3 # Copyright (C) 2009 Red Hat Inc.
5 # This program is free software; you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 2 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software
17 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 use File::Temp qw/tempdir/;
30 eval "use Sys::Virt;";
31 eval "use XML::XPath;";
32 eval "use XML::XPath::XMLParser;";
33 eval "use YAML::Any;";
39 virt-inspector - Display OS version, kernel, drivers, mount points, applications, etc. in a virtual machine
43 virt-inspector [--connect URI] domname
45 virt-inspector guest.img [guest.img ...]
49 B<virt-inspector> examines a virtual machine and tries to determine
50 the version of the OS, the kernel version, what drivers are installed,
51 whether the virtual machine is fully virtualized (FV) or
52 para-virtualized (PV), what applications are installed and more.
54 Virt-inspector can produce output in several formats, including a
55 readable text report, and XML for feeding into other programs.
57 Virt-inspector should only be run on I<inactive> virtual machines.
58 The program tries to determine that the machine is inactive and will
59 refuse to run if it thinks you are trying to inspect a running domain.
61 In the normal usage, use C<virt-inspector domname> where C<domname> is
62 the libvirt domain (see: C<virsh list --all>).
64 You can also run virt-inspector directly on disk images from a single
65 virtual machine. Use C<virt-inspector guest.img>. In rare cases a
66 domain has several block devices, in which case you should list them
67 one after another, with the first corresponding to the guest's
68 C</dev/sda>, the second to the guest's C</dev/sdb> and so on.
70 Virt-inspector can only inspect and report upon I<one domain at a
71 time>. To inspect several virtual machines, you have to run
72 virt-inspector several times (for example, from a shell script
75 Because virt-inspector needs direct access to guest images, it won't
76 normally work over remote libvirt connections.
94 =item B<--connect URI> | B<-c URI>
96 If using libvirt, connect to the given I<URI>. If omitted,
97 then we connect to the default libvirt hypervisor.
99 Libvirt is only used if you specify a C<domname> on the
100 command line. If you specify guest block devices directly,
101 then libvirt is not used at all.
109 Force reading a particular guest even if it appears to be active. In
110 earlier versions of virt-inspector, this could be dangerous (for
111 example, corrupting the guest's disk image). However in more recent
112 versions, it should not cause corruption, but might cause
113 virt-inspector to crash or produce incorrect results.
121 The following options select the output format. Use only one of them.
122 The default is a readable text report.
126 =item B<--text> (default)
132 Produce no output at all.
136 If you select I<--xml> then you get XML output which can be fed
141 If you select I<--yaml> then you get YAML output which can be fed
146 If you select I<--perl> then you get Perl structures output which
147 can be used directly in another Perl program.
153 If you select I<--fish> then we print a L<guestfish(1)> command
154 line which will automatically mount up the filesystems on the
155 correct mount points. Try this for example:
157 guestfish $(virt-inspector --fish guest.img)
159 I<--ro-fish> is the same, but the I<--ro> option is passed to
160 guestfish so that the filesystems are mounted read-only.
164 In "query mode" we answer common questions about the guest, such
165 as whether it is fullvirt or needs a Xen hypervisor to run.
167 See section I<QUERY MODE> below.
171 my $windows_registry;
173 =item B<--windows-registry>
175 If this item is passed, I<and> the guest is Windows, I<and> the
176 external program C<reged> is available (see SEE ALSO section), then we
177 attempt to parse the Windows registry. This allows much more
178 information to be gathered for Windows guests.
180 This is quite an expensive and slow operation, so we don't do it by
187 GetOptions ("help|?" => \$help,
188 "connect|c=s" => \$uri,
190 "text" => sub { $output = "text" },
191 "none" => sub { $output = "none" },
192 "xml" => sub { $output = "xml" },
193 "yaml" => sub { $output = "yaml" },
194 "perl" => sub { $output = "perl" },
195 "fish" => sub { $output = "fish" },
196 "guestfish" => sub { $output = "fish" },
197 "ro-fish" => sub { $output = "ro-fish" },
198 "ro-guestfish" => sub { $output = "ro-fish" },
199 "query" => sub { $output = "query" },
200 "windows-registry" => \$windows_registry,
202 pod2usage (1) if $help;
203 pod2usage ("$0: no image or VM names given") if @ARGV == 0;
205 # Domain name or guest image(s)?
