On 2/28/2023 11:23 AM, Eli Zaretskii wrote:
> How about changing make-frame on master to create a TTY frame in batch
> sessions, even if DISPLAY is set in the environment?

That could work. Just to see what would happen, I tried running the 
Emacs server in a batch session and then calling "emacsclient -c -nw":

   emacs -Q --batch --eval '(progn (server-start) (while t (sit-for 1)))'
   emacsclient -c -nw

Surprisingly, it seems to mostly work, although it echoes control 
characters to the screen.

Anyway, here's a patch for this. Maybe there's a better way to do it, 
but this seemed like the least-invasive.