Bugs item #998246, was opened at 2004-07-26 12:14
Message generated for change (Comment added) made by nnorwitz
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Category: Python Library
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Tres Seaver (tseaver)
>Assigned to: Neal Norwitz (nnorwitz)
Summary: Popen3.poll race condition
Initial Comment:
poll() swallows all IOErrors, including ENOCHILD; if
the child process exits before poll is called, then an
applications which loops on
poll() will never exit.
I am working around this (against Python 2.3.3) via the
following:
try:
pid, status = os.waitpid(proc.pid,
os.WNOHANG)
except os.error, e:
if e.errno == 10: # ENOCHILD
result = 0
else:
raise
else:
if pid == proc.pid:
result = status
where 'proc' is an instance of Popen3.
----------------------------------------------------------------------
>Comment By: Neal Norwitz (nnorwitz)
Date: 2006-03-23 00:45
Message:
Logged In: YES
user_id=33168
I believe this is basically a duplicate of 1183780. There
is a patch attached there. Can you verify if it fixes your
problem?
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