213 die "guest image $_ does not exist or is not readable\n"
217 die "virt-inspector: no libvirt support (install Sys::Virt, XML::XPath and XML::XPath::XMLParser)\n"
218 unless exists $INC{"Sys/Virt.pm"} &&
219 exists $INC{"XML/XPath.pm"} &&
220 exists $INC{"XML/XPath/XMLParser.pm"};
222 pod2usage ("$0: too many domains listed on command line") if @ARGV > 1;
226 $vmm = Sys::Virt->new (uri => $uri, readonly => 1);
228 $vmm = Sys::Virt->new (readonly => 1);
230 die "cannot connect to libvirt $uri\n" unless $vmm;
232 my @doms = $vmm->list_defined_domains ();
233 my $isitinactive = "an inactive libvirt domain";
234 if ($output ne "fish") {
235 # In the special case where we want read-only access to
236 # a domain, allow the user to specify an active domain too.
237 push @doms, $vmm->list_domains ();
238 $isitinactive = "a libvirt domain";
242 if ($_->get_name () eq $ARGV[0]) {
247 die "$ARGV[0] is not the name of $isitinactive\n" unless $dom;
249 # Get the names of the image(s).
250 my $xml = $dom->get_xml_description ();
252 my $p = XML::XPath->new (xml => $xml);
253 my @disks = $p->findnodes ('//devices/disk/source/@dev');
254 @images = map { $_->getData } @disks;
257 # We've now got the list of @images, so feed them to libguestfs.
258 my $g = Sys::Guestfs->new ();
259 $g->add_drive_ro ($_) foreach @images;
263 # We want to get the list of LVs and partitions (ie. anything that
264 # could contain a filesystem). Discard any partitions which are PVs.
265 my @partitions = $g->list_partitions ();
266 my @pvs = $g->pvs ();
270 return 1 if $_ eq $t;
274 @partitions = grep { ! is_pv ($_) } @partitions;
276 my @lvs = $g->lvs ();
282 Linux (distro + version)
286 +--- Filesystems ---------- Installed apps --- Kernel & drivers
287 ----------- -------------- ----------------
288 mount point => device List of apps Extra information
289 mount point => device and versions about kernel(s)
292 (plus lots of extra information
293 about each filesystem)
295 The output of virt-inspector is a complex two-level data structure.
297 At the top level is a list of the operating systems installed on the
298 guest. (For the vast majority of guests, only a single OS is
299 installed.) The data returned for the OS includes the name (Linux,
300 Windows), the distribution and version.
302 The diagram above shows what we return for each OS.
304 With the I<--xml> option the output is mapped into an XML document.
305 Unfortunately there is no clear schema for this document
306 (contributions welcome) but you can get an idea of the format by
307 looking at other documents and as a last resort the source for this
310 With the I<--fish> or I<--ro-fish> option the mount points are mapped to
311 L<guestfish(1)> command line parameters, so that you can go in
312 afterwards and inspect the guest with everything mounted in the
313 right place. For example:
315 guestfish $(virt-inspector --ro-fish guest.img)
316 ==> guestfish --ro -a guest.img -m /dev/VG/LV:/ -m /dev/sda1:/boot
320 # List of possible filesystems.
321 my @devices = sort (@lvs, @partitions);
323 # Now query each one to build up a picture of what's in it.
324 my %fses = map { $_ => check_fs ($_) } @devices;
326 # Now the complex checking code itself.
327 # check_fs takes a device name (LV or partition name) and returns
328 # a hashref containing everything we can find out about the device.
331 my $dev = shift; # LV or partition name.
333 my %r; # Result hash.
335 # First try 'file(1)' on it.
336 my $file = $g->file ($dev);
337 if ($file =~ /ext2 filesystem data/) {
340 } elsif ($file =~ /ext3 filesystem data/) {
343 } elsif ($file =~ /ext4 filesystem data/) {
346 } elsif ($file =~ m{Linux/i386 swap file}) {
352 # If it's ext2/3/4, then we want the UUID and label.
353 if (exists $r{fstype} && $r{fstype} =~ /^ext/) {
354 $r{uuid} = $g->get_e2uuid ($dev);
355 $r{label} = $g->get_e2label ($dev);
358 # Try mounting it, fnarrr.
360 $r{is_mountable} = 1;
361 eval { $g->mount_ro ($dev, "/") };
363 # It's not mountable, probably empty or some format
364 # we don't understand.
