Re: not good proposal: "C-z <letter>" reserved for users

[Eli Zaretskii]

> Date: Fri, 12 Feb 2021 23:26:26 +0300
> From: Jean Louis <bugs@gnu.support>
> Cc: Gregory Heytings <gregory@heytings.org>,
>  Robert Thorpe <rt@robertthorpeconsulting.com>, help-gnu-emacs@gnu.org
> 
> So Emacs could decide to ignore the shell job control

C-z in Emacs doesn't invoke job control, it invokes an Emacs command
that _emulates_ job control by sending the SIGTSTP signal to the Emacs
process (if the underlying platform supports suspending; otherwise it
invokes a subsidiary shell).  The "real" job control is disabled when
you enter Emacs, by virtue of the keyboard input setup Emacs does at
startup.

So please don't assume C-z is some shell job control magic; it isn't.
This is Emacs emulating that magic, because we decided long ago to do
that.  Arguing that Emacs does it because the underlying shell does it
is therefore counter-productive.