| 1 | n/a | """This test checks for correct wait4() behavior. |
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| 2 | n/a | """ |
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| 3 | n/a | |
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| 4 | n/a | import os |
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| 5 | n/a | import time |
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| 6 | n/a | import sys |
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| 7 | n/a | import unittest |
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| 8 | n/a | from test.fork_wait import ForkWait |
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| 9 | n/a | from test.support import reap_children, get_attribute |
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| 10 | n/a | |
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| 11 | n/a | # If either of these do not exist, skip this test. |
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| 12 | n/a | get_attribute(os, 'fork') |
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| 13 | n/a | get_attribute(os, 'wait4') |
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| 14 | n/a | |
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| 15 | n/a | |
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| 16 | n/a | class Wait4Test(ForkWait): |
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| 17 | n/a | def wait_impl(self, cpid): |
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| 18 | n/a | option = os.WNOHANG |
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| 19 | n/a | if sys.platform.startswith('aix'): |
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| 20 | n/a | # Issue #11185: wait4 is broken on AIX and will always return 0 |
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| 21 | n/a | # with WNOHANG. |
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| 22 | n/a | option = 0 |
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| 23 | n/a | deadline = time.monotonic() + 10.0 |
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| 24 | n/a | while time.monotonic() <= deadline: |
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| 25 | n/a | # wait4() shouldn't hang, but some of the buildbots seem to hang |
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| 26 | n/a | # in the forking tests. This is an attempt to fix the problem. |
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| 27 | n/a | spid, status, rusage = os.wait4(cpid, option) |
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| 28 | n/a | if spid == cpid: |
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| 29 | n/a | break |
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| 30 | n/a | time.sleep(0.1) |
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| 31 | n/a | self.assertEqual(spid, cpid) |
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| 32 | n/a | self.assertEqual(status, 0, "cause = %d, exit = %d" % (status&0xff, status>>8)) |
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| 33 | n/a | self.assertTrue(rusage) |
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| 34 | n/a | |
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| 35 | n/a | def tearDownModule(): |
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| 36 | n/a | reap_children() |
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| 37 | n/a | |
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| 38 | n/a | if __name__ == "__main__": |
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| 39 | n/a | unittest.main() |
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