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6bff9c03c9
We can receive NULL as sync reply in two situations. First is garbage sync reply and this situation is handled by resending sync message. Second is different cases of rebooting guest, destroing domain etc and we can give more meaningful error message. Actually we have this error message in qemuAgentCommand already which checks for the same sitatuion. AFAIK case with mon->running is just to be safe on adding some future(?) cases of returning NULL reply.
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>