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Doing DBus method calls using libdbus.so is tedious in the extreme. systemd developers came up with a nice high level API for DBus method calls (sd_bus_call_method). While systemd doesn't use libdbus.so, their API design can easily be ported to libdbus.so. This patch thus introduces methods virDBusCallMethod & virDBusMessageRead, which are based on the code used for sd_bus_call_method and sd_bus_message_read. This code in systemd is under the LGPLv2+, so we're license compatible. This code is probably pretty unintelligible unless you are familiar with the DBus type system. So I added some API docs trying to explain how to use them, as well as test cases to validate that I didn't screw up the adaptation from the original systemd code. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>