[TUHS] Other Bell Labs shells from the 80s?

[Rob Pike via TUHS]

Yes, rc shares that property at least to some extent.

Try
% whatis cd
to see what I mean.

-rob

On Tue, Mar 3, 2026 at 10:14 AM Noel Hunt via TUHS <tuhs at tuhs.org> wrote:
>
> On Tue, 3 Mar 2026 at 09:33, George Michaelson via TUHS <tuhs at tuhs.org>
> wrote:
>
> > That "output is valid input" thing totally was what I wanted, I played with
> > making PS1 and PS2 elements which did not prevent cut-paste making valid
> > commands and it never quite worked for me. Not the same, but related.
> >
>
> That's why 'rc' and 'es' use ';' and ';;', respectively, as prompts.