[issue6559] [PATCH]add pass_fds paramter to subprocess.Popen()

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

The reason os.closerange() is used is that it can be slow to call
os.close() on lots of fds (I suppose this depends on the OS). See
http://code.python.org/hg/trunk/rev/43caff85ec85

Therefore, the patch should be smart enough to continue using
os.closerange() on ranges of contiguous FDs to be closed.

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nosy: +pitrou

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