#!/sbin/runscript

set -e

NAME=kerrighed
DESC="Kerrighed"

KRG_MODULE=$NAME

CFG=/etc/conf.d/$NAME
SCRIPTNAME=/etc/init.d/$NAME

# Read config file if it is present.
if [ -r $CFG ]; then
    . $CFG
fi

depend() {
	need netmount
}

start() {
    ebegin "Starting $NAME"
    /sbin/modprobe -q $KRG_MODULE $ARGS

    case "x$LEGACY_SCHED" in
	xtrue)
	    d_trigger_krg_legacy_scheduler_start &
	    ;;
	xfalse)
	    ;;
	*)
	    eend 1 "Value of LEGACY_SCHED in $CFG must be 'true' or 'false';"
	    return 1
	    ;;
    esac
    eend 0
}

#
# Function that puts a trigger in place so that the krg_legacy_scheduler
# gets automatically started when the cluster is started.
#
d_trigger_krg_legacy_scheduler_start () {
    # Wait for the cluster to be started.
    krgadm cluster wait_start >/dev/null 2>&1

    # Only run the scheduler on a single node. Arbitrarily, the first
    # node (beware, the sort can't be numerical even if -n is passed,
    # because of the non-numerical prefix, so it's ASCII).
    self=$(readlink -f /proc/nodes/self)
    first_ascii=$(ls -1d /proc/nodes/node*|sort|head -1)

    if [ $self = $first_ascii ]; then
	krg_legacy_scheduler
    fi
}


stop() {
    eend 0
}

#
# Function that prints if kerrighed is started or not
#
status() {
    if test ! -e /proc/nodes/nrnodes; then
	eerror "not loaded"
	return 1
    else
	present=`cat /proc/nodes/nrnodes | grep 'PRESENT' | cut -d':' -f2`
	possible=`cat /proc/nodes/nrnodes | grep 'POSSIBLE' | cut -d':' -f2`
	if test $possible = 0; then
	    ebegin "not started ($present nodes available)"
	else
	    ebegin "started on $possible nodes ($present nodes available)"
	fi
    fi
    eend 0
}