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

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Message-ID: <1404384546.5102.71.camel@smile.fi.intel.com>
Date:	Thu, 03 Jul 2014 13:49:06 +0300
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	Joe Perches <joe@...ches.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 09:30 -0700, Joe Perches wrote:
> 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.

Makes sense. 
Can do this as a separate patch.
Though I would have a sane default for escaping SSIDs. I hope that one
from print_ssid() could be the one.

-- 
Andy Shevchenko <andriy.shevchenko@...el.com>
Intel Finland Oy

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