Message-ID: <406799F3.1020508@opersys.com>
Date: Sun, 28 Mar 2004 22:37:23 -0500
From: Karim Yaghmour <karim@opersys.com>
Reply-To: karim@opersys.com
Organization: Opersys inc.
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To: lml@beonline.com.au
CC: linux-kernel@vger.kernel.org
Subject: Re: Kernel / Userspace Data Transfer
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lml@beonline.com.au wrote:
> I have a set of counters in a Kernel module that i want to export to a
> userspace application. I originally decided to use a /proc entry and parse
> the output whenever the userspace application needed this data, however,
> i need more than the 4096 that is allowed in /proc and i'm not too keen
> on parsing large chunks of text anyway.
> 
> What i would like to do is copy these slabs of text from the kernel to my
> userspace application (whenever the application requests it). I've seen the
> 'copy_to_user' function and it looks usefull, but have no idea where to start
> or how to use it :-/
> 
> Can someone provide and example or point me in the right direction? Or is there
> a better place to ask this question?

relayfs has been designed with this type of requirements in mind:
http://www.opersys.com/relayfs/index.html

Karim
-- 
Author, Speaker, Developer, Consultant
Pushing Embedded and Real-Time Linux Systems Beyond the Limits
http://www.opersys.com || karim@opersys.com || 1-866-677-4546

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