kill process if timeout Python

Shell Programming and Scripting
1

I have a python script that calls a binary. I want to make sure that if the binary fails (with a 2 min timeout) it kills the process. Currently I'm unable to do that as I only kill the function but the binary is still running. Please help

#!/usr/bin/python26

from optparse import OptionParser

import nagios
import re
import subprocess
import commands
import signal
import time

...
...
...

class Alarm(Exception):
    pass

def alarm_handler(signum, frame):
    raise Alarm

signal.signal(signal.SIGALRM, alarm_handler)
signal.alarm(120)  # 2 minutes

def check_blaze_login(serviceName, rdir, masterAcct, persona, passwd):
    cmd = TESTHARNESS_PATH + ' -s ' + serviceName + ' -r ' + rdir + \
          ' -m ' + masterAcct + ' -p ' + persona + ' -P ' + passwd

  

 try:
                        status, info, prof = check_blaze_login(options.serviceName, options.rdir, options.masterAcct,
 options.persona, options.passwd)
                        signal.alarm(0)
                except Alarm:
                        status = nagios.STATUS_WARN
                        info = 'testharness timed out!'
                        prof = ''