linux-kernel - Re: [PATCH] kernel/time: Make /proc/timer

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Date:	Thu, 18 Nov 2010 09:28:25 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Marcus Meissner <meissner@...e.de>, rusty@...tcorp.com.au,
	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kernel/time: Make /proc/timer_list mode 0400

Le jeudi 18 novembre 2010 à 09:12 +0100, Ingo Molnar a écrit :

> We should do something like:
> 
> 	if (!capable(CAP_SYS_ADMIN))
> 		print_ptr = NULL;
> 
> 	sprintf(s, "%p", print_ptr);

A while ago, Thomas suggested following idea :

<quote> 

Considering the amount of duplication you are about to do, you may
want to think about adding a new pointer format extension then. We
already have special '%p' modes for IPv6 addresse, MAC addresses and
various other pointer types. It wouldn't be hard to add one which
does not print (null).

</quote>

http://www.spinics.net/lists/netdev/msg146606.html

So the if (!capable(CAP_SYS_ADMIN)) could be centralized in %pX handling
(X being a new letter, not actually 'X')



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