On Mon, Jan 06, 2014 at 12:20:07PM +0100, Patrick Ohly wrote:
> On Mon, 2014-01-06 at 18:11 +0800, Yang Chengwei wrote:
> > On Thu, Jan 02, 2014 at 10:48:16PM +0000, Schaufler, Casey wrote:
> > > You can change the Smack label of your process to “_” by:
> > > 
> > >  
> > > 
> > >                 # echo _ > /proc/self/attr/current
> > 
> > Isn't the /proc/self point to the current "echo" process?
> 
> Not always. This relies on echo being a builtin command of the current
> shell, so the command really does change the label of the current shell
> process when using e.g. bash.

Oh, yes, there is a builtin echo in bash, so echo always the builtin one
rather the one from coreutils. Thanks!

--
Thanks,
Chengwei

> 
> It's probably safer to be explicit:
> 
>   echo _ > /proc/$$/attr/current
> 
> -- 
> Best Regards, Patrick Ohly
> 
> The content of this message is my personal opinion only and although
> I am an employee of Intel, the statements I make here in no way
> represent Intel's position on the issue, nor am I authorized to speak
> on behalf of Intel on this matter.
> 

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