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library and tools for accessing and modifying virtual machine disk images. PLEASE DO NOT USE GITHUB FOR ISSUES OR PULL REQUESTS. See the website for how to file a bug or contact us.
C OCaml Perl Shell Java Python Other
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.gnulib @ eda101a Update gnulib to latest.
align daemon: parted: Always use -s option even with -m.
appliance appliance init: find NIC name for dhcpcd
bash Update copyright dates for 2015.
builder builder: add Sigchecker.verify_and_remove_signature
cat Fix various -Wformat problems.
contrib Update copyright dates for 2015.
csharp Update FSF address.
customize customize: Combine separate -a and -d option synopses (RHBZ#1246882)
daemon actions: tar_in: add xattrs, selinux, and acls optargs
df error log: keep more calloc and its error messages match
dib dib: handle --name with path
diff Fix various -Wformat problems.
edit error log: keep more calloc and its error messages match
erlang Update copyright dates for 2015.
examples Improve fixed appliance documentation
fish Fix various -Wformat problems.
format pod: Use F<> for filenames instead of C<>.
fuse pod: Use F<> for filenames instead of C<>.
generator actions: tar_in: add xattrs, selinux, and acls optargs
get-kernel get-kernel: add --prefix
gobject New API: btrfs-image
golang podwrapper: Remove =encoding from input files and add it back in podw…
haskell Update copyright dates for 2015.
html builder: Add the logo to the HTML manual page.
inspector error log: keep more calloc and its error messages match
java pod: Use F<> for filenames instead of C<>.
logo logo: Make the 5 years text larger and more readable for website.
lua podwrapper: Remove =encoding from input files and add it back in podw…
m4 Update gnulib to latest.
make-fs Fix various -Wformat problems.
mllib mllib: add and use read_first_line_from_file
ocaml ocaml: Add handling for errno EINVAL.
p2v p2v: tests: Don't fail when test machine has only a single hard disk.
perl perl: tests: reenable set_path tests
php php: Clean up more intermediate files.
po-docs Version 1.31.1.
po Version 1.31.1.
python Change guestfs___* to guestfs_int_*
rescue error log: keep more calloc and its error messages match
resize resize: make available expand method warnings more prominent
ruby ruby: Only rebuild rdoc when absolutely necessary.
sparsify pod: Use F<> for filenames instead of C<>.
src docs: When making a stable release, run ./configure --without-libvirt.
sysprep sysprep: machine_id: handle /var/lib/dbus/machine-id
test-tool Fix various -Wformat problems.
tests tests/nbd: pass --format to qemu-nbd if possible
tmp valgrind: Write separate log files in tmp/valgrind-<DATE>-<PID>.log
tools virt-win-reg: Make output of --version flag consistent (RHBZ#1213247).
v2v mllib: add and use read_first_line_from_file
.gitignore New tool: virt-dib
.gitmodules maint: use a git submodule for gnulib
.lvimrc Update vim line length to 70
.mailmap Add the .mailmap and change the method to generate AUTHORS
.x-sc_TAB_in_indentation Remove references to obsolete directory appliance/debian.
.x-sc_avoid_ctype_macros avoid syntax-check warning about isdigit use in example program
.x-sc_prohibit_have_config_h allow use of #if HAVE_CONFIG_H, for example code
.x-sc_prohibit_magic_number_exit maint: use EXIT_SUCCESS and EXIT_FAILURE, not 0 and 1 to exit
.x-sc_prohibit_strcmp tell "make syntax-check" that examples/to-xml.c is exempt from some t…
.x-sc_prohibit_strcmp_and_strncmp tell "make syntax-check" that examples/to-xml.c is exempt from some t…
.x-sc_trailing_blank tests: Split images -> tests/data + tests/guests
AUTHORS Version 1.29.48.
BUGS Version 1.31.1.
COPYING license: Use latest license files from gnu.org.
COPYING.LIB license: Use latest license files from gnu.org.
HACKING docs: Obsolete HACKING file, move content into guestfs(3) man page.
Makefile.am build: Add virt-dib.1.html and virt-get-kernel.1.html to HTMLFILES.
README README: Add the dnf builddep command (for Fedora >= 22).
TODO python: Call PyErr_Clear() on non-error paths out of the Python bindi…
autogen.sh syntax: Replace test == with = or -eq as appropriate.
bindtests bindtests: Test sending min and max 64 bit integers.
bootstrap tests: Enable and fix test-add-libvirt-dom test.
bugs-in-changelog.sh Update copyright dates for 2015.
cfg.mk syntax-check: Ignore more syntax-check problems.
common-rules.mk build: Add common-rules.mk, common rules for all Makefiles.
configure.ac Version 1.31.1.
guestfs-release-notes.pod docs: Finish off release notes for 1.30.
guestfs-release-notes.txt docs: Finish off release notes for 1.30.
intltool-extract.in Intltoolize the source.
intltool-merge.in Intltoolize the source.
intltool-update.in Intltoolize the source.
libtool-kill-dependency_libs.sh remove non-portable chmod
ocaml-link.sh build: factor out the OCaml link.sh scripts
pick-guests.pl.in Update copyright dates for 2015.
podwrapper.pl.in podwrapper: simplify external references pointing to self
run.in New tool: virt-dib
subdir-rules.mk Update copyright dates for 2015.
update-bugs.sh bugs: Ignore bugs in RELEASE_PENDING state.
valgrind-suppressions valgrind: Add suppression for libvirt memory leak.
zanata-pull.sh Move upstream translations from Tranifex to Zanata.
zanata.xml Move upstream translations from Tranifex to Zanata.

