2 # Copyright (C) 2009 Red Hat Inc.
4 # This library is free software; you can redistribute it and/or
5 # modify it under the terms of the GNU Lesser General Public
6 # License as published by the Free Software Foundation; either
7 # version 2 of the License, or (at your option) any later version.
9 # This library is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 # Lesser General Public License for more details.
14 # You should have received a copy of the GNU Lesser General Public
15 # License along with this library; if not, write to the Free Software
16 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 package Sys::Guestfs::Lib;
24 use File::Temp qw/tempdir/;
25 use Locale::TextDomain 'libguestfs';
28 eval "use Sys::Virt;";
29 eval "use XML::XPath;";
30 eval "use XML::XPath::XMLParser;";
36 Sys::Guestfs::Lib - Useful functions for using libguestfs from Perl
40 use Sys::Guestfs::Lib qw(open_guest inspect_all_partitions ...);
42 $g = open_guest ($name);
44 %fses = inspect_all_partitions ($g, \@partitions);
46 (and many more calls - see the rest of this manpage)
50 C<Sys::Guestfs::Lib> is an extra library of useful functions for using
51 the libguestfs API from Perl. It also provides tighter integration
54 The basic libguestfs API is not covered by this manpage. Please refer
55 instead to L<Sys::Guestfs(3)> and L<guestfs(3)>. The libvirt API is
56 also not covered. For that, see L<Sys::Virt(3)>.
58 =head1 BASIC FUNCTIONS
64 use vars qw(@EXPORT_OK @ISA);
67 @EXPORT_OK = qw(open_guest get_partitions resolve_windows_path
68 inspect_all_partitions inspect_partition
69 inspect_operating_systems mount_operating_system inspect_in_detail);
73 $g = open_guest ($name);
75 $g = open_guest ($name, rw => 1, ...);
77 $g = open_guest ($name, address => $uri, ...);
79 $g = open_guest ([$img1, $img2, ...], address => $uri, ...);
81 ($g, $conn, $dom) = open_guest ($name);
83 This function opens a libguestfs handle for either the libvirt domain
84 called C<$name>, or the disk image called C<$name>. Any disk images
85 found through libvirt or specified explicitly are attached to the
88 The C<Sys::Guestfs> handle C<$g> is returned, or if there was an error
89 it throws an exception. To catch errors, wrap the call in an eval
92 The first parameter is either a string referring to a libvirt domain
93 or a disk image, or (if a guest has several disk images) an arrayref
94 C<[$img1, $img2, ...]>.
96 The handle is I<read-only> by default. Use the optional parameter
97 C<rw =E<gt> 1> to open a read-write handle. However if you open a
98 read-write handle, this function will refuse to use active libvirt
101 The handle is still in the config state when it is returned, so you
102 have to call C<$g-E<gt>launch ()> and C<$g-E<gt>wait_ready>.
104 The optional C<address> parameter can be added to specify the libvirt
105 URI. In addition, L<Sys::Virt(3)> lists other parameters which are
106 passed through to C<Sys::Virt-E<gt>new> unchanged.
108 The implicit libvirt handle is closed after this function, I<unless>
109 you call the function in C<wantarray> context, in which case the
110 function returns a tuple of: the open libguestfs handle, the open
111 libvirt handle, and the open libvirt domain handle. (This is useful
112 if you want to do other things like pulling the XML description of the
113 guest). Note that if this is a straight disk image, then C<$conn> and
114 C<$dom> will be C<undef>.
116 If the C<Sys::Virt> module is not available, then libvirt is bypassed,
117 and this function can only open disk images.
127 my $readwrite = $params{rw};
130 if (ref ($first) eq "ARRAY") {
132 } elsif (ref ($first) eq "SCALAR") {
135 die __"open_guest: first parameter must be a string or an arrayref"
142 die __x("guest image {imagename} does not exist or is not readable",
147 die __"open_guest: no libvirt support (install Sys::Virt, XML::XPath and XML::XPath::XMLParser)"
148 unless exists $INC{"Sys/Virt.pm"} &&
149 exists $INC{"XML/XPath.pm"} &&
150 exists $INC{"XML/XPath/XMLParser.pm"};
152 die __"open_guest: too many domains listed on command line"
155 $conn = Sys::Virt->new (readonly => 1, @_);
156 die __"open_guest: cannot connect to libvirt" unless $conn;
158 my @doms = $conn->list_defined_domains ();
159 my $isitinactive = 1;
160 unless ($readwrite) {
161 # In the case where we want read-only access to a domain,
162 # allow the user to specify an active domain too.
