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In daemons using pidfiles to protect against concurrent execution there is a possibility that a crash may leave a stale pidfile on disk, which then prevents later restart of the daemon. To avoid this problem, introduce a pair of APIs which make use of virFileLock to ensure crash-safe & race condition-safe pidfile acquisition & releae * src/libvirt_private.syms, src/util/virpidfile.c, src/util/virpidfile.h: Add virPidFileAcquire and virPidFileRelease
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>