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Issue #10433: Document unique behavior of 'os.getgroups' on Mac OS X.

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Ned Deily 2012-04-30 11:14:02 -07:00
parent 3d6d7a5e15
commit 2e20968feb
1 changed files with 18 additions and 0 deletions
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Doc/library/os.rst
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@ -227,6 +227,20 @@ process and user.
Availability: Unix.
.. note:: On Mac OS X, :func:`getgroups` behavior differs somewhat from
other Unix platforms. If the Python interpreter was built with a
deployment target of :const:`10.5` or earlier, :func:`getgroups` returns
the list of effective group ids associated with the current user process;
this list is limited to a system-defined number of entries, typically 16,
and may be modified by calls to :func:`setgroups` if suitably privileged.
If built with a deployment target greater than :const:`10.5`,
:func:`getgroups` returns the current group access list for the user
associated with the effective user id of the process; the group access
list may change over the lifetime of the process, it is not affected by
calls to :func:`setgroups`, and its length is not limited to 16. The
deployment target value, :const:`MACOSX_DEPLOYMENT_TARGET`, can be
obtained with :func:`sysconfig.get_config_var`.
.. function:: initgroups(username, gid)
@ -389,6 +403,10 @@ process and user.
Availability: Unix.
.. note:: On Mac OS X, the length of *groups* may not exceed the
system-defined maximum number of effective group ids, typically 16.
See the documentation for :func:`getgroups` for cases where it may not
return the same group list set by calling setgroups().
.. function:: setpgrp()