Method: Thin::Daemonizable::ClassMethods#send_signal

Defined in:
lib/thin/daemonizing.rb

#send_signal(signal, pid_file, timeout = 60) ⇒ Object

Send a signal to the process which PID is stored in pid_file.



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# File 'lib/thin/daemonizing.rb', line 135

def send_signal(signal, pid_file, timeout=60)
  if pid = read_pid_file(pid_file)
    Logging.log_info "Sending #{signal} signal to process #{pid} ... "

    Process.kill(signal, pid)

    # This loop seems kind of racy to me...
    started_at = monotonic_time
    while Process.running?(pid)
      sleep 0.1
      raise Timeout::Error if (monotonic_time - started_at) > timeout
    end
  else
    raise PidFileNotFound, "Can't stop process, no PID found in #{pid_file}"
  end
rescue Timeout::Error
  Logging.log_info "Timeout!"
  force_kill(pid, pid_file)
rescue Interrupt
  force_kill(pid, pid_file)
rescue Errno::ESRCH # No such process
  Logging.log_info "process not found!"
  force_kill(pid, pid_file)
end