linux-kernel - Re: [PATCH v2 2/3] tools/nolibc: implement fd-based FILE streams

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Date:   Sun, 2 Apr 2023 15:07:19 +0000
From:   Thomas Weißschuh <linux@...ssschuh.net>
To:     Willy Tarreau <w@....eu>
Cc:     Shuah Khan <shuah@...nel.org>, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v2 2/3] tools/nolibc: implement fd-based FILE streams

On 2023-04-02 16:03:38+0200, Willy Tarreau wrote:
> On Sun, Apr 02, 2023 at 01:02:46PM +0000, Thomas Weißschuh wrote:
> > Willy:
> > 
> > This uses intptr_t instead of uintptr_t as proposed because uintptr_t
> > can not be negative.
> 
> Ah yes good point.
> 
> > +/* provides the fd from of stream. */
> > +static __attribute__((unused))
> > +int fileno(FILE *stream)
> > +{
> > +	intptr_t i = (intptr_t)stream;
> > +
> > +	if (i > 0) {
> 
> If you don't mind I'll change this to "if (i >= 0)" since we also want
> to set errno on NULL.

Sounds good.

> > +		SET_ERRNO(EBADF);
> > +		return -1;
> > +	}
> > +	return ~i;
> > +}
> 
> OK for the rest of the series.

Thanks,
Thomas