#! /bin/sh
#
# init script for the TCP over ICMP tunnel daemon: ptunnel

### BEGIN INIT INFO
# Provides:          ptunnel
# Required-Start:    $local_fs $remote_fs $network
# Required-Stop:     $local_fs $remote_fs $network
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Run TCP over ICMP tunnelling daemon
### END INIT INFO

# Author: Jaap Eldering <eldering@a-eskwadraat.nl>
# Modified from ddhclient init script by Torsten Landschoff <torsten@debian.org>

PATH=/sbin:/bin:/usr/sbin:/usr/bin
NAME="ptunnel"
DAEMON=/usr/sbin/$NAME
DESC="TCP over ICMP tunnelling daemon"

# Don't run if not installed
test -f $DAEMON || exit 0

# Evaluate the config for the Debian scripts
run_daemon=false

if [ -r /etc/default/ptunnel ]; then
  . /etc/default/ptunnel
fi

PIDFILE=/var/run/$NAME.pid
OPTIONS="-daemon $PIDFILE ${password:+-x $password}"

# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh

# Define LSB log_* functions.
. /lib/lsb/init-functions

#
# Function that starts the daemon/service
#
do_start()
{
	if [ "$run_daemon" != "true" ]; then
		return 0
	fi

	# Return
	#   0 if daemon has been started
	#   1 if daemon was already running
	#   2 if daemon could not be started
	start-stop-daemon --test --start --quiet \
		--pidfile $PIDFILE --name $NAME --startas $DAEMON \
		>/dev/null \
		|| return 1

	start-stop-daemon --start --quiet \
		--pidfile $PIDFILE --name $NAME --startas $DAEMON \
		-- $OPTIONS \
		|| return 2
}

#
# Function that stops the daemon/service
#
do_stop()
{
	if [ "$run_daemon" != "true" ]; then
		return 0
	fi

	# Return
	#   0 if daemon has been stopped
	#   1 if daemon was already stopped
	#   2 if daemon could not be stopped
	#   other if a failure occurred
	start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 \
		--pidfile $PIDFILE --name $NAME
	return "$?"
}


case "$1" in
  start)
	if [ "$run_daemon" != "true" ]; then
		log_warning_msg "To run the ptunnel daemon, please set run_daemon to 'true' in /etc/default/ptunnel "
		log_end_msg 0
		exit 0
	fi
	[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
	do_start
	case "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  stop)
	if [ "$run_daemon" != "true" ]; then
		log_warning_msg "To run the ptunnel daemon, please set run_daemon to 'true' in /etc/default/ptunnel "
		log_end_msg 0
		exit 0
	fi
	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
	do_stop
	case "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;

  status)
        echo -n "Status of $DESC: "
        if [ ! -r "$PIDFILE" ]; then
                echo "$NAME is not running."
                exit 3
        fi
        if read pid < "$PIDFILE" && ps -p "$pid" > /dev/null 2>&1; then
                echo "$NAME is running."
                exit 0
        else
                echo "$NAME is not running but $PIDFILE exists."
                exit 1
        fi
        ;;
	
 
  restart|force-reload)
	if [ $run_daemon != "true" ]; then
		log_warning_msg "To run the ptunnel daemon, please set run_daemon to 'true' in /etc/default/ptunnel "
		log_end_msg 0
		exit 0
	fi
	log_daemon_msg "Restarting $DESC" "$NAME"
	do_stop
	case "$?" in
	  0|1)
		do_start
		case "$?" in
			0) log_end_msg 0 ;;
			1) log_end_msg 1 ;; # Old process is still running
			*) log_end_msg 1 ;; # Failed to start
		esac
		;;
	  *)
	  	# Failed to stop
		log_end_msg 1
		;;
	esac
	;;

  *)
	N=/etc/init.d/$NAME
	# echo "Usage: $N {start|stop|restart|reload|force-reload}" >&2
	log_success_msg "Usage: $N {start|stop|restart|force-reload}" 
	exit 1
	;;
esac

exit 0
