Expect; @ARGV == 3 or die <new($host, passwd => $pass1); $ssh->error and die "unable to connect to remote host: " . $ssh->error; $ssh->system("sudo -K"); my ( $pty, $pid ) = $ssh->open2pty({stderr_to_stdout => 1}, 'sudo', -p => 'configtest:', 'bash', '-i') or return "failed to attempt sudo bash: $!\n"; my $expect = Expect->init($pty); $expect->expect(2, [ qr/configtest:/ => sub { shift->send("$pass2\n"); exp_continue;} ], [ qr/Sorry/ => sub { die "Login failed" } ], [ qr/.*#\s+/ => sub { print shift->match }] ) or die "Timeout!"; $expect->interact(); Net-OpenSSH-0.60/sample/expect.pl0000644000175000017500000000212711540354655015560 0ustar salvasalva#!/usr/bin/perl use strict; use warnings; use Net::OpenSSH; use Expect; select STDOUT; $| = 1; select STDERR; $| = 1; my $password = $ARGV[0]; my $timeout = 20; my $debug = 0; my $ssh = Net::OpenSSH->new('test@127.0.0.1', password => $password); # my ($pty, $pid) = $ssh->open2pty("sudo cat /etc/shadow") # After a successful sudo operation, it doesn't request the password # again until some time after, handling this undeterministic behaviour # is a pain in the ass, so we just clear any cached credentials # calling "sudo -k" first as follows: my ($pty, $pid) = $ssh->open2pty("sudo -k; sudo cat /etc/shadow") or die "open2pty failed: " . $ssh->error . "\n"; my $expect = Expect->init($pty); $expect->raw_pty(1); $debug and $expect->log_user(1); $debug and print "waiting for password prompt\n"; $expect->expect($timeout, ':') or die "expect failed\n"; $debug and print "prompt seen\n"; $expect->send("$password\n"); $debug and print "password sent\n"; $expect->expect($timeout, "\n") or die "bad password\n"; $debug and print "password ok\n"; while(<$pty>) { print "$. $_" } Net-OpenSSH-0.60/sample/change_passwd.pl0000644000175000017500000000204411540354655017074 0ustar salvasalva#!/usr/bin/perl use strict; use warnings; use Net::OpenSSH; use Expect; select STDOUT; $| = 1; select STDERR; $| = 1; @ARGV == 3 or die <new($host, password => $old); my ($pty, $pid) = $ssh->open2pty("passwd") or die "open2pty failed: " . $ssh->error . "\n"; my $expect = Expect->init($pty); $expect->raw_pty(1); $debug and $expect->log_user(1); sub answer_passwd { my ($pattern, $pass) = @_; $debug and print "waiting for password prompt\n"; $expect->expect($timeout, -re => $pattern) or die "expect failed\n"; $debug and print "prompt seen\n"; $expect->send("$pass\n"); $debug and print "password sent\n"; $expect->expect($timeout, "\n") or die "bad password\n"; } answer_passwd('current.*:', $old); answer_passwd('new.*:', $new); answer_passwd('new.*:', $new); $expect->expect($timeout, "success") or die "Failed!\n"; print "password updated\n"; Net-OpenSSH-0.60/sample/keep_in_sync.pl0000644000175000017500000000163111721153767016737 0ustar salvasalva#!/usr/bin/perl use strict; use warnings; # This script monitorizes a directory using inotify and when some # change is detected, uses rsync to update a remote copy. # # See: http://stackoverflow.com/q/6781104/124951 use Net::OpenSSH; use Linux::Inotify2; use Time::HiRes qw(sleep); my $usage = "Usage:\n $0 local_dir [user\@]host remote_dir\n\n"; @ARGV == 3 or die $usage; my ($local, $host, $remote) = @ARGV; -d $local or die $usage; my $ssh = Net::OpenSSH->new($host); $ssh->error and die "unable to connect to remote host: " . $ssh->error; my $inotify = Linux::Inotify2->new; $inotify->watch ($local, IN_MODIFY|IN_MOVED_TO); $ssh->rsync_put({verbose => 1, glob => 1}, "$local/*", $remote); while (1) { my @events = $inotify->read or die "read error: $!"; my %changed; $changed{"$local/$_->{name}"} = 1 for @events; $ssh->rsync_put({verbose => 1}, keys %changed, $remote); sleep 0.1; } Net-OpenSSH-0.60/sample/net-telnet.pl0000644000175000017500000000052311721153767016347 0ustar salvasalva#!/usr/bin/perl use strict; use warnings; use Net::OpenSSH; use Net::Telnet; $Net::OpenSSH::debug = -1; my $ssh = Net::OpenSSH->new('localhost'); my ($fh, $pid) = $ssh->open2pty(); my $conn = Net::Telnet->new(Fhopen => $fh); my @lines = $conn->cmd("find /tmp"); print @lines; my @lines1 = $conn->cmd("ls"); print "\n\nls:\n", @lines1; Net-OpenSSH-0.60/sample/login_handler.pl0000644000175000017500000000165311721153767017102 0ustar salvasalva#!/usr/bin/perl # This script contains a rude implementation of a custom login handler # for password authentication. use strict; use warnings; use Net::OpenSSH; my ($host, $user, $passwd) = @ARGV; sub mi_login_handler { my ($ssh, $pty, $data) = @_; # print "custom login handler called!"; my $read = sysread($pty, $$data, 1024, length $$data); if ($read) { # print "buffer: >$$data<\n"; if ($$data =~ s/.*://s) { print $pty "$passwd\n"; return 1; } } return 0; } my $ssh = Net::OpenSSH->new($host, user => $user, master_opts => [-o => 'NumberOfPasswordPrompts=1', -o => 'PreferredAuthentications=keyboard-interactive,password'], login_handler => \&mi_login_handler); $ssh->error and die "Unable to connect to remote machine" . $ssh->error; $ssh->system("ls"); Net-OpenSSH-0.60/t/0000755000175000017500000000000012107432777012715 5ustar salvasalvaNet-OpenSSH-0.60/t/common.pm0000644000175000017500000000113111540354655014535 0ustar salvasalvause strict; use warnings; use File::Spec; sub sshd_cmd { my $sc_name = 'sshd'; my @paths = qw( /usr /usr/local /usr/local/openssh /opt/ssh /opt/openssh ); @paths = map { ("$_/sbin/sshd", "$_/bin/sshd") } @paths; for my $sshd (@paths) { return $sshd if -x $sshd; } } sub find_cmd { my @path = qw(/usr/bin /bin /usr/local/bin /usr/sbin /sbin /opt/bin ); for my $cmd (@_) { for my $path (@path) { my $r = "$path/$cmd"; return $r if -x $r; } } undef; } 1; Net-OpenSSH-0.60/t/1_run.t0000644000175000017500000001606611721153767014137 0ustar salvasalva#!/usr/bin/perl use strict; use warnings; use Cwd; use File::Spec; use Test::More; use lib "./t"; use common; use Net::OpenSSH; use Net::OpenSSH::Constants qw(OSSH_ENCODING_ERROR OSSH_MASTER_FAILED); my $timeout = 15; my $fallback; my $PS = find_cmd 'ps'; defined $PS or plan skip_all => "ps command not found"; my $LS = find_cmd('ls'); defined $LS or plan skip_all => "ls command not found"; my $CAT = find_cmd('cat'); defined $CAT or plan skip_all => "cat command not found"; my $ECHO = find_cmd('echo'); defined $ECHO or plan skip_all => "echo command not found"; my $PS_P = ($^O =~ /sunos|solaris/i ? "$PS -p" : "$PS p"); # $Net::OpenSSH::debug = -1; my $V = `ssh -V 2>&1`; my ($ver, $num) = $V =~ /^(OpenSSH_(\d+\.\d+).*)$/msi; plan skip_all => 'OpenSSH 4.1 or later required' unless (defined $num and $num >= 4.1); chomp $ver; diag "\nSSH client found: $ver.\nTrying to connect to localhost, timeout is ${timeout}s.\n"; my %ctor_opts = (host => 'localhost', timeout => $timeout, strict_mode => 0, master_opts => [-o => "StrictHostKeyChecking no"]); my $ssh = Net::OpenSSH->new(%ctor_opts); # fallback if ($ssh->error and $num > 4.7) { diag "Connection failed... trying fallback aproach"; my $sshd_cmd = sshd_cmd; if (defined $sshd_cmd) { my $here = File::Spec->rel2abs("t"); diag join("\n", "sshd command found at $sshd_cmd.", "Faking connection, timeout is ${timeout}s.", "Using configuration from '$here'", ""); chmod 0600, "$here/test_user_key", "$here/test_server_key";; my @sshd_cmd = ($sshd_cmd, '-i', -h => "$here/test_server_key", -o => "AuthorizedKeysFile $here/test_user_key.pub", -o => "StrictModes no", -o => "PasswordAuthentication no", -o => "PermitRootLogin yes"); s/(\W)/\\$1/g for @sshd_cmd; $ssh = Net::OpenSSH->new(%ctor_opts, master_opts => [-o => "ProxyCommand @sshd_cmd", -o => "StrictHostKeyChecking no", -o => "NoHostAuthenticationForLocalhost yes", -o => "UserKnownHostsFile $here/known_hosts", -o => "GlobalKnownHostsFile $here/known_hosts"], key_path => "$here/test_user_key"); $fallback = 1; } else { diag "sshd command not found!" } } plan skip_all => 'Unable to establish SSH connection to localhost!' if $ssh->error; plan tests => 46; sub shell_quote { my $txt = shift; $txt =~ s|([^\w+\-\./])|\\$1|g; $txt } my $muxs = $ssh->get_ctl_path; ok(-S $muxs, "mux socket exists"); is((stat $muxs)[2] & 0777, 0600, "mux socket permissions"); my $cwd = cwd; my $sq_cwd = shell_quote $cwd; my $rshell = $ssh->capture($ECHO => '$SHELL'); my $rshell_is_csh = ($rshell =~ /\bcsh$/); my @ls_good= sort `$LS $sq_cwd`; my @ls = sort $ssh->capture({stderr_to_stdout => 1}, "$LS $sq_cwd"); is("@ls", "@ls_good"); my @lines = map "foo $_\n", 1..10; my $lines = join('', @lines); my ($in, $pid) = $ssh->pipe_in("$CAT > $sq_cwd/test.dat"); ok($ssh->error == 0); ok($in); ok(defined $pid); print $in $_ for @lines; my @ps = `$PS_P $pid`; ok(grep(/ssh/i, @ps)); ok(close $in); @ps = `$PS_P $pid`; ok(!grep(/ssh/i, @ps)); ok(-f "$cwd/test.dat"); my ($output, $errput) = $ssh->capture2("$CAT $sq_cwd/test.dat"); is($errput, '', "errput"); is($output, $lines, "output") or diag $output; { my $ssh2 = Net::OpenSSH->new(external_master => 1, ctl_path => $ssh->get_ctl_path); my ($output, $errput) = $ssh2->capture2("$CAT $sq_cwd/test.dat"); is($errput, '', "external_master 1"); is($output, $lines, "external_master 2") or diag $output; # DESTROY $ssh2 } ok($ssh->check_master, "check_master") or diag "error: ", $ssh->error; $ssh->system({stdout_file => ['>', "$sq_cwd/test.dat.deleteme"], stderr_discard => 1 }, "$CAT $sq_cwd/test.dat"); is ($ssh->error, 0, "system ok"); $output = $ssh->capture("$CAT $sq_cwd/test.dat.deleteme"); is ($ssh->error, 0, "system ok") or diag "error: ", $ssh->error; is ($output, $lines, "redirection works"); unlink "$sq_cwd/test.dat.deleteme"; $output = $ssh->capture(cd => $sq_cwd, \\'&&', $CAT => 'test.dat'); is ($output, $lines) or diag "error: ", $ssh->error; $output = $ssh->capture({stdin_data => \@lines}, $CAT); is ($output, $lines); SKIP: { skip "remote shell is csh", 3 if $rshell_is_csh; $output = $ssh->capture({stdin_data => \@lines, stderr_to_stdout => 1}, "$CAT >&2"); is ($output, $lines); ($output, $errput) = $ssh->capture2("$CAT $sq_cwd/test.dat 1>&2"); is ($errput, $lines); is ($output, ''); } my $fh = $ssh->pipe_out("$CAT $sq_cwd/test.dat"); ok($fh, "pipe_out"); $output = join('', <$fh>); is($output, $lines, "pipe_out lines"); my $string = q(#@$#$%&(@#_)erkljgfd'' 345345' { { / // ///foo); $output = $ssh->capture(echo => $string); chomp $output; is ($output, $string, "quote_args"); $string .= "\nline1\nline2"; $output = $ssh->capture(echo => $string); chomp $output; is ($output, $string, "quote_args with new lines"); eval { $ssh->capture({foo => 1}, 'bar') }; ok($@ =~ /option/ and $@ =~ /foo/); is ($ssh->shell_quote('/foo/'), '/foo/'); is ($ssh->shell_quote('./foo*/bar&biz;'), "'./foo*/bar&biz;'"); is (Net::OpenSSH->shell_quote('./foo*/bar&biz;'), "'./foo*/bar&biz;'"); is ($ssh->_quote_args({quote_args => 1, glob_quoting => 1}, './foo*/bar&biz;'), "./foo*/bar'&biz;'"); is ($ssh->shell_quote_glob('./foo*/bar&biz;'), "./foo*/bar'&biz;'"); is (Net::OpenSSH->shell_quote_glob('./foo*/bar&biz;'), "./foo*/bar'&biz;'"); $ssh->set_expand_vars(1); $ssh->set_var(FOO => 'Bar'); is ($ssh->shell_quote(\\'foo%FOO%foo%%foo'), 'fooBarfoo%foo'); is ($ssh->shell_quote('foo%FOO%foo%%foo'), "'fooBarfoo\%foo'"); $ssh->set_expand_vars(0); is ($ssh->shell_quote(\\'foo%FOO%foo%%foo'), 'foo%FOO%foo%%foo'); is (Net::OpenSSH->shell_quote(\\'foo%FOO%foo%%foo'), 'foo%FOO%foo%%foo'); my $enne = "letra e\xf1e"; $ssh->capture({encoding => 'ascii'}, $ECHO => $enne); is ($ssh->error+0, OSSH_ENCODING_ERROR, "bad encoding"); $ssh->wait_for_master; is ($ssh->error, 0, "wait_for_master resets error"); $ssh->capture({encoding => 'ascii'}, $ECHO => $enne); is ($ssh->error+0, OSSH_ENCODING_ERROR, "bad encoding"); my $captured_enne = $ssh->capture({encoding => 'latin1'}, $ECHO => $enne); chomp $captured_enne; is ($ssh->error+0, 0, "good encoding"); is ($captured_enne, $enne, "capture and encoding"); my $rcmd = $ssh->make_remote_command($ECHO => 'hello'); my $pipe_out = readpipe $rcmd; chomp $pipe_out; is ($pipe_out, 'hello', 'make_remote_command'); eval { my $ssh3 = $ssh; undef $ssh; die "some text"; }; like($@, qr/^some text/, 'DESTROY should not clobber $@'); SKIP: { skip "no login with default key", 1 if $fallback; my $ssh4; for my $passwd (qw(foo bar)) { $ssh4 = eval { Net::OpenSSH->new(%ctor_opts, passwd => $passwd, master_stderr_discard => 1) }; $@ and $@ =~ /IO::Pty/ and skip "no IO::Pty", 1; last if $ssh4->error; } is ($ssh4->error+0, OSSH_MASTER_FAILED, "bad password"); } Net-OpenSSH-0.60/t/test_user_key0000644000175000017500000000124011540354655015520 0ustar salvasalva-----BEGIN DSA PRIVATE KEY----- MIIBvAIBAAKBgQDc6cTc1LgDorqq9svyYwJXShjgZ84iBCbJz71a5cK6gjwSYxCg EvWHzp2NrxVux2XpiPeqF7DCSwW/O74pdVKpYG3Eql/ngohKvJx/YW8QyM+TQKCS Bf+QojyBuS3fbT1JmTzo3pYC1Ev6okViAvxinPxNYFbSfzh2lwGbiurc8QIVAJID Xn9MHX+/saXqFC4F9WYUcCg1AoGBALTDDqS+qM6hhVWQmdxQSZA+JkP8Xs5KDaT8 9N1zZtzj9eUT9Hldv2zJsfVZgv3ZGNKhm3W2WhISLRBC+mNiEMJCbUv/Gzdomast R6OhSAeGcSYzwijZwudlxgUr/E+BTfbJDPB025jSWhCB9bivjF7oe4MaAWJy6ZDp PPpdxMVwAoGAGchZjWis/buTlH7QMyDEgsIjKHEvn2qC49cpW7L0fzgOj9vYMbYG LRqMfmraYbvTRLukD1cJmmFbqkSHlQYWcF28ddyf4w8nUQ9T4IX2/aVo6xdlx6l9 yp5BV+gczfITpNOOLqK01ir2C1SGj8sw/w6FkUWEbupSVd4Wrn5PLc4CFQCAnD/+ qldMd3HqFCcV4KZwIEBr3Q== -----END DSA PRIVATE KEY----- Net-OpenSSH-0.60/t/2_pods.t0000644000175000017500000000047211540354655014271 0ustar salvasalva#!/usr/bin/perl use strict; use Test::More; plan skip_all => "Only the author needs to check that POD docs are right" unless eval "no warnings; getlogin eq 'salva'"; eval "use Test::Pod 1.00"; plan skip_all => "Test::Pod 1.00 required for testing POD" if $@; all_pod_files_ok( all_pod_files( qw(blib) ) ); Net-OpenSSH-0.60/t/test_user_key.pub0000644000175000017500000000113211540354655016305 0ustar salvasalvassh-dss AAAAB3NzaC1kc3MAAACBANzpxNzUuAOiuqr2y/JjAldKGOBnziIEJsnPvVrlwrqCPBJjEKAS9YfOnY2vFW7HZemI96oXsMJLBb87vil1UqlgbcSqX+eCiEq8nH9hbxDIz5NAoJIF/5CiPIG5Ld9tPUmZPOjelgLUS/qiRWIC/GKc/E1gVtJ/OHaXAZuK6tzxAAAAFQCSA15/TB1/v7Gl6hQuBfVmFHAoNQAAAIEAtMMOpL6ozqGFVZCZ3FBJkD4mQ/xezkoNpPz03XNm3OP15RP0eV2/bMmx9VmC/dkY0qGbdbZaEhItEEL6Y2IQwkJtS/8bN2iZqy1Ho6FIB4ZxJjPCKNnC52XGBSv8T4FN9skM8HTbmNJaEIH1uK+MXuh7gxoBYnLpkOk8+l3ExXAAAACAGchZjWis/buTlH7QMyDEgsIjKHEvn2qC49cpW7L0fzgOj9vYMbYGLRqMfmraYbvTRLukD1cJmmFbqkSHlQYWcF28ddyf4w8nUQ9T4IX2/aVo6xdlx6l9yp5BV+gczfITpNOOLqK01ir2C1SGj8sw/w6FkUWEbupSVd4Wrn5PLc4= salva@ubuntu Net-OpenSSH-0.60/t/test_server_key0000644000175000017500000000124011540354655016050 0ustar salvasalva-----BEGIN DSA PRIVATE KEY----- MIIBvAIBAAKBgQDHY0PncGbkV5C0K9I3KG1nrR1+7emNcyo2osxAEd+zriuDrB57 ERyYOgD4JJrcXCErSpwruOSkOuz4PYSq/NEF691LBvPzWkHmn+LlKqIeomSuHfDz m0F6WM17G7sRftpdFmBgfjaZIRs9mJkimhWGaqrjCZb/rz+xHAjI+iRZ/QIVAIa4 GVMztd3SAcuuYLyZClLKDLC7AoGBAJvdUavOJdWG7Ug0OsOpR3wxFgINbDKdcT76 THdYSxgCLfzOTssPHYBgvGl6XIQB+iGnnIqr7wb0Wjjqfn76vcduX5iwBvBV2BbW +nQsjq3v1HQzi2AtdtbJDz5x7syRAEa9X0Ee3BWufqNd6OoH3fJQkBXfMV7yLFAj FTgfZRKHAoGAEvIpE9Fce0eecx7BAeY7wwzhiNsgCp9ddb55FpRAYmJtWjJsi9U5 eANmagK25lOCKG7yFIkdS0m8oCy9KJ7sN8umdpYwk5c1K60luLY6vP+STQ400OGF ce7yka6ern0rWC6uMgWn2KSf+kJzVEyoy+Re5s01bb0Zm5StWxq9o4ICFQCAmnEu JHNcezcg8mLkW9gEfwhISw== -----END DSA PRIVATE KEY----- Net-OpenSSH-0.60/t/known_hosts0000644000175000017500000000112711540354655015213 0ustar salvasalvalocalhost ssh-dss 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 Net-OpenSSH-0.60/t/test_server_key.pub0000644000175000017500000000113211540354655016635 0ustar salvasalvassh-dss 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 salva@ubuntu Net-OpenSSH-0.60/Makefile.PL0000644000175000017500000000173111721153767014426 0ustar salvasalvause 5.008; use ExtUtils::MakeMaker; $^O =~ /Win32/ and die "This module does not work on MS Windows.\nTry installing a real OS!\n"; my $ssh_V = `ssh -V 2>&1`; if (defined $ssh_V) { chomp $ssh_V; if (my ($ver, $rev) = $ssh_V =~ /^openssh_(\d+)\.(\d+)/i) { if ($ver < 4 or ($ver == 4 and $rev < 1)) { warn < 'Net::OpenSSH', VERSION_FROM => 'lib/Net/OpenSSH.pm', ABSTRACT_FROM => 'lib/Net/OpenSSH.pm', PREREQ_PM => { Test::More => 0, }, AUTHOR => 'Salvador Fandino ' ); Net-OpenSSH-0.60/README0000644000175000017500000000133712107431137013323 0ustar salvasalvaNet-OpenSSH =========== Perl wrapper for OpenSSH secure shell client. INSTALLATION To install this module type the following: perl Makefile.PL make make test make install DEPENDENCIES This module requires these other modules and libraries: Test::More IO::Pty (optional, required for password authentication) Net::SFTP::Foreign (optional, required for SFTP support) OpenSSH binary client version 4.1 or later, 5.x recommended. COPYRIGHT AND LICENCE Copyright (C) 2008-2013 by Salvador Fandino This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.10.0 or, at your option, any later version of Perl 5 you may have available. Net-OpenSSH-0.60/lib/0000755000175000017500000000000012107432777013220 5ustar salvasalvaNet-OpenSSH-0.60/lib/Net/0000755000175000017500000000000012107432777013746 5ustar salvasalvaNet-OpenSSH-0.60/lib/Net/OpenSSH.pm0000644000175000017500000042305412107432246015562 0ustar salvasalvapackage Net::OpenSSH; our $VERSION = '0.60'; use strict; use warnings; our $debug ||= 0; our $FACTORY; use Carp qw(carp croak); use POSIX qw(:sys_wait_h); use Socket; use File::Spec; use Cwd (); use Scalar::Util (); use Errno (); use Net::OpenSSH::Constants qw(:error); my $thread_generation = 0; sub CLONE { $thread_generation++ }; sub _debug { print STDERR '# ', (map { defined($_) ? $_ : '' } @_), "\n" } sub _debug_dump { require Data::Dumper; local $Data::Dumper::Terse = 1; local $Data::Dumper::Indent = 0; my $head = shift; _debug("$head: ", Data::Dumper::Dumper(@_)); } sub _hexdump { no warnings qw(uninitialized); my $data = shift; while ($data =~ /(.{1,32})/smg) { my $line=$1; my @c= (( map { sprintf "%02x",$_ } unpack('C*', $line)), ((" ") x 32))[0..31]; $line=~s/(.)/ my $c=$1; unpack("c",$c)>=32 ? $c : '.' /egms; print STDERR "#> ", join(" ", @c, '|', $line), "\n"; } } { my %good; sub _sub_options { my $sub = shift; $good{__PACKAGE__ . "::$sub"} = { map { $_ => 1 } @_ }; } sub _croak_bad_options (\%) { my $opts = shift; if (%$opts) { my $sub = (caller 1)[3]; my $good = $good{$sub}; my @keys = ( $good ? grep !