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Subject: Re: more thoughts on a new jail() system call
From: Shaya Potter <spotter@cs.columbia.edu>
To: linux-kernel@vger.kernel.org
In-Reply-To: <200207190306.g6J366956014@saturn.cs.uml.edu>
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On Thu, 2002-07-18 at 23:06, Albert D. Cahalan wrote:
> 
> >> sys_vhangup) NOT SURE -  Should be fine, right?
> >
> > Seems ok to me.
> 
> Have fun with devpts.

what would happen if a jail had virtualized ttys? i.e. they each had
tty1,2,3,4..... and this was transalted to an open real tty when needed,
and the transalation mapping being kept in the prison struct?

> 
> >> sys_getsid) NOT SURE - whats it for?
> >
> > You shouldn't be able to call getsid() on some other
> > process outside the jail.  Also, calling getsid() on
> > yourself might reveal information about your parent,
> > like getppid() or getpgid() (minor).
> 
> Your parent ought to be 1.

yes.

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