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Fixes issue #14396: Handle the odd rare case of waitpid returning 0

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when not expected in subprocess.Popen.wait().
This commit is contained in:
Gregory P. Smith 2012-11-10 21:06:18 -08:00
commit f328d79223
2 changed files with 10 additions and 3 deletions
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10
Lib/subprocess.py
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@ -1509,9 +1509,13 @@ class Popen(object):
raise TimeoutExpired(self.args, timeout)
delay = min(delay * 2, remaining, .05)
time.sleep(delay)
elif self.returncode is None:
(pid, sts) = self._try_wait(0)
self._handle_exitstatus(sts)
else:
while self.returncode is None:
(pid, sts) = self._try_wait(0)
# Check the pid and loop as waitpid has been known to return
# 0 even without WNOHANG in odd situations. issue14396.
if pid == self.pid:
self._handle_exitstatus(sts)
return self.returncode