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Given a PID, the QEMU driver reads /proc/$PID/cmdline and /proc/$PID/environ to get the configuration. This is fed into the ARGV->XML convertor to build an XML configuration for the process. /proc/$PID/exe is resolved to identify the full command binary path After checking for name/uuid uniqueness, an attempt is made to connect to the monitor socket. If successful then 'info status' and 'info kvm' are issued to determine whether the CPUs are running and if KVM is enabled. * src/qemu/qemu_driver.c: Implement virDomainQemuAttach * src/qemu/qemu_process.h, src/qemu/qemu_process.c: Add qemuProcessAttach to connect to the monitor of an existing QEMU process
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>