163 push @doms, $conn->list_domains ();
167 if ($_->get_name () eq $images[0]) {
175 die __x("{imagename} is not the name of an inactive libvirt domain\n",
176 imagename => $images[0]);
178 die __x("{imagename} is not the name of a libvirt domain\n",
179 imagename => $images[0]);
183 # Get the names of the image(s).
184 my $xml = $dom->get_xml_description ();
186 my $p = XML::XPath->new (xml => $xml);
187 my @disks = $p->findnodes ('//devices/disk/source/@dev');
188 push (@disks, $p->findnodes ('//devices/disk/source/@file'));
190 die __x("{imagename} seems to have no disk devices\n",
191 imagename => $images[0])
194 @images = map { $_->getData } @disks;
197 # We've now got the list of @images, so feed them to libguestfs.
198 my $g = Sys::Guestfs->new ();
203 $g->add_drive_ro ($_);
207 return wantarray ? ($g, $conn, $dom) : $g
210 =head2 get_partitions
212 @partitions = get_partitions ($g);
214 This function takes an open libguestfs handle C<$g> and returns all
215 partitions and logical volumes found on it.
217 What is returned is everything that could contain a filesystem (or
218 swap). Physical volumes are excluded from the list, and so are any
219 devices which are partitioned (eg. C</dev/sda> would not be returned
220 if C</dev/sda1> exists).
228 my @partitions = $g->list_partitions ();
229 my @pvs = $g->pvs ();
230 @partitions = grep { ! _is_pv ($_, @pvs) } @partitions;
232 my @lvs = $g->lvs ();
234 return sort (@lvs, @partitions);
242 return 1 if $_ eq $t;
247 =head2 resolve_windows_path
249 $path = resolve_windows_path ($g, $path);
251 $path = resolve_windows_path ($g, "/windows/system");
252 ==> "/WINDOWS/System"
253 or undef if no path exists
255 This function, which is specific to FAT/NTFS filesystems (ie. Windows
256 guests), lets you look up a case insensitive C<$path> in the
257 filesystem and returns the true, case sensitive path as required by
258 the underlying kernel or NTFS-3g driver.
260 If C<$path> does not exist then this function returns C<undef>.
262 The C<$path> parameter must begin with C</> character and be separated
263 by C</> characters. Do not use C<\>, drive names, etc.
267 sub resolve_windows_path
273 if (substr ($path, 0, 1) ne "/") {
274 warn __"resolve_windows_path: path must start with a / character";
278 my @elems = split (/\//, $path);
281 # Start reconstructing the path at the top.
284 foreach my $dir (@elems) {
286 foreach ($g->ls ($path)) {
287 if (lc ($_) eq lc ($dir)) {
297 return undef unless $found;
303 =head1 OPERATING SYSTEM INSPECTION FUNCTIONS
305 The functions in this section can be used to inspect the operating
306 system(s) available inside a virtual machine image. For example, you
307 can find out if the VM is Linux or Windows, how the partitions are
308 meant to be mounted, and what applications are installed.
310 If you just want a simple command-line interface to this
311 functionality, use the L<virt-inspector(1)> tool. The documentation
312 below covers the case where you want to access this functionality from
315 Once you have the list of partitions (from C<get_partitions>) there
316 are several steps involved:
322 Look at each partition separately and find out what is on it.
324 The information you get back includes whether the partition contains a
325 filesystem or swapspace, what sort of filesystem (eg. ext3, ntfs), and
326 a first pass guess at the content of the filesystem (eg. Linux boot,
329 The result of this step is a C<%fs> hash of information, one hash for
332 See: C<inspect_partition>, C<inspect_all_partitions>
336 Work out the relationship between partitions.
338 In this step we work out how partitions are related to each other. In
339 the case of a single-boot VM, we work out how the partitions are
340 mounted in respect of each other (eg. C</dev/sda1> is mounted as
341 C</boot>). In the case of a multi-boot VM where there are several
342 roots, we may identify several operating system roots, and mountpoints
345 The result of this step is a single hash called C<%oses> which is
346 described in more detail below, but at the top level looks like:
349 '/dev/VG/Root1' => \%os1,
350 '/dev/VG/Root2' => \%os2,
356 '/' => '/dev/VG/Root1',
357 '/boot' => '/dev/sda1',
362 (example shows a multi-boot VM containing two root partitions).
