[libvirt-users] [API reference] Are there XML-handling API to retrieve info directly from xml configure file

[Zhihua Che]

在 2012年4月10日 下午4:33，Daniel P. Berrange <berrange at redhat.com> 写道：
> On Sat, Apr 07, 2012 at 10:36:04PM +0100, Richard W.M. Jones wrote:
>> On Fri, Apr 06, 2012 at 03:24:25PM +0800, Zhihua Che wrote:
>> > Hi, everyone
>> >
>> >     I'm writing a application using libvirt and need to query guest
>> > os's virtual network interface usage, like bytes read or written
>> > through a given interface. I know int
>> > virDomainInterfaceStats(virDomainPtr dom, const char * path,
>> >             virDomainInterfaceStatsPtr stats,  size_t size) is designed for my
>> > purpose but I 'm not sure how I determine the second parameter path.
>> > I'm now think of determining the virtual interface by parsing the
>> > domain's xml configure file.
>> > But I don't find that libvirt  supply such functions, that means, I
>> > have to resort to other library lik libxml?
>>
>> I would also really like to see such an API/APIs in the basic
>> libvirt API.
>
> The libvirt-gconfig library provides this capability. NB, the libvirt-gconfig
> library is strictly independant of libvirt-gobject, since it is intended that
> you can use the libvirt-gconfig XML handling APIs, with the plain C libvirt
> APIs.
>
> Regards,
> Daniel


I compile and install the libvirt-glib and I find its doc a little
lean. I mean it's really hard to get applicable info from it because
it just lists a list of functions without introducing any concepts
first.

I find the doc in share/gtk-doc directory. Do I miss anything?  Is
there any sample code or introduction to its concepts?

BTW, Does libvirt supply any function which can return the process
identifier of the domain?

Thanks