365 $r{is_mountable} = 0;
370 if ($g->is_file ("/grub/menu.lst") ||
371 $g->is_file ("/grub/grub.conf")) {
372 $r{content} = "linux-grub";
378 if ($g->is_dir ("/etc") && $g->is_dir ("/bin") &&
379 $g->is_file ("/etc/fstab")) {
380 $r{content} = "linux-root";
382 check_linux_root (\%r);
387 if ($g->is_dir ("/etc") && $g->is_dir ("/bin") &&
388 $g->is_dir ("/share") && !$g->exists ("/local") &&
389 !$g->is_file ("/etc/fstab")) {
390 $r{content} = "linux-usrlocal";
395 if ($g->is_dir ("/etc") && $g->is_dir ("/bin") &&
396 $g->is_dir ("/share") && $g->exists ("/local") &&
397 !$g->is_file ("/etc/fstab")) {
398 $r{content} = "linux-usr";
403 if ($g->is_file ("/AUTOEXEC.BAT") ||
404 $g->is_file ("/autoexec.bat") ||
405 $g->is_dir ("/Program Files") ||
406 $g->is_dir ("/WINDOWS") ||
407 $g->is_file ("/boot.ini") ||
408 $g->is_file ("/ntldr")) {
409 $r{fstype} = "ntfs"; # XXX this is a guess
410 $r{fsos} = "windows";
411 $r{content} = "windows-root";
413 check_windows_root (\%r);
428 # Look into /etc to see if we recognise the operating system.
429 if ($g->is_file ("/etc/redhat-release")) {
430 $_ = $g->cat ("/etc/redhat-release");
431 if (/Fedora release (\d+\.\d+)/) {
432 $r->{osdistro} = "fedora";
433 $r->{osversion} = "$1"
434 } elsif (/(Red Hat Enterprise Linux|CentOS|Scientific Linux).*release (\d+).*Update (\d+)/) {
435 $r->{osdistro} = "redhat";
436 $r->{osversion} = "$2.$3";
437 } elsif (/(Red Hat Enterprise Linux|CentOS|Scientific Linux).*release (\d+(?:\.(\d+))?)/) {
438 $r->{osdistro} = "redhat";
439 $r->{osversion} = "$2";
441 $r->{osdistro} = "redhat";
443 } elsif ($g->is_file ("/etc/debian_version")) {
444 $_ = $g->cat ("/etc/debian_version");
446 $r->{osdistro} = "debian";
447 $r->{osversion} = "$1";
449 $r->{osdistro} = "debian";
453 # Parse the contents of /etc/fstab. This is pretty vital so
454 # we can determine where filesystems are supposed to be mounted.
455 eval "\$_ = \$g->cat ('/etc/fstab');";
457 my @lines = split /\n/;
460 my @fields = split /[ \t]+/;
462 my $spec = $fields[0]; # first column (dev/label/uuid)
463 my $file = $fields[1]; # second column (mountpoint)
464 if ($spec =~ m{^/} ||
465 $spec =~ m{^LABEL=} ||
466 $spec =~ m{^UUID=} ||
468 push @fstab, [$spec, $file]
472 $r->{fstab} = \@fstab if @fstab;
476 # We only support NT. The control file /boot.ini contains a list of
477 # Windows installations and their %systemroot%s in a simple text
480 # XXX We could parse this better. This won't work if /boot.ini is on
481 # a different drive from the %systemroot%, and in other unusual cases.
483 sub check_windows_root
488 my $boot_ini = resolve_windows_path ("/", "boot.ini");
489 $r->{boot_ini} = $boot_ini;
491 if (defined $r->{boot_ini}) {
492 $_ = $g->cat ($boot_ini);
493 my @lines = split /\n/;
499 } elsif (m/^default=.*?\\(\w+)$/i) {
502 } elsif (m/\\(\w+)=/) {
508 if (defined $systemroot) {
509 $r->{systemroot} = resolve_windows_path ("/", $systemroot);
510 if (defined $r->{systemroot} && $windows_registry) {
511 check_windows_registry ($r, $r->{systemroot});
517 sub check_windows_registry
521 my $systemroot = shift;
523 # Download the system registry files. Only download the
524 # interesting ones, and we don't bother with user profiles at all.
525 my $system32 = resolve_windows_path ($systemroot, "system32");
526 if (defined $system32) {
527 my $config = resolve_windows_path ($system32, "config");
528 if (defined $config) {
529 my $software = resolve_windows_path ($config, "software");
530 if (defined $software) {
531 load_windows_registry ($r, $software,
532 "HKEY_LOCAL_MACHINE\\SOFTWARE");
534 my $system = resolve_windows_path ($config, "system");
535 if (defined $system) {
536 load_windows_registry ($r, $system,
537 "HKEY_LOCAL_MACHINE\\System");
543 sub load_windows_registry
550 my $dir = tempdir (CLEANUP => 1);
552 $g->download ($regfile, "$dir/reg");
554 # 'reged' command is particularly noisy. Redirect stdout and
555 # stderr to /dev/null temporarily.