364 See: C<inspect_operating_systems>
370 Previous to this point we've essentially been looking at each
371 partition in isolation. Now we construct a true guest filesystem by
372 mounting up all of the disks. Only once everything is mounted up can
373 we run commands in the OS context to do more detailed inspection.
375 See: C<mount_operating_system>
379 Check for kernels and applications.
381 This step now does more detailed inspection, where we can look for
382 kernels, applications and more installed in the guest.
384 The result of this is an enhanced C<%os> hash.
386 See: C<inspect_in_detail>
392 This library does not contain functions for generating output based on
393 the analysis steps above. Use a command line tool such as
394 L<virt-inspector(1)> to get useful output.
398 =head2 inspect_all_partitions
400 %fses = inspect_all_partitions ($g, \@partitions);
402 %fses = inspect_all_partitions ($g, \@partitions, use_windows_registry => 1);
404 This calls C<inspect_partition> for each partition in the list
407 The result is a hash which maps partition name to C<\%fs> hashref.
409 The contents of the C<%fs> hash and the meaning of the
410 C<use_windows_registry> flag are explained below.
414 sub inspect_all_partitions
420 return map { $_ => inspect_partition ($g, $_, @_) } @parts;
423 =head2 inspect_partition
425 \%fs = inspect_partition ($g, $partition);
427 \%fs = inspect_partition ($g, $partition, use_windows_registry => 1);
429 This function inspects the device named C<$partition> in isolation and
430 tries to determine what it is. It returns information such as whether
431 the partition is formatted, and with what, whether it is mountable,
432 and what it appears to contain (eg. a Windows root, or a Linux /usr).
434 If C<use_windows_registry> is set to 1, then we will try to download
435 and parse the content of the Windows registry (for Windows root
436 devices). However since this is an expensive and error-prone
437 operation, we don't do this by default. It also requires the external
438 program C<reged>, patched to remove numerous crashing bugs in the
441 The returned value is a hashref C<\%fs> which may contain the
442 following top-level keys (any key can be missing):
448 Filesystem type, eg. "ext2" or "ntfs"
452 Apparent filesystem OS, eg. "linux" or "windows"
456 If set, the partition is a swap partition.
468 If set, the partition could be mounted by libguestfs.
472 Filesystem content, if we could determine it. One of: "linux-grub",
473 "linux-root", "linux-usrlocal", "linux-usr", "windows-root".
477 (For Linux root partitions only).
478 Operating system distribution. One of: "fedora", "rhel", "centos",
479 "scientific", "debian".
483 (For Linux root partitions only)
484 Operating system distribution family. One of: "redhat", "debian".
488 (For root partitions only).
489 Operating system version.
493 (For Linux root partitions only).
494 The contents of the C</etc/fstab> file.
498 (For Windows root partitions only).
499 The contents of the C</boot.ini> (NTLDR) file.
503 The value is an arrayref, which is a list of Windows registry
504 file contents, in Windows C<.REG> format.
510 sub inspect_partition
514 my $dev = shift; # LV or partition name.
517 my $use_windows_registry = $params{use_windows_registry};
519 my %r; # Result hash.
521 # First try 'file(1)' on it.
522 my $file = $g->file ($dev);
523 if ($file =~ /ext2 filesystem data/) {
526 } elsif ($file =~ /ext3 filesystem data/) {
529 } elsif ($file =~ /ext4 filesystem data/) {
532 } elsif ($file =~ m{Linux/i386 swap file}) {
538 # If it's ext2/3/4, then we want the UUID and label.
539 if (exists $r{fstype} && $r{fstype} =~ /^ext/) {
540 $r{uuid} = $g->get_e2uuid ($dev);
541 $r{label} = $g->get_e2label ($dev);
544 # Try mounting it, fnarrr.
546 $r{is_mountable} = 1;
547 eval { $g->mount_ro ($dev, "/") };
549 # It's not mountable, probably empty or some format
550 # we don't understand.