$good->{$_}, keys %$opts : keys %$opts); if (@keys) { croak "Invalid or bad combination of options ('" . CORE::join("', '", @keys) . "')"; } } } } sub _tcroak { if (${^TAINT} > 0) { push @_, " while running with -T switch"; goto &croak; } if (${^TAINT} < 0) { push @_, " while running with -t switch"; goto &carp; } } sub _catch_tainted_args { my $i; for (@_) { next unless $i++; if (Scalar::Util::tainted($_)) { my (undef, undef, undef, $subn) = caller 1; my $msg = ( $subn =~ /::([a-z]\w*)$/ ? "Insecure argument '$_' on '$1' method call" : "Insecure argument '$_' on method call" ); _tcroak($msg); } elsif (ref($_) eq 'HASH') { for (grep Scalar::Util::tainted($_), values %$_) { my (undef, undef, undef, $subn) = caller 1; my $msg = ( $subn =~ /::([a-z]\w*)$/ ? "Insecure argument on '$1' method call" : "Insecure argument on method call" ); _tcroak($msg); } } } } sub _set_error { my $self = shift; my $code = shift || 0; my $err = $self->{_error} = ( $code ? Scalar::Util::dualvar($code, join(': ', @{$self->{_error_prefix}}, (@_ ? @_ : "Unknown error $code"))) : 0 ); $debug and $debug & 1 and _debug "set_error($code - $err)"; return $err } my $check_eval_re = do { my $path = quotemeta $INC{"Net/OpenSSH.pm"}; qr/at $path line \d+.$/ }; sub _check_eval_ok { my ($self, $code) = @_; if ($@) { my $err = $@; $err =~ s/$check_eval_re//; $self->_set_error($code, $err); return; } 1 } sub _or_set_error { my $self = shift; $self->{_error} or $self->_set_error(@_); } sub _first_defined { defined && return $_ for @_; return } my $obfuscate = sub { # just for the casual observer... my $txt = shift; $txt =~ s/(.)/chr(ord($1) ^ 47)/ges if defined $txt; $txt; }; my $deobfuscate = $obfuscate; # regexp from Regexp::IPv6 my $IPv6_re = qr((?-xism::(?::[0-9a-fA-F]{1,4}){0,5}(?:(?::[0-9a-fA-F]{1,4}){1,2}|:(?:(?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})))|[0-9a-fA-F]{1,4}:(?:[0-9a-fA-F]{1,4}:(?:[0-9a-fA-F]{1,4}:(?:[0-9a-fA-F]{1,4}:(?:[0-9a-fA-F]{1,4}:(?:[0-9a-fA-F]{1,4}:(?:[0-9a-fA-F]{1,4}:(?:[0-9a-fA-F]{1,4}|:)|(?::(?:[0-9a-fA-F]{1,4})?|(?:(?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2}))))|:(?:(?:(?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2}))|[0-9a-fA-F]{1,4}(?::[0-9a-fA-F]{1,4})?|))|(?::(?:(?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2}))|:[0-9a-fA-F]{1,4}(?::(?:(?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2}))|(?::[0-9a-fA-F]{1,4}){0,2})|:))|(?:(?::[0-9a-fA-F]{1,4}){0,2}(?::(?:(?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2}))|(?::[0-9a-fA-F]{1,4}){1,2})|:))|(?:(?::[0-9a-fA-F]{1,4}){0,3}(?::(?:(?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2}))|(?::[0-9a-fA-F]{1,4}){1,2})|:))|(?:(?::[0-9a-fA-F]{1,4}){0,4}(?::(?:(?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2}))|(?::[0-9a-fA-F]{1,4}){1,2})|:)))); sub parse_connection_opts { my ($class, $opts) = @_; my ($user, $passwd, $ipv6, $host, $port, $host_squared); my $target = delete $opts->{host}; defined $target or croak "mandatory host argument missing"; ($user, $passwd, $ipv6, $host, $port) = $target =~ m{^ \s* # space (?: ([^\@:]+) # username (?::(.*))? # : password \@ # @ )? (?: # host ( # IPv6... \[$IPv6_re\] # [IPv6] | # or $IPv6_re # IPv6 ) | # or ([^\[\]\@:]+) # hostname / ipv4 ) (?::([^\@:]+))? # port \s* # space $}ix or croak "bad host/target '$target' specification"; if (defined $ipv6) { ($host) = $ipv6 =~ /^\[?(.*?)\]?$/; $host_squared = "[$host]"; } else { $host_squared = $host; } $user = delete $opts->{user} unless defined $user; $port = delete $opts->{port} unless defined $port; $passwd = delete $opts->{passwd} unless defined $passwd; $passwd = delete $opts->{password} unless defined $passwd; wantarray and return ($host, $port, $user, $passwd, $host_squared); my %r = ( user => $user, password => $passwd, host => $host, host_squared => $host_squared, port => $port ); $r{ipv6} = 1 if defined $ipv6; return \%r; } sub new { ${^TAINT} and &_catch_tainted_args; my $class = shift; @_ & 1 and unshift @_, 'host'; return $FACTORY->($class, @_) if defined $FACTORY; my %opts = @_; my $external_master = delete $opts{external_master}; # reuse_master is an obsolete alias: $external_master = delete $opts{reuse_master} unless defined $external_master; if (not defined $opts{host} and defined $external_master) { $opts{host} = 'UNKNOWN'; } my ($host, $port, $user, $passwd, $host_squared) = $class->parse_connection_opts(\%opts); my ($passphrase, $key_path, $login_handler); unless (defined $passwd) { $key_path = delete $opts{key_path}; $passwd = delete $opts{passphrase}; if (defined $passwd) { $passphrase = 1; } else { $login_handler = delete $opts{login_handler}; } } my $batch_mode = delete $opts{batch_mode}; my $ctl_path = delete $opts{ctl_path}; my $ctl_dir = delete $opts{ctl_dir}; my $proxy_command = delete $opts{proxy_command}; my $gateway = delete $opts{gateway} unless defined $proxy_command; my $ssh_cmd = _first_defined delete $opts{ssh_cmd}, 'ssh'; my $rsync_cmd = _first_defined delete $opts{rsync_cmd}, 'rsync'; my $scp_cmd = delete $opts{scp_cmd}; my $sshfs_cmd = _first_defined delete $opts{sshfs_cmd}, 'sshfs'; my $sftp_server_cmd = _first_defined delete $opts{sftp_server_cmd}, '/usr/lib/openssh/sftp-server'; my $timeout = delete $opts{timeout}; my $kill_ssh_on_timeout = delete $opts{kill_ssh_on_timeout}; my $strict_mode = _first_defined delete $opts{strict_mode}, 1; my $async = delete $opts{async}; my $target_os = _first_defined delete $opts{target_os}, 'unix'; my $expand_vars = delete $opts{expand_vars}; my $vars = _first_defined delete $opts{vars}, {}; my $default_encoding = delete $opts{default_encoding}; my $default_stream_encoding = _first_defined delete $opts{default_stream_encoding}, $default_encoding; my $default_argument_encoding = _first_defined delete $opts{default_argument_encoding}, $default_encoding; my $forward_agent = delete $opts{forward_agent}; $forward_agent and $passphrase and croak "agent forwarding can not be used when a passphrase has also been given"; my ($master_opts, @master_opts, $master_stdout_fh, $master_stderr_fh, $master_stdout_discard, $master_stderr_discard); unless ($external_master) { ($master_stdout_fh = delete $opts{master_stdout_fh} or $master_stdout_discard = delete $opts{master_stdout_discard}); ($master_stderr_fh = delete $opts{master_stderr_fh} or $master_stderr_discard = delete $opts{master_stderr_discard}); $master_opts = delete $opts{master_opts}; if (defined $master_opts) { if (ref $master_opts) { @master_opts = @$master_opts; } else { carp "'master_opts' argument looks like if it should be splited first" if $master_opts =~ /^-\w\s+\S/; @master_opts = $master_opts; } } } my $default_ssh_opts = delete $opts{default_ssh_opts}; carp "'default_ssh_opts' argument looks like if it should be splited first" if defined $default_ssh_opts and not ref $default_ssh_opts and $default_ssh_opts =~ /^-\w\s+\S/; my ($default_stdout_fh, $default_stderr_fh, $default_stdin_fh, $default_stdout_file, $default_stderr_file, $default_stdin_file, $default_stdout_discard, $default_stderr_discard, $default_stdin_discard); $default_stdout_file = (delete $opts{default_stdout_discard} ? '/dev/null' : delete $opts{default_stdout_file}); $default_stdout_fh = delete $opts{default_stdout_fh} unless defined $default_stdout_file; $default_stderr_file = (delete $opts{default_stderr_discard} ? '/dev/null' : delete $opts{default_stderr_file}); $default_stderr_fh = delete $opts{default_stderr_fh} unless defined $default_stderr_file; $default_stdin_file = (delete $opts{default_stdin_discard} ? '/dev/null' : delete $opts{default_stdin_file}); $default_stdin_fh = delete $opts{default_stdin_fh} unless defined $default_stdin_file; _croak_bad_options %opts; my @ssh_opts; # TODO: are those options really requiered or just do they eat on # the command line limited length? push @ssh_opts, -l => $user if defined $user; push @ssh_opts, -p => $port if defined $port; my $home = do { local ($@, $SIG{__DIE__}); eval { Cwd::realpath((getpwuid $>)[7]) } }; if (${^TAINT}) { ($home) = $home =~ /^(.*)$/; Scalar::Util::tainted($ENV{PATH}) and _tcroak('Insecure $ENV{PATH}'); } my $self = { _error => 0, _error_prefix => [], _perl_pid => $$, _thread_generation => $thread_generation, _ssh_cmd => $ssh_cmd, _scp_cmd => $scp_cmd, _rsync_cmd => $rsync_cmd, _sshfs_cmd => $sshfs_cmd, _sftp_server_cmd => $sftp_server_cmd, _pid => undef, _host => $host, _host_squared => $host_squared, _user => $user, _port => $port, _passwd => $obfuscate->($passwd), _passphrase => $passphrase, _key_path => $key_path, _login_handler => $login_handler, _timeout => $timeout, _proxy_command => $proxy_command, _gateway_args => $gateway, _kill_ssh_on_timeout => $kill_ssh_on_timeout, _batch_mode => $batch_mode, _home => $home, _forward_agent => $forward_agent, _external_master => $external_master, _default_ssh_opts => $default_ssh_opts, _default_stdin_fh => $default_stdin_fh, _default_stdout_fh => $default_stdout_fh, _default_stderr_fh => $default_stderr_fh, _master_stdout_fh => $master_stdout_fh, _master_stderr_fh => $master_stderr_fh, _master_stdout_discard => $master_stdout_discard, _master_stderr_discard => $master_stderr_discard, _target_os => $target_os, _default_stream_encoding => $default_stream_encoding, _default_argument_encoding => $default_argument_encoding, _expand_vars => $expand_vars, _vars => $vars, }; bless $self, $class; # default file handles are opened so late in order to have the # $self object to report errors $self->{_default_stdout_fh} = $self->_open_file('>', $default_stdout_file) if defined $default_stdout_file; $self->{_default_stderr_fh} = $self->_open_file('>', $default_stderr_file) if defined $default_stderr_file; $self->{_default_stdin_fh} = $self->_open_file('<', $default_stdin_file) if defined $default_stdin_file; if ($self->error == OSSH_SLAVE_PIPE_FAILED) { $self->_set_error(OSSH_MASTER_FAILED, "Unable to create default slave stream: " . $self->error); return $self; } $self->{_ssh_opts} = [$self->_expand_vars(@ssh_opts)]; $self->{_master_opts} = [$self->_expand_vars(@master_opts)]; $ctl_path = $self->_expand_vars($ctl_path); $ctl_dir = $self->_expand_vars($ctl_dir); unless (defined $ctl_path) { $external_master and croak "external_master is set but ctl_path is not defined"; unless (defined $ctl_dir) { unless (defined $self->{_home}) { $self->_set_error(OSSH_MASTER_FAILED, "unable to determine home directory for uid $>"); return $self; } $ctl_dir = File::Spec->catdir($self->{_home}, ".libnet-openssh-perl"); } my $old_umask = umask 077; mkdir $ctl_dir; umask $old_umask; unless (-d $ctl_dir) { $self->_set_error(OSSH_MASTER_FAILED, "unable to create ctl_dir $ctl_dir"); return $self; } my $target = join('-', grep defined, $user, $host, $port); for (1..10) { $ctl_path = File::Spec->join($ctl_dir, sprintf("%s-%d-%d", substr($target, 0, 20), $$, rand(1e6))); last unless -e $ctl_path } if (-e $ctl_path) { $self->_set_error(OSSH_MASTER_FAILED, "unable to find unused name for ctl_path inside ctl_dir $ctl_dir"); return $self; } } $ctl_dir = File::Spec->catpath((File::Spec->splitpath($ctl_path))[0,1], ""); $debug and $debug & 2 and _debug "ctl_path: $ctl_path, ctl_dir: $ctl_dir"; if ($strict_mode and !$self->_is_secure_path($ctl_dir)) { $self->_set_error(OSSH_MASTER_FAILED, "ctl_dir $ctl_dir is not secure"); return $self; } $self->{_ctl_path} = $ctl_path; if ($external_master) { $self->_wait_for_master($async, 1); } else { $self->_connect($async); } $self; } sub get_user { shift->{_user} } sub get_host { shift->{_host} } sub get_port { shift->{_port} } sub get_master_pid { shift->{_pid} } sub get_ctl_path { shift->{_ctl_path} } sub get_expand_vars { shift->{_expand_vars} } sub set_expand_vars { my $self = shift; $self->{_expand_vars} = (shift(@_) ? 1 : 0); } sub set_var { ${^TAINT} and &_catch_tainted_args; my $self = shift; my $k = shift; $k =~ /^(?:USER|HOST|PORT)$/ and croak "internal variable %$k% can not be set"; $self->{_vars}{$k} = shift; } sub get_var { my ($self, $k) = @_; my $v = ( $k =~ /^(?:USER|HOST|PORT)$/ ? $self->{lc "_$k"} : $self->{_vars}{$k} ); (defined $v ? $v : ''); } sub _expand_vars { my ($self, @str) = @_; if (ref $self and $self->{_expand_vars}) { for (@str) { s{%(\w*)%}{length ($1) ? $self->get_var($1) : '%'}ge if defined $_; } } wantarray ? @str : $str[0] } sub error { shift->{_error} } sub die_on_error { my $ssh = shift; $ssh->{_error} and croak(@_ ? "@_: $ssh->{_error}" : $ssh->{_error}); } sub _is_secure_path { my ($self, $path) = @_; my @parts = File::Spec->splitdir(Cwd::realpath($path)); my $home = $self->{_home}; for my $last (reverse 0..$#parts) { my $dir = File::Spec->catdir(@parts[0..$last]); unless (-d $dir) { $debug and $debug & 2 and _debug "$dir is not a directory"; return undef; } my ($mode, $uid) = (stat $dir)[2, 4]; $debug and $debug & 2 and _debug "_is_secure_path(dir: $dir, file mode: $mode, file uid: $uid, euid: $>"; return undef unless(($uid == $> or $uid == 0 ) and (($mode & 022) == 0 or ($mode & 01000))); return 1 if (defined $home and $home eq $dir); } return 1; } sub _make_ssh_call { my $self = shift; my @before = @{shift || []}; my @args = ($self->{_ssh_cmd}, @before, -S => $self->{_ctl_path}, @{$self->{_ssh_opts}}, $self->{_host}, '--', (@_ ? "@_" : ())); $debug and $debug & 8 and _debug_dump 'call args' => \@args; @args; } sub _scp_cmd { my $self = shift; $self->{_scp_cmd} ||= do { my $scp = $self->{_ssh_cmd}; $scp =~ s/ssh$/scp/i or croak "scp command name not set"; $scp; } } sub _make_scp_call { my $self = shift; my @before = @{shift || []}; my @args = ($self->_scp_cmd, @before, -o => "ControlPath=$self->{_ctl_path}", -S => $self->{_ssh_cmd}, (defined $self->{_port} ? (-P => $self->{_port}) : ()), '--', @_); $debug and $debug & 8 and _debug_dump 'scp call args' => \@args; @args; } sub _rsync_quote { my ($self, @args) = @_; for (@args) { if (/['"\s]/) { s/"/""/g; $_ = qq|"$_"|; } s/%/%%/; } wantarray ? @args : join(' ', @args); } sub _make_rsync_call { my $self = shift; my $before = shift; my @transport = ($self->{_ssh_cmd}, @$before, -S => $self->{_ctl_path}); my $transport = $self->_rsync_quote(@transport); my @args = ( $self->{_rsync_cmd}, -e => $transport, @_); $debug and $debug & 8 and _debug_dump 'rsync call args' => \@args; @args; } sub _make_tunnel_call { @_ == 4 or croak "bad number of arguments for creating a tunnel"; my $self = shift; my @before = @{shift||[]}; my $dest = join(':', @_); push @before, "-W$dest"; my @args = $self->_make_ssh_call(\@before); $debug and $debug & 8 and _debug_dump 'tunnel call args' => \@args; @args; } sub master_exited { my $self = shift; my $pid = delete $self->{_pid}; delete $self->{_wfm_state}; $self->_set_error(OSSH_MASTER_FAILED, "master ssh connection broken"); undef; } sub _kill_master { my $self = shift; my $pid = delete $self->{_pid}; $debug and $debug & 32 and _debug '_kill_master: ', $pid; if ($pid and $self->{_perl_pid} == $$ and $self->{_thread_generation} == $thread_generation) { local $SIG{CHLD} = sub {}; for my $sig (0, 0, 'TERM', 'TERM', 'TERM', 'KILL', 'KILL') { if ($sig) { $debug and $debug & 32 and _debug "killing master with signal $sig"; kill $sig, $pid or return; } for (0..5) { my $r = waitpid($pid, WNOHANG); $debug and $debug & 32 and _debug "waitpid(master: $pid) => pid: $r, rc: $!"; return if ($r == $pid or $! == Errno::ECHILD); select(undef, undef, undef, 0.2); } } warn "unable to kill SSH master connection (pid: $pid)"; } } sub _check_is_system_fh { my ($name, $fh) = @_; my $fn = fileno(defined $fh ? $fh : $name); defined $fn and $fn >= 0 and return; croak "child process $name is not a real system file handle"; } sub _master_redirect { my $self = shift; my $uname = uc shift; my $name = lc $uname; no strict 'refs'; if ($self->{"_master_${name}_discard"}) { open *$uname, '>>', '/dev/null'; } else { my $fh = $self->{"_master_${name}_fh"}; $fh = $self->{"_default_${name}_fh"} unless defined $fh; if (defined $fh) { _check_is_system_fh $uname => $fh; if (fileno $fh != fileno *$uname) { open *$uname, '>>&', $fh or POSIX::_exit(255); } } } } sub _connect { my ($self, $async) = @_; $self->_set_error; my $timeout = int((($self->{_timeout} || 90) + 2)/3); my @master_opts = (@{$self->{_master_opts}}, -o => "ServerAliveInterval=$timeout", '-x2MN'); my ($mpty, $use_pty, $pref_auths); $use_pty = 1 if defined $self->{_login_handler}; if (defined $self->{_passwd}) { $use_pty = 1; $pref_auths = ($self->{_passphrase} ? 