[issue8052] subprocess close_fds behavior should only close open fds

[Charles-Francois Natali]

Charles-Francois Natali <neologix at free.fr> added the comment:

Ooops, it's of course not going to break code containing accept + fork or pipe + fork, you obviously also need an execve ;-)
But the point is that you can't change the semantics of FDs being inheritable across an execve (think about inetd for example).

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<http://bugs.python.org/issue8052>
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