gistfile1.rb

    def daemonize
      trap(:USR1) { exit!(0) }

      pid = fork do
              ppid = Process.ppid

              Process.daemon(true)

              begin
                Process.kill(:USR1, ppid)
              rescue Errno::ESRCH
              end
            end

      if pid
        loop { sleep 10 }
      end

      trap(:USR1, "DEFAULT")
    end