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GeezerVison is showing github.com — gh-134587: Fix os.mkdir(mode=0o700) under Windows AppContainer by thatnerdyguy · Pull Request #148804 · python/cpython

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@thatnerdyguy

@thatnerdyguy thatnerdyguy commented Apr 20, 2026 •
edited by bedevere-app Bot
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In gh-118773, which was a follow up to gh-118488, an SDDL was used to grant a directory created via os.mkdir with mode=0o700 owner, admin, and system control. However, when running under a Windows AppContainer, objects must ALSO allow access for the AppContainer SID.

This changes the logic to do a one time resolution of the SDDL string to use. If we are running under an AppContainer, then the SDDL includes the SID of the AppContainer, otherwise we use the same standard SDDL as before.

  • Issue: mkdtemp() created directories no longer allows for writing files when running under a Windows AppContainer in 3.12.4 (but works under 3.12.3) #134587

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@ccrooks-aegis @thatnerdyguy
pythongh-134587: Fix os.mkdir(mode=0o700) in Windows AppContainer
ee29182 
In 8af84b5 (pythongh-118773), which was a follow up to 81939da (pythongh-118488), an SDDL was used to grant
a directory created via os.mkdir with mode=0o700 owner, admin, and system control. However,
when running under a Windows AppContainer, objects must ALSO allow access for the AppContainer
SID.

This changes the logic to do a one time resolution of the SDDL string to use. If we are running
under an AppContainer, then the SDDL includes the SID of the AppContainer, otherwise we use the
same standard SDDL as before.
@bedevere-app bedevere-app Bot added the awaiting review label Apr 20, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Apr 20, 2026
mkdtemp() created directories no longer allows for writing files when running under a Windows AppContainer in 3.12.4 (but works under 3.12.3) #134587
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@thatnerdyguy
Add missing newline
8d256c9
@python-cla-bot

python-cla-bot Bot commented Apr 20, 2026 •
edited
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thatnerdyguy added 2 commits April 20, 2026 15:14
@thatnerdyguy
Remove backquotes
277ebc1
@thatnerdyguy
Fix trailing spaces
e31766a
@github-actions

github-actions Bot commented Jul 25, 2026

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This PR is stale because it has been open for 90 days with no activity.
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@github-actions github-actions Bot added the stale Stale PR or inactive for long period of time. label Jul 25, 2026
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@thatnerdyguy @ccrooks-aegis
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