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> x Open the file exclusively (like the O_EXCL flag of open(2)).
> If the file already exists, fopen() fails, and sets errno to EEXIST.
> This flag is ignored for fdopen().
Python 3.3 adds support for this mode: see issue #12760.
> e (since glibc 2.7)
> Open the file with the O_CLOEXEC flag. See open(2) for more information.
I created the issue #16850 for this mode.
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Other modes seem to be very specific to some platforms. I don't think that it would be possible to expose them in a portable way using the open() function directly.
Can we close this issue? I prefer to work on #16850 for the close-on-exec mode.