Planetary Annihilation NodePAMaster init.d service control script

planetary

#!/bin/bash
# /etc/init.d/planetary
# version 0.0.2 2015-04-25 (YYYY-MM-DD)
# caveat emptor, don't copy and paste and just hope it'll work, READ AND COMPREHEND.

### BEGIN INIT INFO
# Provides:   planetary
# Required-Start: $local_fs $remote_fs
# Required-Stop:  $local_fs $remote_fs
# Should-Start:   $network
# Should-Stop:    $network
# Default-Start:  2 3 4 5
# Default-Stop:   0 1 6
# Short-Description:    planetary annihilation server
# Description:    Starts the planetary annihilation server
### END INIT INFO

#Settings
#set this a word out of the server's name as specified in your nodepamaster config, do not put in spaces, just one word or pgrep will be unhappy.
#this just helps the script to find the server process itself via its name, for status monitoring.
SERVICE='GOAT'
#this is the user the server is running under
USERNAME='planetary'
#base home dir for pa user, papatcher should be here, not using this yet, but prep for update command being written.
PAPATH='/home/planetary'
#nodepamaster folder should be in the pa user's home dir
NODEPAMASTER="${PAPATH}"/NodePAMaster/src
#nodepamaster invocation command
INVOCATION="nodejs control.js"
ME=`whoami`

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

pa_start() {
  if  pgrep -u $USERNAME -f "${SERVICE}" > /dev/null
  then
    echo "$SERVICE is already running!"
  else
    echo "Starting $SERVICE..."
    cd "${NODEPAMASTER}"
    as_user "cd '${NODEPAMASTER}' && screen -dmS planetary $INVOCATION"
    sleep 2
    if pgrep -u $USERNAME -f "${SERVICE}" > /dev/null
    then
      echo "$SERVICE is now running."
    else
      echo "Error! Could not start $SERVICE!"
    fi
  fi
}

pa_stop() {
  if pgrep -u $USERNAME -f "${SERVICE}" > /dev/null
  then
    echo "Stopping $SERVICE"
    as_user "screen -p 0 -S planetary -X quit"
  else
    echo "$SERVICE was not running."
  fi
  if pgrep -u $USERNAME -f "${SERVICE}" > /dev/null
  then
    echo "Error! $SERVICE could not be stopped."
  else
    echo "$SERVICE is stopped."
  fi
}

pa_update() {
  if pgrep -u $USERNAME -f "${SERVICE}" > /dev/null
  then
    echo "$SERVICE is running! Will not start update."
  else
    echo "TODO: Update Script"
  fi
}

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

  *)
  echo "Usage: /etc/init.d/planetary {start|stop|update|status|restart}"
  exit 1
  ;;
esac

exit 0