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I create two virtual serials by

socat -d -d pty,raw,echo=0 pty,raw,echo=0

in the specific case, I got /dev/pts/9 and /dev/pts/16 I then start screen on one side, in one X terminal, specifically gnome-terminal (for what it matters)

 screen /dev/pts/9 9600 vt52

and getty on the other side (from root), in another X terminal (again, gnome-terminal)

getty pts/16 9600 vt52

I then login in the screen terminal. I can ls, etc. However, when I launch emacs (inside screen,thus NOT graphical) I get emacs's output on the getty's terminal, instead of inside screen's terminal. How is that possible? How can I fix that?

I do not know if that's related, but when I login I get

-bash: cannot set terminal process group (64718): Inappropriate ioctl for device
-bash: no job control in this shell
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1 Answer 1

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The answer was provided by Andres Navarro (https://github.com/AndresNavarro82). It is necessary to use setsid, i.e.

sudo setsid getty pts/16 9600 vt52
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