551 $r{is_mountable} = 0;
556 if ($g->is_file ("/grub/menu.lst") ||
557 $g->is_file ("/grub/grub.conf")) {
558 $r{content} = "linux-grub";
559 _check_grub ($g, \%r);
564 if ($g->is_dir ("/etc") && $g->is_dir ("/bin") &&
565 $g->is_file ("/etc/fstab")) {
566 $r{content} = "linux-root";
568 _check_linux_root ($g, \%r);
573 if ($g->is_dir ("/etc") && $g->is_dir ("/bin") &&
574 $g->is_dir ("/share") && !$g->exists ("/local") &&
575 !$g->is_file ("/etc/fstab")) {
576 $r{content} = "linux-usrlocal";
581 if ($g->is_dir ("/etc") && $g->is_dir ("/bin") &&
582 $g->is_dir ("/share") && $g->exists ("/local") &&
583 !$g->is_file ("/etc/fstab")) {
584 $r{content} = "linux-usr";
589 if ($g->is_file ("/AUTOEXEC.BAT") ||
590 $g->is_file ("/autoexec.bat") ||
591 $g->is_dir ("/Program Files") ||
592 $g->is_dir ("/WINDOWS") ||
593 $g->is_file ("/boot.ini") ||
594 $g->is_file ("/ntldr")) {
595 $r{fstype} = "ntfs"; # XXX this is a guess
596 $r{fsos} = "windows";
597 $r{content} = "windows-root";
599 _check_windows_root ($g, \%r, $use_windows_registry);
609 sub _check_linux_root
615 # Look into /etc to see if we recognise the operating system.
616 if ($g->is_file ("/etc/redhat-release")) {
617 $r->{osdistrofamily} = "redhat";
619 $_ = $g->cat ("/etc/redhat-release");
620 if (/Fedora release (\d+\.\d+)/) {
621 $r->{osdistro} = "fedora";
622 $r->{osversion} = "$1"
625 elsif (/(Red Hat Enterprise Linux|CentOS|Scientific Linux)/) {
628 if($distro eq "Red Hat Enterprise Linux") {
629 $r->{osdistro} = "rhel";
632 elsif($distro eq "CentOS") {
633 $r->{osdistro} = "centos";
636 elsif($distro eq "Scientific Linux") {
637 $r->{osdistro} = "scientific";
640 # Shouldn't be possible
643 if (/$distro.*release (\d+).*Update (\d+)/) {
644 $r->{osversion} = "$1.$2";
647 elsif (/$distro.*release (\d+(?:\.(?:\d+))?)/) {
648 $r->{osversion} = "$1";
653 $r->{osdistro} = "redhat-based";
655 } elsif ($g->is_file ("/etc/debian_version")) {
656 $r->{osdistrofamily} = "debian";
658 $_ = $g->cat ("/etc/debian_version");
660 $r->{osdistro} = "debian";
661 $r->{osversion} = "$1";
663 $r->{osdistro} = "debian";
667 # Parse the contents of /etc/fstab. This is pretty vital so
668 # we can determine where filesystems are supposed to be mounted.
669 eval "\$_ = \$g->cat ('/etc/fstab');";
671 my @lines = split /\n/;
674 my @fields = split /[ \t]+/;
676 my $spec = $fields[0]; # first column (dev/label/uuid)
677 my $file = $fields[1]; # second column (mountpoint)
678 if ($spec =~ m{^/} ||
679 $spec =~ m{^LABEL=} ||
680 $spec =~ m{^UUID=} ||
682 push @fstab, [$spec, $file]
686 $r->{fstab} = \@fstab if @fstab;
690 # We only support NT. The control file /boot.ini contains a list of
691 # Windows installations and their %systemroot%s in a simple text
694 # XXX We could parse this better. This won't work if /boot.ini is on
695 # a different drive from the %systemroot%, and in other unusual cases.
697 sub _check_windows_root
702 my $use_windows_registry = shift;
704 my $boot_ini = resolve_windows_path ($g, "/boot.ini");
705 $r->{boot_ini} = $boot_ini;
707 if (defined $r->{boot_ini}) {
708 $_ = $g->cat ($boot_ini);
709 my @lines = split /\n/;
715 } elsif (m/^default=.*?\\(\w+)$/i) {
718 } elsif (m/\\(\w+)=/) {
724 if (defined $systemroot) {
725 $r->{systemroot} = resolve_windows_path ($g, "/$systemroot");
726 if (defined $r->{systemroot} && $use_windows_registry) {
727 _check_windows_registry ($g, $r, $r->{systemroot});
733 sub _check_windows_registry
738 my $systemroot = shift;
740 # Download the system registry files. Only download the
741 # interesting ones, and we don't bother with user profiles at all.