README

Libguestfs is tools and a library for accessing and modifying guest
disk images.  For more information see the home page:

  http://libguestfs.org/

For discussion, development, patches, etc. please use the mailing
list:

  http://www.redhat.com/mailman/listinfo/libguestfs


Requirements
----------------------------------------------------------------------

Running ./configure will check you have all the requirements installed
on your machine.

Fedora/RHEL users:

  A useful tip is to run:

    yum-builddep libguestfs
  or:
    dnf builddep libguestfs

  which will install all build dependencies automatically.  If that is
  successful, you don't need to bother with the rest of this section.

Debian/Ubuntu users:

  Use:

    apt-get build-dep libguestfs

  to install all build dependencies.  If that doesn't work, take a
  look at the Debian source package:
  http://packages.debian.org/source/libguestfs
  at the list of 'build-depends' and 'build-depends-indep', and
  install everything listed there.

  If either of those techniques is successful, you don't need to
  bother with the rest of this section.

The full requirements are described below.

                               R = Required
                               O = Optional
+==============+=============+===+=========================================+
| Package name | Min.version |   | Notes                                   |
+==============+=============+===+=========================================+
| Install as many packages listed in appliance/packagelist.in as possible. |
| This installs the disk management tools required by the appliance.  The  |
| list below is *additional* packages needed on the host.                  |
+--------------+-------------+---+-----------------------------------------+
| qemu         | 1.2.0       | R | 1.1 may work, but has broken virtio-scsi|
+--------------+-------------+---+-----------------------------------------+
| qemu-img     |             | R | >= 2.2.0 is required for virt-v2v but   |
|              |             |   | optional elsewhere                      |
+--------------+-------------+---+-----------------------------------------+
| kernel       | 2.6.34      | R | Make sure the following are enabled     |
|              |             |   | compiled in or as a module:             |
|              |             |   |  - virtio-pci                           |
|              |             |   |  - virtio-serial                        |
|              |             |   |  - virtio-block                         |
|              |             |   |  - virtio-net                           |
+--------------+-------------+---+-----------------------------------------+
| supermin     | 5.1.0       | R | This is required on all distros.        |
|              |             |   | 'supermin' is the new name for          |
|              |             |   | 'febootstrap'.                          |
|              |             |   | For alternatives, see:                  |
|              |             |   | libguestfs.org/download/binaries/appliance/
+--------------+-------------+---+-----------------------------------------+
| glibc        |             | R | We use various glibc-isms.              |
|              |             |   | Also glibc provides XDR, rpcgen.        |
+--------------+-------------+---+-----------------------------------------+
| GCC or LLVM  |             | R | We use __attribute__((cleanup)).        |
+--------------+-------------+---+-----------------------------------------+
| Perl         |             | R | Various build and test programs need    |
|              |             |   | Perl.  Not needed at runtime except if  |
|              |             |   | you need to run a handful of virt-*     |
|              |             |   | tools that are still written in Perl.   |
+--------------+-------------+---+-----------------------------------------+
| Pod::Man     |             | R | Part of Perl core.                      |
+--------------+-------------+---+-----------------------------------------+
| Pod::Simple  |             | R | Part of Perl core.                      |
+--------------+-------------+---+-----------------------------------------+
| OCaml        |             |R/O| Required if compiling from git.         |
|              |             |   | Optional if compiling from tarball.     |
|              |             |   | To build generated files and OCaml bindings.
+--------------+-------------+---+-----------------------------------------+
| findlib      |             |R/O| Required if compiling from git.         |
|              |             |   | Optional if compiling from tarball.     |
|              |             |   | To build generated files and OCaml bindings.
+--------------+-------------+---+-----------------------------------------+
| autotools    |             |R/O| Required if compiling from git.         |
|              |             |   | Optional if compiling from tarball.     |
|              |             |   | Autotools-based build system.           |
