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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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1ae2604552
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Eric Blake 1ae2604552 command: avoid double close bugs 
KAMEZAWA Hiroyuki reported a nasty double-free bug when virCommand
is used to convert a string into input to a child command.  The
problem is that the poll() loop of virCommandProcessIO would close()
the write end of the pipe in order to let the child see EOF, then
the caller virCommandRun() would also close the same fd number, with
the second close possibly nuking an fd opened by some other thread
in the meantime.  This in turn can have all sorts of bad effects.

The bug has been present since the introduction of virCommand in
commit f16ad06f.

This is based on his first attempt at a patch, at
https://bugzilla.redhat.com/show_bug.cgi?id=823716

* src/util/command.c (_virCommand): Drop inpipe member.
(virCommandProcessIO): Add argument, to avoid closing caller's fd
without informing caller.
(virCommandRun, virCommandNewArgs): Adjust clients.
(cherry picked from commit da831afcf2)
2012-06-14 18:23:21 -04:00
.gnulib@bb2f5640d5 build: fix bootstrap on RHEL 2012-04-26 14:13:49 -04:00
daemon Fix mistakes in augeas lens 2012-06-14 18:23:20 -04:00
docs docs: typo in acceleration element 2012-06-14 18:23:20 -04:00
examples examples: add consolecallback example python script 2012-06-14 18:23:20 -04:00
gnulib build: fix fresh checkout on RHEL5 2012-04-25 16:36:26 -04:00
include snapshot: add atomic create flag 2012-03-23 16:38:20 -06:00
m4 Enable all warnings permanently & default to -Werror for GIT builds 2012-03-27 17:08:06 +01:00
po Stable release 0.9.11.3 2012-04-27 14:58:18 -04:00
python Coverity: Fix the forward_null error in Python binding codes 2012-06-07 18:15:49 -04:00
src command: avoid double close bugs 2012-06-14 18:23:21 -04:00
tests tests: run valgrind on real executables, not libtool wrappers 2012-06-14 18:22:52 -04:00
tools Remove last usage of PATH_MAX and ban its future use 2012-06-14 18:22:52 -04:00
.dir-locals.el maint: let emacs avoid tabs in rng files 2011-08-13 08:56:26 -06:00
.gitignore Stable release 0.9.11.3 2012-04-27 14:58:18 -04:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap maint: prune duplicate listings in AUTHORS 2012-02-03 09:56:45 -07:00
AUTHORS esx: Fix segfault in esxConnectToHost 2012-04-25 16:39:49 -04:00
autobuild.sh Enable all warnings permanently & default to -Werror for GIT builds 2012-03-27 17:08:06 +01:00
autogen.sh build: allow for local gnulib diffs 2011-11-09 09:03:33 -07:00
bootstrap build: fix bootstrap on RHEL 2012-04-26 14:13:49 -04:00
bootstrap.conf build: fix bootstrap on RHEL 2012-04-26 14:13:49 -04:00
cfg.mk Remove last usage of PATH_MAX and ban its future use 2012-06-14 18:22:52 -04:00
ChangeLog-old virterror.c: Fix several spelling mistakes 2012-02-03 11:32:51 -07:00
configure.ac maint: avoid new automake warning about AM_PROG_CC_STDC 2012-06-14 18:22:52 -04:00
COPYING.LIB remove all trailing blank lines 2009-07-16 15:06:42 +02:00
HACKING Document STREQ_NULLABLE and STRNEQ_NULLABLE 2011-10-06 16:50:38 +02:00
libvirt.pc.in build: silence warning from autoconf 2012-06-14 18:23:21 -04:00
libvirt.spec.in Fix dep from libvirt-lock-sanlock RPM 2012-06-14 18:22:52 -04:00
Makefile.am maint: add missing copyright notices 2011-07-28 15:01:17 -06:00
Makefile.nonreentrant Ban use of all inet_* functions 2010-10-22 11:59:23 +01:00
mingw32-libvirt.spec.in Fix typos in API XML file paths 2012-02-15 11:29:38 +00:00
README Correct typos in the documentation (Atsushi SAKAI) 2008-01-24 10:15:13 +00:00
README-hacking maint: relax git minimum version 2010-02-24 14:29:27 -05:00
TODO Update todo list file to point at bugzilla/website 2010-10-13 16:45:26 +01:00

README 

         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>