743 my $configdir = resolve_windows_path ($g, "$systemroot/system32/config");
744 if (defined $configdir) {
745 my $softwaredir = resolve_windows_path ($g, "$configdir/software");
746 if (defined $softwaredir) {
747 _load_windows_registry ($g, $r, $softwaredir,
748 "HKEY_LOCAL_MACHINE\\SOFTWARE");
750 my $systemdir = resolve_windows_path ($g, "$configdir/system");
751 if (defined $systemdir) {
752 _load_windows_registry ($g, $r, $systemdir,
753 "HKEY_LOCAL_MACHINE\\System");
758 sub _load_windows_registry
766 my $dir = tempdir (CLEANUP => 1);
768 $g->download ($regfile, "$dir/reg");
770 # 'reged' command is particularly noisy. Redirect stdout and
771 # stderr to /dev/null temporarily.
772 open SAVEOUT, ">&STDOUT";
773 open SAVEERR, ">&STDERR";
774 open STDOUT, ">/dev/null";
775 open STDERR, ">/dev/null";
777 my @cmd = ("reged", "-x", "$dir/reg", "$prefix", "\\", "$dir/out");
778 my $res = system (@cmd);
782 open STDOUT, ">&SAVEOUT";
783 open STDERR, ">&SAVEERR";
788 warn __x("reged command failed: {errormsg}", errormsg => $?);
792 # Some versions of reged segfault on inputs. If that happens we
793 # may get no / partial output file. Anyway, if it exists, load
796 unless (open F, "$dir/out") {
797 warn __x("no output from reged command: {errormsg}", errormsg => $!);
800 { local $/ = undef; $content = <F>; }
804 @registry = @{$r->{registry}} if exists $r->{registry};
805 push @registry, $content;
806 $r->{registry} = \@registry;
815 # Grub version, if we care.
818 =head2 inspect_operating_systems
820 \%oses = inspect_operating_systems ($g, \%fses);
822 This function works out how partitions are related to each other. In
823 the case of a single-boot VM, we work out how the partitions are
824 mounted in respect of each other (eg. C</dev/sda1> is mounted as
825 C</boot>). In the case of a multi-boot VM where there are several
826 roots, we may identify several operating system roots, and mountpoints
829 This function returns a hashref C<\%oses> which at the top level looks
833 '/dev/VG/Root' => \%os,
836 (There can be multiple roots for a multi-boot VM).
838 The C<\%os> hash contains the following keys (any can be omitted):
844 Operating system type, eg. "linux", "windows".
848 Operating system distribution, eg. "debian".
852 Operating system version, eg. "4.0".
856 The value is a reference to the root partition C<%fs> hash.
860 The value is the name of the root partition (as a string).
865 The value is a hashref like this:
868 '/' => '/dev/VG/Root',
869 '/boot' => '/dev/sda1',
874 Filesystems (including swap devices and unmounted partitions).
875 The value is a hashref like this:
879 '/dev/VG/Root' => \%fs,
880 '/dev/VG/Swap' => \%fs,
887 sub inspect_operating_systems
895 foreach (sort keys %$fses) {
896 if ($fses->{$_}->{is_root}) {
901 _get_os_version ($g, \%r);
902 _assign_mount_points ($g, $fses, \%r);
916 $r->{os} = $r->{root}->{fsos} if exists $r->{root}->{fsos};
917 $r->{distro} = $r->{root}->{osdistro} if exists $r->{root}->{osdistro};
918 $r->{distrofamily} = $r->{root}->{osdistrofamily}
919 if exists $r->{root}->{osdistrofamily};
920 $r->{version} = $r->{root}->{osversion} if exists $r->{root}->{osversion};
923 sub _assign_mount_points
930 $r->{mounts} = { "/" => $r->{root_device} };
931 $r->{filesystems} = { $r->{root_device} => $r->{root} };
933 # Use /etc/fstab if we have it to mount the rest.
