diff options
| -rw-r--r-- | .gitignore | 2 | ||||
| -rw-r--r-- | HACKING | 8 | ||||
| -rw-r--r-- | Makefile.am | 3 | ||||
| -rw-r--r-- | cat/Makefile.am | 78 | ||||
| -rwxr-xr-x | cat/run-cat-locally | 53 | ||||
| -rwxr-xr-x | cat/test-virt-cat.sh (renamed from tools/test-virt-cat.sh) | 0 | ||||
| -rw-r--r-- | cat/virt-cat.c | 245 | ||||
| -rwxr-xr-x | cat/virt-cat.pod | 200 | ||||
| -rw-r--r-- | configure.ac | 1 | ||||
| -rw-r--r-- | po/POTFILES.in | 2 | ||||
| -rw-r--r-- | tools/Makefile.am | 8 | ||||
| -rwxr-xr-x | tools/virt-cat | 215 |
12 files changed, 590 insertions, 225 deletions
@@ -30,6 +30,8 @@ capitests/test*.img capitests/tests capitests/tests.c capitests/test*.tmp +cat/virt-cat +cat/virt-cat.1 ChangeLog *.class *.cma @@ -71,6 +71,9 @@ appliance/ capitests/ Automated tests of the C API. +cat/ + The 'virt-cat' command and documentation. + contrib/ Outside contributions, experimental parts. @@ -145,10 +148,7 @@ ruby/ Ruby bindings. tools/ - Command line tools like virt-cat, virt-df, virt-edit and more. - In versions <= 1.0.73 these were all in separate directories - like cat/, df/, edit/, but since then we moved them all into - one directory to simplify builds. + Command line tools like virt-df, virt-edit and more. src/ Source code to the C library. diff --git a/Makefile.am b/Makefile.am index a5347506..5aa1a54a 100644 --- a/Makefile.am +++ b/Makefile.am @@ -35,6 +35,9 @@ SUBDIRS += gnulib/tests capitests regressions test-tool # Guestfish. SUBDIRS += fish +# virt-cat (in C). +SUBDIRS += cat + # Language bindings. if HAVE_PERL SUBDIRS += perl diff --git a/cat/Makefile.am b/cat/Makefile.am new file mode 100644 index 00000000..a8e9b318 --- /dev/null +++ b/cat/Makefile.am @@ -0,0 +1,78 @@ +# libguestfs virt-cat. +# Copyright (C) 2010 Red Hat Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +include $(top_srcdir)/subdir-rules.mk + +EXTRA_DIST = \ + run-cat-locally \ + test-virt-cat.sh \ + virt-cat.pod + +bin_PROGRAMS = virt-cat + +SHARED_SOURCE_FILES = \ + ../fish/inspect.c \ + ../fish/keys.c \ + ../fish/options.h \ + ../fish/options.c \ + ../fish/virt.c + +virt_cat_SOURCES = \ + $(SHARED_SOURCE_FILES) \ + virt-cat.c + +virt_cat_CFLAGS = \ + -I$(top_srcdir)/src -I$(top_builddir)/src \ + -I$(top_srcdir)/fish \ + -I$(srcdir)/../gnulib/lib -I../gnulib/lib \ + -DLOCALEBASEDIR=\""$(datadir)/locale"\" \ + $(WARN_CFLAGS) $(WERROR_CFLAGS) + +virt_cat_LDADD = \ + $(top_builddir)/src/libguestfs.la \ + ../gnulib/lib/libgnu.la + +# Manual pages and HTML files for the website. +man_MANS = virt-cat.1 + +noinst_DATA = $(top_builddir)/html/virt-cat.1.html + +virt-cat.1: virt-cat.pod + $(POD2MAN) \ + --section 1 \ + -c "Virtualization Support" \ + --release "$(PACKAGE_NAME)-$(PACKAGE_VERSION)" \ + $< > $@-t && mv $@-t $@ + +$(top_builddir)/html/virt-cat.1.html: virt-cat.pod + mkdir -p $(top_builddir)/html + cd $(top_builddir) && pod2html \ + --css 'pod.css' \ + --htmldir html \ + --outfile html/$@ \ + $(abs_srcdir)/$< + +# Tests. + +random_val := $(shell awk 'BEGIN{srand(); print 1+int(255*rand())}' < /dev/null) + +TESTS_ENVIRONMENT = \ + MALLOC_PERTURB_=$(random_val) \ + LD_LIBRARY_PATH=$(top_builddir)/src/.libs \ + LIBGUESTFS_PATH=$(top_builddir)/appliance + +TESTS = test-virt-cat.sh diff --git a/cat/run-cat-locally b/cat/run-cat-locally new file mode 100755 index 00000000..7945463c --- /dev/null +++ b/cat/run-cat-locally @@ -0,0 +1,53 @@ +#!