linux-kernel - Re: [PATCH v2 RESEND] sign-file: Fix confusing error messages

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Message-ID: <Yro6MUv6t8wjAHvR@kernel.org>
Date:   Tue, 28 Jun 2022 02:16:01 +0300
From:   Jarkko Sakkinen <jarkko@...nel.org>
To:     Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
Cc:     David Howells <dhowells@...hat.com>,
        David Woodhouse <dwmw2@...radead.org>,
        keyrings@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 RESEND] sign-file: Fix confusing error messages

On Mon, Jun 27, 2022 at 05:21:07PM +0800, Tianjia Zhang wrote:
> When an error occurs, use errx() instead of err() to display the
> error message, because openssl has its own error record. When an
> error occurs, errno will not be changed, while err() displays the
> errno error message. It will cause confusion. For example, when
> CMS_add1_signer() fails, the following message will appear:
> 
>   sign-file: CMS_add1_signer: Success
> 
> errx() ignores errno and does not cause such issue.
> 
> Signed-off-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
> ---
>  scripts/sign-file.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/scripts/sign-file.c b/scripts/sign-file.c
> index 7434e9ea926e..598ef5465f82 100644
> --- a/scripts/sign-file.c
> +++ b/scripts/sign-file.c
> @@ -114,7 +114,7 @@ static void drain_openssl_errors(void)
>  		bool __cond = (cond);			\
>  		display_openssl_errors(__LINE__);	\
>  		if (__cond) {				\
> -			err(1, fmt, ## __VA_ARGS__);	\
> +			errx(1, fmt, ## __VA_ARGS__);	\
>  		}					\
>  	} while(0)
>  
> -- 
> 2.24.3 (Apple Git-128)
> 


Reviewed-by: Jarkko Sakkinen <jarkko@...nel.org>

BR, Jarkko