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

[STINNER Victor]

STINNER Victor <victor.stin...@haypocalc.com> added the comment:

Oh, by the way: it would also be nice to add os.O_CLOEXEC to Python 2.7.

For example, tempfile._mkstemp_inner() uses:
            fd = _os.open(file, flags, 0600)
            _set_cloexec(fd) # fcntl(fd, F_SETFD, flags | FD_CLOEXEC)
which is not atomic.

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