#
# mysql handler script for backupninja
#

getconf backupdir /var/backups/mysql
getconf databases all
getconf compress yes
getconf dbusername
getconf dbpassword
getconf dbhost localhost
getconf hotcopy no
getconf sqldump no
getconf user root

# create backup dirs

[ -d $backupdir ] || mkdir -p $backupdir
[ -d $backupdir ] || fatal "Backup directory '$backupdir'"
hotdir="$backupdir/hotcopy"
dumpdir="$backupdir/sqldump"
[ "$sqldump" == "no" -o -d $dumpdir ] || mkdir -p $dumpdir
[ "$hotcopy" == "no" -o -d $hotdir ] || mkdir -p $hotdir

# create .my.cnf
 # (we do this because we don't want to have to specify the password on the command line
 # because then anyone would be able to see it with a 'ps aux'. instead, we create a 
 # temporary ~/.my.cnf in root's home directory).

if [ "$dbusername" != "" ]; then
	home=`grep '^root' /etc/passwd | awk -F: '{print $6}'`
	[ -d $home ] || fatal "Can't find root's home directory ($home)."
	mycnf="$home/.my.cnf"
	if [ -f $mycnf ]; then
		# rename temporarily
		tmpcnf="$home/my.cnf.disable"
		debug 0 "mv $mycnf $tmpcnf"
		mv $mycnf $tmpcnf
	fi
	oldmask=`umask`
	umask 077
	cat > $mycnf <<EOF
# auto generated backupninja mysql conf
[mysql]
user=$dbusername
password=$dbpassword

[mysqldump]
user=$dbusername
password=$dbpassword

[mysqlhotcopy]
user=$dbusername
password=$dbpassword
EOF
	umask $oldmask
fi
	
## HOT COPY

if [ "$hotcopy" == "yes" ]; then 
	if [ "$databases" == "all" ]; then
		execstr="$MYSQLHOTCOPY --quiet --allowold --regexp /.\*/./.\*/ $hotdir"
		debug 0 "su $user -c '$execstr'"
		if [ ! $test ]; then
			output=`su $user -c "$execstr" 2>&1`
			code=$?
			if [ "$code" == "0" ]; then
				debug 0 $output
				debug 1 "Successfully finished hotcopy of all mysql databases"
			else
				debug 2 $output
				debug 2 "Failed to hotcopy all mysql databases"
			fi
		fi
	else	
		for db in $databases; do
			execstr="$MYSQLHOTCOPY --allowold $db $hotdir"
			debug 0 "su $user -c '$execstr'"
			if [ ! $test ]; then
				output=`su $user -c "$execstr" 2>&1`
				code=$?
				if [ "$code" == "0" ]; then
					debug 0 $output
					debug 1 "Successfully finished hotcopy of mysql database $db"
				else
					debug 2 $output
					debug 2 "Failed to hotcopy mysql database $db"
				fi
			fi
		done
	fi
fi
	
## SQL DUMP

if [ "$sqldump" == "yes" ]; then
	if [ "$databases" == "all" ]; then
		databases=`echo 'show databases' | su $user -c "$MYSQL" | grep -v Database`
	fi

	for db in $databases; do
		execstr="$MYSQLDUMP --lock-tables --complete-insert --add-drop-table --quick --quote-names $db > $dumpdir/${db}.sql"
		debug 0 "su $user -c '$execstr'"
		if [ ! $test ]; then
			output=`su $user -c "$execstr" 2>&1`
			code=$?
			if [ "$code" == "0" ]; then
				debug 0 $output
				debug 1 "Successfully finished dump of mysql database $db"
			else
				debug 2 $output
				debug 2 "Failed to dump mysql databases $db"
			fi
		fi
	done
	
	if [ "$compress" == "yes" ]; then
		output=`$GZIP -f $dumpdir/*.sql 2>&1`
		debug 0 $output
	fi
fi

if [ "$dbusername" != "" ]; then
	## clean up tmp config file
	debug 0 "rm $mycnf"
	rm $mycnf
	if [ -f "$tmpcnf" ]; then
		debug 0 "mv $tmpcnf $mycnf"
		mv $tmpcnf $mycnf
	fi
fi

return 0