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# Example showing how to inspect a virtual machine disk.
require 'guestfs'
if ARGV.length == 0
puts "usage: inspect_vm disk.img"
exit 1
end
disk = ARGV[0]
g = Guestfs::Guestfs.new()
# Attach the disk image read-only to libguestfs.
g.add_drive_opts(disk, :readonly => 1)
# Run the libguestfs back-end.
g.launch()
# Ask libguestfs to inspect for operating systems.
roots = g.inspect_os()
if roots.length == 0
puts "inspect_vm: no operating systems found"
exit 1
end
for root in roots do
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.
mps = g.inspect_get_mountpoints(root)
mps = mps.sort {|a,b| a[0].length <=> b[0].length}
for mp in mps do
begin
g.mount_ro(mp[1], mp[0])
rescue Guestfs::Error => msg
printf("%s (ignored)\n", msg)
end
end
# If /etc/issue.net file exists, print up to 3 lines.
filename = "/etc/issue.net"
if g.is_file filename then
printf("--- %s ---\n", filename)
lines = g.head_n(3, filename)
for line in lines do
puts line
end
end
# Unmount everything.
g.umount_all()
end
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