python signal捕捉信号 脚本

import sys, signal, time

def now(): return time.asctime()

def onSignal(signum, stackframe): # Python signal handler print('Got signal', signum, 'at', now()) # most handlers stay in effect if signum == signal.SIGCHLD: # but sigchld handler is not print('sigchld caught') #signal.signal(signal.SIGCHLD, onSignal)

signum = int(sys.argv[1]) signal.signal(signum, onSignal) # install signal handler while True: signal.pause() # sleep waiting for signals