[issue8052] subprocess close_fds behavior should only close open fds

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

Can we use FD_CLOEXEC to archive this goal? Example: open all files with FD_CLOEXEC set and don't close explicitly files on fork. preexec_fn will get access to the files, but the problem is exec(), not preexec_fn.

I suppose that it will slow down programs not using subprocess, and it may have border effects.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue8052>
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