bug#42059: 26.3; OpenBSD now has posix_openpt(3)

["Mattias Engdegård" <mattiase@acm.org>]

30 juni 2020 kl. 15.49 skrev YASUOKA Masahiko <yasuoka@yasuoka.net>:

> Although old versions might become not able to build Emacs with the
> patch, I suggest Emacs should have the patch.
> 
> Firstly the versions are too old.  posix_openpt(3) had been introduced
> to OpenBSD at OpenBSD 5.3, it was 7 years ago and 14 versions before
> the latest.  It was 6 years ago when the last version which doesn't
> have posix_openpt(3) became out of support.
> 
> Secondly the old way the old versions is using has another problem. It
> caused an error when emacs opens some ptys.  To solve this problem, in
> any case, people need to use newer OpenBSD and newer Emacs.

Thank you for the detailed explanation, and I think applying your patch will be all right -- 7 years is a long time in the security-conscious OpenBSD world. It would probably need an update to the NEWS file, though.

Eli, do you have any objection to the patch by Yasuoka-san, assuming that it limits the OpenBSD support to version 5.3 or newer?
Presumably the patch would be for Emacs 28, unless there are strong security/reliability reasons for Emacs 27.