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
22 TEMP=`getopt -o o:n:b:s: -n '$0' -- "$@"`
24 if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
26 # Note the quotes around `$TEMP': they are essential!
31 -o) old_name=$2; shift 2;;
33 -n) new_name=$2; shift 2;;
35 -b) blockdev=$2; shift 2;;
37 -s) swapdev=$2; shift 2;;
41 *) echo "Internal error!"; exit 1;;
44 if [ -z "$old_name" -o -z "$new_name" -o -z "$blockdev" -o -z "$swapdev" ]; then
45 echo "Missing -o or -n or -b or -s argument!"
49 TMPDIR=`mktemp -d` || exit 1
50 trap "umount $TMPDIR; rmdir $TMPDIR" EXIT
52 # If it's not a block device try to mount it via loopback device.
53 # This is needed for file disks.
55 if [ ! -b $blockdev ]; then
56 MOUNT_OPTIONS="$MOUNT_OPTIONS -o loop"
58 mount $MOUNT_OPTIONS $blockdev $TMPDIR
60 HNAME="$TMPDIR/etc/hostname"
61 MNAME="$TMPDIR/etc/mailname"
63 # for hostname, we raise and error if the old hostname is not what we
65 OLD_HNAME="`cat $HNAME`"
66 if [ "$OLD_HNAME" = "$old_name" ]; then
67 echo $new_name > $HNAME
69 echo "Cannot rename from $old_name to $new_name:" 1>&2
70 echo "Instance has a different hostname ($OLD_HNAME)" 1>&2
74 # for mailname, we rename only if it has the old_name, otherwise we
75 # ignore it (and assumme that it's a customized name)
76 if [ "`cat $MNAME`" = "$old_name" ]; then
77 echo $new_name > $MNAME