#!/bin/bash
#
# ndbd		This shell script takes care of starting and stopping
#		the MySQL Cluster data node daemon (ndbd).
#
# chkconfig: - 63 37
# description:	MySQL Cluster data node daemon.
# processname: ndbd
# config: /etc/my.cnf
# pidfile: /var/lib/mysql-cluster/ndb_${node_id}.pid

# Source function library.
. /etc/rc.d/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network


prog="ndbd"

# extract value of a MySQL option from config files
# Usage: get_mysql_option SECTION VARNAME DEFAULT
# result is returned in $result
# We use my_print_defaults which prints all options from multiple files,
# with the more specific ones later; hence take the last match.
get_mysql_option(){
	result=`/usr/bin/my_print_defaults "$1" | sed -n "s/^--$2=//p" | tail -n 1`
	if [ -z "$result" ]; then
	    # not found, use default
	    result="$3"
	fi
}

get_mysql_option ndbd connect-string "nodeid=2;host=localhost:1186"
ndbd_connect_string="$result"
node_id=`echo "$result" | sed 's/^nodeid=\([0-9]*\);.*$/\1/'`
connect_string=`echo "$result" | sed 's/^.*host=//'`
pidfile="/var/lib/mysql-cluster/ndb_${node_id}.pid"

# For SELinux we need to use 'runuser' not 'su'
if [ -x /sbin/runuser ]
then
    SU=runuser
else
    SU=su
fi

start(){
	# all options are expected to be specified in /etc/my.cnf
	$SU -l mysql -c "/usr/libexec/ndbd" >/dev/null 2>&1
	ret=$?
	if [ $ret -eq 0 ]; then
	    action $"Starting $prog: " /bin/true
	else
    	    action $"Starting $prog: " /bin/false
	fi
	[ $ret -eq 0 ] && touch /var/lock/subsys/ndbd
	return $ret
}

stop(){
        NDBD_PID=`cat "$pidfile"  2>/dev/null `
        if [ -n "$NDBD_PID" ]; then
	    /usr/bin/ndb_mgm -e "$node_id STOP" "$connect_string" >/dev/null
            ret=$?
            if [ $ret -eq 0 ]; then
		rm -f /var/lock/subsys/ndbd
		rm -f "$pidfile"
		action $"Stopping $prog: " /bin/true
            else
                action $"Stopping $prog: " /bin/false
            fi
        else
            ret=1
            action $"Stopping $prog: " /bin/false
        fi
        return $ret
}
 
restart(){
    stop
    start
}

condrestart(){
    [ -e /var/lock/subsys/ndbd ] && restart || :
}

# See how we were called.
case "$1" in
  start)
    start
    ;;
  stop)
    stop
    ;;
  status)
    status ndbd
    ;;
  restart)
    restart
    ;;
  condrestart)
    condrestart
    ;;
  *)
    echo $"Usage: $0 {start|stop|status|condrestart|restart}"
    exit 1
esac

exit $?