linux-kernel - Re: [PATCH 3/6] lib80211: re-use string_escape_mem_any

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Date:	Wed, 02 Jul 2014 09:30:11 -0700
From:	Joe Perches <joe@...ches.com>
To:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:	"John W. Linville" <linville@...driver.com>,
	Johannes Berg <johannes@...solutions.net>,
	devel@...verdev.osuosl.org, linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 3/6] lib80211: re-use string_escape_mem_any_np()

On Wed, 2014-07-02 at 17:06 +0300, Andy Shevchenko wrote:
> On Wed, 2014-07-02 at 06:43 -0700, Joe Perches wrote:
> > On Wed, 2014-07-02 at 16:20 +0300, Andy Shevchenko wrote:
> > > In kernel we have function to escape a given string. Let's use it instead of
> > > custom approach.
> > > 
> > > This fixes a bug. The current implementation wrongly prints octal numbers: only
> > > two first digits are used in case when 3 are required and the rest of the
> > > string ends up cut off.
> 
> []
> 
> > This code looks like it was adapted from the old print_mac
> > ethernet code that was eventually replaced by a vsprintf
> > pointer extension %pM
> > 
> > So a better way to do this might be to add and use yet
> > another vsprintf %p<foo> extension for ssids.
> 
> Might be, but it
>  - doesn't reduce necessity of string_escape_mem (not only ssid are
> escaped in kernel)
>  - prevents user to choose a rule what exactly their would like to
> escape (look at the other patches against ssid escaping)
> 

%pE<FLAGS> would allow the same arbitrary combinations
of your flags.


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