556 open SAVEOUT, ">&STDOUT";
557 open SAVEERR, ">&STDERR";
558 open STDOUT, ">/dev/null";
559 open STDERR, ">/dev/null";
561 my @cmd = ("reged", "-x", "$dir/reg", "$prefix", "\\", "$dir/out");
562 my $res = system (@cmd);
566 open STDOUT, ">&SAVEOUT";
567 open STDERR, ">&SAVEERR";
572 warn "reged command failed: $?";
576 # Some versions of reged segfault on inputs. If that happens we
577 # may get no / partial output file. Anyway, if it exists, load
580 unless (open F, "$dir/out") {
581 warn "no output from reged command: $!";
584 { local $/ = undef; $content = <F>; }
588 @registry = @{$r->{registry}} if exists $r->{registry};
589 push @registry, $content;
590 $r->{registry} = \@registry;
593 # Because of case sensitivity, the actual path might have a different
594 # name, and ntfs-3g is always case sensitive. Find out what the real
595 # path is. Returns the correct full path, or undef.
596 sub resolve_windows_path
599 my $parent = shift; # Must exist, with correct case.
602 foreach ($g->ls ($parent)) {
603 if (lc ($_) eq lc ($dir)) {
604 if ($parent eq "/") {
620 # Grub version, if we care.
623 #print Dumper (\%fses);
625 #----------------------------------------------------------------------
626 # Now find out how many operating systems we've got. Usually just one.
630 foreach (sort keys %fses) {
631 if ($fses{$_}->{is_root}) {
636 get_os_version (\%r);
637 assign_mount_points (\%r);
647 $r->{os} = $r->{root}->{fsos} if exists $r->{root}->{fsos};
648 $r->{distro} = $r->{root}->{osdistro} if exists $r->{root}->{osdistro};
649 $r->{version} = $r->{root}->{osversion} if exists $r->{root}->{osversion};
652 sub assign_mount_points
657 $r->{mounts} = { "/" => $r->{root_device} };
658 $r->{filesystems} = { $r->{root_device} => $r->{root} };
660 # Use /etc/fstab if we have it to mount the rest.
661 if (exists $r->{root}->{fstab}) {
662 my @fstab = @{$r->{root}->{fstab}};
664 my ($spec, $file) = @$_;
666 my ($dev, $fs) = find_filesystem ($spec);
668 $r->{mounts}->{$file} = $dev;
669 $r->{filesystems}->{$dev} = $fs;
670 if (exists $fs->{used}) {
681 # Find filesystem by device name, LABEL=.. or UUID=..
688 foreach (sort keys %fses) {
689 if (exists $fses{$_}->{label} &&
690 $fses{$_}->{label} eq $label) {
691 return ($_, $fses{$_});
694 warn "unknown filesystem label $label\n";
696 } elsif (/^UUID=(.*)/) {
698 foreach (sort keys %fses) {
699 if (exists $fses{$_}->{uuid} &&
700 $fses{$_}->{uuid} eq $uuid) {
701 return ($_, $fses{$_});
704 warn "unknown filesystem UUID $uuid\n";
707 return ($_, $fses{$_}) if exists $fses{$_};
709 # The following is to handle the case where an fstab entry specifies a
710 # specific device rather than its label or uuid, and the libguestfs
711 # appliance has named the device differently due to the use of a
713 # This will work as long as the underlying drivers recognise devices in
715 if (m{^/dev/hd(.*)} && exists $fses{"/dev/sd$1"}) {
716 return ("/dev/sd$1", $fses{"/dev/sd$1"});
718 if (m{^/dev/xvd(.*)} && exists $fses{"/dev/sd$1"}) {
719 return ("/dev/sd$1", $fses{"/dev/sd$1"});
722 return () if m{/dev/cdrom};
724 warn "unknown filesystem $_\n";
729 #print Dumper(\%oses);
731 #----------------------------------------------------------------------
732 # Mount up the disks so we can check for applications
733 # and kernels. Skip this if the output is "*fish" because
734 # we don't need to know.
