__init__.py 文件源码

def _check_permission(self, sender, action):
        '''
        Verifies if the specified action is permitted, and raises
        an AccessDeniedException if not.

        The caller should use ObtainAuthorization() to get permission.
        '''

        try:
            if sender:
                kit = dbus.SystemBus().get_object('org.freedesktop.PolicyKit1', '/org/freedesktop/PolicyKit1/Authority')
                kit = dbus.Interface(kit, 'org.freedesktop.PolicyKit1.Authority')

                (granted, _, details) = kit.CheckAuthorization(
                                ('system-bus-name', {'name': sender}),
                                action, {}, dbus.UInt32(1), '', timeout=600)

                if not granted:
                    raise AccessDeniedException('Session not authorized by PolicyKit')

        except AccessDeniedException:
            raise

        except dbus.DBusException, ex:
            raise AccessDeniedException(ex.message)