daemon script

This shell script runs forever and checks if the rails worker is running and if not it starts it again:

while :
do
  if ps ax | grep -v grep | grep 'rails worker' > /dev/null
  then
      echo "service running, everything is fine"
      sleep 5
  else
      echo "service is not running. Lets start again"
      cd $APP_ROOT
      $BUNDLE exec unicorn_rails -D -c $CONF
      echo "restarted on $(cat /rails/pids/unicorn.pid)"
      sleep 15
  fi
done