/usr/bin/perl +# Copyright (C) 2009 Red Hat Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +# This script sets up the environment so you can run virt-* tools in +# place without needing to do 'make install' first. You can also run +# the tools by creating a symlink to this script and putting it in +# your path. +# +# Use it like this: +# ./run-cat-locally [usual virt-cat args ...] + +use strict; +use warnings; + +use File::Basename qw(dirname); +use File::Spec; +use Cwd qw(abs_path); + +my $path = $0; +my $tool = "cat"; + +# Follow symlinks until we get to the real file +while(-l $path) { + my $link = readlink($path) or die "readlink: $path: $!"; + if(File::Spec->file_name_is_absolute($link)) { + $path = $link; + } else { + $path = File::Spec->catfile(dirname($path), $link); + } +} + +# Get the absolute path of the parent directory +$path = abs_path(dirname($path).'/..'); + +$ENV{LD_LIBRARY_PATH} = $path.'/src/.libs'; +$ENV{LIBGUESTFS_PATH} = $path.'/appliance'; + +#print (join " ", ("$path/$tool/virt-$tool", @ARGV), "\n"); +exec('perl', "$path/$tool/virt-$tool", @ARGV); diff --git a/tools/test-virt-cat.sh b/cat/test-virt-cat.sh index 19b8d875..19b8d875 100755 --- a/tools/test-virt-cat.sh +++ b/cat/test-virt-cat.sh diff --git a/cat/virt-cat.c b/cat/virt-cat.c new file mode 100644 index 00000000..58ebd8ec --- /dev/null +++ b/cat/virt-cat.c @@ -0,0 +1,245 @@ +/* virt-cat + * Copyright (C) 2010 Red Hat Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <config.h> + +#include <stdio.h> +#include <stdlib.h> +#include <inttypes.h> +#include <unistd.h> +#include <getopt.h> +#include <assert.h> + +#include "progname.h" + +#include "guestfs.h" +#include "options.h" + +/* Currently open libguestfs handle. */ +guestfs_h *g; + +int read_only = 1; +int verbose = 0; +int keys_from_stdin = 0; +int echo_keys = 0; +const char *libvirt_uri = NULL; +int inspector = 1; + +static inline char * +bad_cast (char const *s) +{ + return (char *) s; +} + +static void __attribute__((noreturn)) +usage (int status) +{ + if (status != EXIT_SUCCESS) + fprintf (stderr, _("Try `%s --help' for more information.\n"), + program_name); + else { + fprintf (stdout, + _("%s: display files in a virtual machine\n" + "Copyright (C) 2010 Red Hat Inc.\n" + "Usage:\n" + " %s [--options] -d domname file [file ...]\n" + " %s [--options] -a disk.img [-a disk.img ...] file [file ...]\n" + "Options:\n" + " -a|--add image Add image\n" + " -c|--connect uri Specify libvirt URI for -d option\n" + " -d|--domain guest Add disks from libvirt guest\n" + " --echo-keys Don't turn off echo for passphrases\n" + " --format[=raw|..] Force disk format for -a option\n" + " --help Display brief help\n" + " --keys-from-stdin Read passphrases from stdin\n" + " -v|--verbose Verbose messages\n" + " -V|--version Display version and exit\n" + " -x Echo each command before executing it\n" + "For more information, see the manpage %s(1).\n"), + program_name, program_name, program_name, + program_name); + } + exit (status); +} + +int +main (int argc, char *argv[]) +{ + /* Set global program name that is not polluted with libtool artifacts. */ + set_program_name (argv[0]); + + setlocale (LC_ALL, ""); + bindtextdomain (PACKAGE, LOCALEBASEDIR); + textdomain (PACKAGE); + + enum { HELP_OPTION = CHAR_MAX + 1 }; + + static const char *options = "a:c:d:vVx"; + static const struct option long_options[] = { + { "add", 1, 0, 'a' }, + { "connect", 1, 0, 'c' }, + { "domain", 1, 0, 'd' }, + { "echo-keys", 0, 0, 0 }, + { "format", 2, 0, 0 }, + { "help", 0, 0, HELP_OPTION }, + { "keys-from-stdin", 0, 0, 0 }, + { "verbose", 0, 0, 'v' }, + { "version", 0, 0, 'V' }, + { 0, 0, 0, 0 } + }; + struct drv *drvs = NULL; + struct