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bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits
From: |
Óscar Fuentes |
Subject: |
bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits |
Date: |
Wed, 15 Jun 2016 19:14:25 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.0.92 (gnu/linux) |
Eli Zaretskii <eliz@gnu.org> writes:
>> > 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.
>>
>> if( ! CreateProcess(....) ) {
>> DWORD ec = GetLastError();
>> // do some cleanup
>> ExitProcess(ec);
>> }
>
> That's not how Emacs does that, see waitpid and its callers.
Once again, we are miscommunicating. AFAIU this is about Emacs calling a
process foo which returns an exit code larger than 255, but Emacs only
reports the lower 8 bits to the Elisp function that started the process.
In w32proc.c waitpid:
if (!GetExitCodeProcess (wait_hnd[active], &retval))
...
retval <<= 8;
Windows applications make use of the full 32 bits of the return code.
With Emacs it is impossible to know those larger-than-255 exit codes.
- 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, 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, 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 <=
- 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, 2016/06/16
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits, Eli Zaretskii, 2016/06/16
- bug#6430: Emacs WINDOWS truncates exit status of processes to 8 bits, Óscar Fuentes, 2016/06/16