src/lib/libc, branch main

sysctl.3: Correct kern and kern.proc type descriptions

2026-04-16T06:05:20+00:00

Fix several incorrect sysctl.3 type and mutability descriptions so the
manpage matches the actual kern and kern.proc interfaces.

Signed-off-by: Tyler Waddell 
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/2128

libc: fix memfd_create's HUGETLB handling

2026-04-09T02:37:11+00:00

The 'simplification' commit referenced below actually broke one aspect
of MFD_HUGETLB: the caller isn't supposed to be required to specify a
size.  MFD_HUGETLB by itself without a shift mask just requests a large
page, so we revert that part of memfd_create() back.

While we're here, fix up the related parts of the manpages a little bit,
since MFD_HUGETLB is actually supported.  The manpage claims that we
would return ENOSYS if forced mappings weren't supported, but this was
actually not true.  However, that seems like a very important
distinction to make between ENOSYS and EOPNOTSUPP, so fix the
implementation to match the docs.

Fixes:	8b8cf4ece660f ("memfd_create: simplify HUGETLB support [...]")
Reviewed by:	kib, markj
Differential Revision:	https://reviews.freebsd.org/D56114

libc/tests/string: add a more comprehensive unit test for strrchr()

2026-04-08T13:21:50+00:00

The unit tests are patterned after those for memrchr().
This catches the issue found in 293915.

PR:		293915
Reviewed by:	strajabot
Reported by:	safonov.paul@gmail.com
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D56037

libc: Add missing MLINK for stravis(3)

2026-04-07T11:04:49+00:00

MFC after:	1 week
Fixes:		8dfeba04eb36 ("Update to a June 8th snapshot of (un)vis form NetBSD.")
Reviewed by:	ziaee
Differential Revision:	https://reviews.freebsd.org/D56260

pause.3: Fix a typo in the manual page

2026-04-04T07:11:10+00:00

- s/reimplemeted/reimplemented/

MFC after:	3 days

posix_spawn_file_action_addopen.3: ignoring close failure is now approved

2026-04-03T08:22:53+00:00

Reviewed by:	dim
Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
Differential revision:	https://reviews.freebsd.org/D56222

posix_spawn: actions chdir and fchdir are now required by POSIX

2026-04-03T08:22:53+00:00

Drop the _np suffix.

Reviewed by:	dim
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D56222

posix_spawn.3: fix formatting of xref

2026-04-02T07:42:16+00:00

Sponsored by:	The FreeBSD Foundation
MFC after:	3 days

rtld: allow dlopen("#/")

2026-04-02T02:41:55+00:00

When a specially formatted path is passed to dlopen(), of the form
  #number/path
and the number is the valid dirfd file descriptor listed in the
LD_LIBRARY_FDS, interpret it as a relative path name against dirfd
number.

This complements the result returned from dladdr() for such objects
in dli_fname.

Reviewed by:	markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D56152

_exit.2: Cross-reference atexit(3)

2026-03-31T17:13:02+00:00

atexit(3) is one of the cases when _exit(2) must be used instead of
exit(3).

MFC after:		3 days
Reviewed by:		mhorne, ziaee
Differential Revision:	https://reviews.freebsd.org/D54467