X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=edit%2Fvirt-edit;fp=edit%2Fvirt-edit;h=46e86a179202c5565008bb5da2196f2d5b53c911;hb=b488436cc54288fcae8988493749f2e6c87f274c;hp=0000000000000000000000000000000000000000;hpb=75b6338da3e6e33c02b931623f074ab5a76a1788;p=libguestfs.git

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+#!/usr/bin/perl -w
+# virt-edit
+# 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 resolve_windows_path
+  inspect_all_partitions inspect_partition
+  inspect_operating_systems mount_operating_system);
+use Pod::Usage;
+use Getopt::Long;
+use File::Temp qw/tempfile/;
+use Locale::TextDomain 'libguestfs';
+
+=encoding utf8
+
+=head1 NAME
+
+virt-edit - Edit a file in a virtual machine
+
+=head1 SYNOPSIS
+
+ virt-edit [--options] domname file
+
+ virt-edit [--options] disk.img [disk.img ...] file
+
+=head1 DESCRIPTION
+
+C<virt-edit> is a command line tool to edit C<file> where C<file>
+exists in the named virtual machine (or disk image).
+
+B<Note> you must I<not> use virt-edit on live virtual machines.  If
+you do this, you risk disk corruption in the VM.
+
+If you want to just view a file, use L<virt-cat(1)>.  For more complex
+cases you should look at the L<guestfish(1)> tool.
+
+=head1 EXAMPLES
+
+ virt-edit mydomain /boot/grub/grub.conf
+
+ virt-edit mydomain /etc/passwd
+
+=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.
+
+=back
+
+=cut
+
+GetOptions ("help|?" => \$help,
+            "version" => \$version,
+            "connect|c=s" => \$uri,
+    ) 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-edit: no image, VM names or filenames to edit given")
+    if @ARGV <= 1;
+
+my $filename = pop @ARGV;
+
+my $g;
+if ($uri) {
+    $g = open_guest (\@ARGV, address => $uri, rw => 1);
+} else {
+    $g = open_guest (\@ARGV, rw => 1);
+}
+
+$g->launch ();
+
+# List of possible filesystems.
+my @partitions = get_partitions ($g);
+
+# Now query each one to build up a picture of what's in it.
+my %fses =
+    inspect_all_partitions ($g, \@partitions,
+      use_windows_registry => 0);
+
+my $oses = inspect_operating_systems ($g, \%fses);
+
+my @roots = keys %$oses;
+die __"no root device found in this operating system image" if @roots == 0;
+die __"multiboot operating systems are not supported by virt-edit" if @roots > 1;
+my $root_dev = $roots[0];
+
+my $os = $oses->{$root_dev};
+mount_operating_system ($g, $os, 0);
+
+my ($fh, $tempname) = tempfile ();
+
+# Allow this to fail in case eg. the file does not exist.
+$g->download($filename, $tempname);
+
+my $oldctime = (stat ($tempname))[10];
+
+my $editor = $ENV{EDITOR};
+$editor ||= "vi";
+system ("$editor $tempname") == 0
+    or die "edit failed: $editor: $?";
+
+my $newctime = (stat ($tempname))[10];
+
+if ($oldctime != $newctime) {
+    $g->upload ($tempname, $filename)
+} else {
+    print __"File not changed.\n";
+}
+
+$g->sync ();
+$g->umount_all ();
+
+undef $g;
+
+exit 0;
+
+=head1 ENVIRONMENT VARIABLES
+
+=over 4
+
+=item C<EDITOR>
+
+If set, this string is used as the editor.  It may contain arguments,
+eg. C<"emacs -nw">
+
+If not set, C<vi> is used.
+
+=back
+
+=head1 SEE ALSO
+
+L<guestfs(3)>,
+L<guestfish(1)>,
+L<virt-cat(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.