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bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits
From: |
Noam Postavsky |
Subject: |
bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits |
Date: |
Tue, 14 Jun 2016 17:48:22 -0400 |
On Tue, Jun 14, 2016 at 10:35 AM, Eli Zaretskii <eliz@gnu.org> wrote:
> All the above is true, but I don't understand the original complaint.
My understanding of the original complaint is that if you compile the
program below:
#include <stdlib.h>
int main(int argc, char *argv[])
{
return atoi(argv[1]);
}
/*
(call-process (expand-file-name "exit-arg1.exe") nil nil nil "300") ;=> 44
*/
To lisp programs the exit status gets truncated to 8 bits, whereas
running from cmd.exe:
C:\Users\npostavs\src\emacs\bug-6430-w32-exit-rc>exit-arg1.exe 300
C:\Users\npostavs\src\emacs\bug-6430-w32-exit-rc>echo %errorlevel%
300
> Emacs doesn't truncate exit status of subprocesses in any way, it
> retrieves the full value of the status, and then reformats it
> according to what the Posix-style WIF* macros (which Emacs uses
> elsewhere) expect. No information is lost during this reformatting,
> see the implementation of waitpid in w32proc.c.
Not really sure what this reformatting is about, but I think the point
is that the original value does not return to lisp.
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits, Noam Postavsky, 2016/06/13
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits, Óscar Fuentes, 2016/06/14
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits, Eli Zaretskii, 2016/06/14
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits,
Noam Postavsky <=
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits, Eli Zaretskii, 2016/06/14
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits, Óscar Fuentes, 2016/06/15
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits, Eli Zaretskii, 2016/06/15
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits, Óscar Fuentes, 2016/06/15
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits, Eli Zaretskii, 2016/06/15
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits, Óscar Fuentes, 2016/06/15
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits, Eli Zaretskii, 2016/06/15
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits, Óscar Fuentes, 2016/06/15
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits, Eli Zaretskii, 2016/06/15
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits, Óscar Fuentes, 2016/06/15