lib/59138: POSIX.1-2024: _Fork()

[campbell+netbsd%mumble.net@localhost]

>Number:         59138
>Category:       lib
>Synopsis:       POSIX.1-2024: _Fork()
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    lib-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Mar 06 13:25:00 +0000 2025
>Originator:     Taylor R Campbell
>Release:        current, 10, 9, ...
>Organization:
The NetBSD _Forkation
>Environment:
>Description:
POSIX.1-2024 has added a function _Fork() which is like fork() but doesn't run the pthread_atfork handlers:

> The _Fork() function shall be equivalent to fork(), except that fork handlers established by means of the pthread_atfork() function shall not be called and _Fork() shall be async-signal-safe.

https://pubs.opengroup.org/onlinepubs/9799919799/functions/fork.html
>How-To-Repeat:
standards inspection
>Fix:
Yes, please!