Can we reset CSI u mode on client disconnect? via

[David Leadbeater]

On Mon, 8 Jul 2024 at 12:36, Thorsten Glaser <t.glaser at qvest-digital.com> wrote:
> >manifestation of the problem. As mentioned in the Kitty issue, shells
> >should really gain support for input modes.
>
> Pretty sure that not. That would totally mess up things like
> OS/2 console windows and possibly VT100 (hardware) terminals
> and just look like extra junk spewed before the prompt (also
> throwing off the shell surrounding the ssh client’s calcula‐
> tion of the input line length / cursor position).

Older hardware or software terminals will ignore any escape sequences
they don't recognise, it won't result in any "extra junk" (I'm using
Zsh with the configuration I posted on a VT520 without problem). This
is the openssh list so I wasn't going to go into the details of it,
but roughly the shell would first detect likely support via $TERM or
another method (there are reporting sequences for what key modes are
enabled / supported which for example is how Vim does this) then
enable the mode if needed.

David