Dreamwidth worker-manager init.d script

worker-manager

#!/bin/bash
# /etc/init.d/worker-manager
# version 0.1 2012-12-17 (YYYY-MM-DD)

### BEGIN INIT INFO
# Provides:   worker-manager
# Required-Start: $local_fs $remote_fs
# Required-Stop:  $local_fs $remote_fs
# Default-Start:  2 3 4 5
# Default-Stop:   0 1 6
# Short-Description: DW worker manager
# Description:       Starts DW worker manager
### END INIT INFO

#Settings
SERVICE='worker-manager'
OPTIONS='' # e.g --debug, also could be used to route output to a logfile
USERNAME='dw'
LJHOME='/home/dw'
INVOCATION="$LJHOME/bin/worker-manager $OPTIONS"

ME=`whoami`
as_user() {
  if [ $ME == $USERNAME ] ; then
    bash -c "$1"
  else
    su - $USERNAME -c "$1"
  fi
}

wm_start() {
  if  pgrep -u $USERNAME -f $SERVICE > /dev/null
  then
    echo "$SERVICE is already running!"
  else
    echo "Starting $SERVICE..."
    cd $LJHOME
    as_user "cd $LJHOME && $INVOCATION"
    sleep 1
    if pgrep -u $USERNAME -f $SERVICE > /dev/null
    then
      echo "$SERVICE started."
    else
      echo "Error! Could not start $SERVICE!"
    fi
  fi
}

wm_stop() {
  if pgrep -u $USERNAME -f $SERVICE > /dev/null
  then
    echo "Stopping $SERVICE"
    as_user "pkill $SERVICE"
    sleep 3
  else
    echo "$SERVICE was not running."
  fi
  if pgrep -u $USERNAME -f $SERVICE > /dev/null
  then
    echo "$SERVICE could not be stopped."
  else
    echo "$SERVICE is stopped."
  fi
}

#Start-Stop here
case "$1" in
  start)
    wm_start
    ;;
  stop)
    wm_stop
    ;;
  restart)
    wm_stop
    wm_start
    ;;
  status)
    if pgrep -u $USERNAME -f $SERVICE > /dev/null
    then
      echo "$SERVICE is running."
    else
      echo "$SERVICE is not running."
    fi
    ;;

  *)
  echo "Usage: $0 {start|stop|status|restart}"
  exit 1
  ;;
esac

exit 0