#!/bin/sh
# Script to control mdadm raid array monitoring
# Written by John Jenkins mrgoblin@sastk.org
# $Id: rc.mdadm 185 2011-05-04 00:14:12Z mrgoblin $
#
# Please Note: /etc/rc.d/rc.local is likely the best place to call 
# this script from. If you do call this at start-up please remember
# to also add it to your shutdown scripts or you will be left with
# a stale PID file. Using the "fstop" parameter will remove this.
#

# Set some variables
MDPID=""
PIDFILE="/var/run/mdadm"
CONFIG="/etc/mdadm.conf"
PROG="/sbin/mdadm"

# you may list each device seperated by spaces
DEVICES="/dev/md[0-9]"

# Sanity Checks
if [ ! -f ${CONFIG} -o ! -x ${PROG} ]; then
	echo 'Either your mdadm binary or config file is missing! '
	echo 'Is Mdadm installed? '
	echo
	exit 1
fi


# Get current PID
if [ -f /var/run/mdadm ];then
	MDPID=$(cat /var/run/mdadm)
fi

# The functions
start() {
	if [ "X${MDPID}" = "X" ];then
                ${PROG} --monitor --daemonise ${DEVICES} > ${PIDFILE}
	else
		echo "Mdadm Monitor already running : "
                if [ "${MDPID}" != "$(pidof mdadm)" ]; then
                        echo "Removing stale PID file : "
                                if [ -f "${PIDFILE}" ]; then
                                        rm -f "${PIDFILE}"
                                fi
                        ${PROG} --monitor --daemonise ${DEVICES} > ${PIDFILE}
                fi
        	exit 1
	fi
}

stop() {
	if [ "X${MDPID}" = "X" ];then
		echo "Mdadm Monitor not running :"
		exit 1
	else
		echo -n "Stopping Mdadm monitor :"
		kill -15 ${MDPID} && rm ${PIDFILE} && echo " Success " || echo " Failed to stop Mdadm Monitor "
	        unset MDPID
	fi
}

status() {
	if [ "X${MDPID}" = "X" ];then
		echo "Mdadm Monitor not running :"
		${PROG} -D ${DEVICES} |awk '/(^\/dev|State\ :|Raid\ Level|Array Size|Failed)/ { print $0 }'
		echo
	else
		echo "Mdadm Monitor running on PID ${MDPID} :"
		${PROG} -D ${DEVICES} |awk '/(^\/dev|State\ :|Raid\ Level|Array Size|Failed)/ { print $0 }'
		echo
      	fi
}

forced_stop() {
	echo "Forcibly stopping Mmdadm Monitor :"
	/bin/killall -9 mdadm
	if [ -f "${PIDFILE}" ]; then
	        rm -f "${PIDFILE}"
	fi
	unset MDPID
}


# Parse input
case "$1" in
  start)
	start
	;;
  stop) 
	stop
	;;
  restart)
	stop
	start
	;;
  fstop)
        forced_stop
	;;
  status)
    status
	;;
  *)
	echo "*** Usage: $0 {start|stop|fstop|restart|status}"
	exit 1
esac

exit 0

# $Id: rc.mdadm 185 2011-05-04 00:14:12Z mrgoblin $
# EOF