736 if ($output !~ /.*fish$/) {
738 foreach $root_dev (sort keys %oses) {
739 my $mounts = $oses{$root_dev}->{mounts};
740 # Have to mount / first. Luckily '/' is early in the ASCII
741 # character set, so this should be OK.
742 foreach (sort keys %$mounts) {
743 $g->mount_ro ($mounts->{$_}, $_)
744 if $_ ne "swap" && ($_ eq '/' || $g->is_dir ($_));
747 check_for_applications ($root_dev);
748 check_for_kernels ($root_dev);
749 if ($oses{$root_dev}->{os} eq "linux") {
750 check_for_modprobe_aliases ($root_dev);
751 check_for_initrd ($root_dev);
758 sub check_for_applications
761 my $root_dev = shift;
765 my $os = $oses{$root_dev}->{os};
766 if ($os eq "linux") {
767 my $distro = $oses{$root_dev}->{distro};
768 if (defined $distro && ($distro eq "redhat" || $distro eq "fedora")) {
769 my @lines = $g->command_lines
772 "--qf", "%{name} %{epoch} %{version} %{release} %{arch}\n"]);
774 if (m/^(.*) (.*) (.*) (.*) (.*)$/) {
776 $epoch = "" if $epoch eq "(none)";
788 } elsif ($os eq "windows") {
790 # I worked out a general plan for this, but haven't
791 # implemented it yet. We can iterate over /Program Files
792 # looking for *.EXE files, which we download, then use
793 # i686-pc-mingw32-windres on, to find the VERSIONINFO
794 # section, which has a lot of useful information.
797 $oses{$root_dev}->{apps} = \@apps;
800 sub check_for_kernels
803 my $root_dev = shift;
807 my $os = $oses{$root_dev}->{os};
808 if ($os eq "linux") {
809 # Installed kernels will have a corresponding /lib/modules/<version>
810 # directory, which is the easiest way to find out what kernels
811 # are installed, and what modules are available.
812 foreach ($g->ls ("/lib/modules")) {
813 if ($g->is_dir ("/lib/modules/$_")) {
815 $kernel{version} = $_;
819 foreach ($g->find ("/lib/modules/$_")) {
820 if (m,/([^/]+)\.ko$, || m,([^/]+)\.o$,) {
825 $kernel{modules} = \@modules;
827 push @kernels, \%kernel;
831 } elsif ($os eq "windows") {
835 $oses{$root_dev}->{kernels} = \@kernels;
838 # Check /etc/modprobe.conf to see if there are any specified
839 # drivers associated with network (ethX) or hard drives. Normally
840 # one might find something like:
843 # alias scsi_hostadapter xenblk
845 # XXX This doesn't look beyond /etc/modprobe.conf, eg. in /etc/modprobe.d/
847 sub check_for_modprobe_aliases
850 my $root_dev = shift;
854 $success = $g->aug_init("/", 16);
856 # Register /etc/modules.conf and /etc/conf.modules to the Modprobe lens
858 @results = $g->aug_match("/augeas/load/Modprobe/incl");
860 # Calculate the next index of /augeas/load/Modprobe/incl
862 foreach ( @results ) {
863 next unless m{/augeas/load/Modprobe/incl\[(\d*)]};
864 $i = $1 + 1 if ($1 == $i);
867 $success = $g->aug_set("/augeas/load/Modprobe/incl[$i]",
868 "/etc/modules.conf");
870 $success = $g->aug_set("/augeas/load/Modprobe/incl[$i]",
871 "/etc/conf.modules");
874 $success = $g->aug_load();
876 my %modprobe_aliases;
878 for my $pattern qw(/files/etc/conf.modules/alias
879 /files/etc/modules.conf/alias
880 /files/etc/modprobe.conf/alias
881 /files/etc/modprobe.d/*/alias) {
882 @results = $g->aug_match($pattern);
884 for my $path ( @results ) {
885 $path =~ m{^/files(.*)/alias(?:\[\d*\])?$}
886 or die("$path doesn't match augeas pattern");
890 $alias = $g->aug_get($path);
893 $modulename = $g->aug_get($path.'/modulename');
896 $aliasinfo{modulename} = $modulename;
897 $aliasinfo{augeas} = $path;
898 $aliasinfo{file} = $file;
900 $modprobe_aliases{$alias} = \%aliasinfo;
904 $oses{$root_dev}->{modprobe_aliases} = \%modprobe_aliases;
907 # Get a listing of device drivers in any initrd corresponding to a
908 # kernel. This is an indication of what can possibly be booted.
