python-signal

 #!/usr/bin/python

import os,time
from signal import *

def get_sig(signum,stack):
    if signum==SIGINT:
        print "keep..."
    elif signum==SIGALRM:
        print "get an alarm"
    else:
        print "other signal"



alarm(7)
signal(SIGINT,get_sig)
signal(SIGALRM,get_sig)

print "my pid is ",os.getpid()

while True:
    print "waiting...."
    time.sleep(2)