def start_none
      unless options[:ontop]
        Daemonize.daemonize(output_logfile, @group.app_name)
      else
        Daemonize.simulate(output_logfile)
      end

      @pid.pid = Process.pid

      # We need this to remove the pid-file if the applications exits by itself.
      # Note that <tt>at_text</tt> will only be run if the applications exits by calling
      # <tt>exit</tt>, and not if it calls <tt>exit!</tt> (so please don't call <tt>exit!</tt>
      # in your application!
      #
      at_exit do
        begin; @pid.cleanup; rescue ::Exception; end

        # If the option <tt>:backtrace</tt> is used and the application did exit by itself
        # create a exception log.
        if options[:backtrace] && !options[:ontop] && !$daemons_sigterm
          begin; exception_log; rescue ::Exception; end
        end

      end

      # This part is needed to remove the pid-file if the application is killed by
      # daemons or manually by the user.
      # Note that the applications is not supposed to overwrite the signal handler for
      # 'TERM'.
      #
      trap(SIGNAL) do
        begin; @pid.cleanup; rescue ::Exception; end
        $daemons_sigterm = true

        if options[:hard_exit]
          exit!
        else
          exit
        end
      end
    end
def start_none
      unless options[:ontop]
        Daemonize.daemonize(output_logfile, @group.app_name)
      else
        Daemonize.simulate(output_logfile)
      end

      @pid.pid = Process.pid

      # We need this to remove the pid-file if the applications exits by itself.
      # Note that <tt>at_text</tt> will only be run if the applications exits by calling
      # <tt>exit</tt>, and not if it calls <tt>exit!</tt> (so please don't call <tt>exit!</tt>
      # in your application!
      #
      at_exit do
        begin; @pid.cleanup; rescue ::Exception; end

        # If the option <tt>:backtrace</tt> is used and the application did exit by itself
        # create a exception log.
        if options[:backtrace] && !options[:ontop] && !$daemons_sigterm
          begin; exception_log; rescue ::Exception; end
        end

      end

      # This part is needed to remove the pid-file if the application is killed by
      # daemons or manually by the user.
      # Note that the applications is not supposed to overwrite the signal handler for
      # 'TERM'.
      #
      trap(SIGNAL) do
        begin; @pid.cleanup; rescue ::Exception; end
        $daemons_sigterm = true

        if options[:hard_exit]
          exit!
        else
          exit
        end
      end
    end
this function is only used to daemonize the currently running process (Daemons.daemonize)