[Qt-interest] QDBusConnection::sessionBus isn't connected when no X started

[Thiago Macieira]

michael kapelko wrote:
>Hello.
>Running QDBusConnection::sessionBus under a user with no X started
>yields the following QDBusError:
>'dbus-launch failed to autolaunch D-Bus session: Autolaunch error: X11
>initialization failed'.
>When running under a user with X started, everything's just fine.
>I need to run an application as a daemon under a user (root) with no X
> started. Running 'dbus-launch ./myapp' does not solve anything as it
> creates a new session bus for that application only, whereas I want to
> access "global" D-Bus to:
>1) run only a single instance of the app;
>2) control the running instance through invoking switches: './myapp
>--reloadConfig' (for use in scripts).
>How to solve the problem?

There's no "global" session bus in D-Bus.

If you're using a session bus, it's per user and needs to be started 
manually if X isn't running.

However, there's the system bus (which is global). In that case, you use 
QDBusConnection::systemBus. Note that you must modify /etc/dbus-1/system.d 
to allow yourself to own the name you're trying to own.

-- 
Thiago Macieira - thiago.macieira (AT) nokia.com
  Senior Product Manager - Nokia, Qt Software
      Sandakerveien 116, NO-0402 Oslo, Norway
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