[sugar] python activities startup
Tomeu Vizoso
tomeu at tomeuvizoso.net
Fri Feb 8 07:41:07 EST 2008
On Thu, 2008-02-07 at 16:46 +0000, Simon McVittie wrote:
> A better solution would be for Rainbow to avoid SessionBus() entirely,
> and instead use an instance of the superclass, dbus.bus.BusConnection. This
> does not have the weird caching behaviour at all (one call to the
> constructor = one instance = one D-Bus connection). The code that gets run
> after forking is still free to use the shared SessionBus.
Rainbow is not using the session bus at all, just the system one.
But when the child tries to instantiate a SessionBus object, I get this stack trace:
/usr/lib/python2.5/site-packages/sugar/presence/presenceservice.py in __init__(self=<PresenceService object at 0x86afbbc (sugar+presence+presenceservice+PresenceService at 0x86f1370)>, allow_offline_iface=False)
73
74 # Get a connection to the session bus
---> 75 self._bus = dbus.SessionBus()
self._bus = undefined
global dbus.SessionBus = <class 'dbus._dbus.SessionBus'>
76 self._bus.add_signal_receiver(self._name_owner_changed_cb,
77 signal_name="NameOwnerChanged",
/usr/lib/python2.5/site-packages/dbus/_dbus.py in __new__(cls=<class 'dbus._dbus.SessionBus'>, private=False, mainloop=None)
211 """
212 return Bus.__new__(cls, Bus.TYPE_SESSION, private=private,
--> 213 mainloop=mainloop)
mainloop = None
214
215 class StarterBus(Bus):
/usr/lib/python2.5/site-packages/dbus/_dbus.py in __new__(cls=<class 'dbus._dbus.SessionBus'>, bus_type=0, private=False, mainloop=None)
100 raise ValueError('invalid bus_type %s' % bus_type)
101
--> 102 bus = BusConnection.__new__(subclass, bus_type, mainloop=mainloop)
bus = undefined
global BusConnection.__new__ = <function __new__ at 0x822733c>
subclass = <class 'dbus._dbus.SessionBus'>
bus_type = 0
mainloop = None
103
104 bus._bus_type = bus_type
/usr/lib/python2.5/site-packages/dbus/bus.py in __new__(cls=<class 'dbus._dbus.SessionBus'>, address_or_type=0, mainloop=None)
123
124 def __new__(cls, address_or_type=TYPE_SESSION, mainloop=None):
--> 125 bus = cls._new_for_bus(address_or_type, mainloop=mainloop)
bus = undefined
cls._new_for_bus = <built-in method _new_for_bus of type object at 0x8256f44>
address_or_type = 0
mainloop = None
126
127 # _bus_names is used by dbus.service.BusName!
<class 'dbus.exceptions.DBusException'>: org.freedesktop.DBus.Error.NoServer: Failed to connect to socket /tmp/dbus-7dk02BRXOZ: Connection refused
This is the value of the DBUS_SESSION_BUS_ADDRESS env var:
unix:path=/tmp/olpc-session-bus,guid=fdf37ebd35a585d12382a50047ac3034
unix:path=/tmp/olpc-session-bus is specified
in /etc/dbus-1/session-olpc.conf:
<busconfig>
<!-- Our well-known bus type, don't change this -->
<type>session</type>
<listen>unix:path=/tmp/olpc-session-bus</listen>
<standard_session_servicedirs />
...
Any ideas?
Thanks,
Tomeu
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