#!/bin/sh

#
# Copyright (c) 2002, 2003, 2004, 2005 Peter Palfrader <peter@palfrader.org>
#
# All rights reserved.
#

umask 037

set -e
set -u

DATE=`date "+%Y%m%d-%H%M%S"`
if [ -d /var/backups/local/mysql ]; then
	TARGET=/var/backups/local/mysql
elif [ -d /var/local/backup/mysql ]; then
	TARGET=/var/local/backup/mysql
else
	echo "Cannot find a backup target directory" >&2
	exit 1
fi

echo 'SHOW DATABASES;' | mysql | tail -n +2 |
while read db; do
	if [ "$db" = "innodb" -o "$db" = "test" ] ; then
		continue;
	fi

	file="$TARGET/$DATE-$db"
	mysqldump --opt --lock-tables -- "$db" > "$file"
	bzip2 -- "$file"

	md5=`md5sum -- "$file.bz2" | awk '{print $1}'`
	if [ -e "$TARGET/MD5-$md5" ]; then
		rm -- "$file.bz2"
		ln "$TARGET/MD5-$md5" "$file.bz2"
	else
		ln "$file.bz2" "$TARGET/MD5-$md5"
	fi
done | egrep -v 'Database ".*" dropped'