unicorn lsb init script for huginn

unicorn

#! /bin/sh
### BEGIN INIT INFO
# Provides:          unicorn
# Required-Start:    $syslog $networking
# Required-Stop:     $syslog $networking
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Unicorn APP Server
# Description:       Debian init script for the Unicorn APP Server
#                    scheduler
### END INIT INFO

PATH=/usr/local/bin:/bin:/usr/bin:/sbin:/usr/sbin

# application variables
NAME="unicorn"
TIMEOUT=${TIMEOUT-60}
PWD=/var/www/huginn
DAEMON="/usr/local/bin/unicorn"
DAEMON_OPTS="-D -c $PWD/config/unicorn.rb -E production"
PIDFILE="$PWD/tmp/pids/unicorn.pid"

. /lib/lsb/init-functions

case "$1" in
  start)
    if [ -e $PIDFILE ]; then
      status_of_proc -p $PIDFILE $DAEMON "$NAME process" && status="0" || status="$?"
      if [ "$status" = "0" ]; then
        exit
      fi
    fi
    log_daemon_msg "Starting unicorn app server" "$NAME"
    cd $PWD || exit 1
    start-stop-daemon --quiet --oknodo --pidfile $PIDFILE --exec $DAEMON --start -- $DAEMON_OPTS
    log_end_msg $?
    ;;
  stop)
    if [ -e $PIDFILE ]; then
      status_of_proc -p $PIDFILE $DAEMON "$NAME process" && status="0" || status="$?"
      if [ "$status" = "0" ]; then
        start-stop-daemon --stop --quiet --oknodo --pidfile $PIDFILE
        /bin/rm -f $PIDFILE
      fi
    else
      log_daemon_msg "$NAME process is not running"
      log_end_msg 0
    fi
    ;;
  upgrade)
    if [ -e $PIDFILE ]; then
      start-stop-daemon --signal HUP --pidfile $PIDFILE --stop
      log_success_msg "$NAME process reloaded successfully"
    else
      log_failure_msg "$PIDFILE does not exists"
    fi
    ;;
  reload)
    if [ -e $PIDFILE ]; then
      start-stop-daemon --signal USR2 --pidfile $PIDFILE --stop
      log_success_msg "$NAME process reloaded successfully"
    else
      log_failure_msg "$PIDFILE does not exists"
    fi
    ;;
  restart)
    $0 stop && sleep 1 && $0 start
    ;;
  status)
    if [ -e $PIDFILE ]; then
      status_of_proc -p $PIDFILE $DAEMON "$NAME process" && exit 0 || exit $?
    else
      log_daemon_msg "$NAME process is not running"
      log_end_msg 0
    fi
    ;;
  *)
    echo "Usage: $0 {start|stop|reload|restart|upgrade|status}"
    exit 2
    ;;
esac