'publickey' : 'keyboard-interactive,password'); push @master_opts, -o => 'NumberOfPasswordPrompts=1'; } elsif ($self->{_batch_mode}) { push @master_opts, -o => 'BatchMode=yes'; } if (defined $self->{_key_path}) { $pref_auths = 'publickey'; push @master_opts, -i => $self->{_key_path}; } if (defined $self->{_forward_agent}) { push @master_opts, ($self->{_forward_agent} ? '-A' : '-a'); } my $proxy_command = $self->{_proxy_command}; my $gateway; if (my $gateway_args = $self->{_gateway_args}) { if (ref $gateway_args eq 'HASH') { _load_module('Net::OpenSSH::Gateway'); my $errors; unless ($gateway = Net::OpenSSH::Gateway->find_gateway(errors => $errors, host => $self->{_host}, port => $self->{_port}, %$gateway_args)) { $self->_set_error(OSSH_MASTER_FAILED, 'Unable to build gateway object', join(', ', @$errors)); return undef; } } else { $gateway = $gateway_args } $self->{_gateway} = $gateway; unless ($gateway->before_ssh_connect) { $self->_set_error(OSSH_MASTER_FAILED, 'Gateway setup failed', join(', ', $gateway->errors)); return; } $proxy_command = $gateway->proxy_command; } if (defined $proxy_command) { push @master_opts, -o => "ProxyCommand=$proxy_command"; } if ($use_pty) { _load_module('IO::Pty'); $self->{_mpty} = $mpty = IO::Pty->new; } push @master_opts, -o => "PreferredAuthentications=$pref_auths" if defined $pref_auths; my @call = $self->_make_ssh_call(\@master_opts); local $SIG{CHLD}; my $pid = fork; unless (defined $pid) { $self->_set_error(OSSH_MASTER_FAILED, "unable to fork ssh master: $!"); return undef; } unless ($pid) { if ($debug and $debug & 512) { require Net::OpenSSH::OSTracer; Net::OpenSSH::OSTracer->trace; } $mpty->make_slave_controlling_terminal if $mpty; $self->_master_redirect('STDOUT'); $self->_master_redirect('STDERR'); delete $ENV{SSH_ASKPASS} if defined $self->{_passwd}; delete $ENV{SSH_AUTH_SOCK} if defined $self->{_passphrase}; local $SIG{__DIE__}; eval { exec @call }; POSIX::_exit(255); } $self->{_pid} = $pid; my $r = $self->_wait_for_master($async, 1); $mpty->close_slave if $mpty; $r; } sub _waitpid { my ($self, $pid, $timeout) = @_; $? = 0; if ($pid) { $timeout = $self->{_timeout} unless defined $timeout; my $time_limit; if (defined $timeout and $self->{_kill_ssh_on_timeout}) { $timeout = 0 if $self->error == OSSH_SLAVE_TIMEOUT; $time_limit = time + $timeout; } local $SIG{CHLD} = sub {}; while (1) { my $r; if (defined $time_limit) { while (1) { # TODO: we assume that all OSs return 0 when the # process is still running, that may not be true! $r = waitpid($pid, WNOHANG) and last; my $remaining = $time_limit - time; if ($remaining <= 0) { $debug and $debug & 16 and _debug "killing SSH slave, pid: $pid"; kill TERM => $pid; $self->_or_set_error(OSSH_SLAVE_TIMEOUT, "ssh slave failed", "timed out"); } # There is a race condition here. We try to # minimize it keeping the waitpid and the select # together and limiting the sleep time to 1s: my $sleep = ($remaining < 0.1 ? 0.1 : 1); $debug and $debug & 16 and _debug "waiting for slave, timeout: $timeout, remaining: $remaining, sleep: $sleep"; $r = waitpid($pid, WNOHANG) and last; select(undef, undef, undef, $sleep); } } else { $r = waitpid($pid, 0); } $debug and $debug & 16 and _debug "_waitpid($pid) => pid: $r, rc: $!"; if ($r == $pid) { if ($?) { my $signal = ($? & 255); my $errstr = "child exited with code " . ($? >> 8); $errstr .= ", signal $signal" if $signal; $self->_or_set_error(OSSH_SLAVE_CMD_FAILED, $errstr); return undef; } return 1; } if ($r > 0) { warn "internal error: spurious process $r exited"; next; } next if $! == Errno::EINTR(); if ($! == Errno::ECHILD) { $self->_or_set_error(OSSH_SLAVE_FAILED, "child process $pid does not exist", $!); return undef } warn "Internal error: unexpected error (".($!+0).": $!) from waitpid($pid) = $r. Report it, please!"; # wait a bit before trying again select(undef, undef, undef, 0.1); } } else { $self->_or_set_error(OSSH_SLAVE_FAILED, "spawning of new process failed"); return undef; } } sub wait_for_master { my $self = shift; @_ <= 1 or croak 'Usage: $ssh->wait_for_master([$async])'; return undef if $self->{_error} == OSSH_MASTER_FAILED; $self->{_error} = 0; return $self->_wait_for_master($_[0]) if $self->{_wfm_state}; unless (-S $self->{_ctl_path}) { $self->_set_error(OSSH_MASTER_FAILED, "master ssh connection broken"); return undef; } 1; } sub check_master { my $self = shift; @_ and croak 'Usage: $ssh->check_master()'; $self->{_error} = 0; $self->_wait_for_master; } sub _wait_for_master { my ($self, $async, $reset) = @_; my $state = delete $self->{_wfm_state} || 'waiting_for_mux_socket'; my $bout = \ ($self->{_wfm_bout}); my $mpty = $self->{_mpty}; my $passwd = $deobfuscate->($self->{_passwd}); my $login_handler = $self->{_login_handler}; my $pid = $self->{_pid}; # an undefined pid indicates we are reusing a master connection if ($reset) { $$bout = ''; $state = ( (defined $passwd and $pid) ? 'waiting_for_password_prompt' : (defined $login_handler) ? 'waiting_for_login_handler' : 'waiting_for_mux_socket' ); } my $ctl_path = $self->{_ctl_path}; my $dt = ($async ? 0 : 0.1); my $timeout = $self->{_timeout}; my $start_time = time; my $fnopty; my $rv = ''; if ($state eq 'waiting_for_password_prompt') { $fnopty = fileno $mpty; vec($rv, $fnopty, 1) = 1 } local $self->{_error_prefix} = [@{$self->{_error_prefix}}, "unable to establish master SSH connection"]; while (1) { last if (defined $timeout and (time - $start_time) > $timeout); if (-e $ctl_path) { $debug and $debug & 4 and _debug "file object found at $ctl_path"; unless (-S $ctl_path) { $self->_set_error(OSSH_MASTER_FAILED, "bad ssh master at $ctl_path, object is not a socket"); $self->_kill_master; return undef; } my $check = $self->_master_ctl('check'); if (defined $check) { my $error; if ($check =~ /pid=(\d+)/) { return 1 if (!$pid or $1 == $pid); $error = "bad ssh master at $ctl_path, socket owned by pid $1 (pid $pid expected)"; } elsif ($check =~ /illegal option/i) { $error = "OpenSSH 4.1 or later required"; } else { $error = "Unknown error"; } $self->_or_set_error(OSSH_MASTER_FAILED, $error); } $self->_kill_master; return undef; } $debug and $debug & 4 and _debug "file object not yet found at $ctl_path"; if ($self->{_perl_pid} != $$ or $self->{_thread_generation} != $thread_generation) { $self->_set_error(OSSH_MASTER_FAILED, "process was forked or threaded before SSH connection had been established"); return undef; } if (!$pid) { $self->_set_error(OSSH_MASTER_FAILED, "socket does not exist"); return undef; } elsif (waitpid($pid, WNOHANG) == $pid or $! == Errno::ECHILD) { my $error = "master process exited unexpectedly"; $error = "bad pass" . ($self->{_passphrase} ? 'phrase' : 'word') . " or $error" if defined $self->{_passwd}; $self->_set_error(OSSH_MASTER_FAILED, $error); return undef; } if ($state eq 'waiting_for_login_handler') { local ($@, $SIG{__DIE__}); if (eval { $login_handler->($self, $mpty, $bout) }) { $state = 'waiting_for_mux_socket'; next; } if ($@) { $self->_set_error(OSSH_MASTER_FAILED, "custom login handler failed: $@"); return undef; } } else { my $rv1 = $rv; my $n = select($rv1, undef, undef, $dt); if ($n > 0) { vec($rv1, $fnopty, 1) or die "internal error"; my $read = sysread($mpty, $$bout, 4096, length $$bout); if ($read) { if ($state eq 'waiting_for_password_prompt') { if ($$bout =~ /The authenticity of host.*can't be established/si) { $self->_set_error(OSSH_MASTER_FAILED, "the authenticity of the target host can't be established, the remote host " . "public key is probably not present on the '~/.ssh/known_hosts' file"); $self->_kill_master; return undef; } if ($$bout =~ s/^(.*:)//s) { $debug and $debug & 4 and _debug "passwd/passphrase requested ($1)"; print $mpty "$passwd\n"; $state = 'waiting_for_mux_socket'; } } else { $$bout = '' } next; } } } if ($async) { $self->{_wfm_state} = $state; return 0; } else { select(undef, undef, undef, $dt); } } $self->_set_error(OSSH_MASTER_FAILED, "login timeout"); $self->_kill_master; undef; } sub _master_ctl { my ($self, $cmd) = @_; local $self->{_error_prefix} = [@{$self->{_error_prefix}}, "control command failed"]; $self->capture({ encoding => 'bytes', # don't let the encoding # stuff go in the way stdin_discard => 1, tty => 0, stderr_to_stdout => 1, ssh_opts => [-O => $cmd]}); } sub stop { # FIXME: this method currently fails because of a bug in ssh. my ($self, $timeout) = @_; my $pid = $self->{_pid}; $self->_master_ctl('stop'); if (not $self->error and $pid and $self->{_perl_pid} == $$ and $self->{_thread_generation} == $thread_generation) { local $self->{_kill_ssh_on_timeout}; if ($self->_waitpid($pid, $timeout)) { delete $self->{_pid}; $self->_set_error(OSSH_MASTER_FAILED, "master ssh connection stopped"); return 1; } else { return $self->_kill_master; } } undef; } sub _make_pipe { my $self = shift; my ($r, $w); if (pipe $r, $w) { my $old = select; select $r; $ |= 1; select $w; $ |= 1; select $old; return ($r, $w); } $self->_set_error(OSSH_SLAVE_PIPE_FAILED, "unable to create pipe: $!"); return; } my %loaded_module; sub _load_module { my ($module, $version) = @_; $loaded_module{$module} ||= do { do { local ($@, $SIG{__DIE__}); eval "require $module; 1" } or croak "unable to load Perl module $module"; 1 }; if (defined $version) { local ($@, $SIG{__DIE__}); my $mv = eval "\$${module}::VERSION" || 0; (my $mv1 = $mv) =~ s/_\d*$//; croak "$module version $version required, $mv is available" if $mv1 < $version; } 1 } my $noquote_class = '.\\w/\\-@,:'; my $glob_class = '*?\\[\\],{}:!^~'; sub _arg_quoter { sub { my $quoted = join '', map { ( m|^'$| ? "\\'" : m|^[$noquote_class]*$|o ? $_ : "'$_'" ) } split /(')/, $_[0]; length $quoted ? $quoted : "''"; } } sub _arg_quoter_glob { sub { my $arg = shift; my @parts; while ((pos $arg ||0) < length $arg) { if ($arg =~ m|\G'|gc) { push @parts, "\\'"; } elsif ($arg =~ m|\G([$noquote_class$glob_class]+)|gco) { push @parts, $1; } elsif ($arg =~ m|\G(\\[$glob_class\\])|gco) { push @parts, $1; } elsif ($arg =~ m|\G\\|gc) { push @parts, '\\\\' } elsif ($arg =~ m|\G([^$glob_class\\']+)|gco) { push @parts, "'$1'"; } else { require Data::Dumper; $arg =~ m|\G(.+)|gc; die "Internal error: unquotable string:\n". Data::Dumper::Dumper($1) ."\n"; } } my $quoted = join('', @parts); length $quoted ? $quoted : "''"; # my $arg = shift; # return $arg if $arg =~ m|^[\w/\-+=?\[\],{}\@!.^~]+$|; # return "''" if $arg eq ''; # $arg =~ s|(? 127 ? $1 : $1 eq "\n" ? "'\n'" : "\\$1"|ge; # $arg; } } sub _quote_args { my $self = shift; my $opts = shift; ref $opts eq 'HASH' or die "internal error"; my $quote = delete $opts->{quote_args}; my $quote_extended = delete $opts->{quote_args_extended}; my $glob_quoting = delete $opts->{glob_quoting}; $quote = (@_ > 1) unless defined $quote; if ($quote) { my $quoter_glob = $self->_arg_quoter_glob; my $quoter = ($glob_quoting ? $quoter_glob : $self->_arg_quoter); # foo => $quoter # \foo => $quoter_glob # \\foo => no quoting at all and disable extended quoting as it is not safe my @quoted; for (@_) { if (ref $_) { if (ref $_ eq 'SCALAR') { push @quoted, $quoter_glob->($self->_expand_vars($$_)); } elsif (ref $_ eq 'REF' and ref $$_ eq 'SCALAR') { push @quoted, $self->_expand_vars($$$_); undef $quote_extended; } else { croak "invalid reference in remote command argument list" } } else { push @quoted, $quoter->($self->_expand_vars($_)); } } if ($quote_extended) { push @quoted, '{stdin_discard}; if ($opts->{stdout_discard}) { push @quoted, '>/dev/null'; push @quoted, '2>&1' if ($opts->{stderr_to_stdout} || $opts->{stderr_discard}) } else { push @quoted, '2>/dev/null' if $opts->{stderr_discard}; } } wantarray ? @quoted : join(" ", @quoted); } else { croak "reference found in argument list when argument quoting is disabled" if (grep ref, @_); my @args = $self->_expand_vars(@_); wantarray ? @args : join(" ", @args); } } sub shell_quote { shift->_quote_args({quote_args => 1}, @_); } sub shell_quote_glob { shift->_quote_args({quote_args => 1, glob_quoting => 1}, @_); } sub _array_or_scalar_to_list { map { defined($_) ? (ref $_ eq 'ARRAY' ? @$_ : $_ ) : () } @_ } sub make_remote_command { my $self = shift; $self->wait_for_master or return; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); my @ssh_opts = _array_or_scalar_to_list delete $opts{ssh_opts}; my $tty = delete $opts{tty}; push @ssh_opts, ($tty ? '-qtt' : '-T') if defined $tty; if ($self->{_forward_agent}) { my $forward_agent = delete $opts{forward_agent}; push @ssh_opts, ($forward_agent ? '-A' : '-a') if defined $forward_agent; } my $tunnel = delete $opts{tunnel}; my (@args); if ($tunnel) { @_ == 2 or croak "two arguments are required for tunnel command"; push @ssh_opts, "-W" . join(":", @_); } else { @args = $self->_quote_args(\%opts, @_); } _croak_bad_options %opts; my @call = $self->_make_ssh_call(\@ssh_opts, @args); if (wantarray) { $debug and $debug & 16 and _debug_dump make_remote_command => \@call; return @call; } else { my $call = join ' ', $self->shell_quote(@call); $debug and $debug & 16 and _debug_dump 'make_remote_command (quoted)' => $call; return $call } } sub _open_file { my ($self, $default_mode, $name_or_args) = @_; my ($mode, @args) = (ref $name_or_args ? @$name_or_args : ($default_mode, $name_or_args)); @args = $self->_expand_vars(@args); if (open my $fh, $mode, @args) { return $fh; } else { $self->_set_error(OSSH_SLAVE_PIPE_FAILED, "Unable to open file '$args[0]': $!"); return undef; } } sub _fileno_dup_over { my ($good_fn, $fh) = @_; if (defined $fh) { my @keep_open; my $fn = fileno $fh; for (1..5) { $fn >= $good_fn and return $fn; $fn = POSIX::dup($fn); push @keep_open, $fn; } POSIX::_exit(255); } undef; } sub _exec_dpipe { my ($self, $cmd, $io, $err) = @_; my $io_fd = _fileno_dup_over(3 => $io); my $err_fd = _fileno_dup_over(3 => $err); POSIX::dup2($io_fd, 0); POSIX::dup2($io_fd, 1); POSIX::dup2($err_fd, 2) if defined $err_fd; if (ref $cmd) { exec @$cmd; } else { exec $cmd; } } sub _delete_stream_encoding { my ($self, $opts) = @_; _first_defined(delete $opts->{stream_encoding}, $opts->{encoding}, $self->{_default_stream_encoding}); } sub _delete_argument_encoding { my ($self, $opts) = @_; _first_defined(delete $opts->{argument_encoding}, delete $opts->{encoding}, $self->{_default_argument_encoding}); } sub open_ex { ${^TAINT} and &_catch_tainted_args; my $self = shift; $self->wait_for_master or return; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); my $tunnel = delete $opts{tunnel}; my ($stdinout_socket, $stdinout_dpipe_make_parent); my $stdinout_dpipe = delete $opts{stdinout_dpipe}; if ($stdinout_dpipe) { $stdinout_dpipe_make_parent = delete $opts{stdinout_dpipe_make_parent}; $stdinout_socket = 1; } else { $stdinout_socket = delete $opts{stdinout_socket}; } my ($stdin_discard, $stdin_pipe, $stdin_fh, $stdin_file, $stdin_pty, $stdout_discard, $stdout_pipe, $stdout_fh, $stdout_file, $stdout_pty, $stderr_discard, $stderr_pipe, $stderr_fh, $stderr_file, $stderr_to_stdout); unless ($stdinout_socket) { ( $stdin_discard = delete $opts{stdin_discard} or $stdin_pipe = delete $opts{stdin_pipe} or $stdin_fh = delete $opts{stdin_fh} or $stdin_file = delete $opts{stdin_file} or (not $tunnel and $stdin_pty = delete $opts{stdin_pty}) ); ( $stdout_discard = delete $opts{stdout_discard} or $stdout_pipe = delete $opts{stdout_pipe} or $stdout_fh = delete $opts{stdout_fh} or $stdout_file = delete $opts{stdout_file} or (not $tunnel and $stdout_pty = delete $opts{stdout_pty}) ); $stdout_pty and !$stdin_pty and croak "option stdout_pty requires stdin_pty set"; } ( $stderr_discard = delete $opts{stderr_discard} or $stderr_pipe = delete $opts{stderr_pipe} or $stderr_fh = delete $opts{stderr_fh} or $stderr_to_stdout = delete $opts{stderr_to_stdout} or $stderr_file = delete $opts{stderr_file} ); my $argument_encoding = $self->_delete_argument_encoding(\%opts); my $ssh_opts = delete $opts{ssh_opts}; $ssh_opts = $self->{_default_ssh_opts} unless defined $ssh_opts; my @ssh_opts = $self->_expand_vars(_array_or_scalar_to_list $ssh_opts); if ($self->{_forward_agent}) { my $forward_agent = delete $opts{forward_agent}; push @ssh_opts, ($forward_agent ? '-A' : '-a') if defined $forward_agent; } my ($cmd, $close_slave_pty, @args); if ($tunnel) { @_ == 2 or croak 'bad number of arguments for tunnel, use $ssh->method(\\%opts, $host, $port)'; @args = @_; } else { if ($stdin_pty) { $close_slave_pty = delete $opts{close_slave_pty}; $close_slave_pty = 1 unless defined $close_slave_pty; } my $tty = delete $opts{tty}; push @ssh_opts, ($tty ? '-qtt' : '-T') if defined $tty; $cmd = delete $opts{_cmd} || 'ssh'; $opts{quote_args_extended} = 1 if (not defined $opts{quote_args_extended} and $cmd eq 'ssh'); @args = $self->_quote_args(\%opts, @_); $self->_encode_args($argument_encoding, @args) or return; } _croak_bad_options %opts; if (defined $stdin_file) { $stdin_fh = $self->_open_file('<', $stdin_file) or return } if (defined $stdout_file) { $stdout_fh = $self->_open_file('>', $stdout_file) or return } if (defined $stderr_file) { $stderr_fh = $self->_open_file('>', $stderr_file) or return } my ($rin, $win, $rout, $wout, $rerr, $werr); if ($stdinout_socket) { unless(socketpair $rin, $win, AF_UNIX, SOCK_STREAM, PF_UNSPEC) { $self->_set_error(OSSH_SLAVE_PIPE_FAILED, "socketpair failed: $!"); return; } $wout = $rin; } else { if ($stdin_pipe) { ($rin, $win) = $self->_make_pipe or return; } elsif ($stdin_pty) { _load_module('IO::Pty'); $win = IO::Pty->new; unless ($win) { $self->_set_error(OSSH_SLAVE_PIPE_FAILED, "unable to allocate pseudo-tty: $!"); return; } $rin = $win->slave; } elsif (defined $stdin_fh) { $rin = $stdin_fh; } else { $rin = $self->{_default_stdin_fh} } _check_is_system_fh STDIN => $rin; if ($stdout_pipe) { ($rout, $wout) = $self->_make_pipe or return; } elsif ($stdout_pty) { $wout = $rin; } elsif (defined $stdout_fh) { $wout = $stdout_fh; } else { $wout = $self->{_default_stdout_fh}; } _check_is_system_fh STDOUT => $wout; } unless ($stderr_to_stdout) { if ($stderr_pipe) { ($rerr, $werr) = $self->_make_pipe or return; } elsif (defined $stderr_fh) { $werr = $stderr_fh; } else { $werr = $self->{_default_stderr_fh}; } _check_is_system_fh STDERR => $werr; } my @call = ( $tunnel ? $self->_make_tunnel_call(\@ssh_opts, @args) : $cmd eq 'ssh' ? $self->_make_ssh_call(\@ssh_opts, @args) : $cmd eq 'scp' ? $self->_make_scp_call(\@ssh_opts, @args) : $cmd eq 'rsync' ? $self->_make_rsync_call(\@ssh_opts, @args) : die "internal error: bad _cmd protocol" ); $debug and $debug & 16 and _debug_dump open_ex => \@call; my $pid = fork; unless ($pid) { unless (defined $pid) { $self->_set_error(OSSH_SLAVE_FAILED, "unable to fork new ssh slave: $!"); return; } $stdin_discard and (open $rin, '<', '/dev/null' or POSIX::_exit(255)); $stdout_discard and (open $wout, '>', '/dev/null' or POSIX::_exit(255)); $stderr_discard and (open $werr, '>', '/dev/null' or POSIX::_exit(255)); if ($stdinout_dpipe) { my $pid1 = fork; defined $pid1 or POSIX::_exit(255); unless ($pid1 xor $stdinout_dpipe_make_parent) { eval { $self->_exec_dpipe($stdinout_dpipe, $win, $werr) }; POSIX::_exit(255); } } my $rin_fd = _fileno_dup_over(0 => $rin); my $wout_fd = _fileno_dup_over(1 => $wout); my $werr_fd = _fileno_dup_over(2 => $werr); if (defined $rin_fd) { $win->make_slave_controlling_terminal if $stdin_pty; $rin_fd == 0 or POSIX::dup2($rin_fd, 0) or POSIX::_exit(255); } if (defined $wout_fd) { $wout_fd == 1 or POSIX::dup2($wout_fd, 1) or POSIX::_exit(255); } if (defined $werr_fd) { $werr_fd == 2 or POSIX::dup2($werr_fd, 2) or POSIX::_exit(255); } elsif ($stderr_to_stdout) { POSIX::dup2(1, 2) or POSIX::_exit(255); } do { exec @call }; POSIX::_exit(255); } $win->close_slave() if $close_slave_pty; undef $win if defined $stdinout_dpipe; wantarray ? ($win, $rout, $rerr, $pid) : $pid; } sub pipe_in { ${^TAINT} and &_catch_tainted_args; my $self = shift; $self->wait_for_master or return; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); my $argument_encoding = $self->_delete_argument_encoding(\%opts); my @args = $self->_quote_args(\%opts, @_); _croak_bad_options %opts; $self->_encode_args($argument_encoding, @args) or return; my @call = $self->_make_ssh_call([], @args); $debug and $debug & 16 and _debug_dump pipe_in => @call; my $pid = open my $rin, '|-', @call; unless ($pid) { $self->_set_error(OSSH_SLAVE_FAILED, "unable to fork new ssh slave: $!"); return; } return wantarray ? ($rin, $pid) : $rin; } sub pipe_out { ${^TAINT} and &_catch_tainted_args; my $self = shift; $self->wait_for_master or return; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); my $argument_encoding = $self->_delete_argument_encoding(\%opts); my @args = $self->_quote_args(\%opts, @_); _croak_bad_options %opts; $self->_encode_args($argument_encoding, @args) or return; my @call = $self->_make_ssh_call([], @args); $debug and $debug & 16 and _debug_dump pipe_out => @call; my $pid = open my $rout, '-|', @call; unless ($pid) { $self->_set_error(OSSH_SLAVE_FAILED, "unable to fork new ssh slave: $!"); return; } return wantarray ? ($rout, $pid) : $rout; } sub _find_encoding { my ($self, $encoding, $data) = @_; if (defined $encoding and $encoding ne 'bytes') { _load_module('Encode'); my $enc = Encode::find_encoding($encoding); unless (defined $enc) { $self->_set_error(OSSH_ENCODING_ERROR, "bad encoding '$encoding'"); return } return $enc } return undef } sub _encode { my $self = shift; my $enc = shift; if (defined $enc and @_) { local ($@, $SIG{__DIE__}); eval { for (@_) { defined or next; $_ = $enc->encode($_, Encode::FB_CROAK()); } }; $self->_check_eval_ok(OSSH_ENCODING_ERROR) or return undef; } 1; } sub _encode_args { if (@_ > 2) { my $self = shift; my $encoding = shift; my $enc = $self->_find_encoding($encoding); if ($enc) { local $self->{_error_prefix} = [@{$self->{_error_prefix}}, "argument encoding failed"]; $self->_encode($enc, @_); } return !