#!/bin/bash
# $0 -- Convert all local MySQL DB to the MySQL 4.1 format
# Copyright (C) 2005 Davide Madrisan <davide.madrisan@qilinux.it>

# see: http://dev.mysql.com/doc/mysql/en/upgrading-from-4-0.html

[ $UID = 0 ] ||
 { echo "error: ${0##*/}: must be superuser" >&2; exit 1; }

# dump all local MySQL DB to a temporary file
tempf=`mktemp -t allMySQLdb.XXXXXX` ||
 { echo "cannot create secure temporary files." >&2; exit 1; }
trap 'rm -f $tempf' 0 1 2 3 6 7 13 15

[ -f /var/lock/subsys/mysql ] &&
   let "mysql_is_running = 1" || let "mysql_is_running = 0"

[ "$mysql_is_running" = "1" ] || 
 { service mysql start; sleep 3; }

echo "dumping all MySQL DB to $tempf..."
mysqldump --all-databases --result-file=$tempf >/dev/null

service mysql stop
sleep 3

# create a backup copy of all mysql DB
echo "creating a backup copy of all the DB in $bckdir..."
bckdir=`mktemp -d /var/lib/mysql.XXXXXX` ||
 { echo "cannot create a backup copy of local MySQL db." >&2; exit 1; }

mv /var/lib/mysql/ $bckdir

echo "creating a new MySQL DB and change permissions..."
install -d -m755 -o mysql -g mysql /var/lib/mysql/
mysql_install_db -b /usr --ldata=/var/lib/mysql
/bin/chown -R mysql.mysql /var/lib/mysql/*

service mysql start

sleep 3

echo "restoring the dumped MySQL DB $tempf..."
mysql < $tempf
#mysql_fix_privilege_tables

rm -f $tempf

[ "$mysql_is_running" = "1" ] || service mysql stop