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doc: posix: update for POSIX_FILE_SYSTEM_R #81475

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doc: posix: update for POSIX_FILE_SYSTEM_R #81475

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doc: posix: option_groups: add section for POSIX_FILE_SYSTEM_R
ycsin Nov 16, 2024
eacdd8f
doc: release-notes-4.0: posix: update for _POSIX_THREAD_SAFE_FUNCTIONS
ycsin Nov 16, 2024
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2 changes: 2 additions & 0 deletions doc/releases/release-notes-4.0.rst
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Expand Up @@ -1367,6 +1367,7 @@ Libraries / Subsystems

* :ref:`POSIX_DEVICE_IO <posix_option_group_device_io>`
* :ref:`POSIX_SIGNALS <posix_option_group_signals>`
* :ref:`POSIX_FILE_SYSTEM_R <posix_option_group_file_system_r>`

* Added support for the following Options:

Expand All @@ -1381,6 +1382,7 @@ Libraries / Subsystems
* :ref:`_POSIX_THREAD_SAFE_FUNCTIONS <posix_option_thread_safe_functions>` improvements:

* Support for :c:func:`asctime_r`, :c:func:`ctime_r`, and :c:func:`localtime_r`.
* Added stub for :c:func:`getpwnam_r`, :c:func:`getpwuid_r`, :c:func:`getgrgid_r` and :c:func:`getgrnam_r`.
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I think this is maybe Ok for a backport PR to v4.0.

However, looking into things a bit deeper, getpwnam_r(), getpwuid_r(), getgrgid_r(), and getgrnam_r() belong to a separate Option Group -
POSIX_SYSTEM_DATABASE_R. And the non-reentrant versions of these belong to the POSIX_SYSTEM_DATABASE Option Group, and _POSIX_THREAD_SAFE_FUNCTIONS is more of an Option / Feature Test Macro.

So really what we need here is a new Kconfig.system_database file with two new Kconfig options (same as the option group names).

_POSIX_THREAD_SAFE_FUNCTIONS should probably be a hidden Kconfig option that depends on other Kconfig values being enabled. Namely, CONFIG_POSIX_SYSTEM_DATABASE_R, CONFIG_POSIX_C_LANG_SUPPORT_R, CONFIG_POSIX_FILE_LOCKING, CONFIG_POSIX_FILE_SYSTEM_R.

And then of course modify the docs

https://pubs.opengroup.org/onlinepubs/9799919799/xrat/V4_subprofiles.html

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All of the above should be in a separate PR.


* :ref:`POSIX_THREADS_BASE <posix_option_group_threads_base>` improvements:

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13 changes: 13 additions & 0 deletions doc/services/portability/posix/option_groups/index.rst
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Expand Up @@ -258,6 +258,19 @@ Enable this option group with :kconfig:option:`CONFIG_POSIX_FILE_SYSTEM`.
unlink(), yes
utime(),

.. _posix_option_group_file_system_r:

POSIX_FILE_SYSTEM_R
+++++++++++++++++++

Enable this option with :kconfig:option:`CONFIG_POSIX_FILE_SYSTEM_R`.

.. csv-table:: POSIX_FILE_SYSTEM_R
:header: API, Supported
:widths: 50,10

readdir_r(), yes

.. _posix_option_group_mapped_files:

POSIX_MAPPED_FILES
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