$self->error; } 1; } sub _decode { my $self = shift; my $enc = shift; local ($@, $SIG{__DIE__}); eval { for (@_) { defined or next; $_ = $enc->decode($_, Encode::FB_CROAK()); } }; $self->_check_eval_ok(OSSH_ENCODING_ERROR); } sub _io3 { my ($self, $out, $err, $in, $stdin_data, $timeout, $encoding) = @_; $self->wait_for_master or return; my @data = _array_or_scalar_to_list $stdin_data; my ($cout, $cerr, $cin) = (defined($out), defined($err), defined($in)); $timeout = $self->{_timeout} unless defined $timeout; my $has_input = grep { defined and length } @data; if ($cin and !$has_input) { close $in; undef $cin; } elsif (!$cin and $has_input) { croak "remote input channel is not defined but data is available for sending" } my $enc = $self->_find_encoding($encoding); if ($enc and @data) { local $self->{_error_prefix} = [@{$self->{_error_prefix}}, "stdin data encoding failed"]; $self->_encode($enc, @data) if $has_input; return if $self->error; } my $bout = ''; my $berr = ''; my ($fnoout, $fnoerr, $fnoin); local $SIG{PIPE} = 'IGNORE'; MLOOP: while ($cout or $cerr or $cin) { $debug and $debug & 64 and _debug "io3 mloop, cin: " . ($cin || 0) . ", cout: " . ($cout || 0) . ", cerr: " . ($cerr || 0); my ($rv, $wv); if ($cout or $cerr) { $rv = ''; if ($cout) { $fnoout = fileno $out; vec($rv, $fnoout, 1) = 1; } if ($cerr) { $fnoerr = fileno $err; vec($rv, $fnoerr, 1) = 1 } } if ($cin) { $fnoin = fileno $in; $wv = ''; vec($wv, $fnoin, 1) = 1; } my $recalc_vecs; FAST: until ($recalc_vecs) { $debug and $debug & 64 and _debug "io3 fast, cin: " . ($cin || 0) . ", cout: " . ($cout || 0) . ", cerr: " . ($cerr || 0); my ($rv1, $wv1) = ($rv, $wv); my $n = select ($rv1, $wv1, undef, $timeout); if ($n > 0) { if ($cout and vec($rv1, $fnoout, 1)) { my $offset = length $bout; my $read = sysread($out, $bout, 20480, $offset); if ($debug and $debug & 64) { _debug "stdout, bytes read: ", $read, " at offset $offset"; $read and $debug & 128 and _hexdump substr $bout, $offset; } unless ($read) { close $out; undef $cout; $recalc_vecs = 1; last unless $rv =~ /[^\x00]/; } } if ($cerr and vec($rv1, $fnoerr, 1)) { my $read = sysread($err, $berr, 20480, length($berr)); $debug and $debug & 64 and _debug "stderr, bytes read: ", $read; unless ($read) { close $err; undef $cerr; $recalc_vecs = 1; } } if ($cin and vec($wv1, $fnoin, 1)) { my $written = syswrite($in, $data[0], 20480); if ($debug and $debug & 64) { _debug "stdin, bytes written: ", $written; $written and $debug & 128 and _hexdump substr $data[0], 0, $written; } if ($written) { substr($data[0], 0, $written, ''); while (@data) { next FAST if (defined $data[0] and length $data[0]); shift @data; } } close $in; undef $cin; $recalc_vecs = 1; } } else { next if ($n < 0 and $! == Errno::EINTR()); $self->_set_error(OSSH_SLAVE_TIMEOUT, 'ssh slave failed', 'timed out'); last MLOOP; } } } close $out if $cout; close $err if $cerr; close $in if $cin; if ($enc) { local $self->{_error_prefix} = [@{$self->{_error_prefix}}, 'output decoding failed']; unless ($self->_decode($enc, $bout, $berr)) { undef $bout; undef $berr; } } $debug and $debug & 64 and _debug "leaving _io3()"; return ($bout, $berr); } _sub_options spawn => qw(stderr_to_stdout stdin_discard stdin_fh stdin_file stdout_discard stdout_fh stdout_file stderr_discard stderr_fh stderr_file stdinout_dpipe stdinout_dpipe_make_parent quote_args tty ssh_opts tunnel encoding argument_encoding forward_agent); sub spawn { ${^TAINT} and &_catch_tainted_args; my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); _croak_bad_options %opts; return scalar $self->open_ex(\%opts, @_); } _sub_options open2 => qw(stderr_to_stdout stderr_discard stderr_fh stderr_file quote_args tty ssh_opts tunnel encoding argument_encoding forward_agent); sub open2 { ${^TAINT} and &_catch_tainted_args; my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); _croak_bad_options %opts; my ($in, $out, undef, $pid) = $self->open_ex({ stdout_pipe => 1, stdin_pipe => 1, %opts }, @_) or return (); return ($in, $out, $pid); } _sub_options open2pty => qw(stderr_to_stdout stderr_discard stderr_fh stderr_file quote_args tty close_slave_pty ssh_opts encoding argument_encoding forward_agent); sub open2pty { ${^TAINT} and &_catch_tainted_args; my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); _croak_bad_options %opts; my ($pty, undef, undef, $pid) = $self->open_ex({ stdout_pty => 1, stdin_pty => 1, tty => 1, %opts }, @_) or return (); return ($pty, $pid); } _sub_options open2socket => qw(stderr_to_stdout stderr_discard stderr_fh stderr_file quote_args tty ssh_opts tunnel encoding argument_encoding forward_agent); sub open2socket { ${^TAINT} and &_catch_tainted_args; my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); _croak_bad_options %opts; my ($socket, undef, undef, $pid) = $self->open_ex({ stdinout_socket => 1, %opts }, @_) or return (); return ($socket, $pid); } _sub_options open3 => qw(quote_args tty ssh_opts encoding argument_encoding forward_agent); sub open3 { ${^TAINT} and &_catch_tainted_args; my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); _croak_bad_options %opts; my ($in, $out, $err, $pid) = $self->open_ex({ stdout_pipe => 1, stdin_pipe => 1, stderr_pipe => 1, %opts }, @_) or return (); return ($in, $out, $err, $pid); } _sub_options open3pty => qw(quote_args tty close_slave_pty ssh_opts encoding argument_encoding forward_agent); sub open3pty { ${^TAINT} and &_catch_tainted_args; my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); _croak_bad_options %opts; my ($pty, undef, $err, $pid) = $self->open_ex({ stdout_pty => 1, stdin_pty => 1, tty => 1, stderr_pipe => 1, %opts }, @_) or return (); return ($pty, $err, $pid); } _sub_options system => qw(stdout_discard stdout_fh stdin_discard stdout_file stdin_fh stdin_file quote_args stderr_to_stdout stderr_discard stderr_fh stderr_file stdinout_dpipe stdinout_dpipe_make_parent tty ssh_opts tunnel encoding argument_encoding forward_agent); sub system { ${^TAINT} and &_catch_tainted_args; my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); my $stdin_data = delete $opts{stdin_data}; my $timeout = delete $opts{timeout}; my $async = delete $opts{async}; _croak_bad_options %opts; local $SIG{INT} = 'IGNORE'; local $SIG{QUIT} = 'IGNORE'; local $SIG{CHLD}; my $stream_encoding; if (defined $stdin_data) { $opts{stdin_pipe} = 1; $stream_encoding = $self->_delete_stream_encoding(\%opts); } my ($in, undef, undef, $pid) = $self->open_ex(\%opts, @_) or return undef; $self->_io3(undef, undef, $in, $stdin_data, $timeout, $stream_encoding) if defined $stdin_data; return $pid if $async; $self->_waitpid($pid, $timeout); } _sub_options test => qw(stdout_discard stdout_fh stdin_discard stdout_file stdin_fh stdin_file quote_args stderr_to_stdout stderr_discard stderr_fh stderr_file stdinout_dpipe stdinout_dpipe_make_parent tty ssh_opts timeout stdin_data encoding stream_encoding argument_encoding forward_agent); sub test { ${^TAINT} and &_catch_tainted_args; my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); $opts{stdout_discard} = 1 unless grep defined($opts{$_}), qw(stdout_discard stdout_fh stdout_file stdinout_dpipe); $opts{stderr_discard} = 1 unless grep defined($opts{$_}), qw(stderr_discard stderr_fh stderr_file stderr_to_stdout); _croak_bad_options %opts; $self->system(\%opts, @_); my $error = $self->error; unless ($error) { return 1; } if ($error == OSSH_SLAVE_CMD_FAILED) { $self->_set_error(0); return 0; } return undef; } _sub_options capture => qw(stderr_to_stdout stderr_discard stderr_fh stderr_file stdin_discard stdin_fh stdin_file quote_args tty ssh_opts tunnel encoding argument_encoding forward_agent); sub capture { ${^TAINT} and &_catch_tainted_args; my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); my $stdin_data = delete $opts{stdin_data}; my $timeout = delete $opts{timeout}; _croak_bad_options %opts; my $stream_encoding = $self->_delete_stream_encoding(\%opts); $opts{stdout_pipe} = 1; $opts{stdin_pipe} = 1 if defined $stdin_data; local $SIG{INT} = 'IGNORE'; local $SIG{QUIT} = 'IGNORE'; local $SIG{CHLD}; my ($in, $out, undef, $pid) = $self->open_ex(\%opts, @_) or return (); my ($output) = $self->_io3($out, undef, $in, $stdin_data, $timeout, $stream_encoding); $self->_waitpid($pid, $timeout); if (wantarray) { my $pattern = quotemeta $/; return split /(?<=$pattern)/, $output; } $output } _sub_options capture2 => qw(stdin_discard stdin_fh stdin_file quote_args tty ssh_opts encoding argument_encoding forward_agent); sub capture2 { ${^TAINT} and &_catch_tainted_args; my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); my $stdin_data = delete $opts{stdin_data}; my $timeout = delete $opts{timeout}; _croak_bad_options %opts; my $stream_encoding = $self->_delete_stream_encoding(\%opts); $opts{stdout_pipe} = 1; $opts{stderr_pipe} = 1; $opts{stdin_pipe} = 1 if defined $stdin_data; local $SIG{INT} = 'IGNORE'; local $SIG{QUIT} = 'IGNORE'; local $SIG{CHLD}; my ($in, $out, $err, $pid) = $self->open_ex( \%opts, @_) or return (); my @capture = $self->_io3($out, $err, $in, $stdin_data, $timeout, $stream_encoding); $self->_waitpid($pid, $timeout); wantarray ? @capture : $capture[0]; } _sub_options open_tunnel => qw(ssh_opts stderr_discard stderr_fh stderr_file encoding argument_encoding forward_agent); sub open_tunnel { ${^TAINT} and &_catch_tainted_args; my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); $opts{stderr_discard} = 1 unless grep defined $opts{$_}, qw(stderr_discard stderr_fh stderr_file); _croak_bad_options %opts; @_ == 2 or croak 'Usage: $ssh->open_tunnel(\%opts, $host, $port)'; $opts{tunnel} = 1; $self->open2socket(\%opts, @_); } _sub_options capture_tunnel => qw(ssh_opts stderr_discard stderr_fh stderr_file stdin_discard stdin_fh stdin_file stdin_data timeout encoding stream_encoding argument_encoding forward_agent); sub capture_tunnel { ${^TAINT} and &_catch_tainted_args; my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); $opts{stderr_discard} = 1 unless grep defined $opts{$_}, qw(stderr_discard stderr_fh stderr_file); _croak_bad_options %opts; @_ == 2 or croak 'Usage: $ssh->capture_tunnel(\%opts, $host, $port)'; $opts{tunnel} = 1; $self->capture(\%opts, @_); } sub _calling_method { my $method = (caller 2)[3]; $method =~ s/.*:://; $method; } sub _scp_get_args { my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); @_ > 0 or croak 'Usage: $ssh->' . _calling_method . '(\%opts, $remote_fn1, $remote_fn2, ..., $local_fn_or_dir)'; my $glob = delete $opts{glob}; my $target = (@_ > 1 ? pop @_ : '.'); $target =~ m|^[^/]*:| and $target = "./$target"; my $prefix = $self->{_host_squared}; $prefix = "$self->{_user}\@$prefix" if defined $self->{_user}; my @src = map "$prefix:$_", $self->_quote_args({quote_args => 1, glob_quoting => $glob}, @_); ($self, \%opts, $target, @src); } sub scp_get { ${^TAINT} and &_catch_tainted_args; my ($self, $opts, $target, @src) = _scp_get_args @_; $self->_scp($opts, @src, $target); } sub rsync_get { ${^TAINT} and &_catch_tainted_args; my ($self, $opts, $target, @src) = _scp_get_args @_; $self->_rsync($opts, @src, $target); } sub _scp_put_args { my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); @_ > 0 or croak 'Usage: $ssh->' . _calling_method . '(\%opts, $local_fn1, $local_fn2, ..., $remote_dir_or_fn)'; my $glob = delete $opts{glob}; my $glob_flags = ($glob ? delete $opts{glob_flags} || 0 : undef); my $prefix = $self->{_host_squared}; $prefix = "$self->{_user}\@$prefix" if defined $self->{_user}; my $target = $prefix . ':' . ( @_ > 1 ? $self->_quote_args({quote_args => 1}, pop(@_)) : ''); my @src = @_; if ($glob) { require File::Glob; @src = map File::Glob::bsd_glob($_, $glob_flags), @src; unless (@src) { $self->_set_error(OSSH_SLAVE_FAILED, "given file name patterns did not match any file"); return undef; } } $_ = "./$_" for grep m|^[^/]*:|, @src; ($self, \%opts, $target, @src); } sub scp_put { ${^TAINT} and &_catch_tainted_args; my ($self, $opts, $target, @src) = _scp_put_args @_; return unless $self; $self->_scp($opts, @src, $target); } sub rsync_put { ${^TAINT} and &_catch_tainted_args; my ($self, $opts, $target, @src) = _scp_put_args @_; return unless $self; $self->_rsync($opts, @src, $target); } _sub_options _scp => qw(stderr_to_stdout stderr_discard stderr_fh stderr_file stdout_discard stdout_fh stdout_file encoding argument_encoding forward_agent); sub _scp { my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); my $quiet = delete $opts{quiet}; $quiet = 1 unless defined $quiet; my $recursive = delete $opts{recursive}; my $copy_attrs = delete $opts{copy_attrs}; my $bwlimit = delete $opts{bwlimit}; my $async = delete $opts{async}; my $ssh_opts = delete $opts{ssh_opts}; my $timeout = delete $opts{timeout}; my $verbose = delete $opts{verbose}; _croak_bad_options %opts; my @opts; @opts = @$ssh_opts if $ssh_opts; push @opts, '-q' if $quiet; push @opts, '-v' if $verbose; push @opts, '-r' if $recursive; push @opts, '-p' if $copy_attrs; push @opts, '-l', $bwlimit if defined $bwlimit; local $self->{_error_prefix} = [@{$self->{_error_prefix}}, 'scp failed']; my $pid = $self->open_ex({ %opts, _cmd => 'scp', ssh_opts => \@opts, quote_args => 0 }, @_); return $pid if $async; $self->_waitpid($pid, $timeout); } my %rsync_opt_with_arg = map { $_ => 1 } qw(chmod suffix backup-dir rsync-path max-delete max-size min-size partial-dir timeout modify-window temp-dir compare-dest copy-dest link-dest compress-level skip-compress filter exclude exclude-from include include-from out-format log-file log-file-format bwlimit protocol iconv checksum-seed); my %rsync_opt_forbiden = map { $_ => 1 } qw(rsh address port sockopts blocking-io password-file write-batch only-write-batch read-batch ipv4 ipv6 version help daemon config detach files-from from0 blocking-io protect-args list-only); $rsync_opt_forbiden{"no-$_"} = 1 for (keys %rsync_opt_with_arg, keys %rsync_opt_forbiden); my %rsync_error = (1, 'syntax or usage error', 2, 'protocol incompatibility', 3, 'errors selecting input/output files, dirs', 4, 'requested action not supported: an attempt was made to manipulate 64-bit files on a platform '. 'that cannot support them; or an option was specified that is supported by the client and not '. 'by the server.', 5, 'error starting client-server protocol', 6, 'daemon unable to append to log-file', 10, 'error in socket I/O', 11, 'error in file I/O', 12, 'error in rsync protocol data stream', 13, 'errors with program diagnostics', 14, 'error in IPC code', 20, 'received SIGUSR1 or SIGINT', 21, 'some error returned by waitpid()', 22, 'error allocating core memory buffers', 23, 'partial transfer due to error', 24, 'partial transfer due to vanished source files', 25, 'the --max-delete limit stopped deletions', 30, 'timeout in data send/receive', 35, 'timeout waiting for daemon connection'); my %rsync_opt_open_ex = map { $_ => 1 } qw(stderr_to_stdout stderr_discard stderr_fh stderr_file stdout_discard stdout_fh stdout_file encoding argument_encoding); sub _rsync { my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); my $async = delete $opts{async}; my $verbose = delete $opts{verbose}; my $quiet = delete $opts{quiet}; my $copy_attrs = delete $opts{copy_attrs}; my $timeout = delete $opts{timeout}; $quiet = 1 unless (defined $quiet or $verbose); my @opts = qw(--blocking-io) ; push @opts, '-q' if $quiet; push @opts, '-p' if $copy_attrs; push @opts, '-' . ($verbose =~ /^\d+$/ ? 