asyncore alarm

asyncore-alarm.py

# encoding: utf-8
import asyncore
import socket
import signal

class SignalDispatcher(asyncore.dispatcher):
    def __init__(self):
        asyncore.dispatcher.__init__(self)
        # 0 for read, 1 for write
        self.pipefd = socket.socketpair(socket.AF_UNIX, socket.SOCK_STREAM, 0)
        self.pipefd[1].setblocking(0)
        self.set_socket(self.pipefd[0])
        signal.signal(signal.SIGALRM, self.handle_signal)

    def handle_read(self):
        print 'signal', self.recv(1024)

    def handle_signal(self, sig, frame):
        self.pipefd[1].send(str(sig))

sd = SignalDispatcher()
signal.alarm(1)
asyncore.loop()