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