'v' x $verbose : 'v') if $verbose; my %opts_open_ex = ( _cmd => 'rsync', quote_args => 0 ); for my $opt (keys %opts) { my $value = $opts{$opt}; if (defined $value) { if ($rsync_opt_open_ex{$opt}) { $opts_open_ex{$opt} = $value; } else { my $opt1 = $opt; $opt1 =~ tr/_/-/; $rsync_opt_forbiden{$opt1} and croak "forbiden rsync option '$opt' used"; if ($rsync_opt_with_arg{$opt1}) { push @opts, "--$opt1=$_" for _array_or_scalar_to_list($value) } else { $value = !$value if $opt1 =~ s/^no-//; push @opts, ($value ? "--$opt1" : "--no-$opt1"); } } } } local $self->{_error_prefix} = [@{$self->{_error_prefix}}, 'rsync failed']; my $pid = $self->open_ex(\%opts_open_ex, @opts, '--', @_); return $pid if $async; $self->_waitpid($pid, $timeout) and return 1; if ($self->error == OSSH_SLAVE_CMD_FAILED and $?) { my $err = ($? >> 8); my $errstr = $rsync_error{$err}; $errstr = 'Unknown rsync error' unless defined $errstr; my $signal = $? & 255; my $signalstr = ($signal ? " (signal $signal)" : ''); $self->_set_error(OSSH_SLAVE_CMD_FAILED, "command exited with code $err$signalstr: $errstr"); } return undef } _sub_options sftp => qw(autoflush timeout argument_encoding encoding block_size queue_size late_set_perm forward_agent); sub sftp { ${^TAINT} and &_catch_tainted_args; @_ & 1 or croak 'Usage: $ssh->sftp(%sftp_opts)'; _load_module('Net::SFTP::Foreign', '1.47'); my ($self, %opts) = @_; my $stderr_fh = delete $opts{stderr_fh}; my $stderr_discard = delete $opts{stderr_discard}; my $fs_encoding = _first_defined(delete $opts{fs_encoding}, $opts{argument_encoding}, $opts{encoding}, $self->{_default_argument_encoding}); undef $fs_encoding if (defined $fs_encoding and $fs_encoding eq 'bytes'); _croak_bad_options %opts; $opts{timeout} = $self->{_timeout} unless defined $opts{timeout}; $self->wait_for_master or return undef; my ($in, $out, $pid) = $self->open2( { ssh_opts => '-s', stderr_fh => $stderr_fh, stderr_discard => $stderr_discard }, 'sftp' ) or return undef; my $sftp = Net::SFTP::Foreign->new(transport => [$out, $in, $pid], dirty_cleanup => 0, fs_encoding => $fs_encoding, %opts); if ($sftp->error) { $self->_or_set_error(OSSH_SLAVE_SFTP_FAILED, "unable to create SFTP client", $sftp->error); return undef; } $sftp } _sub_options sshfs_import => qw(stderr_discard stderr_fh stderr_file ssh_opts argument_encoding sshfs_opts); sub sshfs_import { ${^TAINT} and &_catch_tainted_args; my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); @_ == 2 or croak 'Usage: $ssh->sshfs_import(\%opts, $remote, $local)'; my ($from, $to) = @_; my @sshfs_opts = ( -o => 'slave', _array_or_scalar_to_list delete $opts{sshfs_opts} ); _croak_bad_options %opts; $opts{ssh_opts} = ['-s', _array_or_scalar_to_list delete $opts{ssh_opts}]; $opts{stdinout_dpipe} = [$self->{_sshfs_cmd}, "$self->{_host_squared}:$from", $to, @sshfs_opts]; $opts{stdinout_dpipe_make_parent} = 1; $self->spawn(\%opts, 'sftp'); } _sub_options sshfs_export => qw(stderr_discard stderr_fh stderr_file ssh_opts argument_encoding sshfs_opts); sub sshfs_export { ${^TAINT} and &_catch_tainted_args; my $self = shift; my %opts = (ref $_[0] eq 'HASH' ? %{shift()} : ()); @_ == 2 or croak 'Usage: $ssh->sshfs_export(\%opts, $local, $remote)'; my ($from, $to) = @_; my @sshfs_opts = ( -o => 'slave', _array_or_scalar_to_list delete $opts{sshfs_opts} ); _croak_bad_options %opts; $opts{stdinout_dpipe} = $self->{_sftp_server_cmd}; my $hostname = eval { require Sys::Hostname; Sys::Hostname::hostname(); }; $hostname = 'remote' if (not defined $hostname or not length $hostname or $hostname=~/^localhost\b/); $self->spawn(\%opts, $self->{_sshfs_cmd}, "$hostname:$from", $to, @sshfs_opts); } sub DESTROY { my $self = shift; my $pid = $self->{_pid}; local ($@, $SIG{__DIE__}); $debug and $debug & 2 and _debug("DESTROY($self, pid: ", $pid, ")"); if ($pid and $self->{_perl_pid} == $$ and $self->{_thread_generation} == $thread_generation) { $debug and $debug & 32 and _debug("killing master"); local ($?, $!); unless ($self->{_wfm_state}) { # we have successfully created the master connection so we # can send control commands: $debug and $debug & 32 and _debug("sending exit control to master"); $self->_master_ctl('exit'); } $self->_kill_master; } } 1; __END__ =head1 NAME Net::OpenSSH - Perl SSH client package implemented on top of OpenSSH =head1 SYNOPSIS use Net::OpenSSH; my $ssh = Net::OpenSSH->new($host); $ssh->error and die "Couldn't establish SSH connection: ". $ssh->error; $ssh->system("ls /tmp") or die "remote command failed: " . $ssh->error; my @ls = $ssh->capture("ls"); $ssh->error and die "remote ls command failed: " . $ssh->error; my ($out, $err) = $ssh->capture2("find /root"); $ssh->error and die "remote find command failed: " . $ssh->error; my ($rin, $pid) = $ssh->pipe_in("cat >/tmp/foo") or die "pipe_in method failed: " . $ssh->error; print $rin, "hello\n"; close $rin; my ($rout, $pid) = $ssh->pipe_out("cat /tmp/foo") or die "pipe_out method failed: " . $ssh->error; while (<$rout>) { print } close $rout; my ($in, $out ,$pid) = $ssh->open2("foo"); my ($pty, $pid) = $ssh->open2pty("foo"); my ($in, $out, $err, $pid) = $ssh->open3("foo"); my ($pty, $err, $pid) = $ssh->open3pty("login"); my $sftp = $ssh->sftp(); $sftp->error and die "SFTP failed: " . $sftp->error; =head1 DESCRIPTION Net::OpenSSH is a secure shell client package implemented on top of OpenSSH binary client (C). =head2 Under the hood This package is implemented around the multiplexing feature found in later versions of OpenSSH. That feature allows reuse of a previous SSH connection for running new commands (I believe that OpenSSH 4.1 is the first one to provide all the required functionality). When a new Net::OpenSSH object is created, the OpenSSH C client is run in master mode, establishing a permanent (actually, for the lifetime of the object) connection to the server. Then, every time a new operation is requested a new C process is started in slave mode, effectively reusing the master SSH connection to send the request to the remote side. =head2 Net::OpenSSH Vs Net::SSH::.* modules Why should you use Net::OpenSSH instead of any of the other Perl SSH clients available? Well, this is my (biased) opinion: L is not well maintained nowadays (update: a new maintainer has stepped in so this situation could change!!!), requires a bunch of modules (some of them very difficult to install) to be acceptably efficient and has an API that is limited in some ways. L is much better than Net::SSH::Perl, but not completely stable yet. It can be very difficult to install on some specific operative systems and its API is also limited, in the same way as L. Using L, in general, is a bad idea. Handling interaction with a shell via Expect in a generic way just can not be reliably done. Net::SSH is just a wrapper around any SSH binary commands available on the machine. It can be very slow as they establish a new SSH connection for every operation performed. In comparison, Net::OpenSSH is a pure perl module that doesn't have any mandatory dependencies (obviously, besides requiring OpenSSH binaries). Net::OpenSSH has a very perlish interface. Most operations are performed in a fashion very similar to that of the Perl builtins and common modules (i.e. L). It is also very fast. The overhead introduced by launching a new ssh process for every operation is not appreciable (at least on my Linux box). The bottleneck is the latency intrinsic to the protocol, so Net::OpenSSH is probably as fast as an SSH client can be. Being based on OpenSSH is also an advantage: a proved, stable, secure (to paranoic levels), interoperable and well maintained implementation of the SSH protocol is used. On the other hand, Net::OpenSSH does not work on Windows, not even under Cygwin. Net::OpenSSH specifically requires the OpenSSH SSH client (AFAIK, the multiplexing feature is not available from any other SSH client). However, note that it will interact with any server software, not just servers running OpenSSH C. For password authentication, L has to be installed. Other modules and binaries are also required to implement specific functionality (for instance L, L or L). Net::OpenSSH and Net::SSH2 do not support version 1 of the SSH protocol. =head1 API =head2 Optional arguments Almost all methods in this package accept as first argument an optional reference to a hash containing parameters (C<\%opts>). For instance, these two method calls are equivalent: my $out1 = $ssh->capture(@cmd); my $out2 = $ssh->capture({}, @cmd); =head2 Error handling Most methods return undef (or an empty list) to indicate failure. The L method can always be used to explicitly check for errors. For instance: my ($output, $errput) = $ssh->capture2({timeout => 1}, "find /"); $ssh->error and die "ssh failed: " . $ssh->error; =head2 Net::OpenSSH methods These are the methods provided by the package: =over 4 =item Net::OpenSSH->new($host, %opts) Creates a new SSH master connection C<$host> can be a hostname or an IP address. It may also contain the name of the user, her password and the TCP port number where the server is listening: my $ssh1 = Net::OpenSSH->new('jack@foo.bar.com'); my $ssh2 = Net::OpenSSH->new('jack:secret@foo.bar.com:10022'); my $ssh3 = Net::OpenSSH->new('jsmith@2001:db8::1428:57ab'); # IPv6 IPv6 addresses may optionally be enclosed in brackets: my $ssh4 = Net::OpenSSH->new('jsmith@[::1]:1022'); This method always succeeds in returning a new object. Error checking has to be performed explicitly afterwards: my $ssh = Net::OpenSSH->new($host, %opts); $ssh->error and die "Can't ssh to $host: " . $ssh->error; If you have problems getting Net::OpenSSH to connect to the remote host read the troubleshooting chapter near the end of this document. Accepted options: =over 4 =item user => $user_name Login name =item port => $port TCP port number where the server is running =item passwd => $passwd =item password => $passwd User given password for authentication. Note that using password authentication in automated scripts is a very bad idea. When possible, you should use public key authentication instead. =item passphrase => $passphrase XUses given passphrase to open private key. =item key_path => $private_key_path Uses the key stored on the given file path for authentication. =item gateway => $gateway If the given argument is a gateway object as returned by L method, use it to connect to the remote host. If it is a hash reference, call the C method first. For instance, the following code fragments are equivalent: my $gateway = Net::OpenSSH::Gateway->find_gateway( proxy => 'http://proxy.corporate.com'); $ssh = Net::OpenSSH->new($host, gateway => $gateway); and $ssh = Net::OpenSSH->new($host, gateway => { proxy => 'http://proxy.corporate.com'}); =item proxy_command => $proxy_command Use the given command to establish the connection to the remote host (see C on L). =item batch_mode => 1 Disables querying the user for password and passphrases. =item ctl_dir => $path Directory where the SSH master control socket will be created. This directory and its parents must be writable only by the current effective user or root, otherwise the connection will be aborted to avoid insecure operation. By default C<~/.libnet-openssh-perl> is used. =item ssh_cmd => $cmd Name or full path to OpenSSH C binary. For instance: my $ssh = Net::OpenSSH->new($host, ssh_cmd => '/opt/OpenSSH/bin/ssh'); =item scp_cmd => $cmd Name or full path to OpenSSH C binary. By default it is inferred from the C one. =item rsync_cmd => $cmd Name or full path to C binary. Defaults to C. =item timeout => $timeout Maximum acceptable time that can elapse without network traffic or any other event happening on methods that are not immediate (for instance, when establishing the master SSH connection or inside methods C, C, C, etc.). See also L. =item kill_ssh_on_timeout => 1 This option tells Net::OpenSSH to kill the local slave SSH process when some operation times out. See also L. =item strict_mode => 0 By default, the connection will be aborted if the path to the socket used for multiplexing is found to be non-secure (for instance, when any of the parent directories is writable by other users). This option can be used to disable that feature. Use with care!!! =item async => 1 By default, the constructor waits until the multiplexing socket is available. That option can be used to defer the waiting until the socket is actually used. For instance, the following code connects to several remote machines in parallel: my (%ssh, %ls); # multiple connections are stablished in parallel: for my $host (@hosts) { $ssh{$host} = Net::OpenSSH->new($host, async => 1); } # then to run some command in all the hosts (sequentially): for my $host (@hosts) { $ssh{$host}->system('ls /'); } =item master_opts => [...] Additional options to pass to the C command when establishing the master connection. For instance: my $ssh = Net::OpenSSH->new($host, master_opts => [-o => "ProxyCommand corkscrew httpproxy 8080 $host"]); =item default_ssh_opts => [...] Default slave SSH command line options for L and derived methods. For instance: my $ssh = Net::OpenSSH->new($host, default_ssh_opts => [-o => "ConnectionAttempts=0"]); =item forward_agent => 1 Enables forwarding of the authentication agent. This option can not be used when passing a passphrase (via L) to unlock the login private key. =item default_stdin_fh => $fh =item default_stdout_fh => $fh =item default_stderr_fh => $fh Default I/O streams for L and derived methods (currently, that means any method but L and L and I plan to remove those exceptions soon!). For instance: open my $stderr_fh, '>>', '/tmp/$host.err' or die ...; open my $stdout_fh, '>>', '/tmp/$host.log' or die ...; my $ssh = Net::OpenSSH->new($host, default_stderr_fh => $stderr_fh, default_stdout_fh => $stdout_fh); $ssh->error and die "SSH connection failed: " . $ssh->error; $ssh->scp_put("/foo/bar*", "/tmp") or die "scp failed: " . $ssh->error; =item default_stdin_file = $fn =item default_stdout_file = $fn =item default_stderr_file = $fn Opens the given filenames and use it as the defaults. =item master_stdout_fh => $fh =item master_stderr_fh => $fh Redirect corresponding stdio streams of the master SSH process to given filehandles. =item master_stdout_discard => $bool =item master_stderr_discard => $bool Discard corresponding stdio streams. =item expand_vars => $bool Activates variable expansion inside command arguments and file paths. See L below. =item vars => \%vars Initial set of variables. =item external_master => 1 Instead of launching a new OpenSSH client in master mode, the module tries to reuse an already existent one. C must also be passed when this option is set. See also L. Example: $ssh = Net::OpenSSH->new('foo', external_master => 1, ctl_path = $path); =item default_encoding => $encoding =item default_stream_encoding => $encoding =item default_argument_encoding => $encoding Set default encodings. See L. =item login_handler => \&custom_login_handler Some remote SSH server may require a custom login/authentication interaction not natively supported by Net::OpenSSH. In that cases, you can use this option to replace the default login logic. The callback will be invoked repeatly as C where C<$ssh> is the current Net::OpenSSH object, C a L object attached to the slave C process tty and C<$data> a reference to an scalar you can use at will. The login handler must return 1 after the login process has completed successfully or 0 in case it still needs to do something else. If some error happens, it must die. Note, that blocking operations should not be performed inside the login handler (at least if you want the C and C features to work). See also the sample script C in the C directory. Usage of this option is incompatible with the C and C options, you will have to handle password or passphrases from the custom handler yourself. =back =item $ssh->error Returns the error condition for the last performed operation. The returned value is a dualvar as $! (see L) that renders an informative message when used in string context or an error number in numeric context (error codes appear in L). =item $ssh->get_user =item $ssh->get_host =item $ssh->get_port Return the corresponding SSH login parameters. =item $ssh->get_ctl_path XReturns the path to the socket where the OpenSSH master process listens for new multiplexed connections. =item ($in, $out, $err, $pid) = $ssh->open_ex(\%opts, @cmd) XI That method starts the command C<@cmd> on the remote machine creating new pipes for the IO channels as specified on the C<%opts> hash. If C<@cmd> is omitted, the remote user shell is run. Returns four values, the first three (C<$in>, C<$out> and C<$err>) correspond to the local side of the pipes created (they can be undef) and the fourth (C<$pid>) to the PID of the new SSH slave process. An empty list is returned on failure. Note that C has to be used afterwards to reap the slave SSH process. Accepted options: =over 4 =item stdin_pipe => 1 Creates a new pipe and connects the reading side to the stdin stream of the remote process. The writing side is returned as the first value (C<$in>). =item stdin_pty => 1 Similar to C, but instead of a regular pipe it uses a pseudo-tty (pty). Note that on some OSs (i.e. HP-UX, AIX), ttys are not reliable. They can overflow when large chunks are written or when data is written faster than it is read. =item stdin_fh => $fh Duplicates C<$fh> and uses it as the stdin stream of the remote process. =item stdin_file => $filename =item stdin_file => \@open_args Opens the file of the given name for reading and uses it as the remote process stdin stream. If an array reference is passed its contents are used as the arguments for the underlying open call. For instance: $ssh->system({stdin_file => ['-|', 'gzip -c -d file.gz']}, $rcmd); =item stdin_discard => 1 Uses /dev/null as the remote process stdin stream. =item stdout_pipe => 1 Creates a new pipe and connects the writing side to the stdout stream of the remote process. The reading side is returned as the second value (C<$out>). =item stdout_pty => 1 Connects the stdout stream of the remote process to the pseudo-pty. This option requires C to be also set. =item stdout_fh => $fh Duplicates C<$fh> and uses it as the stdout stream of the remote process. =item stdout_file => $filename =item stdout_file => \@open_args Opens the file of the given filename and redirect stdout there. =item stdout_discard => 1 Uses /dev/null as the remote process stdout stream. =item stdinout_socket => 1 Creates a new socketpair, attachs the stdin an stdout streams of the slave SSH process to one end and returns the other as the first value (C<$in>) and undef for the second (C<$out>). Example: my ($socket, undef, undef, $pid) = $ssh->open_ex({stdinout_socket => 1}, '/bin/netcat $dest'); See also L. =item stdinout_dpipe => $cmd =item stdinout_dpipe => \@cmd Runs the given command locally attaching its stdio streams to those of the remote SSH command. Conceptually it is equivalent to the L shell command. =item stderr_pipe => 1 Creates a new pipe and connects the writing side to the stderr stream of the remote process. The reading side is returned as the third value (C<$err>). Example: my $pid = $ssh->open_ex({stdinout_dpipe => 'vncviewer -stdio'}, x11vnc => '-inetd'); =item stderr_fh => $fh Duplicates C<$fh> and uses it as the stderr stream of the remote process. =item stderr_file => $filename Opens the file of the given name and redirects stderr there. =item stderr_to_stdout => 1 Makes stderr point to stdout. =item tty => $bool Tells ssh to allocate a pseudo-tty for the remote process. By default, a tty is allocated if remote command stdin stream is attached to a tty. When this flag is set and stdin is not attached to a tty, the ssh master and slave processes may generate spurious warnings about failed tty operations. This is caused by a bug present in older versions of OpenSSH. =item close_slave_pty => 0 When a pseudo pty is used for the stdin stream, the slave side is automatically closed on the parent process after forking the ssh command. This option dissables that feature, so that the slave pty can be accessed on the parent process as C<$pty-Eslave>. It will have to be explicitly closed (see L) =item quote_args => $bool See L below. =item forward_agent => $bool Enables/disables forwarding of the authentication agent. This option can only be used when agent forwarding has been previously requested on the constructor. =item ssh_opts => \@opts List of extra options for the C command. This feature should be used with care, as the given options are not checked in any way by the module, and they could interfere with it. =item tunnel => $bool Instead of executing a command in the remote host, this option instruct Net::OpenSSH to create a TCP tunnel. The arguments become the target IP and port. Example: my ($in, $out, undef, $pid) = $ssh->open_ex({tunnel => 1}, $IP, $port); See also L. =item encoding => $encoding =item argument_encoding => $encoding Set encodings. See L. =back Usage example: # similar to IPC::Open2 open2 function: my ($in_pipe, $out_pipe, undef, $pid) = $ssh->open_ex( { stdin_pipe => 1, stdout_pipe => 1 }, @cmd ) or die "open_ex failed: " . $ssh->error; # do some IO through $in/$out # ... waitpid($pid); =item $ssh->system(\%opts, @cmd) Runs the command C<@cmd> on the remote machine. Returns true on sucess, undef otherwise. The error status is set to C when the remote command exits with a non zero code (the code is available from C<$?>, see L). Example: $ssh->system('ls -R /') or die "ls failed: " . $ssh->error"; As for C builtin, C and C signals are blocked. (see L). Also, setting C<$SIG{CHLD}> to C or to a custom signal handler will interfere with this method. Accepted options: =over 4 =item stdin_data => $input =item stdin_data => \@input Sends the given data through the stdin stream to the remote process. For example, the following code creates a file on the remote side: $ssh->system({stdin_data => \@data}, "cat >/tmp/foo") or die "unable to write file: " . $ssh->error; =item timeout => $timeout The operation is aborted after C<$timeout> seconds elapsed without network activity. See also L. =item async => 1 Does not wait for the child process to exit. The PID of the new process is returned. Note that when this option is combined with C, the given data will be transferred to the remote side before returning control to the caller. See also the L method documentation below. =item stdin_fh => $fh =item stdin_discard => $bool =item stdout_fh => $fh =item stdout_discard => $bool =item stderr_fh => $fh =item stderr_discard => $bool =item stderr_to_stdout => $bool =item stdinout_dpipe => $cmd =item tty => $bool See the L method documentation for an explanation of these options. =back =item $ok = $ssh->test(\%opts, @cmd); Runs the given command and returns its success/failure exit status as 1 or 0 respectively. Returns undef when something goes wrong in the SSH layer. Error status is not set to OSSH_SLAVE_CMD_FAILED when the remote command exits with a non-zero code. By default this method discards the remote command C and C streams. Usage example: if ($ssh->test(ps => -C => $executable)) { say "$executable is running on remote machine" } else { die "something got wrong: ". $ssh->error if $ssh->error; say "$executable is not running on remote machine" } This method support the same set of options as C, except C and C. =item $output = $ssh->capture(\%opts, @cmd); =item @output = $ssh->capture(\%opts, @cmd); This method is conceptually equivalent to the perl backquote operator (i.e. C<`ls`>): it runs the command on the remote machine and captures its output. In scalar context returns the output as a scalar. In list context returns the output broken into lines (it honors C<$/>, see L). The exit status of the remote command is returned in C<$?>. When an error happens while capturing (for instance, the operation times out), the partial captured output will be returned. Error conditions have to be explicitly checked using the L method. For instance: my $output = $ssh->capture({ timeout => 10 }, "echo hello; sleep 20; echo bye"); $ssh->error and warn "operation didn't complete successfully: ". $ssh->error; print $output; Setting C<$SIG{CHLD}> to a custom signal handler or to C will interfere with this method. Accepted options: =over 4 =item stdin_data => $input =item stdin_data => \@input =item timeout => $timeout See L. =item stdin_fh => $fh =item stdin_discard => $bool =item stderr_fh => $fh =item stderr_discard => $bool =item stderr_to_stdout => $bool =item tty => $bool See the L method documentation for an explanation of these options. =back =item ($output, $errput) = $ssh->capture2(\%opts, @cmd) captures the output sent to both stdout and stderr by C<@cmd> on the remote machine. Setting C<$SIG{CHLD}> to a custom signal handler or to C will also interfere with this method. The accepted options are: =over 4 =item stdin_data => $input =item stdin_data => \@input See the L method documentation for an explanation of these options. =item timeout => $timeout See L. =item stdin_fh => $fh =item stdin_discard => $bool =item tty => $bool See the L method documentation for an explanation of these options. =back =item ($in, $pid) = $ssh->pipe_in(\%opts, @cmd) XThis method is similar to the following Perl C call $pid = open $in, '|-', @cmd but running @cmd on the remote machine (see L). No options are currently accepted. There is no need to perform a waitpid on the returned PID as it will be done automatically by perl when C<$in> is closed. Example: my ($in, $pid) = $ssh->pipe_in('cat >/tmp/fpp') or die "pipe_in failed: " . $ssh->error; print $in $_ for @data; close $in or die "close failed"; =item ($out, $pid) = $ssh->pipe_out(\%opts, @cmd) XReciprocal to previous method, it is equivalent to $pid = open $out, '-|', @cmd running @cmd on the remote machine. No options are currently accepted. =item ($in, $out, $pid) = $ssh->open2(\%opts, @cmd) =item ($pty, $pid) = $ssh->open2pty(\%opts, @cmd) =item ($socket, $pid) = $ssh->open2socket(\%opts, @cmd) =item ($in, $out, $err, $pid) = $ssh->open3(\%opts, @cmd) =item ($pty, $err, $pid) = $ssh->open3pty(\%opts, @cmd) Shortcuts around L method. =item $pid = $ssh->spawn(\%opts, @_) XAnother L shortcut, it launches a new remote process in the background and returns the PID of the local slave SSH process. At some later point in your script, C should be called on the returned PID in order to reap the slave SSH process. For instance, you can run some command on several hosts in parallel with the following code: my %conn = map { $_ => Net::OpenSSH->new($_, async => 1) } @hosts; my @pid; for my $host (@hosts) { open my($fh), '>', "/tmp/out-$host.txt" or die "unable to create file: $!"; push @pid, $conn{$host}->spawn({stdout_fh => $fh}, $cmd); } waitpid($_, 0) for @pid; Note that C shouldn't be used to start detached remote processes that may survive the local program (see also the L about running remote processes detached). =item ($socket, $pid) = $ssh->open_tunnel(\%opts, $dest_host, $port) XSimilar to L, but instead of running a command, it opens a TCP tunnel to the given address. See also L. =item $out = $ssh->capture_tunnel(\%opts, $dest_host, $port) =item @out = $ssh->capture_tunnel(\%opts, $dest_host, $port) XSimilar to L, but instead of running a command, it opens a TCP tunnel. Example: $out = $ssh->capture_tunnel({stdin_data => join("\r\n", "GET / HTTP/1.0", "Host: www.perl.org", "", "") }, 'www.perl.org', 80) See also L. =item $ssh->scp_get(\%opts, $remote1, $remote2,..., $local_dir_or_file) =item $ssh->scp_put(\%opts, $local, $local2,..., $remote_dir_or_file) These two methods are wrappers around the C command that allow transfers of files to/from the remote host using the existing SSH master connection. When transferring several files, the target argument must point to an existing directory. If only one file is to be transferred, the target argument can be a directory or a file name or can be ommited. For instance: $ssh->scp_get({glob => 1}, '/var/tmp/foo*', '/var/tmp/bar*', '/tmp'); $ssh->scp_put('/etc/passwd'); Both L and L methods return a true value when all the files are transferred correctly, otherwise they return undef. Accepted options: =over 4 =item quiet => 0 By default, C is called with the quiet flag C<-q> enabled in order to suppress progress information. This option allows one to reenable the progress indication bar. =item verbose => 1 Calls C with the C<-v> flag. =item recursive => 1 Copy files and directories recursively. =item glob => 1 Allow expansion of shell metacharacters in the sources list so that wildcards can be used to select files. =item glob_flags => $flags Second argument passed to L function. Only available for L method. =item copy_attrs => 1 Copies modification and access times and modes from the original files. =item bwlimit => $Kbits Limits the used bandwith, specified in Kbit/s. =item timeout => $secs The transfer is aborted if the connection does not finish before the given timeout elapses. See also L. =item async => 1 Doesn't wait for the C command to finish. When this option is used, the method returns the PID of the child C process. For instance, it is possible to transfer files to several hosts in parallel as follows: use Errno; my (%pid, %ssh); for my $host (@hosts) { $ssh{$host} = Net::OpenSSH->new($host, async => 1); } for my $host (@hosts) { $pid{$host} = $ssh{$host}->scp_put({async => 1}, $local_fn, $remote_fn) or warn "scp_put to $host failed: " . $ssh{$host}->error . "\n"; } for my $host (@hosts) { if (my $pid = $pid{$host}) { if (waitpid($pid, 0) > 0) { my $exit = ($? >> 8); $exit and warn "transfer of file to $host failed ($exit)\n"; } else { redo if ($! == EINTR); warn "waitpid($pid) failed: $!\n"; } } } =item stdout_fh => $fh =item stderr_fh => $fh =item stderr_to_stdout => 1 These options are passed unchanged to method L, allowing capture of the output of the C program. Note that C will not generate progress reports unless its stdout stream is attached to a tty. =back =item $ssh->rsync_get(\%opts, $remote1, $remote2,..., $local_dir_or_file) =item $ssh->rsync_put(\%opts, $local1, $local2,..., $remote_dir_or_file) These methods use C over SSH to transfer files from/to the remote machine. They accept the same set of options as the SCP ones. Any unrecognized option will be passed as an argument to the C command (see L). Underscores can be used instead of dashes in C option names. For instance: $ssh->rsync_get({exclude => '*~', verbose => 1, safe_links => 1}, '/remote/dir', '/local/dir'); =item $sftp = $ssh->sftp(%sftp_opts) Creates a new L object for SFTP interaction that runs through the ssh master connection. =item @call = $ssh->make_remote_command(\%opts, @cmd) =item $call = $ssh->make_remote_command(\%opts, @cmd) This method returns the arguments required to execute a command on the remote machine via SSH. For instance: my @call = $ssh->make_remote_command(ls => "/var/log"); system @call; In scalar context, returns the arguments quoted and joined into one string: my $remote = $ssh->make_remote_comand("cd /tmp/ && tar xf -"); system "tar cf - . | $remote"; The options accepted are as follows: =over 4 =item tty => $bool Enables/disables allocation of a tty on the remote side. =item forward_agent => $bool Enables/disables forwarding of authentication agent. This option can only be used when agent forwarding has been previously requested on the constructor. =item tunnel => 1 Return a command to create a connection to some TCP server reachable from the remote host. In that case the arguments are the destination address and port. For instance: $cmd = $ssh->make_remote_command({tunnel => 1}, $host, $port); =back =item $ssh->wait_for_master($async) When the connection has been established by calling the constructor with the C option, this call allows one to advance the process. If C<$async> is true, it will perform any work that can be done inmediately without waiting (for instance, entering the password or checking for the existence of the multiplexing socket) and then return. If a false value is given, it will finalize the connection process and wait until the multiplexing socket is available. It returns a true value after the connection has been successfully established. False is returned if the connection process fails or if it has not yet completed (then, the L method can be used to distinguish between both cases). =item $ssh->check_master This method runs several checks to ensure that the master connection is still alive. =item $ssh->shell_quote(@args) Returns the list of arguments quoted so that they will be restored to their original form when parsed by the remote shell. In scalar context returns the list of arguments quoted and joined. Usually this task is done automatically by the module. See L below. This method can also be used as a class method. Example: my $quoted_args = Net::OpenSSH->shell_quote(@args); system('ssh', '--', $host, $quoted_args); =item $ssh->shell_quote_glob(@args) This method is like the previous C but leaves wildcard characters unquoted. It can be used as a class method also. =item $ssh->set_expand_vars($bool) Enables/disables variable expansion feature (see L). =item $ssh->get_expand_vars Returns current state of variable expansion feature. =item $ssh->set_var($name, $value) =item $ssh->get_var($name, $value) These methods allow to change and to retrieve the value of the logical value of the given name. =item $ssh->get_master_pid Returns the PID of the master SSH process =item $ssh->master_exited This methods allows one to tell the module that the master process has exited when we get its PID from some external wait or waitpid call. For instance: my $ssh = Net::OpenSSH->new('foo', async => 1); # create new processes # ... # rip them... my $master_pid = $ssh->master_pid; while ((my $pid = wait) > 0) { if ($pid == $master_pid) { $ssh->master_exited; } } If your program rips the master process and this method is not called, the OS could reassign the PID to a new unrelated process and the module would try to kill it at object destruction time. =item $pid = $ssh->sshfs_import(\%opts, $remote_fs, $local_mnt_point) =item $pid = $ssh->sshfs_export(\%opts, $local_fs, $remote_mnt_point) These methods use L to import or export a file system through the SSH connection. They return the C<$pid> of the C process or of the slave C process used to proxy it. Killing that process unmounts the file system, though, it may be probably better to use L. The options acepted are as follows: =over =item ssh_opts => \@ssh_opts Options passed to the slave C process. =item sshfs_opts => \@sshfs_opts Options passed to the C command. For instance, to mount the file system in read-only mode: my $pid = $ssh->sshfs_export({sshfs_opts => [-o => 'ro']}, "/", "/mnt/foo"); =back Note that this command requires a recent version of C to work (at the time of writing, it requires the yet unreleased version available from the FUSE git repository!). See also the L man page and the C and FUSE web sites at L and L respectively. =back =head2 Shell quoting By default, when invoking remote commands, this module tries to mimic perl C builtin in regard to argument processing. Quoting L: Argument processing varies depending on the number of arguments. If there is more than one argument in LIST, or if LIST is an array with more than one value, starts the program given by the first element of the list with arguments given by the rest of the list. If there is only one scalar argument, the argument is checked for shell metacharacters, and if there are any, the entire argument is passed to the system's command shell for parsing (this is "/bin/sh -c" on Unix platforms, but varies on other platforms). Take for example Net::OpenSSH L method: $ssh->system("ls -l *"); $ssh->system('ls', '-l', '/'); The first call passes the argument unchanged to ssh and it is executed in the remote side through the shell which interprets metacharacters. The second call escapes any shell metacharacters so that, effectively, it is equivalent to calling the command directly and not through the shell. Under the hood, as the Secure Shell protocol does not provide for this mode of operation and always spawns a new shell where it runs the given command, Net::OpenSSH quotes any shell metacharacters in the command list. All the methods that invoke a remote command (system, open_ex, etc.) accept the option C that allows one to force/disable shell quoting. For instance: $ssh->system({quote_args => 1}, "/path with spaces/bin/foo"); will correctly handle the spaces in the program path. The shell quoting mechanism implements some extensions (for instance, performing redirections to /dev/null on the remote side) that can be dissabled with the option C: $ssh->system({ stderr_discard => 1, quote_args => 1, quote_args_extended => 0 }, @cmd); The option C can also be used to disable quoting when more than one argument is passed. For instance, to get some pattern expanded by the remote shell: $ssh->system({quote_args => 0}, 'ls', '-l', "/tmp/files_*.dat"); The method C can be used to selectively quote some arguments and leave others untouched: $ssh->system({quote_args => 0}, $ssh->shell_quote('ls', '-l'), "/tmp/files_*.dat"); When the glob option is set in scp and rsync file transfer methods, an alternative quoting method that knows about file wildcards and passes them unquoted is used. The set of wildcards recognized currently is the one supported by L. Another way to selectively use quote globing or fully disable quoting for some specific arguments is to pass them as scalar references or double scalar references respectively. In practice, that means prepending them with one or two backslashes. For instance: # quote the last argument for globing: $ssh->system('ls', '-l', \'/tmp/my files/filed_*dat'); # append a redirection to the remote command $ssh->system('ls', '-lR', \\'>/tmp/ls-lR.txt'); # expand remote shell variables and glob in the same command: $ssh->system('tar', 'czf', \\'$HOME/out.tgz', \'/var/log/server.