linux-kernel - Re: [PATCH 1/2] remove all uses of printf's %n

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Message-ID: <1379347993.1934.16.camel@joe-AO722>
Date:	Mon, 16 Sep 2013 09:13:13 -0700
From:	Joe Perches <joe@...ches.com>
To:	George Spelvin <linux@...izon.com>
Cc:	keescook@...omium.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, dan.carpenter@...cle.com,
	JBeulich@...e.com, kosaki.motohiro@...il.com,
	penguin-kernel@...ove.sakura.ne.jp, viro@...iv.linux.org.uk
Subject: Re: [PATCH 1/2] remove all uses of printf's %n

On Mon, 2013-09-16 at 12:07 -0400, George Spelvin wrote:
> it gave me an idea.  We could put this padding logic straight
> into vsprintf and clean up all the callers.
[]
> Since the only pad character currently used is space, we could omit the
> argument and use something like %127%, but gcc gets even more confused
> by that.
> 
> The code is easy enough.  But any suggestions for ways to represent it
> in the format string would be appreciated.

%*p<new_type><pad_char> (space assumed if not existing)

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