From: Eli Zaretskii <eliz@gnu.org>
To: "Óscar Fuentes" <ofv@wanadoo.es>
Cc: macross84@ozu.es, 6430@debbugs.gnu.org, npostavs@users.sourceforge.net
Subject: bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits
Date: Wed, 15 Jun 2016 18:02:27 +0300 [thread overview]
Message-ID: <8337oeebr0.fsf@gnu.org> (raw)
In-Reply-To: <87mvmmk52b.fsf@wanadoo.es> (message from Óscar Fuentes on Wed, 15 Jun 2016 14:30:20 +0200)
> From: Óscar Fuentes <ofv@wanadoo.es>
> Cc: Noam Postavsky <npostavs@users.sourceforge.net>, macross84@ozu.es, 6430@debbugs.gnu.org
> Date: Wed, 15 Jun 2016 14:30:20 +0200
>
> Eli Zaretskii <eliz@gnu.org> writes:
>
> >> Not really sure what this reformatting is about, but I think the point
> >> is that the original value does not return to lisp.
> >
> > Why is that a problem?
>
> Because Emacs is reporting something false?
Only if the value is greater than 255.
> > The important information that I thought this was about is in the
> > upper 4 bits of the status, and it doesn't get lost -- it's passed
> > back to Emacs as the signal (if any) that caused the subprocess to
> > exit.
> >
> > If there are any important use cases with programs that return status
> > above 255, we can easily change the definition of WEXITSTATUS for
> > Windows. But I have yet to see a real-life example of such a program,
> > or any complaint about the current WEXITSTATUS definition in Emacs.
>
> You are fortunate enough to live in a world of applications ported from
> *nix :-) (and so do I, for the most part.)
Emacs does more than that. To see that, interrupt a console program
with Ctrl-C, and then display its exit status using %ERRORLEVEL%.
Then do the same inside Emacs and compare the results. That's what I
thought the OP was alluding to.
> When a Windows application calls an API that fails and the application
> has no method for recovering from the error, it is customary to exit
> with the error code of the API (usually obtained with GetLastError).
GetLastError has nothing to do with this, because it's not an API that
fails, it's a program that exits with some arbitrary exit code.
next prev parent reply other threads:[~2016-06-15 15:02 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-15 17:20 bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits macross84
2016-06-14 2:48 ` Noam Postavsky
2016-06-14 13:07 ` Óscar Fuentes
2016-06-14 14:35 ` Eli Zaretskii
2016-06-14 21:48 ` Noam Postavsky
2016-06-15 2:39 ` Eli Zaretskii
2016-06-15 12:30 ` Óscar Fuentes
2016-06-15 15:02 ` Eli Zaretskii [this message]
2016-06-15 15:15 ` Óscar Fuentes
2016-06-15 15:40 ` Eli Zaretskii
2016-06-15 17:14 ` Óscar Fuentes
2016-06-15 17:32 ` Eli Zaretskii
2016-06-15 17:36 ` Óscar Fuentes
2016-06-15 18:04 ` Eli Zaretskii
2016-06-15 18:22 ` Óscar Fuentes
2016-06-15 18:50 ` Eli Zaretskii
2016-06-15 19:32 ` Óscar Fuentes
2016-06-16 2:35 ` Eli Zaretskii
2016-06-16 4:13 ` Óscar Fuentes
2016-06-16 15:07 ` Eli Zaretskii
2016-06-16 17:56 ` Óscar Fuentes
2016-06-16 19:05 ` Eli Zaretskii
2020-11-19 4:05 ` Stefan Kangas
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=8337oeebr0.fsf@gnu.org \
--to=eliz@gnu.org \
--cc=6430@debbugs.gnu.org \
--cc=macross84@ozu.es \
--cc=npostavs@users.sourceforge.net \
--cc=ofv@wanadoo.es \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.