linux-kernel - Re: [PATCH V2 1/2] string: Add stracpy and stracpy

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Date:   Wed, 24 Jul 2019 00:10:58 -0700
From:   Joe Perches <joe@...ches.com>
To:     Rasmus Villemoes <linux@...musvillemoes.dk>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org
Cc:     Jonathan Corbet <corbet@....net>, Stephen Kitt <steve@....org>,
        Kees Cook <keescook@...omium.org>,
        Nitin Gote <nitin.r.gote@...el.com>, jannh@...gle.com,
        kernel-hardening@...ts.openwall.com,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH V2 1/2] string: Add stracpy and stracpy_pad mechanisms

On Wed, 2019-07-24 at 08:53 +0200, Rasmus Villemoes wrote:
> BUILD_BUG_ON(!__same_type())
> strscpy(dst, src, ARRAY_SIZE(dst))

Doing this without the temporary is less legible to read
the compiler error when someone improperly does:

	char *foo;
	char *bar;

	stracpy(foo, bar);