unicorn init script for multiple applicagtions

#!/bin/bash
### BEGIN INIT INFO
# Provides:          APPLICATION
# Required-Start:    $all
# Required-Stop:     $network $local_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start the APPLICATION unicorns at boot
# Description:       Enable APPLICATION at boot time.
### END INIT INFO
#
# init.d script for single or multiple unicorn installations. Expects at least one .conf 
# file in /etc/unicorn
#
# Modified by [email protected] http://github.com/agirorn
# based on http://gist.github.com/504875 by http://github.com/jaygooby and
# http://gist.github.com/420880 from http://blog.kiskolabs.com/post/722322392/unicorn-init-scripts
#
## A sample /etc/unicorn/my_app.conf
## 
## RAILS_ENV=production
## RAILS_ROOT=/var/apps/www/my_app/current
#
# This configures a unicorn master for your app at /var/apps/www/my_app/current running in
# production mode. It will read config/unicorn.rb for further set up. 
#
# You should ensure different ports or sockets are set in each config/unicorn.rb if
# you are running more than one master concurrently.
#
# If you call this script without any config parameters, it will attempt to run the
# init command for all your unicorn configurations listed in /etc/unicorn/*.conf
#
# /etc/init.d/unicorn start # starts all unicorns
#
# If you specify a particular config, it will only operate on that one
#
# /etc/init.d/unicorn start /etc/unicorn/my_app.conf

sig () {
  test -s $PID && kill -s $1 `cat $PID`
}

function setup_rvm() {
# LOAD RVM IF IT EXISTS
  if [ -f '/usr/local/lib/rvm' ]; then
    . '/usr/local/lib/rvm'
  fi
}

function setup() {
  setup_rvm
  COMMAND=$1
  if [ $2 ]; then
    UNICORN=/etc/unicorn/$2.conf
    start_stop
  else
    for UNICORN in /etc/unicorn/*.conf; do
      # import the variables
      start_stop
      # run the start/stop/etc command
      #cmd $1
    done
   fi
}

function start_stop() {
  . $UNICORN
  PID=$RAILS_ROOT/tmp/pids/unicorn.pid
  OLD_PID=$PID.oldbin
  CMD=" unicorn_rails -D -E $RAILS_ENV -c config/unicorn.rb"
  CD="cd $RAILS_ROOT"
  echo $UNICORN
  case $COMMAND in
    start)
      if [ -s $PID ] ; then
        echo >&2 "Already running"
      else
        echo "Starting" && $CD && $CMD
      fi
      ;;  
    stop)
      if [ -s $PID ] ; then
        echo "Stopping" && kill -s QUIT `cat $PID`
      else
        echo >&2 "Not running"
      fi
      ;;  
    force-stop)
      if [ -s $PID ] ; then
        echo "Forcing a stop" && kill -s TERM `cat $PID`
      else
        echo >&2 "Not running"
      fi
      ;;  
    restart|reload)
      echo "Restarting"
      if [ -s $PID ] ; then
        kill -s HUP `cat $PID`
      else
        $CD && $CMD
      fi
      ;;  
    upgrade)
      if [ -s $PID ] ; then
        echo "Upgraded" && kill -s USR2 `cat $PID`
      else
        echo >&2 "Not running"
      fi
      ;;  
    rotate)
      if [ -s $PID ] ; then
        echo "rotated logs OK" && kill -s USR1 `cat $PID`
      else
        echo >&2 "Not running"
      fi
      ;;  
    *)  
      echo >&2 "Usage: $0 <start|stop|restart|upgrade|rotate|force-stop>"
      exit 1
      ;;  
  esac
}
setup $1 $2

exit 0