scripts/sysbackup-tar.sh

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2010-03-28 10:41:34 +00:00
#!/bin/bash
#
# (C) Stefan Brand <seiichiro@seiichiro0185.org> 2008
#
# sysbackup-tar.sh: little script to backup your running system into a tar-file
## Configuration
# SYSMOUNTS - this array should include all system partitions. If your system for example has
# /, /boot, /usr and /opt on different partitions it should look like this:
# SYSMOUNTS=( "/" "/boot" "/usr" "/opt" )
# Please note: partitions need to be given in correct order, meaning / has always to be the first
# If you for example have /usr and /usr/local on seperate partitions you will have to give / first,
# then /usr and last /usr/local
SYSMOUNTS=( "/" "/boot" )
# DOMOUNT - this array should include all partitions that are not mountet by default, like /boot
# Syntax is the same as for SYSMOUNTS
DOMOUNTS=( "/boot" )
# EXCLUDES - this array contains patterns for files/directories that should not be included in
# the backup. An example for this is tmp/*
EXCLUDES=( "tmp/*" "var/cache/pacman/*" )
## End Configuration
## Program -- NO CHANGES ARE NEEDED AFTER THIS LINE --
_BASEDIR="$1"
_OPTNAME="${2:-backup}"
## Checks
if [ $UID -ne 0 ]
then
echo "You have to be root to run this!"
echo "exiting..."
exit 1
fi
if [[ "${_BASEDIR}" == "" || "${_BASEDIR}" == "--help" || "${_BASEDIR}" == "-h" || "${_BASEDIR}" == "-?" ]]
then
echo "USAGE: $0 <backup dir> [<backup name>]"
echo "exiting"
exit 2
fi
if [ ! -d "${_BASEDIR}" ]
then
echo "ERROR: No valid Backup directory given!"
echo "USAGE: $0 <backup dir> [<backup name>]"
echo "exiting"
exit 3
fi
## Functions
function prepare()
{
mkdir /tmp/backup$$
for index in $(seq 0 $(( ${#DOMOUNTS[@]} - 1 )))
do
mount "${DOMOUNTS[$index]}"
done
for index in $(seq 0 $(( ${#SYSMOUNTS[@]} - 1 )))
do
mount -o ro,bind "${SYSMOUNTS[$index]}" "/tmp/backup$$${SYSMOUNTS[$index]}"
done
for index in $(seq 0 $(( ${#EXCLUDES[@]} - 1 )))
do
echo "${EXCLUDES[$index]}" >> /tmp/excludes$$
done
BACKUPFILE=$(echo "${_BASEDIR}/${_OPTNAME}-system-$(date +%Y%m%d).tar.gz" | sed -e "s#//#/#g")
}
function dobackup()
{
cd /tmp/backup$$/
tar -cvzpf "${BACKUPFILE}" -X /tmp/excludes$$ *
}
function cleanup()
{
cd /
for index in $(seq $(( ${#SYSMOUNTS[@]} - 1 )) -1 0)
do
UMOUNT=$(echo "/tmp/backup$$${SYSMOUNTS[$index]}" | sed -e 's#/$##')
umount "$UMOUNT"
done
for index in $(seq $(( ${#DOMOUNTS[@]} - 1 )) -1 0)
do
umount "${DOMOUNTS[$index]}"
done
rmdir /tmp/backup$$
rm -f /tmp/excludes$$
}
## Main Program
trap cleanup TERM INT
prepare
dobackup
sleep 3
cleanup
exit 0