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gpshead merged 2 commits into from
Apr 5, 2026
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gh-94632: document the subprocess need for extra_groups=() with user= #148129

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gh-94632: document the subprocess need for extra_groups=() with user=
gpshead Apr 5, 2026
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Merge branch 'main' into gh-94632-docs-subprocess-user-groups
gpshead Apr 5, 2026
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gh-94632: document the subprocess need for extra_groups=() with user=
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@gpshead
gpshead committed Apr 5, 2026
commit 8966d851bef4a0406bd55835f3bf5cd6ba0a6aec
6 changes: 6 additions & 0 deletions Doc/library/subprocess.rst
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Expand Up @@ -627,6 +627,12 @@ functions.
the value in ``pw_uid`` will be used. If the value is an integer, it will
be passed verbatim. (POSIX only)

.. note::

Specifying *user* will not drop existing supplementary group memberships!
The caller must also pass ``extra_groups=()`` to reduce the group membership
of the child process for security purposes.

.. availability:: POSIX
.. versionadded:: 3.9

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