*.log'); As shell quoting is a tricky matter, I expect bugs to appear in this area. You can see how C is called, and the quoting used setting the following debug flag: $Net::OpenSSH::debug |= 16; Also, the current shell quoting implementation expects a shell compatible with Unix C in the remote side. It will not work as expected if for instance, the remote machine runs Windows, VMS or it is a router. As a workaround, do any required quoting yourself and pass the quoted command as a string so that no further quoting is performed. For instance: # for VMS $ssh->system('DIR/SIZE NFOO::USERS:[JSMITH.DOCS]*.TXT;0'); I plan to add support for different quoting mechanisms in the future... if you need it now, just ask for it!!! The current quoting mechanism does not handle possible aliases defined by the remote shell. In that case, to force execution of the command instead of the alias, the full path to the command must be used. =head2 Timeouts In order to stop remote processes when they timeout, the ideal aproach would be to send them signals through the SSH connection as specified by the protocol standard. Unfortunately OpenSSH does not implement that feature so Net::OpenSSH has to use other imperfect approaches: =over 4 =item * close slave I/O streams Closing the STDIN and STDOUT streams of the unresponsive remote process will effectively deliver a SIGPIPE when it tries to access any of them. Remote processes may not access STDIN or STDOUT and even them, Net::OpenSSH can only close these channels when it is capturing them, so this approach does not always work. =item * killing the local SSH slave process This action may leave the remote process running, creating a remote orphan so Net::OpenSSH does not use it unless the construction option C is set. =back Luckily, future versions of OpenSSH will support signaling remote processes via the mux channel. =head2 Variable expansion The variable expansion feature allows one to define variables that are expanded automatically inside command arguments and file paths. This feature is disabled by default. It is intended to be used with L and other similar modules. Variables are delimited by a pair of percent signs (C<%>), for instance C<%HOST%>. Also, two consecutive percent signs are replaced by a single one. The special variables C, C and C are maintained internally by the module and take the obvious values. Variable expansion is performed before shell quoting (see L). Some usage example: my $ssh = Net::OpenSSH->new('server.foo.com', expand_vars => 1); $ssh->set_var(ID => 42); $ssh->system("ls >/tmp/ls.out-%HOST%-%ID%"); will redirect the output of the C command to C on the remote host. =head2 Tunnels Besides running commands on the remote host, Net::OpenSSH also allows one to tunnel TCP connections to remote machines reachable from the SSH server. That feature is made available through the C option of the L method, and also through wrapper methods L and L and most others where it makes sense. Example: $ssh->system({tunnel => 1, stdin_data => "GET / HTTP/1.0\r\n\r\n", stdout_file => "/tmp/$server.res"}, $server, 80) or die "unable to retrieve page: " . $ssh->error; or capturing the output of several requests in parallel: my @pids; for (@servers) { my $pid = $ssh->spawn({tunnel => 1, stdin_file => "/tmp/request.req", stdout_file => "/tmp/$_.res"}, $_, 80); if ($pid) { push @pids, $pid; } else { warn "unable to spawn tunnel process to $_: " . $ssh->error; } } waitpid ($_, 0) for (@pids); Under the hood, in order to create a tunnel, a new C process is spawned with the option C<-W${address}:${port}> (available from OpenSSH 5.4 and upwards) making it redirect its stdio streams to the remote given address. Unlike when C C<-L> options is used to create tunnels, no TCP port is opened on the local machine at any time so this is a perfectly secure operation. The PID of the new process is returned by the named methods. It must be reaped once the pipe or socket handlers for the local side of the tunnel have been closed. OpenSSH 5.4 or later is required for the tunnels functionality to work. Also, note that tunnel forwarding may be administratively forbidden at the server side (see L and L or the documentation provided by your SSH server vendor). =head2 Data encoding Net::OpenSSH has some support for transparently converting the data send or received from the remote server to Perl internal unicode representation. The methods supporting that feature are those that move data from/to Perl data structures (i.e. C, C, C and methods supporting the C option). Data accessed through pipes, sockets or redirections is not affected by the encoding options. It is also possible to set the encoding of the command and arguments passed to the remote server on the command line. By default, if no encoding option is given on the constructor or on the method calls, Net::OpenSSH will not perform any encoding transformation, effectively processing the data as latin1. When data can not be converted between the Perl internal representation and the selected encoding inside some Net::OpenSSH method, it will fail with an C error. The supported encoding options are as follows: =over 4 =item stream_encoding => $encoding sets the encoding of the data send and received on capture methods. =item argument_encoding => $encoding sets the encoding of the command line arguments =item encoding => $encoding sets both C and C. =back The constructor also accepts C, C and C that set the defaults. =head2 Diverting C When a code ref is installed at C<$Net::OpenSSH::FACTORY>, calls to new will be diverted through it. That feature can be used to transparently implement connection caching, for instance: my $old_factory = $Net::OpenSSH::FACTORY; my %cache; sub factory { my ($class, %opts) = @_; my $signature = join("\0", $class, map { $_ => $opts{$_} }, sort keys %opts); my $old = $cache{signature}; return $old if ($old and $old->error != OSSH_MASTER_FAILED); local $Net::OpenSSH::FACTORY = $old_factory; $cache{$signature} = $class->new(%opts); } $Net::OpenSSH::FACTORY = \&factory; ... and I am sure it can be abused in several other ways! =head1 3rd PARTY MODULE INTEGRATION =head2 Expect Sometimes you would like to use L to control some program running in the remote host. You can do it as follows: my ($pty, $pid) = $ssh->open2pty(@cmd) or die "unable to run remote command @cmd"; my $expect = Expect->init($pty); Then, you will be able to use the new Expect object in C<$expect> as usual. =head2 Net::Telnet This example is adapted from L documentation: my ($pty, $pid) = $ssh->open2pty({stderr_to_stdout => 1}) or die "unable to start remote shell: " . $ssh->error; my $telnet = Net::Telnet->new(-fhopen => $pty, -prompt => '/.*\$ $/', -telnetmode => 0, -cmd_remove_mode => 1, -output_record_separator => "\r"); $telnet->waitfor(-match => $telnet->prompt, -errmode => "return") or die "login failed: " . $telnet->lastline; my @lines = $telnet->cmd("who"); ... $telnet->close; waitpid($pid, 0); =head2 mod_perl and mod_perl2 L and L tie STDIN and STDOUT to objects that are not backed up by real file descriptors at the operative system level. Net::OpenSSH will fail if any of these handles is used explicitly or implicitly when calling some remote command. The workaround is to redirect them to C or to some file: open my $def_in, '<', '/dev/null' or die "unable to open /dev/null"; my $ssh = Net::OpenSSH->new($host, default_stdin_fh => $def_in); my $out = $ssh->capture($cmd1); $ssh->system({stdout_discard => 1}, $cmd2); $ssh->system({stdout_to_file => '/tmp/output'}, $cmd3); Also, note that from a security stand point, running ssh from inside the webserver process is not a great idea. An attacker exploiting some Apache bug would be able to access the ssh keys and passwords and gain unlimited access to the remote systems. If you can, use a queue (as L) or any other mechanism to execute the ssh commands from another process running under a different user account. At a minimum, ensure that C<~www-data/.ssh> (or similar) is not accessible through the web server! =head2 Other modules CPAN contains several modules that rely on SSH to perform their duties as for example L or L. Often, it is possible to instruct them to go through a Net::OpenSSH multiplexed connection employing some available constructor option. For instance: use Net::OpenSSH; use IPC::PerlIPC; my $ssh = Net::OpenSSH->new(...); $ssh->error and die "unable to connect to remote host: " . $ssh->error; my @cmd = $ssh->make_remote_command('/usr/bin/perl'); my $ipc = IPC::PerlSSH->new(Command => \@cmd); my @r = $ipc->eval('...'); or... use GRID::Machine; ... my @cmd = $ssh->make_remote_command('/usr/bin/perl'); my $grid = GRID::Machine->new(command => \@cmd); my $r = $grid->eval('print "hello world!\n"'); In other cases, some kind of plugin mechanism is provided by the 3rd party modules to allow for different transports. The method C may be used to create a pair of pipes for transport in these cases. =head1 TROUBLESHOOTING Usually, Net::OpenSSH works out of the box, but when it fails, some users have a hard time finding the cause of the problem. This mini troubleshooting guide should help you to find and solve it. =over 4 =item 1 - check the error message Add in your script, after the Net::OpenSSH constructor call, an error check: $ssh = Net::OpenSSH->new(...); $ssh->error and die "SSH connection failed: " . $ssh->error; The error message will tell what has gone wrong. =item 2 - OpenSSH version Ensure that you have a version of C recent enough: $ ssh -V OpenSSH_5.1p1 Debian-5, OpenSSL 0.9.8g 19 Oct 2007 OpenSSH version 4.1 was the first to support the multiplexing feature and is the minimal required by the module to work. I advise you to use the latest OpenSSH (currently 5.8) or at least a more recent version. The C constructor option lets you select the C binary to use. For instance: $ssh = Net::OpenSSH->new($host, ssh_cmd => "/opt/OpenSSH/5.8/bin/ssh") Some hardware vendors (i.e. Sun) include custom versions of OpenSSH bundled with the operative system. In priciple, Net::OpenSSH should work with these SSH clients as long as they are derived from some version of OpenSSH recent enough. Anyway, I advise you to use the real OpenSSH software if you can! =item 3 - run ssh from the command line Check you can connect to the remote host using the same parameters you are passing to Net::OpenSSH. In particular, ensure that you are running C as the same local user. If you are running your script from a webserver, the user would probably be C, C or something alike. Common problems are: =over 4 =item * Remote host public key not present in known_hosts file. The SSH protocol uses public keys to identify the remote hosts so that they can not be supplanted by some malicious third parties. For OpenSSH, usually the server public key is stored in C or in C and that key should be copied into the C<~/.ssh/known_hosts> file in the local machine (other SSH implementations may use other file locations). Maintaining the server keys when several hosts and clients are involved may be somewhat inconvenient, so most SSH clients, by default, when a new connection is stablished to a host whose key is not in the C file, show the key and ask the user if he wants the key copied there. =item * Wrong remote host public key in known_hosts file. This is another common problem that happens when some server is replaced or reinstalled from scratch and its public key changes becoming different to that installed on the C file. The easiest way to solve that problem is to remove the old key from the C file by hand using any editor and then to connect to the server replying C when asked to save the new key. =item * Wrong permissions for the C<~/.ssh> directory or its contents. OpenSSH client performs several checks on the access permissions of the C<~/.ssh> directory and its contents and refuses to use them when misconfigured. See the FILES section from the L man page. =item * Incorrect settings for password or public key authentication. Check that you are using the right password or that the user public key is correctly installed on the server. =back =item 4 - security checks on the multiplexing socket Net::OpenSSH performs some security checks on the directory where the multiplexing socket is going to be placed to ensure that it can not be accessed by other users. The default location for the multiplexing socket is under C<~/.libnet-openssh-perl>. It can be changed using the C and C constructor arguments. The requirements for that directory and all its parents are: =over 4 =item * They have to be owned by the user executing the script or by root =item * Their permission masks must be 0755 or more restrictive, so nobody else has permissions to perform write operations on them. =back The constructor option C disables these security checks, but you should not use it unless you understand its implications. =item 5 - file system must support sockets Some file systems (as for instance FAT or AFS) do not support placing sockets inside them. Ensure that the C path does not lay into one of those file systems. =back =head1 DEBUGGING Debugging of Net::OpenSSH internals is controlled through the variable C<$Net::OpenSSH::debug>. Every bit of this variable activates debugging of some subsystem as follows: =over 4 =item bit 1 - errors Dumps changes on the internal object attribute where errors are stored. =item bit 2 - ctl_path Dumps information about ctl_path calculation and the tests performed on that directory in order to decide if it is secure to place the multiplexing socket inside. =item bit 4 - connecting Dumps information about the establishment of new master connections. =item bit 8 - commands and arguments Dumps the command and arguments for every system/exec call. =item bit 16 - command execution Dumps information about the progress of command execution. =item bit 32 - destruction Dumps information about the destruction of Net::OpenSSH objects and the termination of the SSH master processes. =item bit 64 - IO loop Dumps information about the progress of the IO loop on capture operations. =item bit 128 - IO hexdumps Generates hexdumps of the information that travels through the SSH streams inside capture operations. =item bit 512 - OS tracing of the master process Use the module L to trace the SSH master process at the OS level. =back For instance, in order to activate all the debugging flags, you can use: $Net::OpenSSH::debug = ~0; Note that the meaning of the flags and the information generated is only intended for debugging of the module and may change without notice between releases. =head1 FAQ Frequent questions about the module: =over =item Connecting to switches, routers, etc. B: I can't get the method C, C, etc., to work when connecting to some router, switch, etc. What I am doing wrong? B: Roughly, the SSH protocol allows for two modes of operation: command mode and interactive mode. Command mode is designed to run single commands on the remote host. It opens an SSH channel between both hosts, ask the remote computer to run some given command and when it finnish the channel is closed. It is what you get, for instance, when you run something as... $ ssh my.unix.box cat foo.txt ... and it is also the way Net::OpenSSH runs commands on the remote host. Interactive mode launches a shell on the remote hosts with its stdio streams redirected to the local ones so that the user can transparently interact with it. Some devices (as probably the one you are using) do not run an standard, general purpose shell (i.e. C, C or C) but some custom program