luncher script for Isso

isso.sh

#!/bin/sh
### BEGIN INIT INFO
# Provides:          isso
# Required-Start:    $local_fs $network
# Required-Stop:     $local_fs $network
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Description:       lightweight Disqus alternative
### END INIT INFO

EXEC=/usr/local/bin/isso
EXEC_OPTS="-c /etc/isso.ini run"

RUNAS=isso
PIDFILE=/var/run/isso.pid

start() {

  if [ -f $PIDFILE ];then
	PID=$(cat $PIDFILE)
	ps -p $PID > /dev/null 2>&1
	if [ $? -eq "0" ];then
		echo "Process already running with PID $PID"
		exit
	fi
  fi

  echo 'Starting service…' >&2
  start-stop-daemon --start --chuid $RUNAS --background --make-pidfile --pidfile $PIDFILE \
                    --exec $EXEC -- $EXEC_OPTS
}

stop() {
  if [ ! -f $PIDFILE ];then
	echo "Service already stop"
	exit
  fi

  echo 'Stopping service…' >&2
  start-stop-daemon --stop --chuid $RUNAS --pidfile $PIDFILE
  rm $PIDFILE
}

case "$1" in
  start)
    start
    ;;
  stop)
    stop
    ;;
  restart)
    stop
    sleep 2
    start
    ;;
  *)
    echo "Usage: $0 {start|stop|restart}"
esac