drv *drv; + char *p, *file = NULL; + const char *format = NULL; + int c; + int option_index; + int next_prepared_drive = 1; + + g = guestfs_create (); + if (g == NULL) { + fprintf (stderr, _("guestfs_create: failed to create handle\n")); + exit (EXIT_FAILURE); + } + + argv[0] = bad_cast (program_name); + + for (;;) { + c = getopt_long (argc, argv, options, long_options, &option_index); + if (c == -1) break; + + switch (c) { + case 0: /* options which are long only */ + if (STREQ (long_options[option_index].name, "keys-from-stdin")) { + keys_from_stdin = 1; + } else if (STREQ (long_options[option_index].name, "echo-keys")) { + echo_keys = 1; + } else if (STREQ (long_options[option_index].name, "format")) { + if (!optarg || STREQ (optarg, "")) + format = NULL; + else + format = optarg; + } else { + fprintf (stderr, _("%s: unknown long option: %s (%d)\n"), + program_name, long_options[option_index].name, option_index); + exit (EXIT_FAILURE); + } + break; + + case 'a': + OPTION_a; + break; + + case 'c': + OPTION_c; + break; + + case 'd': + OPTION_d; + break; + + case 'h': + usage (EXIT_SUCCESS); + + case 'v': + OPTION_v; + break; + + case 'V': + OPTION_V; + break; + + case 'x': + OPTION_x; + break; + + case HELP_OPTION: + usage (EXIT_SUCCESS); + + default: + usage (EXIT_FAILURE); + } + } + + /* Old-style syntax? There were no -a or -d options in the old + * virt-cat which is how we detect this. + */ + if (drvs == NULL) { + /* argc - 1 because last parameter is the single filename. */ + while (optind < argc - 1) { + if (strchr (argv[optind], '/') || + access (argv[optind], F_OK) == 0) { /* simulate -a option */ + drv = malloc (sizeof (struct drv)); + if (!drv) { + perror ("malloc"); + exit (EXIT_FAILURE); + } + drv->type = drv_a; + drv->a.filename = argv[optind]; + drv->a.format = NULL; + drv->next = drvs; + drvs = drv; + } else { /* simulate -d option */ + drv = malloc (sizeof (struct drv)); + if (!drv) { + perror ("malloc"); + exit (EXIT_FAILURE); + } + drv->type = drv_d; + drv->d.guest = argv[optind]; + drv->next = drvs; + drvs = drv; + } + + optind++; + } + } + + /* These are really constants, but they have to be variables for the + * options parsing code. Assert here that they have known-good + * values. + */ + assert (read_only == 1); + assert (inspector == 1); + + /* User must specify at least one filename on the command line. */ + if (optind >= argc || argc - optind < 1) + usage (EXIT_FAILURE); + + /* Add drives, inspect and mount. Note that inspector is always true, + * and there is no -m option. + */ + add_drives (drvs, 'a'); + + if (guestfs_launch (g) == -1) + exit (EXIT_FAILURE); + + inspect_mount (); + + /* Free up data structures, no longer needed after this point. */ + free_drives (drvs); + + while (optind < argc) { + if (guestfs_download (g, argv[optind], "/dev/stdout") == -1) + exit (EXIT_FAILURE); + optind++; + } + + guestfs_close (g); + + exit (EXIT_SUCCESS); +} diff --git a/cat/virt-cat.pod b/cat/virt-cat.pod new file mode 100755 index 00000000..b203bbfe --- /dev/null +++ b/cat/virt-cat.pod @@ -0,0 +1,200 @@ +=encoding utf8 + +=head1 NAME + +virt-cat - Display files in a virtual machine + +=head1 SYNOPSIS + + virt-cat [--options] -d domname file [file ...] + + virt-cat [--options] -a disk.img [-a disk.img ...] file [file ...] + +Old-style: + + virt-cat domname file + + virt-cat disk.img file + +=head1 DESCRIPTION + +C<virt-cat> is a command line tool to display the contents of C<file> +where C<file> exists in the named virtual machine (or disk image). + +Multiple