913 my $root_dev = shift;
917 foreach my $initrd ($g->ls ("/boot")) {
918 if ($initrd =~ m/^initrd-(.*)\.img$/ && $g->is_file ("/boot/$initrd")) {
923 @modules = $g->initrd_list ("/boot/$initrd");
926 @modules = grep { m,([^/]+)\.ko$, || m,([^/]+)\.o$, } @modules;
927 $initrd_modules{$version} = \@modules
929 warn "/boot/$initrd: could not read initrd format"
934 $oses{$root_dev}->{initrd_modules} = \%initrd_modules;
937 #----------------------------------------------------------------------
940 if ($output eq "fish" || $output eq "ro-fish") {
941 my @osdevs = keys %oses;
942 # This only works if there is a single OS.
943 die "--fish output is only possible with a single OS\n" if @osdevs != 1;
945 my $root_dev = $osdevs[0];
947 if ($output eq "ro-fish") {
951 print "-a $_ " foreach @images;
953 my $mounts = $oses{$root_dev}->{mounts};
954 # Have to mount / first. Luckily '/' is early in the ASCII
955 # character set, so this should be OK.
956 foreach (sort keys %$mounts) {
957 print "-m $mounts->{$_}:$_ " if $_ ne "swap";
963 elsif ($output eq "perl") {
964 print Dumper(\%oses);
968 elsif ($output eq "yaml") {
969 die "virt-inspector: no YAML support\n"
970 unless exists $INC{"YAML/Any.pm"};
975 # Plain text output (the default).
976 elsif ($output eq "text") {
981 elsif ($output eq "xml") {
986 elsif ($output eq "query") {
992 output_text_os ($oses{$_}) foreach sort keys %oses;
999 print $os->{os}, " " if exists $os->{os};
1000 print $os->{distro}, " " if exists $os->{distro};
1001 print $os->{version}, " " if exists $os->{version};
1002 print "on ", $os->{root_device}, ":\n";
1004 print " Mountpoints:\n";
1005 my $mounts = $os->{mounts};
1006 foreach (sort keys %$mounts) {
1007 printf " %-30s %s\n", $mounts->{$_}, $_
1010 print " Filesystems:\n";
1011 my $filesystems = $os->{filesystems};
1012 foreach (sort keys %$filesystems) {
1014 print " label: $filesystems->{$_}{label}\n"
1015 if exists $filesystems->{$_}{label};
1016 print " UUID: $filesystems->{$_}{uuid}\n"
1017 if exists $filesystems->{$_}{uuid};
1018 print " type: $filesystems->{$_}{fstype}\n"
1019 if exists $filesystems->{$_}{fstype};
1020 print " content: $filesystems->{$_}{content}\n"
1021 if exists $filesystems->{$_}{content};
1024 if (exists $os->{modprobe_aliases}) {
1025 my %aliases = %{$os->{modprobe_aliases}};
1026 my @keys = sort keys %aliases;
1028 print " Modprobe aliases:\n";
1030 printf " %-30s %s\n", $_, $aliases{$_}->{modulename}
1035 if (exists $os->{initrd_modules}) {
1036 my %modvers = %{$os->{initrd_modules}};
1037 my @keys = sort keys %modvers;
1039 print " Initrd modules:\n";
1041 my @modules = @{$modvers{$_}};
1043 print " $_\n" foreach @modules;
1048 print " Applications:\n";
1049 my @apps = @{$os->{apps}};
1051 print " $_->{name} $_->{version}\n"
1054 print " Kernels:\n";
1055 my @kernels = @{$os->{kernels}};
1056 foreach (@kernels) {
1057 print " $_->{version}\n";
1058 my @modules = @{$_->{modules}};
1059 foreach (@modules) {
1064 if (exists $os->{root}->{registry}) {
1065 print " Windows Registry entries:\n";
1066 # These are just lumps of text - dump them out.
