Re: [PATCH v3 0/1] MR10199: msvcrt: Fix no buffering detection in _fwrite_nolock().

[Piotr Caban (＠piotr)]

On Fri Feb 27 16:58:50 2026 +0000, Paul Gofman wrote:
> Like this:
> ```
>     int written = 0, bufsize = 1;
>     if (size == 0)
>         return 0;
>     if ((file->_flag & (MSVCRT__NOBUF | _IOMYBUF | MSVCRT__USERBUF)) || msvcrt_alloc_buffer(file))
>         bufsize = file->_bufsiz;
> ```
> Yes, in theory it can affect applications that set file-\>\_bufsiz themself (but only for stdout or stderr case, otherwise msvcrt_alloc_buffer would have overwritten it). Taking that into account I think the risk is small. Anyway, above code looks good for me.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/10199#note_130746