specially targeted and limited to the task of configuring the device. Usually, the SSH server running on these devices does not support command mode. It unconditionally attachs the restricted shell to any incoming SSH connection and waits for the user to enter commands through the redirected stdin stream. The only way to workaround this limitation is to make your script talk to the restricted shell (1-open a new SSH session, 2-wait for the shell prompt, 3-send a command, 4-read the output until you get to the shell prompt again, repeat from 3). The best tool for this task is probably L, used alone, as wrapped by L or combined with Net::OpenSSH (see L). There are some devices that support command mode but that only accept one command per connection. In that cases, using L is also probably the best option. =item Connection fails B: I am unable to make the module connect to the remote host... B: Have you read the trubleshooting section? (see L). =item Disable StrictHostKeyChecking B: Why don't you run C with C? B: Using C relaxes the default security level of SSH and it will be relatively easy to end with a misconfigured SSH (for instance, when C is unwriteable) that could be forged to connect to a bad host in order to perform man-in-the-middle attacks, etc. I advice you to do not use that option unless you fully understand its implications from a security point of view. If you want to use it anyway, past it to the constructor: $ssh = Net::OpenSSH->new($host, master_opts => [-o => "StrictHostKeyChecking=no"], ...); =item child process 14947 does not exist: No child processes B: Calls to C, C or C fail with the previous error, what I am doing wrong? B: That usually happens when C<$SIG{CHLD}> is set to C or to some custom handler reaping child processes by itself. In order to solve the problem just disable the handler during the method call: local $SIG{CHLD}; $ssh->system($cmd); =item child process STDIN/STDOUT/STDERR is not a real system file handle B: Calls to C, C, etc. fail with the previous error, what's happening? B: The reported stdio stream is closed or is not attached to a real file handle (i.e. it is a tied handle). Redirect it to C or to a real file: my $out = $ssh->capture({stdin_discard => 1, stderr_to_stdout => 1}, $cmd); See also the L entry above. =item Solaris (and AIX and probably others) B: I was trying Net::OpenSSH on Solaris and seem to be running into an issue... B: The SSH client bundled with Solaris is an early fork of OpenSSH that does not provide the multiplexing functionality required by Net::OpenSSH. You will have to install the OpenSSH client. Precompiled packages are available from Sun Freeware (L). There, select your OS version an CPU architecture, download the OpenSSH package and its dependencies and install them. Note that you do B need to configure Solaris to use the OpenSSH server C. Ensure that OpenSSH client is in your path before the system C or alternatively, you can hardcode the full path into your scripts as follows: $ssh = Net::OpenSSH->new($host, ssh_cmd => '/usr/local/bin/ssh'); AIX and probably some other unixen, also bundle SSH clients lacking the multiplexing functionality and require installation of the real OpenSSH. =item Can't change working directory B: I want to run some command inside a given remote directory but I am unable to change the working directory. For instance: $ssh->system('cd /home/foo/bin'); $ssh->systen('ls'); does not list the contents of C. What am I doing wrong? B: Net::OpenSSH (and, for that matter, all the SSH modules available from CPAN but L) runs every command in a new session so most shell builtins that are run for its side effects become useless (i.e. C, C, C, C, etc., usually, you can list them running help from the shell). A work around is to combine several commands in one, for instance: $ssh->system('cd /home/foo/bin && ls'); Note the use of the shell C<&&> operator instead of C<;> in order to abort the command as soon as any of the subcommands fail. Also, several commands can be combined into one while still using the multi-argument quoting feature as follows: $ssh->system(@cmd1, \\'&&', @cmd2, \\'&&', @cmd3, ...); =item Running detached remote processes B: I need to be able to ssh into several machines from my script, launch a process to run in the background there, and then return immediately while the remote programs keep running... B: If the remote systems run some Unix/Linux variant, the right approach is to use L that will disconnect the remote process from the stdio streams and to ask the shell to run the command on the background. For instance: $ssh->system("nohup $long_running_command &"); Also, it may be possible to demonize the remote program. If it is written in Perl you can use L for that (actually, there are several CPAN modules that provided that kind of functionality). In any case, note that you shouldn't use L for that. =item MaxSessions server limit reached B: I created an C<$ssh> object and then fork a lot children processes which use this object. When the children number is bigger than C as defined in sshd configuration (defaults to 10), trying to fork new remote commands will prompt the user for the password. B: When the slave SSH client gets a response from the remote servers saying that the maximum number of sessions for the current connection has been reached, it fallbacks to open a new direct connection without going through the multiplexing socket. To stop that for happening, the following hack can be used: $ssh = Net::OpenSSH->new(host, default_ssh_opts => ['-oConnectionAttempts=0'], ...); =item Running remote commands with sudo B: How can I run remote commands using C to become root first? B: The simplest way is to tell C to read the password from stdin with the C<-S> flag and to do not use cached credentials with the C<-k> flag. You may also like to use the C<-p> flag to tell C to print an empty prompt. For instance: my @out = $ssh->capture({stdin_data => "$sudo_passwd\n"}, 'sudo', '-Sk', '-p', '', '--', @cmd); If the version of sudo installed on the remote host does not support the C<-S> flag (it tells sudo to read the password from its STDIN stream), you can do it as follows: my @out = $ssh->capture({tty => 1, stdin_data => "$sudo_passwd\n"}, 'sudo', '-k', '-p', '', '--', @cmd); This may generate an spurious and harmless warning from the SSH master connection (because we are requesting allocation of a tty on the remote side and locally we are attaching it to a regular pair of pipes). If for whatever reason the methods described above fail, you can always revert to using Expect to talk to the remote C. See the C script from this module distribution. =back =head1 SEE ALSO OpenSSH client documentation L, L, the project web L and its FAQ L. L and L. The OpenSSH Wikibook L. L for detailed instruction about how to get this module to connect to hosts through proxies and other SSH gateway servers. Core perl documentation L, L, L. L to known how to use the pseudo tty objects returned by several methods on this package. L provides a compatible SFTP implementation. L can be used to interact with commands run through this module on the remote machine (see also the C and scripts in the sample directory). L is an advanced scheduler that allows one to run commands in remote hosts in parallel. It is obviously based on Net::OpenSSH. L allows one to run remote commands in parallel in a cluster. It is build on top on C also. Other Perl SSH clients: L, L, L, L, L, L. L is a package offering a set of compatibility layers for other SSH modules on top of Net::OpenSSH. L, L allow execution of Perl code in remote machines through SSH. L implements an RPC mechanism on top of SSH using Net::OpenSSH to handle the connections. =head1 BUGS AND SUPPORT Support for the gateway feature is highly experimental. Support for data encoding is experimental. Support for taint mode is experimental. Tested on Linux, OpenBSD, NetBSD and Solaris with OpenSSH 5.1 to 5.9. Net::OpenSSH does not work on Windows. OpenSSH multiplexing feature requires passing file handles through sockets, something that is not supported by any version of Windows. It doesn't work on VMS either... well, probably, it doesn't work on anything not resembling a modern Linux/Unix OS. To report bugs send an email to the address that appear below or use the CPAN bug tracking system at L. B L, you will probably get faster responses than if you address me directly and I visit Perlmonks quite often, so I will see your question anyway. The source code of this module is hosted at GitHub: L. =head2 Commercial support Commercial support, professional services and custom software development around this module are available through my current company. Drop me an email with a rough description of your requirements and we will get back to you ASAP. =head2 My wishlist If you like this module and you're feeling generous, take a look at my Amazon Wish List: L. Also consider contributing to the OpenSSH project this module builds upon: L. =head1 TODO - *** add tests for scp, rsync and sftp methods - *** add support for more target OSs (quoting, OpenVMS, Windows & others) - better timeout handling in system and capture methods - make L and L methods L based - add C and similar methods - async disconnect - currently wait_for_master does not honor timeout - auto_discard_streams feature for mod_perl2 and similar environments - add proper shell quoting for Windows (see L). Send your feature requests, ideas or any feedback, please! =head1 COPYRIGHT AND LICENSE Copyright (C) 2008-2013 by Salvador FandiEo (sfandino@yahoo.com) This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.10.0 or, at your option, any later version of Perl 5 you may have available. =cut Net-OpenSSH-0.60/lib/Net/OpenSSH/0000755000175000017500000000000012107432777015225 5ustar salvasalvaNet-OpenSSH-0.60/lib/Net/OpenSSH/OSTracer.pm0000644000175000017500000001227411721153767017253 0ustar salvasalvapackage Net::OpenSSH::OSTracer; our $VERSION = '0.58_01'; use strict; use warnings; use POSIX; our $cmd; our $type; our $output; our $sudo; our $delay; our @EXTRA_ARGS; my %type_by_os = (linux => 'strace', openbsd => 'ktrace', freebsd => 'ktrace', netbsd => 'ktrace', bsd => 'ktrace', 'hp-ux' => 'tusc', aix => 'truss', solaris => 'truss'); sub trace { my $class = shift; my ($cmd, $type) = ($cmd, $type); # copy globals if (not defined $type) { my $os = lc $^O; if ( defined $cmd and $cmd =~ /([sk]trace|k?truss|tusc)$/) { $type = $1; } elsif ($os =~ /(linux|openbsd|freebsd|netbsd|bsd|hp-ux|aix|solaris)/) { $type = $type_by_os{$1}; } else { Net::OpenSSH::_debug("unable to determine tracer type for OS $os"); return; } } my $output1 = (defined $output ? $output : "/tmp/net_openssh_master") . ".$$"; my $file = "$output1.$type"; my $err = "$output1.txt"; $cmd = $type unless defined $cmd; my @args; if ($type eq 'strace') { @args = (-o => $file, -p => $$, -s => 1024, '-fx'); } elsif ($type eq 'ktruss') { @args = (-o => $file, -p => $$, -m => 1024, '-d'); } elsif ($type eq 'ktrace') { @args = (-f => $file, -p => $$, '-id'); } elsif ($type eq 'tusc') { @args = (-o => $file, -b => 1024, '-fa', $$) } elsif ($type eq 'truss') { @args = (-o => $file, -faep => $$); } else { Net::OpenSSH::_debug("tracer type $type not supported"); return } my @cmd = (defined $sudo ? ($sudo, '-A', $cmd) : $cmd); my $pid = fork; unless ($pid) { unless (defined $pid) { Net::OpenSSH::_debug("unable to launch tracer, fork failed: $!"); return; } my ($in, $out); if (open $in, '', $err and POSIX::dup2(fileno $in, 0) and POSIX::dup2(fileno $out, 1) and POSIX::dup2(fileno $out, 2)) { exec (@cmd, @EXTRA_ARGS, @args); } else { eval { Net::OpenSSH::_debug("Unable to redirect tracer IO: $!") }; } POSIX::_exit(1); } sleep (defined $delay ? $delay : 1); # wait for the tracer to come up Net::OpenSSH::_debug("tracer attached, ssh pid: $$, tracer pid: $pid"); 1; } 1; __END__ =head1 NAME Net::OpenSSH::OSTracer - trace ssh master process at the OS level =head1 SYNOPSIS use Net::OpenSSH; $Net::OpenSSH::debug |= 512; Net::OpenSSH->new($host)->system("echo hello world"); system "less /tmp/net_openssh_master.*.strace"; =head1 DESCRIPTION This is a Net::OpenSSH helper module that allows you to trace the master ssh process at the operating system level using the proper utility available in your system (i.e, strace, truss, ktruss, tusc, etc.). This feature can be used when debugging your programs or to report bugs on the module. It is enabled setting the flag 512 on the C<$Net::OpenSSH::debug> variable: $Net::OpenSSH::debug |= 512; By default the ouput files of the tracer are saved as C. Also, the output send by the tracer to stdout/stderr is saved as C. The module can be configured through the following global variables: =over 4 =item $Net::OpenSSH::OSTracer::type By default, the module decides which tracer to use in base to the operative system name. This variable allows to select a different tracer. Currently accepted types are: strace (linux), ktrace (*bsd), tusc (hp-ux) and truss (solaris and aix). =item $Net::OpenSSH::OSTracer::cmd Command to execute for tracing the ssh process. By default, it inferres it from the tracer type selected. =item $Net::OpenSSH::OSTracer::output Basename for the destination file. The PID of the ssh process and the tracer type will be appended. =item $Net::OpenSSH::OSTracer::sudo This variable can be used to request the tracer to be run with C (some operating systems as for example Ubuntu, do not allow to attach tracers, even to your own processes, unless you do it as root). The variable has to be set with the path of the C binary. For instance: $Net::OpenSSH::OSTracer::sudo = '/usr/bin/sudo'; If you need to pass a password to C, set the environment variable C. For instance: SUDO_ASKPASS=/usr/bin/ssh-askpass =item $Net::OpenSSH::OSTracer::delay This variable can be used to delay the ssh execution so that the tracer can attach the process first. This is specially handy when using C with a password. =back =head1 BUGS This module has not been tested under all the operating systems is says to support. If you find any problem, just report it, please! =head1 COPYRIGHT AND LICENSE Copyright (C) 2012 by Salvador FandiEo (sfandino@yahoo.com) This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.10.0 or, at your option, any later version of Perl 5 you may have available. =cut Net-OpenSSH-0.60/lib/Net/OpenSSH/Constants.pm0000644000175000017500000000335511721153767017545 0ustar salvasalvapackage Net::OpenSSH::Constants; our $VERSION = '0.51_07'; use strict; use warnings; use Carp; require Exporter; our @ISA = qw(Exporter); our %EXPORT_TAGS = (error => []); my %error = ( OSSH_MASTER_FAILED => 1, OSSH_SLAVE_FAILED => 2, OSSH_SLAVE_PIPE_FAILED => 3, OSSH_SLAVE_TIMEOUT => 4, OSSH_SLAVE_CMD_FAILED => 5, OSSH_SLAVE_SFTP_FAILED => 6, OSSH_ENCODING_ERROR => 7 ); for my $key (keys %error) { no strict 'refs'; my $value = $error{$key}; *{$key} = sub () { $value }; push @{$EXPORT_TAGS{error}}, $key } our @EXPORT_OK = map { @{$EXPORT_TAGS{$_}} } keys %EXPORT_TAGS; $EXPORT_TAGS{all} = [@EXPORT_OK]; 1; __END__ =head1 NAME Net::OpenSSH::Constants - Constant definitions for Net::OpenSSH =head1 SYNOPSIS use Net::OpenSSH::Constants qw(:error); =head1 DESCRIPTION This module exports the following constants: =over 4 =item :error OSSH_MASTER_FAILED - some error related to the master SSH connection happened OSSH_SLAVE_FAILED - some error related to a slave SSH connection happened OSSH_SLAVE_PIPE_FAILED - unable to create pipe to communicate with slave process OSSH_SLAVE_TIMEOUT - slave process timeout OSSH_SLAVE_CMD_FAILED - child process exited with a non zero status OSSH_SLAVE_SFTP_FAILED - creation of SFTP client failed OSS_ENCODING_ERROR - some error related to the encoding/decoding of strings happened =back =head1 COPYRIGHT AND LICENSE Copyright (C) 2008, 2009 by Salvador FandiEo (sfandino@yahoo.com) This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.10.0 or, at your option, any later version of Perl 5 you may have available. =cut Net-OpenSSH-0.60/lib/Net/OpenSSH/ConnectionCache.pm0000644000175000017500000000405111721153767020606 0ustar salvasalvapackage Net::OpenSSH::ConnectionCache; use Net::OpenSSH; use Net::OpenSSH::Constants qw(:error); use Data::Dumper; use Scalar::Util qw(weaken); our $MAX_SIZE = 20; my %cache; sub _factory { my $class = shift; my %opts = @_; my $dump = Data::Dumper->new([\%opts], ['s']); $dump->Indent(0); $dump->Sortkeys(1); $dump->Deepcopy(1); my $signature = $dump->Dump; my $ssh = $cache{$signature}; if ($ssh and $ssh->error != OSSH_MASTER_FAILED) { if ($opts{async} or $ssh->wait_for_master) { return $cache{$signature} = $ssh; } } if ($MAX_SIZE <= keys %cache) { for (keys %cache) { $ssh = $cache{$_}; $ssh or $ssh->error != OSSH_MASTER_FAILED or delete $cache{$_} } for (keys %cache) { last if ($MAX_SIZE <= keys %cache); weaken $cache{$_}; if (defined $cache{$_}) { $cache{$_} = $cache{$_}; # unweaken } else { delete $cache{$_}; } } } local $Net::OpenSSH::FACTORY; $cache{$signature} = $class->new(@_); } $Net::OpenSSH::FACTORY = \&_factory; END { %cache = () } 1; __END__ =head1 NAME Net::OpenSSH::ConnectionCache - cache and reuse SSH connections transparently =head1 SYNOPSIS use Net::OpenSSH; use Net::OpenSSH::ConnectionCache; for (1..10) { my $ssh = Net::OpenSSH->new($host); $ssh->system("$cmd $_"); } =head1 DESCRIPTION This module installs a C<$Net::OpenSSH::FACTORY> hook implementing a SSH connection caching scheme. C<$Net::OpenSSH::ConnectionCache::MAX_SIZE> controls the cache size. Once as many connections are allocated, the module will try to free any of them before allocating a new one. =head1 COPYRIGHT AND LICENSE Copyright (C) 2011 by Salvador FandiEo (sfandino@yahoo.com) This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.10.0 or, at your option, any later version of Perl 5 you may have available. =cut