[CRIU] Re: [PATCH 2/3] tty: Mark living peers in tty_active_pairs bitmap

[Cyrill Gorcunov]

On Tue, Sep 18, 2012 at 06:55:36PM +0400, Pavel Emelyanov wrote:
> > +	/*
> > +	 * Now trace the paired/unpaired ttys. For example
> > +	 * the task might have slave peer assigned but no
> > +	 * master peer. Such "detached" master peers are
> > +	 * not yet supported by our tool and better to
> > +	 * inform a user about such situatio,
> > +	 */
> > +	if (!hangup || major == TTYAUX_MAJOR)
> 
> Can this _ever_ be false?

Sure -- you just need a slave peer which is alive (ie hangup == false).
The setting bit on master peer is for correspondence between master/slave
peers.