1 """This test checks for correct wait4() behavior. 2 """ 3 4 import os 5 import time 6 from test.fork_wait import ForkWait 7 from test.test_support import run_unittest, reap_children, get_attribute 8 9 # If either of these do not exist, skip this test. 10 get_attribute(os, 'fork') 11 get_attribute(os, 'wait4') 12 13 14 class Wait4Test(ForkWait): 15 def wait_impl(self, cpid): 16 for i in range(10): 17 # wait4() shouldn't hang, but some of the buildbots seem to hang 18 # in the forking tests. This is an attempt to fix the problem. 19 spid, status, rusage = os.wait4(cpid, os.WNOHANG) 20 if spid == cpid: 21 break 22 time.sleep(1.0) 23 self.assertEqual(spid, cpid) 24 self.assertEqual(status, 0, "cause = %d, exit = %d" % (status&0xff, status>>8)) 25 self.assertTrue(rusage) 26 27 def test_main(): 28 run_unittest(Wait4Test) 29 reap_children() 30 31 if __name__ == "__main__": 32 test_main() 33
