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Date: Tue, 31 Jul 2007 05:01:18 +0100
From: Al Viro <viro@ftp.linux.org.uk>
To: linux-kernel@vger.kernel.org
Subject: Re: inotify and /proc/<pid>
Message-ID: <20070731040118.GJ21089@ftp.linux.org.uk>
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On Mon, Jul 30, 2007 at 10:56:27PM -0500, Joseph Pingenot wrote:
> >From Al Viro on Tuesday, 31 July, 2007:
> >On Mon, Jul 30, 2007 at 10:40:59PM -0500, Joseph Pingenot wrote:
> >> I'm trying to implement pwait.  It blocks until a specified PID exits,
> >>   and then it exits.
> >er... ptrace(2)?
> 
> Should work for most common usage scenarios, although will suspect that it
>   won't for for processes owned by another user (at least, I hope
>   it wouldn't).
> 
> What is dangerous about inotify on a proc file?

Playing with the lifetime rules, for starters...