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Re: Heads up: bluetoothd on-demand startup

On Fri, 2009-06-12 at 20:44 +0200, Lennart Poettering wrote:
> On Fri, 12.06.09 19:26, Bastien Nocera (bnocera redhat com) wrote:
> > Every time there's an add action for a Bluetooth device, udev will run
> > "bluetoothd --udev".
> > 
> > bluetoothd will fail with an error if D-Bus isn't started (on bootup),
> > and the udev coldplug (done in udev-post) will run the rule again.
> > 
> > bluetoothd will silently fail when it's already running.
> > 
> > bluetoothd will exit itself after 30 seconds when no adapters are
> > present. There's a potential race if the udev add event happens in
> > between the time the time the running bluetoothd reliquinshes its D-Bus
> > service, and the new one starts up.
> This could be fixed by first releasing the service name synchronously,
> then processing all queued requests and only then closing/exiting.
> Hmm, will bluetoothd also be started via bus activation? If so, it
> wuld probably make sense to issue a StartByName D-Bus request from the
> udev rule and let dbus handle all the ordering/synchronization issues
> with starting up bluetoothd.

No, there's no service activation support. Would it be useful?

> I know at least one application (PA) that wouldn't reconnect to coming
> and going bluetoothd's, that's why I am asking.

Which is why we're doing it early in F-12. At least obex-data-server is
broken as well.

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