934 if (exists $r->{root}->{fstab}) {
935 my @fstab = @{$r->{root}->{fstab}};
937 my ($spec, $file) = @$_;
939 my ($dev, $fs) = _find_filesystem ($g, $fses, $spec);
941 $r->{mounts}->{$file} = $dev;
942 $r->{filesystems}->{$dev} = $fs;
943 if (exists $fs->{used}) {
954 # Find filesystem by device name, LABEL=.. or UUID=..
963 foreach (sort keys %$fses) {
964 if (exists $fses->{$_}->{label} &&
965 $fses->{$_}->{label} eq $label) {
966 return ($_, $fses->{$_});
969 warn __x("unknown filesystem label {label}\n", label => $label);
971 } elsif (/^UUID=(.*)/) {
973 foreach (sort keys %$fses) {
974 if (exists $fses->{$_}->{uuid} &&
975 $fses->{$_}->{uuid} eq $uuid) {
976 return ($_, $fses->{$_});
979 warn __x("unknown filesystem UUID {uuid}\n", uuid => $uuid);
982 return ($_, $fses->{$_}) if exists $fses->{$_};
984 # The following is to handle the case where an fstab entry specifies a
985 # specific device rather than its label or uuid, and the libguestfs
986 # appliance has named the device differently due to the use of a
988 # This will work as long as the underlying drivers recognise devices in
990 if (m{^/dev/hd(.*)} && exists $fses->{"/dev/sd$1"}) {
991 return ("/dev/sd$1", $fses->{"/dev/sd$1"});
993 if (m{^/dev/xvd(.*)} && exists $fses->{"/dev/sd$1"}) {
994 return ("/dev/sd$1", $fses->{"/dev/sd$1"});
996 if (m{^/dev/mapper/(.*)-(.*)$} && exists $fses->{"/dev/$1/$2"}) {
997 return ("/dev/$1/$2", $fses->{"/dev/$1/$2"});
1000 return () if m{/dev/cdrom};
1002 warn __x("unknown filesystem {fs}\n", fs => $_);
1007 =head2 mount_operating_system
1009 mount_operating_system ($g, \%os);
1011 This function mounts the operating system described in the
1012 C<%os> hash according to the C<mounts> table in that hash (see
1013 C<inspect_operating_systems>).
1015 The partitions are mounted read-only.
1017 To reverse the effect of this call, use the standard
1018 libguestfs API call C<$g-E<gt>umount_all ()>.
1022 sub mount_operating_system
1028 my $mounts = $os->{mounts};
1030 # Have to mount / first. Luckily '/' is early in the ASCII
1031 # character set, so this should be OK.
1032 foreach (sort keys %$mounts) {
1033 $g->mount_ro ($mounts->{$_}, $_)
1034 if $_ ne "swap" && $_ ne "none" && ($_ eq '/' || $g->is_dir ($_));
1038 =head2 inspect_in_detail
1040 mount_operating_system ($g, \%os);
1041 inspect_in_detail ($g, \%os);
1044 The C<inspect_in_detail> function inspects the mounted operating
1045 system for installed applications, installed kernels, kernel modules
1048 It adds extra keys to the existing C<%os> hash reflecting what it
1049 finds. These extra keys are:
1055 List of applications.
1061 =item modprobe_aliases
1064 The contents of the modprobe configuration.
1066 =item initrd_modules
1069 The kernel modules installed in the initrd. The value is
1070 a hashref of kernel version to list of modules.
1076 sub inspect_in_detail
1082 _check_for_applications ($g, $os);
1083 _check_for_kernels ($g, $os);
1084 if ($os->{os} eq "linux") {
1085 _check_for_modprobe_aliases ($g, $os);
1086 _check_for_initrd ($g, $os);
1090 sub _check_for_applications
1098 my $osn = $os->{os};
1099 if ($osn eq "linux") {
1100 my $family = $os->{distrofamily};
1101 if (defined $family && $family eq "redhat") {
1102 my @lines = $g->command_lines
1105 "--qf", "%{name} %{epoch} %{version} %{release} %{arch}\n"]);
1107 if (m/^(.*) (.*) (.*) (.*) (.*)$/) {
1109 $epoch = "" if $epoch eq "(none)";
1121 } elsif ($osn eq "windows") {
1123 # I worked out a general plan for this, but haven't
1124 # implemented it yet. We can iterate over /Program Files
1125 # looking for *.EXE files, which we download, then use
1126 # i686-pc-mingw32-windres on, to find the VERSIONINFO
1127 # section, which has a lot of useful information.