filenames can be given, in which case they are concatenated +together. Each filename must be a full path, starting at the root +directory (starting with '/'). + +C<virt-cat> can be used to quickly view a file. To edit a file, use +C<virt-edit>. For more complex cases you should look at the +L<guestfish(1)> tool. + +=head1 EXAMPLES + +Display C</etc/fstab> file from inside the libvirt VM called +C<mydomain>: + + virt-cat -d mydomain /etc/fstab + +List syslog messages from a VM disk image file: + + virt-cat -a disk.img /var/log/messages | tail + +Find out what DHCP IP address a VM acquired: + + virt-cat -d mydomain /var/log/messages | \ + grep 'dhclient: bound to' | tail + +Find out what packages were recently installed: + + virt-cat -d mydomain /var/log/yum.log | tail + +Find out who is logged on inside a virtual machine: + + virt-cat -d mydomain /var/run/utmp > /tmp/utmp + who /tmp/utmp + +or who was logged on: + + virt-cat -d mydomain /var/log/wtmp > /tmp/wtmp + last -f /tmp/wtmp + +=head1 OPTIONS + +=over 4 + +=item B<--help> + +Display brief help. + +=item B<-a> file + +=item B<--add> file + +Add I<file> which should be a disk image from a virtual machine. If +the virtual machine has multiple block devices, you must supply all of +them with separate I<-a> options. + +The format of the disk image is auto-detected. To override this and +force a particular format use the I<--format=..> option. + +=item B<-c> URI + +=item B<--connect> URI + +If using libvirt, connect to the given I<URI>. If omitted, then we +connect to the default libvirt hypervisor. + +If you specify guest block devices directly (I<-a>), then libvirt is +not used at all. + +=item B<-d> guest + +=item B<--domain> guest + +Add all the disks from the named libvirt guest. + +=item B<--echo-keys> + +When prompting for keys and passphrases, virt-cat normally turns +echoing off so you cannot see what you are typing. If you are not +worried about Tempest attacks and there is no one else in the room you +can specify this flag to see what you are typing. + +=item B<--format=raw|qcow2|..> | B<--format> + +The default for the I<-a> option is to auto-detect the format of the +disk image. Using this forces the disk format for I<-a> options which +follow on the command line. Using I<--format> with no argument +switches back to auto-detection for subsequent I<-a> options. + +For example: + + virt-cat --format=raw -a disk.img + +forces raw format (no auto-detection) for C<disk.img>. + + virt-cat --format=raw -a disk.img --format -a another.img + +forces raw format (no auto-detection) for C<disk.img> and reverts to +auto-detection for C<another.img>. + +If you have untrusted raw-format guest disk images, you should use +this option to specify the disk format. This avoids a possible +security problem with malicious guests (CVE-2010-3851). See also +L</add-drive-opts>. + +=item B<--keys-from-stdin> + +Read key or passphrase parameters from stdin. The default is +to try to read passphrases from the user by opening C</dev/tty>. + +=item B<-v> + +=item B<--verbose> + +Enable verbose messages for debugging. + +=item B<-V> + +=item B<--version> + +Display version number and exit. + +=item B<-x> + +Enable tracing of libguestfs API calls. + +=back + +=head1 OLD-STYLE COMMAND LINE ARGUMENTS + +Previous versions of virt-cat allowed you to write either: + + virt-cat disk.img [disk.img ...] file + +or + + virt-cat guestname file + +whereas in this version you should use I<-a> or I<-d> respectively +to avoid the confusing case where a disk image