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

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Message-ID: <ZCmLOruMPQDbfTyH@1wt.eu>
Date:   Sun, 2 Apr 2023 16:03:38 +0200
From:   Willy Tarreau <w@....eu>
To:     Thomas Weißschuh <linux@...ssschuh.net>
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 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.


> +		SET_ERRNO(EBADF);
> +		return -1;
> +	}
> +	return ~i;
> +}

OK for the rest of the series.

Thanks!
Willy