FreeBSD first declared the function in unistd.h in 2000:
https://cgit.freebsd.org/src/commit/include/unistd.h?id=9feac5c21886
No other #include line was needed to use the function, but the man page
unnecessarily instructed users to include sys/types.h until 2022-11-29:
https://cgit.freebsd.org/src/commit/?id=5b6f0a5012e9bc37dcb32b57b41e2443a46da620
libbsd first declared the function in unistd.h in 2010 with commit
3fed78e5b08f78256e533788b4bcd6502b0949d7 and inherited the bug from
FreeBSD's man page.
No need to do anything for backwards compat.
Signed-off-by: Guillem Jover <guillem@hadrons.org>
The former used to be the reference implementation, but it has been
stagnant to the point of not showing much signs of life. Switch to
the currently active and more complete implementation for references.
While using fully uppercase man page titles has been the usual
convention for a very long time, it is rather ugly and something that
some other projects are switching away from.
groff(1) has changed the internal layout for the .Lb doc strings, but to
preserve backwards compatibility we cannot simply rename them, we need
to create new aliases so that these will work with old and new macros.
Signed-off-by: Guillem Jover <guillem@hadrons.org>
We have moved all man pages to section 3bsd, let's do the same for the
page title, and in all the references for uniformity and to avoid
confusions.
Fixes: https://bugs.freedesktop.org/101545
