linux-kernel - Re: [PATCH] kconfig: display an error message when aborting

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Date:	Thu, 26 Nov 2009 12:15:23 +0100
From:	Michal Marek <mmarek@...e.cz>
To:	Mike Frysinger <vapier@...too.org>
Cc:	linux-kbuild@...r.kernel.org, Sam Ravnborg <sam@...nborg.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kconfig: display an error message when aborting

On 25.11.2009 05:48, Mike Frysinger wrote:
> If the Kconfig option causes an open() failure (like one that starts with
> an underscore), there should be an error message shown since we're going
> to be exiting with an error code.  Otherwise, the reason for the failure
> can really only be diagnosed with strace or something similar.
> 
> Signed-off-by: Mike Frysinger <vapier@...too.org>
> ---
>  scripts/kconfig/confdata.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
> index b55e72f..e2644b4 100644
> --- a/scripts/kconfig/confdata.c
> +++ b/scripts/kconfig/confdata.c
> @@ -640,6 +640,8 @@ static int conf_split_config(void)
>  		fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
>  		if (fd == -1) {
>  			if (errno != ENOENT) {
> +				conf_warning("sym '%s' with path '%s': %s",
> +					     sym->name, path, strerror(errno));
>  				res = 1;
>  				break;
>  			}

I agree that there definitely needs to be some error reporting (and not
only here but in many more places, look e.g. at conf_write() or
conf_write_autoconf()), but why use conf_warning() for this? It will
prefix the error message with "include/config/auto.conf:<last lineno>",
which has nothing to do with the path that could not be opened.

Michal
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