1#!/bin/sh
2
3#
4# Copyright (c) 2008 Peter Holm <pho@FreeBSD.org>
5# All rights reserved.
6#
7# Redistribution and use in source and binary forms, with or without
8# modification, are permitted provided that the following conditions
9# are met:
10# 1. Redistributions of source code must retain the above copyright
11#    notice, this list of conditions and the following disclaimer.
12# 2. Redistributions in binary form must reproduce the above copyright
13#    notice, this list of conditions and the following disclaimer in the
14#    documentation and/or other materials provided with the distribution.
15#
16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26# SUCH DAMAGE.
27#
28# $FreeBSD$
29#
30
31# Maintain four snapshot backups of /tmp in /backup/snap?
32
33[ ! -d /backup ] && mkdir /backup
34
35for i in `mount | grep "/backup" | awk '{print $1}'`; do
36   num=`echo $i | sed 's/.*md//'`
37   false
38   while [ $? -ne 0 ]; do
39      umount $i
40   done
41   mdconfig -d -u $num
42done
43for i in `mdconfig -l | sed 's/md//g'`; do
44   [ $i -lt 1 -o $i -gt 4 ] && continue
45   mdconfig -d -u $i
46done
47
48cd /tmp/.snap
49[ -r snap4 ] && rm -f snap4
50[ -r snap3 ] && mv snap3 snap4
51[ -r snap2 ] && mv snap2 snap3
52[ -r snap1 ] && mv snap1 snap2
53
54mksnap_ffs /tmp /tmp/.snap/snap1
55
56for i in `ls /tmp/.snap/snap*`; do
57   name=`basename $i`
58   num=`echo $name | sed 's/snap//'`
59   mdconfig -a -t vnode -o readonly -f /tmp/.snap/snap${num} -u ${num}
60   [ ! -d /backup/snap${num} ] && mkdir /backup/snap${num}
61   mount -o ro /dev/md${num} /backup/snap${num}
62done
63