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From: Rusty Russell <rusty@rustcorp.com.au>
To: Alexander Viro <viro@math.psu.edu>
Cc: linux-kernel@vger.kernel.org, Linus Torvalds <torvalds@transmeta.com>
Subject: Re: more fun with procfs (netfilter) 
In-Reply-To: Your message of "Mon, 19 Nov 2001 02:13:20 CDT."
             <Pine.GSO.4.21.0111190156140.17210-100000@weyl.math.psu.edu> 
Date: Tue, 20 Nov 2001 11:48:56 +1100
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In message <Pine.GSO.4.21.0111190156140.17210-100000@weyl.math.psu.edu> you wri
te:
> Reason: netfilter procfs files try to fit entire records into the user
> buffer.  Do a read shorter than record size and you've got zero.  And
> read() returning 0 means you-know-what...

Yes.  Don't do this.

Hope that helps,
Rusty.
--
Premature optmztion is rt of all evl. --DK