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import dbus
import tuned.logs
log = tuned.logs.get()
class polkit():
def __init__(self):
self._bus = dbus.SystemBus()
self._proxy = self._bus.get_object('org.freedesktop.PolicyKit1', '/org/freedesktop/PolicyKit1/Authority', follow_name_owner_changes = True)
self._authority = dbus.Interface(self._proxy, dbus_interface='org.freedesktop.PolicyKit1.Authority')
def check_authorization(self, sender, action_id):
"""Check authorization, return codes:
1 - authorized
2 - polkit error, but authorized with fallback method
0 - unauthorized
-1 - polkit error and unauthorized by the fallback method
-2 - polkit error and unable to use the fallback method
"""
if sender is None or action_id is None:
return False
details = {}
flags = 1 # AllowUserInteraction flag
cancellation_id = "" # No cancellation id
subject = ("system-bus-name", {"name" : sender})
try:
ret = self._authority.CheckAuthorization(subject, action_id, details, flags, cancellation_id)[0]
except (dbus.exceptions.DBusException, ValueError) as e:
log.error("error querying polkit: %s" % e)
# No polkit or polkit error, fallback to always allow root
try:
uid = self._bus.get_unix_user(sender)
except dbus.exceptions.DBusException as e:
log.error("error using falback authorization method: %s" % e)
return -2
if uid == 0:
return 2
else:
return -1
return 1 if ret else 0