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Re: Compiling in mingw-ucrt runtime
From: |
Bruno Haible |
Subject: |
Re: Compiling in mingw-ucrt runtime |
Date: |
Sun, 25 Feb 2024 16:05:54 +0100 |
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
- Re: Compiling in mingw-ucrt runtime, (continued)
- Re: Compiling in mingw-ucrt runtime, Eli Zaretskii, 2024/02/24
- Re: Compiling in mingw-ucrt runtime, Arthur Miller, 2024/02/25
- Re: Compiling in mingw-ucrt runtime, Po Lu, 2024/02/25
- Re: Compiling in mingw-ucrt runtime, Eli Zaretskii, 2024/02/25
- Re: Compiling in mingw-ucrt runtime, Arthur Miller, 2024/02/25
- Re: Compiling in mingw-ucrt runtime, Eli Zaretskii, 2024/02/25
- Re: Compiling in mingw-ucrt runtime, Arthur Miller, 2024/02/25
- Re: Compiling in mingw-ucrt runtime, Eli Zaretskii, 2024/02/25
- Re: Compiling in mingw-ucrt runtime, Bruno Haible, 2024/02/25
- Re: Compiling in mingw-ucrt runtime, Eli Zaretskii, 2024/02/25
- Re: Compiling in mingw-ucrt runtime,
Bruno Haible <=
- Re: Compiling in mingw-ucrt runtime, Eli Zaretskii, 2024/02/25
- Re: Compiling in mingw-ucrt runtime, Bruno Haible, 2024/02/25
- Re: Compiling in mingw-ucrt runtime, Eli Zaretskii, 2024/02/25
- Re: Compiling in mingw-ucrt runtime, Benjamin Riefenstahl, 2024/02/23