[gpm] Privilege of GPM

[Jeff Cai <Jeff Cai Sun COM>]

Hi, Richard and all
As I know, GPM uses PolicyKit to implement permission control for users.
I take "hibernate" as an Example. If a user wants to perform the action 
of hibernate, GPM will invoke "gpm_control_allowed_hibernate" to 
determine whether the current user has the permission to do that. In 
"gpm_control_allowed_hibernate", GPM will invoke 
"gpm_polkit_is_user_privileged" to get the answer according to the 
PolicyKit policy. But from the working diagram of 
PolicyKit(http://webcvs.freedesktop.org/hal/PolicyKit/doc/spec/polkit-arch.png?revision=1.1), 
the permission checking should really occur within HAL service 
implementation while not in GPM code.
GPM also invodes "power_management.can_hibernate" to know whether the 
kernel supports this action , this is not related with permission checking.
My questions here are:
1. Is there any permission checking in HAL?
2. Does GPM plan to implement that kind of permission checking like 
http://webcvs.freedesktop.org/hal/PolicyKit/doc/spec/polkit-arch.png?revision=1.1?

Regards

Jeff