1 """This test checks for correct wait3() behavior. 2 """ 3 4 import os 5 import time 6 import unittest 7 from test.fork_wait import ForkWait 8 from test.support import reap_children 9 10 if not hasattr(os, 'fork'): 11 raise unittest.SkipTest("os.fork not defined") 12 13 if not hasattr(os, 'wait3'): 14 raise unittest.SkipTest("os.wait3 not defined") 15 16 class Wait3Test(ForkWait): 17 def wait_impl(self, cpid): 18 # This many iterations can be required, since some previously run 19 # tests (e.g. test_ctypes) could have spawned a lot of children 20 # very quickly. 21 deadline = time.monotonic() + 10.0 22 while time.monotonic() <= deadline: 23 # wait3() shouldn't hang, but some of the buildbots seem to hang 24 # in the forking tests. This is an attempt to fix the problem. 25 spid, status, rusage = os.wait3(os.WNOHANG) 26 if spid == cpid: 27 break 28 time.sleep(0.1) 29 30 self.assertEqual(spid, cpid) 31 self.assertEqual(status, 0, "cause = %d, exit = %d" % (status&0xff, status>>8)) 32 self.assertTrue(rusage) 33 34 def tearDownModule(): 35 reap_children() 36 37 if __name__ == "__main__": 38 unittest.main() 39