might have the same +name as a guest. + +For compatibility the old style is still supported. + +=head1 SHELL QUOTING + +Libvirt guest names can contain arbitrary characters, some of which +have meaning to the shell such as C<#> and space. You may need to +quote or escape these characters on the command line. See the shell +manual page L<sh(1)> for details. + +=head1 SEE ALSO + +L<guestfs(3)>, +L<guestfish(1)>, +L<virt-edit(1)>, +L<http://libguestfs.org/>. + +=head1 AUTHOR + +Richard W.M. Jones L<http://people.redhat.com/~rjones/> + +=head1 COPYRIGHT + +Copyright (C) 2010 Red Hat Inc. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. diff --git a/configure.ac b/configure.ac index 25943690..83da1f20 100644 --- a/configure.ac +++ b/configure.ac @@ -859,6 +859,7 @@ AC_CONFIG_FILES([Makefile po-docs/ja/Makefile php/Makefile csharp/Makefile + cat/Makefile ocaml/META perl/Makefile.PL]) AC_OUTPUT diff --git a/po/POTFILES.in b/po/POTFILES.in index d76904dc..3ddb0c22 100644 --- a/po/POTFILES.in +++ b/po/POTFILES.in @@ -1,3 +1,4 @@ +cat/virt-cat.c daemon/augeas.c daemon/available.c daemon/base64.c @@ -134,7 +135,6 @@ src/proto.c src/virt.c test-tool/helper.c test-tool/test-tool.c -tools/virt-cat.pl tools/virt-df.pl tools/virt-edit.pl tools/virt-list-filesystems.pl diff --git a/tools/Makefile.am b/tools/Makefile.am index 5b415c0e..651daf9b 100644 --- a/tools/Makefile.am +++ b/tools/Makefile.am @@ -18,7 +18,6 @@ include $(top_srcdir)/subdir-rules.mk tools = \ - cat \ df \ edit \ list-filesystems \ @@ -43,10 +42,10 @@ bin_SCRIPTS = $(tools:%=virt-%) # Manual pages and HTML files for the website. -# XXX Bug in automake? If you list virt-cat.1 explicitly, then it +# XXX Bug in automake? If you list virt-df.1 explicitly, then it # builds and installs the man pages. However if this is removed, # then the man pages are neither built nor installed. -man_MANS = virt-cat.1 $(patsubst %,virt-%.1,$(filter-out cat,$(tools))) +man_MANS = virt-df.1 $(patsubst %,virt-%.1,$(filter-out df,$(tools))) noinst_DATA = $(tools:%=$(top_builddir)/html/virt-%.1.html) @@ -75,8 +74,7 @@ TESTS_ENVIRONMENT = \ LIBGUESTFS_PATH=$(top_builddir)/appliance \ PERL5LIB=$(top_builddir)/perl/blib/lib:$(top_builddir)/perl/blib/arch -TESTS = test-virt-cat.sh \ - test-virt-df.sh \ +TESTS = test-virt-df.sh \ test-virt-list-filesystems.sh \ test-virt-ls.sh \ test-virt-make-fs.sh \ diff --git a/tools/virt-cat b/tools/virt-cat deleted file mode 100755 index 546e85cf..00000000 --- a/tools/virt-cat +++ /dev/null @@ -1,215 +0,0 @@ -#!/usr/bin/perl -w -# virt-cat -# Copyright (C) 2009-2010 Red Hat Inc. -# -# This program is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2 of the License, or -# (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - -use warnings; -use strict; - -use Sys::Guestfs; -use Sys::Guestfs::Lib qw(open_guest); -use Pod::Usage; -use Getopt::Long; -use File::Basename; -use Locale::TextDomain 'libguestfs'; - -=encoding utf8 - -=head1 NAME - -virt-cat - Display a file in a virtual machine - -=head1 SYNOPSIS - - virt-cat [--options] domname file - - virt-cat [--options] disk.img [disk.img ...] file - -=head1 DESCRIPTION - -C<virt-cat> is a command line tool to display the contents of C<file> -where C<file> exists in the named virtual machine (or disk image). - -C<virt-cat> can be used to quickly view a single file. To edit a -file, use C<virt-edit>. For more complex cases you should look at the -L<guestfish(1)> tool. - -=head1 EXAMPLES - -Display C</etc/fstab> file from inside the libvirt VM called -C<mydomain>: - - virt-cat mydomain /etc/fstab - -List syslog messages from a VM: - - virt-cat mydomain /var/log/messages | tail - -Find out what DHCP IP address a VM acquired: - - virt-cat mydomain /var/log/messages | grep 'dhclient: bound to' | tail - -Find out what packages were recently installed: - - virt-cat mydomain /var/log/yum.log | tail - -Find out who is logged on inside a virtual machine: - - virt-cat mydomain /var/run/utmp > /tmp/utmp - who /tmp/utmp - -or who was logged on: - - virt-cat mydomain /var/log/wtmp > /tmp/wtmp - last -f /tmp/wtmp - -=head1 OPTIONS - -=over 4 - -=cut - -my $help; - -=item B<--help> - -Display brief help. - -=cut - -my $version; - -=item B<--version> - -Display version number and exit. - -=cut - -my $uri; - -=item B<--connect URI> | B<-c URI> - -If using libvirt, connect to the given I<URI>. If omitted, then we -connect to the default libvirt hypervisor. - -If you specify guest block devices directly, then libvirt is not used -at all. - -=cut - -my $format; - -=item B<--format> raw - -Specify the format of disk images given on the command line. If this -is omitted then the format is autodetected from the content of the -disk image. - -If disk images are requested from libvirt, then this program asks -libvirt for this information. In this case, the value of the format -parameter is ignored. - -If working with untrusted raw-format guest disk images, you should -ensure the format is always specified. - -=back - -=cut - -GetOptions ("help|?" => \$help, - "version" => \$version, - "connect|c=s" => \$uri, - "format=s" => \$format, - ) or pod2usage (2); -pod2usage (1) if $help; -if ($version) { - my $g = Sys::Guestfs->new (); - my %h = $g->version (); - print "$h{major}.$h{minor}.$h{release}$h{extra}\n"; - exit -} - -pod2usage (__"virt-cat: no image, VM names or filenames to cat given") - if @ARGV <= 1; - -my $filename = pop @ARGV; - -my $g; -if ($uri) { - $g = open_guest (\@ARGV, address => $uri, format => $format); -} else { - $g = open_guest (\@ARGV, format => $format); -} - -$g->launch (); - -my @roots = $g->inspect_os (); -if (@roots == 0) { - die __x("{prog}: No operating system could be detected inside this disk image.\n\nThis may be because the file is not a disk image, or is not a virtual machine\nimage, or because the OS type is not understood by libguestfs.\n\nIf you feel this is an error, please file a bug report including as much\ninformation about the disk image as possible.\n", - prog => basename ($0)); -} -if (@roots > 1) { - die __x("{prog}: multiboot operating systems are not supported.\n", - prog => basename ($0)) -} -my %fses = $g->inspect_get_mountpoints ($roots[0]); -my @fses = sort { length $a <=> length $b } keys %fses; -foreach (@fses) { - $g->mount_ro ($fses{$_}, $_); -} - -# Allow this to fail in case eg. the file does not exist. -# NB: https://bugzilla.redhat.com/show_bug.cgi?id=501888 -print $g->download($filename, "/dev/stdout"); - -=head1 SHELL QUOTING - -Libvirt guest names can contain arbitrary characters, some of which -have meaning to the shell such as C<#> and space. You may need to -quote or escape these characters on the command line. See the shell -manual page L<sh(1)> for details. - -=head1 SEE ALSO - -L<guestfs(3)>, -L<guestfish(1)>, -L<virt-edit(1)>, -L<Sys::Guestfs(3)>, -L<Sys::Guestfs::Lib(3)>, -L<Sys::Virt(3)>, -L<http://libguestfs.org/>. - -=head1 AUTHOR - -Richard W.M. Jones L<http://people.redhat.com/~rjones/> - -=head1 COPYRIGHT - -Copyright (C) 2009 Red Hat Inc. - -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |