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From: | dalanicolai |
Subject: | bug#57854: 29.0.50; Different exit code in Emacs and terminal for identical process |
Date: | Sat, 17 Sep 2022 16:16:42 +0200 |
> From: dalanicolai <dalanicolai@gmail.com>
> Date: Sat, 17 Sep 2022 15:37:08 +0200
> Cc: 57854@debbugs.gnu.org
>
> Indeed, when invoking the command from the shell prompt using /dev/null as input
> (pdftocio ... < /dev/null), then the command does not return an error (i.e. exit code is 0).
>
> So, indeed there is a difference between invoking it from Emacs and invoking it from the
> shell prompt (without the /dev/null input). This might not be considered a bug, but it is not
> trivial to me, that using call-process implies sending the null-device as input.
>
> Is there a way to call a process from elisp, without sending the input?
You could use start-process instead, and then wait for the process to
finish. It would complicate the Lisp program, though.
> Otherwise, I would
> probably change this into a 'documentation bug' report, in the sense that it would be nice
> if this detail was mentioned in the docs (I think it is not currently).
The doc string of call-process already says that:
The program’s input comes from file INFILE (nil means ‘null-device’).
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