linux-kernel - Re: [PATCHSET 4/4] sysfs: implement new features

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Message-Id: <9632E683-2521-49F3-8EB6-64D406862831@mac.com>
Date:	Thu, 27 Sep 2007 18:38:59 -0400
From:	Kyle Moffett <mrmacman_g4@....com>
To:	Greg KH <greg@...ah.com>
Cc:	Tejun Heo <htejun@...il.com>, ebiederm@...ssion.com,
	cornelia.huck@...ibm.com, stern@...land.harvard.edu,
	kay.sievers@...y.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHSET 4/4] sysfs: implement new features

On Sep 25, 2007, at 18:50:05, Greg KH wrote:
> On Thu, Sep 20, 2007 at 05:31:37PM +0900, Tejun Heo wrote:
>> * Name-formatting for symlinks.  e.g. symlink pointing to /dira/ 
>> dirb/leaf can be named as "symlink:%1-%0" and it will show up as  
>> "symlink:dirb-leaf".  This only applies when new interface is used.
>
> Is this really necessary?  It looks like we are adding a "special"  
> type of parser here that no one uses.

IMHO this would be nicer if it could reuse existing sprintf code to  
handle all the nice shiny sprintf format specifiers.  The only  
challenge would be how to dynamically build a varargs list from an  
array of component names although perhaps there could be an internal  
__csprintf function which took a callback for retrieving arguments.   
Also since all of the path components are strings I don't know that  
numeric specifiers could be made useful, so perhaps it's not the  
greatest idea.

I think the primary importance for this functionality is:

>> * Autorenaming of symlinks according to the name format string  
>> when target or one of its ancestors is renamed or moved.  This  
>> only applies when new interface is used.
>
> Nice.

Cheers,
Kyle Moffett

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