bug#34123: A patch to fix reading EOF characters in non-interactive mode

[Shawn Presser <shawnpresser@gmail.com>]

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It's non-interactive:

arc> |noninteractive|
t

(The expression |noninteractive| in arcmacs is equivalent to evaluating
'noninteractive in emacs lisp.)

The runtimes start by invoking emacs using `emacs -Q --script ...`, so it's
always noninteractive. And in general for writing shell scripts rather than
repls, it's important to be in noninteractive mode. But it's equally
important to have the ability to prompt the user from a shell script, and
for the user to be able to cancel by using ^D without causing stdin errors
on all subsequent prompts.



On Fri, Jan 18, 2019 at 10:04 AM Eli Zaretskii <eliz@gnu.org> wrote:

> > From: Shawn Presser <shawnpresser@gmail.com>
> > Date: Fri, 18 Jan 2019 08:22:31 -0600
> > Cc: 34123@debbugs.gnu.org
> >
> > I use Emacs Lisp as a runtime for Arc (https://github.com/shawwn/arcmacs)
> and for Lumen
> > (https://github.com/shawwn/y). The goal is to be able to run a Lisp
> REPL from the terminal.
>
> So the usage you describe, and are interested in, is not
> non-interactive, as far as Emacs is concerned, right?  Or am I missing
> something?
>

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