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#!/usr/bin/perl -w
# virt-list-filesystems
# 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.
use warnings;
use strict;
use Sys::Guestfs;
use Sys::Guestfs::Lib qw(open_guest get_partitions);
use Pod::Usage;
use Getopt::Long;
use Locale::TextDomain 'libguestfs';
=encoding utf8
=head1 NAME
virt-list-filesystems - List filesystems in a virtual machine or disk image
=head1 SYNOPSIS
virt-list-filesystems [--options] domname
virt-list-filesystems [--options] disk.img [disk.img ...]
=head1 DESCRIPTION
C<virt-list-filesystems> is a command line tool to list
the filesystems that are contained in a virtual machine or
disk image.
C<virt-list-filesystems> is just a simple wrapper around
L<libguestfs(3)> functionality. For more complex cases you should
look at the L<guestfish(1)> tool.
=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 $long;
=item B<-l> | B<--long>
With this option, C<virt-list-filesystems> displays the type of
each filesystem too (where "type" means C<ext3>, C<xfs> etc.)
=cut
my $all;
=item B<-a> | B<--all>
Normally we only show mountable filesystems. If this option
is given then swap devices are shown too.
=back
=cut
# Configure bundling, otherwise '-al' is treated as '--all'.
Getopt::Long::Configure ("bundling");
GetOptions ("help|?" => \$help,
"version" => \$version,
"connect|c=s" => \$uri,
"long|l" => \$long,
"all|a" => \$all,
) 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-list-filesystems: no image or VM name given")
if @ARGV <= 0;
my $g;
if ($uri) {
$g = open_guest (\@ARGV, address => $uri);
} else {
$g = open_guest (\@ARGV);
}
$g->launch ();
# List of partitions, LVs etc.
my @partitions = get_partitions ($g);
my @fses;
my @not_mountable;
my $dev;
# Try and mount each one, to see what's mountable.
foreach $dev (@partitions) {
eval { $g->mount_ro ($dev, "/"); };
my $mountable = $@ ? 0 : 1;
$g->umount_all ();
if ($mountable) {
push @fses, $dev;
} else {
push @not_mountable, $dev;
}
}
foreach $dev (@fses) {
print canonicalize($dev);
if ($long) {
my $fstype;
eval { $fstype = $g->vfs_type ($dev); };
if ($fstype) {
print " $fstype";
} else {
print " unknown";
}
}
print "\n";
}
# If asked, look in the not_mountable list for potential swap devices.
if ($all) {
foreach $dev (@not_mountable) {
my $file;
eval { $file = $g->file ($dev); };
if ($file && $file =~ /\bswap\b/) {
print canonicalize($dev);
print " swap" if $long;
print "\n"
}
}
}
# The reverse of device name translation, see
# BLOCK DEVICE NAMING in guestfs(3).
sub canonicalize
{
local $_ = shift;
if (m{^/dev/[hv]d([a-z]\d)$}) {
return "/dev/sd$1";
}
$_;
}
=head1 SEE ALSO
L<guestfs(3)>,
L<guestfish(1)>,
L<virt-cat(1)>,
L<virt-tar(1)>,
L<virt-list-partitions(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://et.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.
|
