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From: Sam Ravnborg <sam@ravnborg.org>
To: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH 2/3] crypto: digest: Return -errno if lseek() fails
Date: Thu, 17 Jan 2019 06:56:16 +0100	[thread overview]
Message-ID: <20190117055616.GB28203@ravnborg.org> (raw)
In-Reply-To: <20190117044506.20628-2-andrew.smirnov@gmail.com>

On Wed, Jan 16, 2019 at 08:45:05PM -0800, Andrey Smirnov wrote:
> Strictly speaking, lseek() doesn't return a detailed error code as its
> return value and it can and should be obtained via 'errno'. In this
> case this change also allows us to avoid potential problems from
> downconverting 'loff_t' to 'int'.
> 
> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
> ---
>  crypto/digest.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/crypto/digest.c b/crypto/digest.c
> index 493e56902..230db26e8 100644
> --- a/crypto/digest.c
> +++ b/crypto/digest.c
> @@ -226,9 +226,9 @@ static int digest_update_from_fd(struct digest *d, int fd,
>  	unsigned char *buf = xmalloc(PAGE_SIZE);
>  	int ret = 0;
>  
> -	ret = lseek(fd, start, SEEK_SET);
> -	if (ret == -1) {
> +	if (lseek(fd, start, SEEK_SET) != start) {
>  		perror("lseek");
> +		ret = -errno;
>  		goto out_free;
>  	}
Looks fine,
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>


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  reply	other threads:[~2019-01-17  5:56 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-17  4:45 [PATCH 1/3] crypto: digest: Return -errno if open() fails Andrey Smirnov
2019-01-17  4:45 ` [PATCH 2/3] crypto: digest: Return -errno if lseek() fails Andrey Smirnov
2019-01-17  5:56   ` Sam Ravnborg [this message]
2019-01-17  4:45 ` [PATCH 3/3] crypto: digest: Return -errno if stat() fails Andrey Smirnov
2019-01-17  5:56   ` Sam Ravnborg
2019-01-17  5:55 ` [PATCH 1/3] crypto: digest: Return -errno if open() fails Sam Ravnborg
2019-01-17  8:42 ` Sascha Hauer

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