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return the new file descriptor from os.dup2 (closes bpo-32441) (#5041)

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Benjamin Peterson 2017-12-29 13:13:06 -08:00 • committed by GitHub
parent 03220fdb26
commit bbdb17d19b
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5 changed files with 50 additions and 32 deletions
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16
Lib/test/test_os.py
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@ -3079,19 +3079,15 @@ class FDInheritanceTests(unittest.TestCase):
# inheritable by default
fd2 = os.open(__file__, os.O_RDONLY)
try:
os.dup2(fd, fd2)
self.assertEqual(os.get_inheritable(fd2), True)
finally:
os.close(fd2)
self.addCleanup(os.close, fd2)
self.assertEqual(os.dup2(fd, fd2), fd2)
self.assertTrue(os.get_inheritable(fd2))
# force non-inheritable
fd3 = os.open(__file__, os.O_RDONLY)
try:
os.dup2(fd, fd3, inheritable=False)
self.assertEqual(os.get_inheritable(fd3), False)
finally:
os.close(fd3)
self.addCleanup(os.close, fd3)
self.assertEqual(os.dup2(fd, fd3, inheritable=False), fd3)
self.assertFalse(os.get_inheritable(fd3))
@unittest.skipUnless(hasattr(os, 'openpty'), "need os.openpty()")
def test_openpty(self):