1067 foreach (@{$os->{root}->{registry}}) {
1075 my $xml = new XML::Writer(DATA_MODE => 1, DATA_INDENT => 2);
1077 $xml->startTag("operatingsystems");
1078 output_xml_os ($oses{$_}, $xml) foreach sort keys %oses;
1079 $xml->endTag("operatingsystems");
1086 my ($os, $xml) = @_;
1088 $xml->startTag("operatingsystem");
1090 foreach ( [ "name" => "os" ],
1091 [ "distro" => "distro" ],
1092 [ "version" => "version" ],
1093 [ "root" => "root_device" ] ) {
1094 $xml->dataElement($_->[0], $os->{$_->[1]}) if exists $os->{$_->[1]};
1097 $xml->startTag("mountpoints");
1098 my $mounts = $os->{mounts};
1099 foreach (sort keys %$mounts) {
1100 $xml->dataElement("mountpoint", $_, "dev" => $mounts->{$_});
1102 $xml->endTag("mountpoints");
1104 $xml->startTag("filesystems");
1105 my $filesystems = $os->{filesystems};
1106 foreach (sort keys %$filesystems) {
1107 $xml->startTag("filesystem", "dev" => $_);
1109 foreach my $field ( [ "label" => "label" ],
1110 [ "uuid" => "uuid" ],
1111 [ "type" => "fstype" ],
1112 [ "content" => "content" ],
1113 [ "spec" => "spec" ] ) {
1114 $xml->dataElement($field->[0], $filesystems->{$_}{$field->[1]})
1115 if exists $filesystems->{$_}{$field->[1]};
1118 $xml->endTag("filesystem");
1120 $xml->endTag("filesystems");
1122 if (exists $os->{modprobe_aliases}) {
1123 my %aliases = %{$os->{modprobe_aliases}};
1124 my @keys = sort keys %aliases;
1126 $xml->startTag("modprobealiases");
1128 $xml->startTag("alias", "device" => $_);
1130 foreach my $field ( [ "modulename" => "modulename" ],
1131 [ "augeas" => "augeas" ],
1132 [ "file" => "file" ] ) {
1133 $xml->dataElement($field->[0], $aliases{$_}->{$field->[1]});
1136 $xml->endTag("alias");
1138 $xml->endTag("modprobealiases");
1142 if (exists $os->{initrd_modules}) {
1143 my %modvers = %{$os->{initrd_modules}};
1144 my @keys = sort keys %modvers;
1146 $xml->startTag("initrds");
1148 my @modules = @{$modvers{$_}};
1149 $xml->startTag("initrd", "version" => $_);
1150 $xml->dataElement("module", $_) foreach @modules;
1151 $xml->endTag("initrd");
1153 $xml->endTag("initrds");
1157 $xml->startTag("applications");
1158 my @apps = @{$os->{apps}};
1160 $xml->startTag("application");
1161 $xml->dataElement("name", $_->{name});
1162 $xml->dataElement("version", $_->{version});
1163 $xml->endTag("application");
1165 $xml->endTag("applications");
1167 $xml->startTag("kernels");
1168 my @kernels = @{$os->{kernels}};
1169 foreach (@kernels) {
1170 $xml->startTag("kernel", "version" => $_->{version});
1171 $xml->startTag("modules");
1172 my @modules = @{$_->{modules}};
1173 foreach (@modules) {
1174 $xml->dataElement("module", $_);
1176 $xml->endTag("modules");
1177 $xml->endTag("kernel");
1179 $xml->endTag("kernels");
1181 if (exists $os->{root}->{registry}) {
1182 $xml->startTag("windowsregistryentries");
1183 # These are just lumps of text - dump them out.
1184 foreach (@{$os->{root}->{registry}}) {
1185 $xml->dataElement("windowsregistryentry", $_);
1187 $xml->endTag("windowsregistryentries");
1190 $xml->endTag("operatingsystem");
1195 When you use C<virt-inspector --query>, the output is a series of
1203 (each answer is usually C<yes> or C<no>, or the line is completely
1204 missing if we could not determine the answer at all).
1206 If the guest is multiboot, you can get apparently conflicting answers
1207 (eg. C<windows=yes> and C<linux=yes>, or a guest which is both
1208 fullvirt and has a Xen PV kernel). This is normal, and just means
1209 that the guest can do both things, although it might require operator
1210 intervention such as selecting a boot option when the guest is
1213 This section describes the full range of answers possible.
1221 output_query_windows ();
1222 output_query_linux ();
1223 output_query_rhel ();
1224 output_query_fedora ();
1225 output_query_debian ();
1226 output_query_fullvirt ();
1227 output_query_xen_domU_kernel ();
1228 output_query_xen_pv_drivers ();
1229 output_query_virtio_drivers ();
1232 =item windows=(yes|no)
1234 Answer C<yes> if Microsoft Windows is installed in the guest.
1238 sub output_query_windows
1241 foreach my $os (keys %oses) {
1242 $windows="yes" if $oses{$os}->{os} eq "windows";
1244 print "windows=$windows\n";
1247 =item linux=(yes|no)
