[Bug 266627] stty -f <file> should be non-blocking

From: <bugzilla-noreply_at_freebsd.org>
Date: Mon, 26 Sep 2022 19:33:52 UTC 
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=266627

Konstantin Belousov <kib@FreeBSD.org> changed:

           What    |Removed                     |Added
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                 CC|                            |kib@FreeBSD.org

--- Comment #1 from Konstantin Belousov <kib@FreeBSD.org> ---
What would you expect in this case to happen? TIOCSETA override the job
control rules?  I do not think this is wise.  Or TIOCSETA returning EAGAIN
for instance.  The later may be reasonable, but I am not sure how much code
would break.

Anyway, the later option probably could be done by the attached change.  Do you
know what e.g. Linux does in this case?

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