| """This test checks for correct wait4() behavior. | |
| """ | |
| import os | |
| import time | |
| from test.fork_wait import ForkWait | |
| from test.test_support import run_unittest, reap_children, get_attribute | |
| # If either of these do not exist, skip this test. | |
| get_attribute(os, 'fork') | |
| get_attribute(os, 'wait4') | |
| class Wait4Test(ForkWait): | |
| def wait_impl(self, cpid): | |
| for i in range(10): | |
| # wait4() shouldn't hang, but some of the buildbots seem to hang | |
| # in the forking tests. This is an attempt to fix the problem. | |
| spid, status, rusage = os.wait4(cpid, os.WNOHANG) | |
| if spid == cpid: | |
| break | |
| time.sleep(1.0) | |
| self.assertEqual(spid, cpid) | |
| self.assertEqual(status, 0, "cause = %d, exit = %d" % (status&0xff, status>>8)) | |
| self.assertTrue(rusage) | |
| def test_main(): | |
| run_unittest(Wait4Test) | |
| reap_children() | |
| if __name__ == "__main__": | |
| test_main() |