openssh unix dev - Feb 2018 - Add server support for signal channel (RFC 4254, 6.9)

I would like to see sshd support the signal channel. Issue 1424 [1] has
been tracking this for 10 years, but it's not very clear to me why it never
progressed. Discussion in that issue centers around the ergonomics of
adding support to the client. I am more interested in seeing this work with
other clients that already implement the feature (e.g. Go's SSH package
[2]).

I attached a smaller patch that only makes changes to the server. It is a
subset of the existing attached patch.

Thanks,
Jay

[1]: https://bugzilla.mindrot.org/show_bug.cgi?id=1424#c44
[2]: https://github.com/golang/go/issues/16597

Is there an OpenSSH project maintainer that can speak authoritatively on
this issue? What will it take to add support for section 6.9 of the RFC
(beyond the patch[es] in issue 1424)? Is there a flaw with this part of the
RFC that makes implementation problematic?

Thanks,
Jay

On Thu, Feb 15, 2018 at 2:07 PM Jay Weisskopf <jay at jayschwa.net> wrote:
> I would like to see sshd support the signal channel. Issue 1424 [1] has
> been tracking this for 10 years, but it's not very clear to me why it
never
> progressed. Discussion in that issue centers around the ergonomics of
> adding support to the client. I am more interested in seeing this work with
> other clients that already implement the feature (e.g. Go's SSH package
> [2]).
>
> I attached a smaller patch that only makes changes to the server. It is a
> subset of the existing attached patch.
>
> Thanks,
> Jay
>
> [1]: https://bugzilla.mindrot.org/show_bug.cgi?id=1424#c44
> [2]: https://github.com/golang/go/issues/16597
>