From: Bruno Haible <bruno@clisp.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: arthur.miller@live.com, emacs-devel@gnu.org
Subject: Re: Compiling in mingw-ucrt runtime
Date: Sun, 25 Feb 2024 16:05:54 +0100 [thread overview]
Message-ID: <6153309.usfYGdeWWP@nimes> (raw)
In-Reply-To: <86ttlwwrbd.fsf@gnu.org>
Eli Zaretskii wrote:
> > On native Windows, the value of errno, after fclose() fails, is undefined.
> > See here in the Gnulib documentation:
> > https://www.gnu.org/software/gnulib/manual/html_node/fclose.html
> >
> > and here in the Microsoft documentation:
> > https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/fclose-fcloseall
> > (it sets errno only if the argument was a NULL pointer).
>
> Strange that they claim that, because their sources tell a different
> story, both for MSVCRT and for UCRT. Or maybe your interpretation of
> what they say there is inaccurate?
Re MSVCRT: My reading of Vc7/crt/src/fclose.c is that it never sets errno.
Re UCRT: My reading of ucrt-10.0.10240.0/stdio/fclose.cpp
and 10.0.14393.0/ucrt/stdio/fclose.cpp
is that errno gets set to EINVAL if the stream argument is invalid,
and remains unchanged otherwise.
This is consistent with the two documentation pages that I cited.
Bruno
next prev parent reply other threads:[~2024-02-25 15:05 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-22 0:01 Compiling in mingw-ucrt runtime Arthur Miller
2024-02-22 6:24 ` Po Lu via Emacs development discussions.
2024-02-22 7:14 ` Eli Zaretskii
2024-02-23 7:58 ` Arthur Miller
2024-02-23 8:24 ` Eli Zaretskii
2024-02-23 11:32 ` Arthur Miller
2024-02-23 12:02 ` Eli Zaretskii
2024-02-24 9:13 ` Arthur Miller
2024-02-24 10:24 ` Eli Zaretskii
2024-02-24 23:11 ` Arthur Miller
2024-02-25 5:56 ` Po Lu
2024-02-25 6:33 ` Eli Zaretskii
2024-02-25 10:19 ` Arthur Miller
2024-02-25 10:48 ` Eli Zaretskii
2024-02-25 11:40 ` Arthur Miller
2024-02-25 12:15 ` Eli Zaretskii
2024-02-25 14:11 ` Bruno Haible
2024-02-25 14:29 ` Eli Zaretskii
2024-02-25 15:05 ` Bruno Haible [this message]
2024-02-25 15:14 ` Eli Zaretskii
2024-02-25 15:32 ` Bruno Haible
2024-02-25 16:02 ` Eli Zaretskii
2024-04-02 15:30 ` Arthur Miller
2024-04-02 16:28 ` Eli Zaretskii
2024-04-03 13:09 ` Arthur Miller
2024-02-23 14:47 ` Benjamin Riefenstahl
2024-02-23 15:03 ` Benjamin Riefenstahl
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