RFR: 8291067: macOS should use O_CLOEXEC instead of FD_CLOEXEC [v7]

[David Holmes]

On Mon, 21 Nov 2022 19:31:14 GMT, Gerard Ziemski <gziemski at openjdk.org> wrote:

>> O_CLOEXEC is also available on macOS (__DARWIN_C_LEVEL >= 200809L), so use it same as on linux.
>
> Gerard Ziemski has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 11 commits:
> 
>  - Merge master
>  - rename test file to test_file.txt, so it's easy to determine the purpose of the artifact to however happens to be looking
>  - use open() to create the test file as needed
>  - create our own test file, to guarantee it will exist
>  - remove comment, fix spacing
>  - test on all platforms except Windows
>  - add test to verify that open(O_CLOEXEC) implies FD_CLOEXEC on macOS
>  - assume O_CLOEXEC on macOS
>  - match existing code
>  - add missing code from merge
>  - ... and 1 more: https://git.openjdk.org/jdk/compare/cd6a203a...db9d11a3

Still good

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Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.org/jdk/pull/9663