linux-kernel - Re: [PATCH] lib: vsprintf: add printf format conversion %M for errno strings

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Message-ID: <71909969-b6be-d116-3372-7add409c1ec1@gr13.net>
Date:   Sun, 25 Jun 2017 23:18:49 +0200
From:   "Enrico Weigelt, metux IT consult" <enrico.weigelt@...3.net>
To:     Joe Perches <joe@...ches.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] lib: vsprintf: add printf format conversion %M for errno
 strings

On 25.06.2017 22:10, Joe Perches wrote:

>> Yeah, that's still an open problem. Actually, I still haven't found out,
>> how it's done w/ all the other kernel-internal conversions.
> 
> Everything else uses "%p<foo>", <object reference>

hmm, but errno's aren't pointers. Isn't %p checked for pointer values ?
>> Already was about to do so. Shall I call it strerror() ?
> 
> I presume kstrerror
> 
> So use something like
> 	"%d: (%s)", errno, kstrerror(errno)

Okay, sounds good.

--mtx