Re: [Qemu-devel] [RFC] QEMU Dbus support - a proposal management API

[Fabrice Bellard <fabrice@bellard.org>]

Daniel P. Berrange wrote:
> On Tue, Dec 11, 2007 at 09:16:43AM +0200, Yuval Kashtan wrote:
>> - This is very useful when you want to manage and control QEMU, for instance
>> developing a GUI to attach and detach usb devices or controlling more than
>> one instance of QEMU from a single management point, receiving parameters
>> externally and more.
> 
> This capability is already possible using the monitor API. I've implemented
> it in libvirt, and in virt-manager and can easily hotplug/remove USB devices.
> So DBus is not required to do this and does not really make it any easier
> to use. DBus is very verbose to use from languages like C, so switching from
> the monitor to DBus API would not really help simplify my existing code. On
> the other hand, having a library providing a simple client side C API to 
> send & receive monitor commands, would be beneficial

For the short term I think it is better as you said to rely on libvirt 
which already has some support for QEMU.

As it was suggested, improving the monitor seems the easiest, maybe with 
an additionnal mode to provide a standardized way to get a return value 
for each command. Providing an example client code to directly use the 
monitor seems a good idea too.

Regarding the configuration, I can assure there will be soon a QEMU 
configuration file. The question is whether it will be included before 
the next release is out !

Regards,

Fabrice.