linux-kernel - Re: gcc fixed size char array initialization bug

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Message-Id: <1186126375.3677.1.camel@gimli.at.home>
Date:	Fri, 03 Aug 2007 09:32:55 +0200
From:	Bernd Petrovitsch <bernd@...mix.at>
To:	WANG Cong <xiyou.wangcong@...il.com>
Cc:	Satyam Sharma <satyam@...radead.org>,
	Jan Engelhardt <jengelh@...putergmbh.de>,
	Guennadi Liakhovetski <g.liakhovetski@....de>,
	linux-kernel@...r.kernel.org
Subject: Re: gcc fixed size char array initialization bug - known?

On Fri, 2007-08-03 at 11:40 +0800, WANG Cong wrote:
> On Fri, Aug 03, 2007 at 08:47:56AM +0530, Satyam Sharma wrote:
[....]
> >While we're talking of null-termination of strings, then I bet you
> >generally want to be using strlcpy(), really. Often strncpy() isn't
> >what you want. Of course, if that buffer isn't a string at all, then
> >you should be using memfoo() functions and not strbar() ones in the
> >first place ...
> 
> Afaik, strlcpy() and strlcat() are NOT standard C library functions.

Yes, because they are not old enough as they are results of lessons
learned with strncpy() and strcpy() and other buffer overflows.

> But, I know, they are available in Linux kernel. ;) And yes, they
> are better than strn{cpy,cat}().

	Bernd
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