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Daniel P. Berrange
e1da464d88
Add some APIs which use locking for crashsafe pidfile handling
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>
Description
Libvirt provides a portable, long term stable C API for managing the
virtualization technologies provided by many operating systems. It
includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware
vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER
Hypervisor.
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