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Title: gh-91401: Add a failsafe way to disable vfork. by gpshead · Pull Request #91490 · python/cpython · GitHub

Open Graph Title: gh-91401: Add a failsafe way to disable vfork. by gpshead · Pull Request #91490 · python/cpython

X Title: gh-91401: Add a failsafe way to disable vfork. by gpshead · Pull Request #91490 · python/cpython

Description: Just in case there is ever an issue with _posixsubprocess's use of vfork() due to the complexity of using it properly and potential directions that Linux platforms where it defaults to on could take, this adds a failsafe so that users can disable its use entirely by setting a global flag. No known reason to disable it exists. But it'd be a shame to encounter one and not be able to use CPython without patching and rebuilding it. See the linked issue for some discussion on reasoning.

Open Graph Description: Just in case there is ever an issue with _posixsubprocess's use of vfork() due to the complexity of using it properly and potential directions that Linux platforms where it defaults to on could...

X Description: Just in case there is ever an issue with _posixsubprocess's use of vfork() due to the complexity of using it properly and potential directions that Linux platforms where it defaults to on c...

Opengraph URL: https://github.com/python/cpython/pull/91490

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aba06a0 gh-91401: Add a failsafe way to disable vfork. gpshead Apr 12, 2022 https://github.com/python/cpython/pull/91490/commits/aba06a0fb2b9b1c054addc66d3dd2acf5c413e8e
c99fb75 Switch the attr name to _USE_VFORK for consistency gpshead Apr 25, 2022 https://github.com/python/cpython/pull/91490/commits/c99fb75786c41ef36bf4e5606474730b0c92e036
b794394 Add a comment, default to True. gpshead Apr 25, 2022 https://github.com/python/cpython/pull/91490/commits/b794394eea984f0cb5ecff9cf83198dc5f43c123
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9272669 Add a unittest for _USE_VFORK. gpshead Apr 25, 2022 https://github.com/python/cpython/pull/91490/commits/9272669fd31c4bfaa56fc2d1c80599b463ab3820
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