#!/bin/sh
#
# Copyright (c) 2015 Brian McGillion
#
#      This program is free software; you can redistribute it and/or modify
#      it under the terms of the GNU General Public License as published by
#      the Free Software Foundation, version 2.
#
#      This program is distributed in the hope that it will be useful, but
#      WITHOUT ANY WARRANTY; without even the implied warranty of
#      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
#      General Public License for more details.
#
#      You should have received a copy of the GNU General Public
#      License along with this program; if not, write to the Free Software
#      Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
#      02110-1301 USA
#
# Description: Initialize Open-TEE
#
### BEGIN INIT INFO
# Provides:          opentee-engine
# Required-Start:    $remote_fs $local_fs
# Required-Stop:     $remote_fs $local_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Utility to set up opentee
# Description:       Open-TEE is a framework for debugging GP compliant\
#                    TA and CA code.
### END INIT INFO

DESC="Open-TEE (opentee-engine)"
CONF="/etc/opentee.conf"

# Check whether opentee config file exists
if [ ! -f $CONF ]; then
	echo "No conf file exists"
	exit 1
fi

# determine the opentee binary
PROG=$(awk -F "=" '$1!~/^#/ && /opentee_bin/ {print $2}' $CONF)
if [ ! $PROG ]; then
	echo "Could not find binary name for opentee"
	exit 2
fi

PROG_NAME=`basename $PROG`
USER_PID="/tmp/opentee/$PROG_NAME.pid"
ROOT_PID="/var/run/opentee/$PROG_NAME.pid"

start_opentee() {
	echo "Starting $DESC ..."
	$PROG
	echo "done."
}

stop_opentee() {
	pid=0
	if [ -e $USER_PID ]; then
		pid=`cat $USER_PID`
	elif [ -e $ROOT_PID ]; then
		pid=`cat $ROOT_PID`
	else
		echo "Can't find the PID file"
		exit 3
	fi

	echo "Stopping $DESC (pid = $pid) ..."
	kill $pid
	echo "done."
}

case "$1" in
   start)
		start_opentee
		;;
   status)
		echo "TO DO, test if the pid file is locked"
		;;
   reload|force-reload|restart|try-restart)
		echo "Reloading $DESC ..."
		stop_opentee
		start_opentee
		echo "Reload done."
		;;
   stop)
		stop_opentee
		;;
   *)
		echo $"Usage: $0 {start|stop|reload|force-reload|restart|try-restart|status}"
		exit 4
		;;
esac

exit 0