Re: [PATCH v2] wrapper: NetBSD gives EFTYPE and FreeBSD gives EMFILE where POSIX uses ELOOP

From: Collin Funk <collin.funk1@gmail.com>
Date: May 3, 2025, 18:44 UTC
Message-ID: <87tt61mt4q.fsf@gmail.com>
In-Reply-To: <aBY6BPnuSfslYlYt@tapette.crustytoothpaste.net>

"brian m. carlson" <sandals@crustytoothpaste.net> writes:

Show 6 quoted lines

> I'll just add one resource for people who might like to look into these
> kinds of things more.  https://man.freebsd.org/cgi/man.cgi is the
> FreeBSD man page viewer, which lets you view manual pages from the BSDs,
> Linux, and some proprietary Unix systems.  It can be quite helpful for
> finding and fixing portability issues like this or just seeing what
> command-line options or arguments a certain Unix supports.

Gnulib documents most portability quirks too [1]. For example, it had the FreeBSD EMLINK and NetBSD EFTYPE with 'open("symlink", O_NOFOLLOW ...) documented, but for some very old versions released around 2014. Now that I have confirmed it still exists from this git test I have updated the documentation there [2].

Thanks, Collin

[1] https://www.gnu.org/software/gnulib/manual/ [2] https://git.savannah.gnu.org/gitweb/?p=gnulib.git;a=commit;h=c0c646e29fbda0a6eadd6012d8ed1eb33b6c3968