#!/bin/bash
#
# Init file for the NorduGrid/ARC Information Endpoint Registration
#
# chkconfig: - 55 45
# description: NorduGrid/ARC Information Endpoint Registration
#
# config: /etc/sysconfig/nordugrid
# config: /etc/sysconfig/nordugrid-arc-infosys
# config: /etc/arc.conf
#
######################################################################

### BEGIN INIT INFO
# Provides:          nordugrid-arc-inforeg
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Stop:      0 1 2 3 4 5 6
# Short-Description: NorduGrid/ARC Information Endpoint Registration
# Description:       Init file for the NorduGrid/ARC Information Endpoint
#                    Registration
### END INIT INFO

# Helper functions
if [ -f /etc/init.d/functions ]; then
    . /etc/init.d/functions
    log_success_msg() {
	echo -n "$@"
	success "$@"
	echo
    }
    log_warning_msg() {
	echo -n "$@"
	warning "$@"
	echo
    }
    log_failure_msg() {
	echo -n "$@"
	failure "$@"
	echo
    }
elif [ -f /lib/lsb/init-functions ]; then
    . /lib/lsb/init-functions
else
    echo "Error: Cannot source neither init.d nor lsb functions"
    exit 1
fi

prog=nordugrid-arc-inforeg
RETVAL=0
RUN=yes

# sysconfig files
if [ -r /etc/sysconfig/nordugrid ]; then
    . /etc/sysconfig/nordugrid
elif [ -r /etc/default/nordugrid ]; then
    . /etc/default/nordugrid
fi
if [ -r /etc/sysconfig/$prog ]; then
    . /etc/sysconfig/$prog
elif [ -r /etc/default/$prog ]; then
    . /etc/default/$prog
fi

[ -n "$ARC_LOCATION ] && export ARC_LOCATION
[ -n "$ARC_CONFIG ]   && export ARC_CONFIG

if [ "x$RUN" != "xyes" ]; then
    echo "$prog disabled, please adjust the configuration to your needs "
    echo "and then set RUN to 'yes' in /etc/default/$prog to enable it."
    exit 0
fi

ARC_LOCATION=${ARC_LOCATION:-/usr}
if [ ! -d "$ARC_LOCATION" ]; then
    echo "ARC_LOCATION ($ARC_LOCATION) not found"
    exit 1
fi

# Source the config parsing routines
if [ -r "$ARC_LOCATION/share/arc/config_parser_compat.sh" ]; then
    . $ARC_LOCATION/share/arc/config_parser_compat.sh || exit $?
else
    echo "Could not find $ARC_LOCATION/share/arc/config_parser_compat.sh"
    exit 1
fi

ARC_CONFIG=${ARC_CONFIG:-/etc/arc.conf}
if [ ! -r "$ARC_CONFIG" ]; then
    echo "ARC configuration file ($ARC_CONFIG) not found"
    echo "If this file is in a non-standard place it can be set with the"
    echo "  ARC_CONFIG environment variable"
    exit 1
fi

# Read arc.conf
config_parse_file $ARC_CONFIG || exit $?

# Check for infosys-block
if ! config_match_section infosys; then
    echo "Missing infosys configuration block"
    exit 0
fi

config_hide_all
config_import_section common
config_import_section infosys

# Use this command to change user
if [ -x /sbin/runuser ]; then
    RUNUSER=runuser
else
    RUNUSER=su
fi

# If missing, we have a problem
USERSHELL=${USERSHELL:-"/bin/sh"}
if [ ! -x ${USERSHELL} ]; then
    log_failure_msg "Could not find /bin/sh"
    exit 1
fi

# Debian does not have /var/lock/subsys
if [ -d /var/lock/subsys ]; then
    lockfile=/var/lock/subsys/$prog
else
    lockfile=/var/lock/$prog
fi

registrationlog=${CONFIG_registrationlog:-/var/log/arc/inforegistration.log}
arc_runtime_config="/var/run/arc/infosys"
registrationconf=$arc_runtime_config/grid-info-resource-register.conf

start () {
    rm -f $registrationconf
    $ARC_LOCATION/share/arc/create-inforeg-config
    if grep -q ^regtype: $registrationconf ; then
	# We should sleep forever really...
	sleep 10000d >/dev/null 2>&1 &
	pid=$!
	echo $pid > /var/run/nordugrid-arc-inforeg.pid
	$ARC_LOCATION/share/arc/grid-info-soft-register \
	    -log $registrationlog -f $registrationconf \
	    -p $pid >/dev/null 2>&1 &
    fi
    log_success_msg "$prog started"
}

stop () {
    if [ -f "/var/run/nordugrid-arc-inforeg.pid" ]; then
	pid=$(cat /var/run/nordugrid-arc-inforeg.pid)
    else
	log_failure_msg "$prog has no pid-file"
	return 1
    fi

    if [ -n "${pid}" ]; then
	kill -15 ${pid} 2>/dev/null
	ps ${pid} >/dev/null 2>&1
	if [ $? = 0 ]; then
	    sleep 2
	    ps ${pid} >/dev/null 2>&1
	    if [ $? = 0 ]; then
		kill -9 ${update_pid} 2>/dev/null
		sleep 2
		ps ${pid} >/dev/null 2>&1
		if [ $? = 0 ]; then
		    RETVAL=1
		fi
	    fi

	fi
    fi

    if [ ${RETVAL} = 0 ];  then
	rm -f /var/run/nordugrid-arc-inforeg.pid
	rm -f $lockfile
    else
	log_failure_msg "Could not kill $prog"
    fi

    if [ ! ${RETVAL} = 0 ];  then
	return 1
    else
	# lockfile is to make sure that bdii gets a clean shutdown with system
	rm -f $lockfile
    fi

    log_success_msg "$prog stopped"
    return ${RETVAL}
}

status ()  {
    RETVAL=0
    return ${RETVAL}
}

case "$1" in
    start)
	start
	;;
    stop)
	stop
	;;
    restart | force-reload)
	stop
	# avoid race
	sleep 3
	start
	;;
    reload)
	;;
    status)
	status
	;;
    condrestart | try-restart)
	if [ -f ${lockfile} ]; then
	    stop
	    # avoid race
	    sleep 3
	    start
	fi
	;;
    *)
	echo "Usage: $0 {start|stop|restart|force-reload|reload|condrestart|try-restart|status}"
	exit 1
	;;
esac

exit $RETVAL
