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#!/usr/bin/env python
import time,os
class TimeoutException(Exception):
def __init__(self, msg):
self.msg = msg
def __str__(self):
return repr(self.msg)
class ProcessTimer(object):
'''Timeout function for controlling a subprocess.Popen instance.
Naive implementation using busy loop, see later other means
of doing this.
'''
def __init__(self, proc, timeout):
self.proc = proc
self.timeout = timeout
def waitfor(self):
time_passed = 0
while(self.proc.poll() is None and time_passed < self.timeout):
time_passed = time_passed + 1
time.sleep(1)
if time_passed >= self.timeout:
raise TimeoutException("Timeout expired, possible deadlock")
if __name__ == "__main__":
#simple example
from subprocess import Popen
proc = Popen(['sleep','10'])
t = ProcessTimer(proc,5)
try:
t.waitfor()
except TimeoutException:
print "timeout - PID: %d" % (t.proc.pid)
#TODO: detect SO and kill accordingly
#Linux
os.kill(t.proc.pid, 9)
#Windows (not tested)
#subprocess.Popen("taskkill /F /T /PID %i"%handle.pid , shell=True)
print "exit code: %d" % (t.proc.poll())
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