1130 $os->{apps} = \@apps;
1133 sub _check_for_kernels
1141 my $osn = $os->{os};
1142 if ($osn eq "linux") {
1143 # Installed kernels will have a corresponding /lib/modules/<version>
1144 # directory, which is the easiest way to find out what kernels
1145 # are installed, and what modules are available.
1146 foreach ($g->ls ("/lib/modules")) {
1147 if ($g->is_dir ("/lib/modules/$_")) {
1149 $kernel{version} = $_;
1153 foreach ($g->find ("/lib/modules/$_")) {
1154 if (m,/([^/]+)\.ko$, || m,([^/]+)\.o$,) {
1159 $kernel{modules} = \@modules;
1161 push @kernels, \%kernel;
1165 } elsif ($osn eq "windows") {
1169 $os->{kernels} = \@kernels;
1172 # Check /etc/modprobe.conf to see if there are any specified
1173 # drivers associated with network (ethX) or hard drives. Normally
1174 # one might find something like:
1177 # alias scsi_hostadapter xenblk
1179 # XXX This doesn't look beyond /etc/modprobe.conf, eg. in /etc/modprobe.d/
1181 sub _check_for_modprobe_aliases
1189 $success = $g->aug_init("/", 16);
1191 # Register /etc/modules.conf and /etc/conf.modules to the Modprobe lens
1193 @results = $g->aug_match("/augeas/load/Modprobe/incl");
1195 # Calculate the next index of /augeas/load/Modprobe/incl
1197 foreach ( @results ) {
1198 next unless m{/augeas/load/Modprobe/incl\[(\d*)]};
1199 $i = $1 + 1 if ($1 == $i);
1202 $success = $g->aug_set("/augeas/load/Modprobe/incl[$i]",
1203 "/etc/modules.conf");
1205 $success = $g->aug_set("/augeas/load/Modprobe/incl[$i]",
1206 "/etc/conf.modules");
1208 # Make augeas reload
1209 $success = $g->aug_load();
1211 my %modprobe_aliases;
1213 for my $pattern qw(/files/etc/conf.modules/alias
1214 /files/etc/modules.conf/alias
1215 /files/etc/modprobe.conf/alias
1216 /files/etc/modprobe.d/*/alias) {
1217 @results = $g->aug_match($pattern);
1219 for my $path ( @results ) {
1220 $path =~ m{^/files(.*)/alias(?:\[\d*\])?$}
1221 or die __x("{path} doesn't match augeas pattern",
1226 $alias = $g->aug_get($path);
1229 $modulename = $g->aug_get($path.'/modulename');
1232 $aliasinfo{modulename} = $modulename;
1233 $aliasinfo{augeas} = $path;
1234 $aliasinfo{file} = $file;
1236 $modprobe_aliases{$alias} = \%aliasinfo;
1240 $os->{modprobe_aliases} = \%modprobe_aliases;
1243 # Get a listing of device drivers in any initrd corresponding to a
1244 # kernel. This is an indication of what can possibly be booted.
1246 sub _check_for_initrd
1254 foreach my $initrd ($g->ls ("/boot")) {
1255 if ($initrd =~ m/^initrd-(.*)\.img$/ && $g->is_file ("/boot/$initrd")) {
1259 # Disregard old-style compressed ext2 files, since cpio
1260 # takes ages to (fail to) process these.
1261 if ($g->file ("/boot/$initrd") !~ /gzip compressed/ ||
1262 $g->zfile ("gzip", "/boot/$initrd") !~ /ext2 filesystem/) {
1264 @modules = $g->initrd_list ("/boot/$initrd");
1267 @modules = grep { m,([^/]+)\.ko$, || m,([^/]+)\.o$, }
1269 $initrd_modules{$version} = \@modules
1271 warn __x("{filename}: could not read initrd format",
1272 filename => "/boot/$initrd");
1278 $os->{initrd_modules} = \%initrd_modules;
1286 Copyright (C) 2009 Red Hat Inc.
1290 Please see the file COPYING.LIB for the full license.
1294 L<virt-inspector(1)>,
1297 L<http://libguestfs.org/>,
1299 L<http://libvirt.org/>,