[issue5870] subprocess.DEVNULL

[Georg Brandl]

Georg Brandl <georg at python.org> added the comment:

Hmm, we don't like these open-for-eternity file descriptors; we had such a thing for os.urandom() but removed it (see #1177468).

I'm okay with DEVNULL (or even just NULL) as a shorthand, but it should open (and close) the devnull device each time just as if a normal fd was given.

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nosy: +georg.brandl

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