[issue12105] open() does not able to set flags, such as O_CLOEXEC

[Марк Коренберг]

Марк Коренберг <socketpair at gmail.com> added the comment:

Why not to implement 'e' letter in py3k ?

In systems where O_CLOEXEC is not supported in open(), flag should be set non-atomically using fcntl.

To exclude races (in concurrent threads), this two ops should be done under lock (GIL?)

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<http://bugs.python.org/issue12105>
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