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#!/usr/bin/perl -w
# Example showing how to inspect a virtual machine disk.
use strict;
use Sys::Guestfs;
if (@ARGV < 1) {
die "usage: inspect_vm disk.img"
}
my $disk = $ARGV[0];
my $g = new Sys::Guestfs ();
# Attach the disk image read-only to libguestfs.
# You could also add an optional format => ... argument here. This is
# advisable since automatic format detection is insecure.
$g->add_drive_opts ($disk, readonly => 1);
# Run the libguestfs back-end.
$g->launch ();
# Ask libguestfs to inspect for operating systems.
my @roots = $g->inspect_os ();
if (@roots == 0) {
die "inspect_vm: no operating systems found";
}
for my $root (@roots) {
printf "Root device: %s\n", $root;
# Print basic information about the operating system.
printf " Product name: %s\n", $g->inspect_get_product_name ($root);
printf " Version: %d.%d\n",
$g->inspect_get_major_version ($root),
$g->inspect_get_minor_version ($root);
printf " Type: %s\n", $g->inspect_get_type ($root);
printf " Distro: %s\n", $g->inspect_get_distro ($root);
# Mount up the disks, like guestfish -i.
#
# Sort keys by length, shortest first, so that we end up
# mounting the filesystems in the correct order.
my %mps = $g->inspect_get_mountpoints ($root);
my @mps = sort { length $a <=> length $b } (keys %mps);
for my $mp (@mps) {
eval { $g->mount_ro ($mps{$mp}, $mp) };
if ($@) {
print "$@ (ignored)\n"
}
}
# If /etc/issue.net file exists, print up to 3 lines.
my $filename = "/etc/issue.net";
if ($g->is_file ($filename)) {
printf "--- %s ---\n", $filename;
my @lines = $g->head_n (3, $filename);
print "$_\n" foreach @lines;
}
# Unmount everything.
$g->umount_all ()
}
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