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posix-users/process_creation_and_execution.rst: Update pthread_atfork()

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Updates #4713.
This commit is contained in:
Joel Sherrill 2022-09-06 17:31:18 -05:00
parent 4f9e9e522f
commit 8741d2c234
1 changed files with 11 additions and 5 deletions
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posix-users/process_creation_and_execution.rst
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@ -313,16 +313,22 @@ pthread_atfork - Register Fork Handlers
.. list-table::
:class: rtems-table
* - ``ENOSYS``
- This routine is not supported by RTEMS.
* - ``0``
- This routine is a non-functional stub.
**DESCRIPTION:**
This routine is not supported by RTEMS.
This routine is non-functional stub.
**NOTES:**
NONE
The POSIX specification for ``pthread_atfork()`` does not address the behavior
when in a single process environment. Originally, the RTEMS implementation
returned -1 and set errno to ``ENOSYS``. This was an arbitrary decision
part with no basis from the wider POSIX community. The FACE Technical
Standard includes profiles without multiple process support and defined
the behavior in a single process environment to return 0. Logically, the
application can register atfork handlers but they will never be invoked.
.. _wait:
@ -344,7 +350,7 @@ wait - Wait for Process Termination
**STATUS CODES:**
.. list-table::
:class: rtems-table
* - ``ENOSYS``
- This routine is not supported by RTEMS.