debian init.d script

[omry]

#! /bin/sh
### BEGIN INIT INFO
# Provides:          pencil
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: pencil graphite frontend
# Description:       Starts pencil graphite frontend
### END INIT INFO

# Author: Omry Yadan

# Source init-functions:
#source /lib/lsb/init-functions
. /lib/lsb/init-functions

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

# Path to Executable
DAEMON=/var/lib/gems/1.8/gems/pencil-0.2.10/bin/pencil

PIDFILE=/var/run/pencil.pid

SCRIPTNAME=/etc/init.d/pencil

ARGS="-d /etc/pencil"

# Exit if the package is not installed
if [ ! -x "$DAEMON" ]; then {
    echo "Couldn't find $DAEMON or not executable"
    exit 99
}
fi

# Load the VERBOSE setting and other rcS variables
[ -f /etc/default/rcS ] && . /etc/default/rcS

#
# Function that starts the daemon/service
#
do_start()
{
    # Return
    #   0 if daemon has been started
    #   1 if daemon was already running
    #   2 if daemon could not be started

        # Test to see if the daemon is already running - return 1 if it is. 
    start-stop-daemon --start --pidfile $PIDFILE \
        --exec $DAEMON --test -- start $ARGS > /dev/null || return 1

        # Start the daemon for real, return 2 if failed
    start-stop-daemon --background --start --make-pidfile --pidfile $PIDFILE --exec $DAEMON $ARGS || return 2
}

#
# Function that stops the daemon/service
#
do_stop() {
    # 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
    log_daemon_msg "Stopping $DESC" "$NAME"
    start-stop-daemon --stop --signal 2 --retry 5 --quiet --pidfile $PIDFILE
    RETVAL="$?"
    [ "$RETVAL" = 2 ] && return 2

        # Delete the exisitng PID file
    if [ -e "$PIDFILE" ]; then {
        rm $PIDFILE
    }  
        fi

        return "$RETVAL"
}


# Display / Parse Init Options
case "$1" in
  start)
     [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
      do_start
      case "$?" in
        0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
        2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
      esac
  ;;
  stop)
     [ "$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
  ;;
  restart)
    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
  ;;
  status)
      if [ -s $PIDFILE ]; then
          pid=`cat $PIDFILE`
          kill -0 $pid >/dev/null 2>&1
          if [ "$?" = "0" ]; then
              echo "$NAME is running: pid $pid."
              RETVAL=0
          else
              echo "Couldn't find pid $pid for $NAME."
              RETVAL=1
          fi
      else
          echo "$NAME is stopped (no pid file)."
          RETVAL=1
      fi
      return $RETVAL
  ;;
  *)
  echo "Usage: $SCRIPTNAME {start|stop|restart|status}" >&2
  exit 3
  ;;
esac
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