linux-kernel - Re: [patch 1/4] fs, proc: Introduce /proc/<pid>/task/<tid>/children entry v8

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Date:	Wed, 25 Jan 2012 10:55:51 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Pavel Emelyanov <xemul@...allels.com>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Kees Cook <keescook@...omium.org>, Tejun Heo <tj@...nel.org>,
	Andrew Vagin <avagin@...nvz.org>,
	Alexey Dobriyan <adobriyan@...il.com>
Subject: Re: [patch 1/4] fs, proc: Introduce /proc/<pid>/task/<tid>/children
 entry v8

On Tue, Jan 24, 2012 at 06:11:21PM -0800, Eric W. Biederman wrote:
> KOSAKI Motohiro <kosaki.motohiro@...il.com> writes:
> >>
> >> How would these symlinks look like? "../../pid"? There were a conversation
> >> about such things (https://lkml.org/lkml/2011/12/2/142) but I suppose we
> >> were agree on children with pids as consensus.
> >
> > I couldn't find any agreement in this link. Suppose wrong url?
> 
> Now that you have reminded me of this thread.  I can say that the
> link would need to look like ../../pid.  Our children will always
> be thread group leaders, so we can safely point to the /proc/<pid>
> directories.  So readlink would return ../../<pid> or however many
> dots are needed.  Follow link could just warp us to that directory
> as it does for the other magic proc symlinks.
> 
> My feeling is that a children subdirectory would be a lot more useful
> than a simple file that lists the children.
> 

I'll check what I can do, thanks.

	Cyrill
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