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

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Date:   Sun, 26 Jun 2022 09:14:57 +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>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Biggers <ebiggers@...gle.com>,
        Eric Biggers <ebiggers@...nel.org>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Vitaly Chikunov <vt@...linux.org>,
        Gilad Ben-Yossef <gilad@...yossef.com>,
        Pascal van Leeuwen <pvanleeuwen@...bus.com>,
        James Morris <jmorris@...ei.org>,
        James Morris <jamorris@...ux.microsoft.com>,
        keyrings@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] sign-file: Fix confusing error messages

On Fri, Jun 17, 2022 at 05:24:55PM +0800, Tianjia Zhang wrote:
> Hi Jarkko,
> 
> On 6/24/21 6:48 PM, 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 fbd34b8e8f57..37d8760cb0d1 100644
> > --- a/scripts/sign-file.c
> > +++ b/scripts/sign-file.c
> > @@ -107,7 +107,7 @@ 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)
> 
> Likewise, No response from David, can you pick this? thanks.
> 
> Best regards,
> Tianjia

Ditto.

BR, Jarkko