Ross Lagerwall <rosslagerw...@gmail.com> added the comment:

>> Also, the pure python implementation of subprocess for posix can now >> be 
>> updated to use pipe2 if it exists (previously on _posixsubprocess.c
>> used it).

> I don't understand the last part :-)
> What do you suggest?

Perhaps, os.pipe2 can be used if available, then a modified version of 
_posixsubprocess.cloexec_pipe without the check for pipe2 could be used as a 
fallback.

I'm not sure why there exists both a python and c implementation.

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<http://bugs.python.org/issue12196>
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