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bpo-46016: fcntl module add FreeBSD's F_DUP2FD_CLOEXEC flag support.#29993

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vstinner merged 2 commits into
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devnexen:fcntl_module_fbsd_update
Dec 8, 2021
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bpo-46016: fcntl module add FreeBSD's F_DUP2FD_CLOEXEC flag support.#29993
vstinner merged 2 commits into
python:mainfrom
devnexen:fcntl_module_fbsd_update

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@devnexen

@devnexen devnexen commented Dec 8, 2021 •
edited by bedevere-bot
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@devnexen devnexen changed the title fcntl module add FreeBSD's F_DUP2FD_CLOEXEC flag support. bpo-46016: fcntl module add FreeBSD's F_DUP2FD_CLOEXEC flag support. Dec 8, 2021
vstinner
vstinner reviewed Dec 8, 2021
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Comment thread Misc/NEWS.d/next/Library/2021-12-08-19-15-03.bpo-46016.s9PuyF.rst Outdated

@vstinner vstinner Dec 8, 2021

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I would be nice to document the constant somewhere in Doc/library/fcntl.rst:
https://docs.python.org/dev/library/fcntl.html

You can also document the new constant in What's New in Python 3.11, add a new "fcntl" section to:
https://docs.python.org/dev/whatsnew/3.11.html#improved-modules

@devnexen devnexen force-pushed the fcntl_module_fbsd_update branch from ce5ef5b to fbaeb28 Compare December 8, 2021 19:39
@ronaldoussoren

ronaldoussoren commented Dec 8, 2021

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Similar functionality on Linux is exposed through os.dup (the inherited flag, see https://docs.python.org/3.11/library/os.html?highlight=os.dup2#os.dup2). It might be better to do the same for FreeBSD (and macOS) as well.

@tiran

tiran commented Dec 8, 2021

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The bugs.python.org ticket for this PR is empty. Please update the ticket with an explanation what you are trying to archive.

@vstinner vstinner merged commit 267539b into python:main Dec 8, 2021
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vstinner commented Dec 8, 2021

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Merged, thanks. Adding 2 constants is fine.

It would be great to document properly each constant in the fcntl doc (not only these 2 constants), but it can be done in a separated PR.

os.dup2() has a fcntl(fd, F_DUP2FD_CLOEXEC, fd2) implementation. Is it used on FreeBSD?

@vstinner

vstinner commented Dec 8, 2021

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Similar functionality on Linux is exposed through os.dup (the inherited flag, see https://docs.python.org/3.11/library/os.html?highlight=os.dup2#os.dup2). It might be better to do the same for FreeBSD (and macOS) as well.

F_DUP2FD / F_DUP2FD_CLOEXEC is more about os.dup2(), no? As I wrote, F_DUP2FD_CLOEXEC is already used by os.dup2() if available. I dont know if it is used on macOS. I no longer have access to a macOS machine to develop Python on it.

tiran pushed a commit that referenced this pull request Dec 9, 2021
@kumaraditya303
bpo-46016: Fix rest syntax of GH-29993 (GH-30006)
b123ad8
@vstinner vstinner mentioned this pull request Dec 9, 2021
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@devnexen @ronaldoussoren @tiran @vstinner @the-knights-who-say-ni @bedevere-bot