Re: [gdm-list] how to use authentication feature of GDM in a screen saver

[Jeff Cai <Jeff Cai Sun COM>]

于 2010-4-9 19:46, Ray Strode 写道:
> Hi,
>
>    
> > Yes, I noticed that. The problem is that session worker does not provides
> > any useful interfaces. It connects to session slave through a private bus
> > created by session slave, answers to the DBus signals emitted by session
> > slave. The greeter server is the only DBus object I can find which provides
> > the PAM authentication inerface I need although they are only provided
> > through a private bus.
> >      
> Well the greeter server is basically just wrapping the GdmSession
> interface in an interface available to the greeter (along with some
> other stuff like session selection).  If you were going to down this
> route, you'd probably want to use something like GdmSessionRelay
> exposed over the session bus (or via a private connection accessible
> from the session bus).
>
> Of course, GDM doesn't know about the session bus, since it's started
> after GDM starts the Xsession script.  You would probably need to
> change GDM to start the session bus so that it knows about it.
> Actually, that's probably a good idea anyway orthogonal to all of
> this.  That means some distributions will need to be updated, though.
>
> But stepping back a little... I'm not sure it's a good idea to do
> things this way.
>
>    
> > In that case, we want to integrate the GUI from gnome-screensaver with the PAM
> > implemenation from gdm.
> >      
> Why?  Why not just keep screensaver doing what it already does for those cases?
>    
On some platform, for example, OpenSolaris, PAM backend should be run in 
root. We expect to find such a program which can authenticate via PAM 
for gnome-screensaver. gdm-session-worker seems to be a good program 
helps to do that.

Jeff
> --Ray
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