#!/bin/sh
#
# aprsc		Start or stop the aprsc server
#
# chkconfig: 2345 55 25
# description: Provide an APRS-IS server for the amateur radio APRS network
#
# processname: aprsc
# config: /opt/aprsc/etc/aprsc.conf
# pidfile: /opt/aprsc/logs/aprsc.pid

### BEGIN INIT INFO
# Provides:       aprsc
# Required-Start: $syslog $network $local_fs
# Required-Stop:  $syslog $local_fs
# Default-Start:  2 3 4 5
# Default-Stop:   0 1 6
# Short-Description: start and stop aprsc
# Description: aprsc provides an APRS-IS server for the amateur radio APRS network
### END INIT INFO


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

# pull in sysconfig settings
[ -f /etc/sysconfig/aprsc ] && . /etc/sysconfig/aprsc

RETVAL=0
NAME="aprsc"
prog="aprsc"
lockfile=/var/lock/subsys/$prog

DIRNAME=aprsc
BASEDIR=/opt/$DIRNAME
APRSC=$BASEDIR/sbin/aprsc
PID_FILE=$BASEDIR/logs/aprsc.pid

if [ "$STARTAPRSC" != "yes" ];then
	echo "Starting of $NAME not enabled in /etc/sysconfig/$NAME."
	exit 0
fi

# copy files required for chrooted operation
prepare_chroot () {
	echo "Preparing chroot for aprsc..."
	/bin/cp -p /etc/resolv.conf /etc/nsswitch.conf /etc/hosts /etc/gai.conf $BASEDIR/etc/
	# live upgrade requires libraries to be visible within chroot, so
	# set up a read-only bind mount of /lib
	grep -q "$DIRNAME/lib " /proc/mounts || \
		( mount --bind /lib $BASEDIR/lib \
		&& mount -o remount,ro,bind $BASEDIR/lib )
	if [ -e /lib64 ]; then
		grep -q "$DIRNAME/lib64 " /proc/mounts || \
			( mount --bind /lib64 $BASEDIR/lib64 \
			&& mount -o remount,ro,bind $BASEDIR/lib64 )
	fi
	grep -q "$DIRNAME/usr/lib " /proc/mounts || \
		( mount --bind /usr/lib $BASEDIR/usr/lib \
		&& mount -o remount,ro,bind $BASEDIR/usr/lib )
	if [ -e /usr/lib64 ]; then
		grep -q "$DIRNAME/usr/lib64 " /proc/mounts || \
			( mount --bind /usr/lib64 $BASEDIR/usr/lib64 \
			&& mount -o remount,ro,bind $BASEDIR/usr/lib64 )
	fi
}

check_configuration() {
  	echo "Testing aprsc configuration..."
	if ! $APRSC $DAEMON_OPTS -y > /dev/null 2>&1; then
		$APRSC $DAEMON_OPTS -y || true
		exit 1
	fi
}

start()
{
	[ -x $APRSC ] || exit 5
	[ -f /opt/aprsc/etc/aprsc.conf ] || exit 6
	prepare_chroot
	ulimit -c unlimited

	echo -n $"Starting $prog: "
	$APRSC $DAEMON_OPTS && success || failure
	RETVAL=$?
	[ $RETVAL -eq 0 ] && touch $lockfile
	echo
	return $RETVAL
}

stop()
{
	echo -n $"Stopping $prog: "
	if [ -f $PID_FILE ] ; then
	    killproc -p $PID_FILE $APRSC
	else
	    failure $"Stopping $prog"
	fi
	RETVAL=$?
	[ $RETVAL -eq 0 ] && rm -f $lockfile
	echo
}

reload()
{
	check_configuration
	echo -n $"Reloading $prog: "
	if [ -f $PID_FILE ] ; then
	    killproc -p $PID_FILE $APRSC -USR1
	else
	    failure $"Reloading $prog"
	fi
	RETVAL=$?
	echo
}

liveupgrade()
{
	check_configuration
	prepare_chroot
	echo -n $"Performing live upgrade of $prog: "
	if [ -f $PID_FILE ] ; then
	    killproc -p $PID_FILE $APRSC -USR2
	else
	    failure $"Performing live upgrade of $prog"
	fi
	RETVAL=$?
	echo
}

restart() {
	check_configuration
	stop
	start
}

force_reload() {
	restart
}

rh_status() {
	status -p $PID_FILE aprsc
}

rh_status_q() {
	rh_status >/dev/null 2>&1
}

case "$1" in
	start)
		rh_status_q && exit 0
		start
		;;
	stop)
		if ! rh_status_q; then
			rm -f $lockfile
			exit 0
		fi
		stop
		;;
	restart)
		restart
		;;
	reload)
		rh_status_q || exit 7
		reload
		;;
	liveupgrade)
		rh_status_q || exit 7
		liveupgrade
		;;
	force-reload)
		force_reload
		;;
	condrestart|try-restart)
		rh_status_q || exit 0
		if [ -f $lockfile ] ; then
			if [ $RETVAL -eq 0 ] ; then
				stop
				# avoid race
				sleep 3
				start
			else
				RETVAL=6
			fi
		fi
		;;
	status)
		rh_status
		RETVAL=$?
		if [ $RETVAL -eq 3 -a -f $lockfile ] ; then
			RETVAL=2
		fi
		;;
	*)
		echo $"Usage: $0 {start|stop|restart|reload|force-reload|condrestart|try-restart|liveupgrade|status}"
		RETVAL=2
esac
exit $RETVAL