Re: interactive shell detection in shrc

On Mon, 30 Sep 2024, [email protected] wrote:

> But, if I'm not mistaken, the discussion was about testing if a shell
> is interactive, that is, "inheriting" whatever has been set and
> testing it. Since SHELL is not set by all login programs (your
> example of xterm) and since the variable, if redefined or undefined,
> is not set automatically by all shells, it can not be used neitherto
> identify the shell and nor to use reliably to verify that it is
> an interactive session.
>

If you're talking about checking for "interactivity" in arbitrary shells
running under arbitrary programs, then I have no clue, Thierry :).

But, for POSIX (Bourne) shells, they should set `i' in `$-'.  Not sure why
one would additionally want to examine $SHELL here. (I've not read all the
emails in this thread, so may have missed that part.)

-RVP