3 # Copyright (C) 2007 Google 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, but
11 # WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # 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., 51 Franklin Street, Fifth Floor, Boston, MA
24 TMPDIR=`mktemp -d` || exit 1
25 trap "umount $TMPDIR; rmdir $TMPDIR" EXIT
27 # If it's not a block device try to mount it via loopback device.
28 # This is needed for file disks.
30 if [ ! -b $blockdev ]; then
31 MOUNT_OPTIONS="$MOUNT_OPTIONS -o loop"
33 mount $MOUNT_OPTIONS $blockdev $TMPDIR
35 HNAME="$TMPDIR/etc/hostname"
36 MNAME="$TMPDIR/etc/mailname"
38 # for hostname, we raise and error if the old hostname is not what we
40 OLD_HNAME="`cat $HNAME`"
41 if [ "$OLD_HNAME" = "$old_name" ]; then
42 echo $instance > $HNAME
44 log_error "Cannot rename from $old_name to $instance:"
45 log_error "Instance has a different hostname ($OLD_HNAME)"
49 # for mailname, we rename only if it has the old name, otherwise we
50 # ignore it (and assumme that it's a customized name)
51 if [ "`cat $MNAME`" = "$old_name" ]; then
52 echo $instance > $MNAME