import signal
import time
import subprocess

def set_handler(process, timeout):
    def handler(signum, frame):
        print "Handler is called at %s" % time.strftime("%H:%M:%S")
        process.terminate()
        print 'Terminated process %d' % process.pid
    signal.signal(signal.SIGALRM, handler)
    signal.alarm(timeout)

print 'Started at %s' % time.strftime("%H:%M:%S")
proc = subprocess.Popen(['/bin/sleep', '100'])

set_handler(proc, 5)

proc.wait()

print 'Finished at %s' % time.strftime("%H:%M:%S")
signal.alarm(0)