1249 Answer C<yes> if a Linux kernel is installed in the guest.
1253 sub output_query_linux
1256 foreach my $os (keys %oses) {
1257 $linux="yes" if $oses{$os}->{os} eq "linux";
1259 print "linux=$linux\n";
1264 Answer C<yes> if the guest contains Red Hat Enterprise Linux.
1268 sub output_query_rhel
1271 foreach my $os (keys %oses) {
1272 $rhel="yes" if $oses{$os}->{os} eq "linux" && $oses{$os}->{distro} eq "redhat";
1274 print "rhel=$rhel\n";
1277 =item fedora=(yes|no)
1279 Answer C<yes> if the guest contains the Fedora Linux distribution.
1283 sub output_query_fedora
1286 foreach my $os (keys %oses) {
1287 $fedora="yes" if $oses{$os}->{os} eq "linux" && $oses{$os}->{distro} eq "fedora";
1289 print "fedora=$fedora\n";
1292 =item debian=(yes|no)
1294 Answer C<yes> if the guest contains the Debian Linux distribution.
1298 sub output_query_debian
1301 foreach my $os (keys %oses) {
1302 $debian="yes" if $oses{$os}->{os} eq "linux" && $oses{$os}->{distro} eq "debian";
1304 print "debian=$debian\n";
1307 =item fullvirt=(yes|no)
1309 Answer C<yes> if there is at least one operating system kernel
1310 installed in the guest which runs fully virtualized. Such a guest
1311 would require a hypervisor which supports full system virtualization.
1315 sub output_query_fullvirt
1317 # The assumption is full-virt, unless all installed kernels
1318 # are identified as paravirt.
1319 # XXX Fails on Windows guests.
1320 foreach my $os (keys %oses) {
1321 foreach my $kernel (@{$oses{$os}->{kernels}}) {
1322 my $is_pv = $kernel->{version} =~ m/xen/;
1324 print "fullvirt=yes\n";
1329 print "fullvirt=no\n";
1332 =item xen_domU_kernel=(yes|no)
1334 Answer C<yes> if there is at least one Linux kernel installed in
1335 the guest which is compiled as a Xen DomU (a Xen paravirtualized
1340 sub output_query_xen_domU_kernel
1342 foreach my $os (keys %oses) {
1343 foreach my $kernel (@{$oses{$os}->{kernels}}) {
1344 my $is_xen = $kernel->{version} =~ m/xen/;
1346 print "xen_domU_kernel=yes\n";
1351 print "xen_domU_kernel=no\n";
1354 =item xen_pv_drivers=(yes|no)
1356 Answer C<yes> if the guest has Xen paravirtualized drivers installed
1357 (usually the kernel itself will be fully virtualized, but the PV
1358 drivers have been installed by the administrator for performance
1363 sub output_query_xen_pv_drivers
1365 foreach my $os (keys %oses) {
1366 foreach my $kernel (@{$oses{$os}->{kernels}}) {
1367 foreach my $module (@{$kernel->{modules}}) {
1368 if ($module =~ m/xen-/) {
1369 print "xen_pv_drivers=yes\n";
1375 print "xen_pv_drivers=no\n";
1378 =item virtio_drivers=(yes|no)
1380 Answer C<yes> if the guest has virtio paravirtualized drivers
1381 installed. Virtio drivers are commonly used to improve the
1386 sub output_query_virtio_drivers
1388 foreach my $os (keys %oses) {
1389 foreach my $kernel (@{$oses{$os}->{kernels}}) {
1390 foreach my $module (@{$kernel->{modules}}) {
1391 if ($module =~ m/virtio_/) {
1392 print "virtio_drivers=yes\n";
1398 print "virtio_drivers=no\n";
1409 L<http://libguestfs.org/>.
1411 For Windows registry parsing we require the C<reged> program
1412 from L<http://home.eunet.no/~pnordahl/ntpasswd/>.
1416 Richard W.M. Jones L<http://et.redhat.com/~rjones/>
1420 Copyright (C) 2009 Red Hat Inc.
1422 This program is free software; you can redistribute it and/or modify
1423 it under the terms of the GNU General Public License as published by
1424 the Free Software Foundation; either version 2 of the License, or
1425 (at your option) any later version.
1427 This program is distributed in the hope that it will be useful,
1428 but WITHOUT ANY WARRANTY; without even the implied warranty of
1429 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1430 GNU General Public License for more details.
1432 You should have received a copy of the GNU General Public License
1433 along with this program; if not, write to the Free Software
1434 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.