Re: N3322 functionality tests
Bruno Haible via Gnulib discussion list <[email protected]>
| Newsgroups | gmane.comp.lib.gnulib.bugs |
|---|---|
| Message-ID | <3453908.daG60p0z9X@cagnes> |
Lasse Collin wrote: > By the way, it seems the check in m4/wcsncat.m4 fails on multiple > platforms due to the same issue that is described in m4/strncat.m4 on > Solaris where strncat can dereference n+1 bytes. See the second > while-loop condition in OpenBSD's wcsncat[2]. ... > In FreeBSD it was fixed in 2016.[4] > > [2] https://cvsweb.openbsd.org/checkout/src/lib/libc/string/wcsncat.c,v?rev=1.4 > [4] https://github.com/freebsd/freebsd-src/commit/cd3dbc2573cd943a968260679a48ffca39080ceb You may gain some kudos by Theo de Raadt by reporting this to the OpenBSD people... > So even if one didn't > care about the N3322 behavior at all, the N3322 check in m4/wcsncat.m4 > is still useful. Good to know. Let's document it. 2026-08-16 Bruno Haible <[email protected]> doc: Mention a wcsncat bug. Reported by Lasse Collin in <https://lists.gnu.org/archive/html/bug-gnulib/2026-08/msg00213.html>. * doc/posix-functions/wcsncat.texi: Mention a wcsncat bug. diff --git a/doc/posix-functions/wcsncat.texi b/doc/posix-functions/wcsncat.texi index 28cbe049f4..389fcb2c83 100644 --- a/doc/posix-functions/wcsncat.texi +++ b/doc/posix-functions/wcsncat.texi @@ -10,6 +10,9 @@ Portability problems fixed by Gnulib: @itemize @item +This function dereferences too much memory on some platforms: +NetBSD 10.0, OpenBSD 7.6. +@item This function does not support zero-length operations on NULL pointers on some platforms: macOS 15, NetBSD 10.0, OpenBSD 7.6, Solaris 11.4, Cygwin 3.5.4.