linux-kernel - Re: [PATCH] Smackv10: Smack rules grammar + their stateful parser

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Message-ID: <20071107004350.GS26163@stusta.de>
Date:	Wed, 7 Nov 2007 01:43:50 +0100
From:	Adrian Bunk <bunk@...nel.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	"Ahmed S. Darwish" <darwish.07@...il.com>,
	Pavel Machek <pavel@....cz>,
	Casey Schaufler <casey@...aufler-ca.com>,
	akpm@...ux-foundation.org, linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org, Al Viro <viro@....linux.org.uk>
Subject: Re: [PATCH] Smackv10: Smack rules grammar + their stateful parser

On Tue, Nov 06, 2007 at 04:27:19PM -0800, Linus Torvalds wrote:
> 
> 
> On Wed, 7 Nov 2007, Adrian Bunk wrote:
> > 
> > But if you want to match "one character" (like TOMOYO does) or want to 
> > check for printable characters except space (like Smack does) you must 
> > know whether the byte string 0xC3 0xA0 is the character à or a sequence 
> > of two characters with the second one being NBSP.
> 
> No you don't. You just check the binary value, and decide that ' ', '\t' 
> and '\n' are special.
> 
> Don't go get excited.

How should TOMOYO implement it's "match one character" in a pattern
(used to allow or deny access in a name-based MAC)?

> 		Linus

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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