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Re: PolicyKit changes in F12



On Mon, 2009-05-18 at 10:57 +0100, Daniel P. Berrange wrote:
> On Sun, May 17, 2009 at 09:14:03AM +0100, Richard Hughes wrote:
> > On Sat, May 16, 2009 at 8:56 AM, Daniel Veillard <veillard redhat com> wrote:
> > >  ? No kit_* OOM handling in the new library
> > > means ?
> > 
> > The old kit_* functions used to handle OOM (out of memory conditions)
> > and report back the correct error. The new library is more GLib like,
> > and doesn't handle OOM very well at all. It's likely you didn't care
> > about OOM before, so this change won't affect you.
> 
> Well there are two ends to this. The client app side (eg virt-manager)
> we don't care about OOM, since we're using GTK and that just aborts all
> the time. For the service end, eg libvirtd, we do care about OOM handling
> and we test for it, so this change is an unfortunate regression :-(

No, there is no regression here. As I tried to explain in the reply to
Veillard:

 1. In libvirtd, simply check for authorization by speaking to the
    polkitd-1 using either the D-Bus API (via e.g. libdbus-1 which
    handles OOM) or a through helper.

 2. virt-manager will not have to know _anything_ about PolicyKit

And if either polkitd-1 or the helper aborts() due to OOM, then you will
get a D-Bus error back (or if using a helper, WIFEXITED(status) != 0)
and you can check the authorization again - this works because the bus
daemon (which handles OOM) will then reactivate polkitd-1.

     David



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