#!/bin/sh


## Backup prefix
PREFIX="bu_"

## Dirs which should be backed
TOBACKUP="/home/ /var/www/"

## MySQL login data
MYSQLUSER="test"
MYSQLPASS="test"
MYSQLHOST="localhost"

## Dir to save backup
OUTDIR="/"

## FTP login form the backup FTP server (optional)
FTPHOST="test"
FTPUSER="test"
FTPPASS="test"

## Backup password (optional)
## BACKUPPASS="Zip File mit PW schützen!"

## Working dir
WORKINGDIR="/tmp/"

## Logfile
LOGFILE="/var/log/${PREFIX}backup.log"

##
## </Configuration>
##

if [ -n "$OUTDIR" ]; then

	## Set prozess priority
	renice -19 -p $$ 1> /dev/null 2>> $LOGFILE

	## Set I/O priority
	ionice -c2 -n1 -p $$ 1> /dev/null 2>> $LOGFILE

	## Date and time
	DATE=$(date +%Y-%m-%d-%H%M%S)

	## Create and enter working dir
	mkdir ${WORKINGDIR}${PREFIX}${DATE}
	cd ${WORKINGDIR}${PREFIX}${DATE}

	## Create a list with installed deb pakets
	dpkg --get-selections > "deb.list"
	TOBACKUP="${TOBACKUP} deb.list"

	## Create MySQL dump environment
	mkdir mysqldumps/
	TOBACKUP="${TOBACKUP} mysqldumps/"

	## Create MySQL dumps from all databases
	DBS="$(mysql  -h $MYSQLHOST -u $MYSQLUSER -p$MYSQLPASS -Bse 'show databases' 2>> $LOGFILE)"
	if [ $? -ne 0 ]; then

		## Delete temporary files
		rm -r ${WORKINGDIR}${PREFIX}${DATE}
		exit 1
	fi
	for DB in $DBS; do
		mysqldump -h $MYSQLHOST -u $MYSQLUSER -p$MYSQLPASS $DB > "mysqldumps/${DB}.sql"
	done

	## Compress and / or decrypt files
	if [ -n "$BACKUPPASS" ]; then

		VAR_EXTENSION=".tar.bz2.gpg"
		tar -cf - $TOBACKUP 2> /dev/null | gpg -c --symmetric --bzip2-compress-level 9 --passphrase ${BACKUPPASS}  > "${PREFIX}${DATE}${VAR_EXTENSION}"
	else

		VAR_EXTENSION=".tar.bz2"
		tar -cf - $TOBACKUP 2> /dev/null | bzip2 -c --best > "${PREFIX}${DATE}${VAR_EXTENSION}"
	fi

	if [ -n "$FTPHOST" ] && [ -n "$FTPUSER" ] && [ -n "$FTPPASS" ]; then

		## Save backup on FTP server
		ncftpput -u $FTPUSER -p $FTPPASS $FTPHOST $OUTDIR "${PREFIX}${DATE}${VAR_EXTENSION}" 2>> $LOGFILE

	else

		## Save backup lokal
		cp "${PREFIX}${DATE}${VAR_EXTENSION}" "$OUTDIR" 2>> $LOGFILE
	fi

	## Delete temporary files
	rm -r ${WORKINGDIR}${PREFIX}${DATE}

	if [ $? -ne 0 ]; then
		exit 1
	else
		exit 0
	fi
else
	echo "Error: Output dir is empty" >> $LOGFILE
	exit 1
fi