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40 lines
1.2 KiB
Python
40 lines
1.2 KiB
Python
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"""This test checks for correct wait4() behavior.
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"""
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import os
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import time
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import sys
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import unittest
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from test.fork_wait import ForkWait
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from test.support import reap_children, get_attribute
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# If either of these do not exist, skip this test.
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get_attribute(os, 'fork')
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get_attribute(os, 'wait4')
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class Wait4Test(ForkWait):
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def wait_impl(self, cpid):
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option = os.WNOHANG
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if sys.platform.startswith('aix'):
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# Issue #11185: wait4 is broken on AIX and will always return 0
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# with WNOHANG.
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option = 0
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deadline = time.monotonic() + 10.0
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while time.monotonic() <= deadline:
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# wait4() shouldn't hang, but some of the buildbots seem to hang
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# in the forking tests. This is an attempt to fix the problem.
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spid, status, rusage = os.wait4(cpid, option)
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if spid == cpid:
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break
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time.sleep(0.1)
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self.assertEqual(spid, cpid)
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self.assertEqual(status, 0, "cause = %d, exit = %d" % (status&0xff, status>>8))
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self.assertTrue(rusage)
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def tearDownModule():
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reap_children()
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if __name__ == "__main__":
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unittest.main()
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