def update_status sig=0
      pid_int = Integer("#{ @pid }")
      begin
        Process::kill sig, pid_int
        true
      rescue Errno::ESRCH
        false
      end
    end
def update_status sig=0
      pid_int = Integer("#{ @pid }")
      begin
        Process::kill sig, pid_int
        true
      rescue Errno::ESRCH
        false
      end
    end
Send an update signal to the process.

 @param sig [Integer] The signal to send, default 0 (or no action requested)