+--------------+-------------+---+-----------------------------------------+
| cpio         |             | R |                                         |
+--------------+-------------+---+-----------------------------------------+
| gperf        |             | R |                                         |
+--------------+-------------+---+-----------------------------------------+
| flex         |             | R | flex & bison are required for virt-     |
+--------------+-------------+---| builder.  We could make these           |
| bison        |             | R | optional but automakes makes it hard.   |
+--------------+-------------+---+-----------------------------------------+
| PCRE         |             | R | Perl-compatible Regular Expression lib. |
+--------------+-------------+---+-----------------------------------------+
| genisoimage  |             | R | mkisofs may work.                       |
+--------------+-------------+---+-----------------------------------------+
| libxml2      |             | R | Popular XML library.                    |
+--------------+-------------+---+-----------------------------------------+
| augeas       | 1.0.0       | R |                                         |
+--------------+-------------+---+-----------------------------------------+
| xz           |             | R | Used to compress disk images.           |
|              |             |   | Used by virt-builder for compression.   |
+--------------+-------------+---+-----------------------------------------+
| po4a         |             |R/O| Required if compiling from git.         |
|              |             |   | Optional if compiling from tarball.     |
|              |             |   | For localizing man pages.               |
+--------------+-------------+---+-----------------------------------------+
| hivex        | 1.2.7       |R/O| Require if compiling from git.          |
|              |             |   | Windows Registry hive parser.           |
+--------------+-------------+---+-----------------------------------------+
| libmagic     |             | O | The library used by the 'file' command. |
+--------------+-------------+---+-----------------------------------------+
| libvirt      |             | O | >= 0.10.2 is needed if you want to use  |
|              |             |   | libvirt to manage transient VMs.        |
+--------------+-------------+---+-----------------------------------------+
| xmllint      |             | O | Part of libxml2.  Used for tests only.  |
+--------------+-------------+---+-----------------------------------------+
| libconfig    |             | O | Used to parse libguestfs's own config   |
|              |             |   | files eg. /etc/libguestfs-tools.conf.   |
+--------------+-------------+---+-----------------------------------------+
| libselinux   |             | O | Used by the libvirt backend to securely |
|              |             |   | confine the appliance (sVirt).          |
+--------------+-------------+---+-----------------------------------------+
| db utils     |             | O | db_dump, db_load etc.  Usually found in |
|              |             |   | a package called db-utils, db4-utils,   |
|              |             |   | db4.X-utils, Berkeley DB utils, etc.    |
+--------------+-------------+---+-----------------------------------------+
| systemtap    |             | O | For userspace probes.                   |
+--------------+-------------+---+-----------------------------------------+
| readline     |             | O | For nicer command line in guestfish.    |
+--------------+-------------+---+-----------------------------------------+
| acl          |             | O | Library (libacl) and programs for       |
|              |             |   | handling POSIX ACLs.                    |
+--------------+-------------+---+-----------------------------------------+
| libcap       |             | O | Library (libcap) and programs for       |
|              |             |   | handling Linux capabilities.            |
+--------------+-------------+---+-----------------------------------------+
| libldm       |             | O | Library (libldm) and 'ldmtool' for      |
|              |             |   | handling Windows Dynamic Disks.         |
+--------------+-------------+---+-----------------------------------------+
| sd-journal   |             | O | systemd journal library                 |
+--------------+-------------+---+-----------------------------------------+
| yajl         | 2.0.4       | O | JSON parser for parsing output of       |
|              |             |   | ldmtool and qemu-img info commands.     |
+--------------+-------------+---+-----------------------------------------+
| gdisk        |             | O | GPT disk support.                       |
+--------------+-------------+---+-----------------------------------------+
| netpbm       |             | O | Render icons from guests.               |
+--------------+-------------+---+-----------------------------------------+
| icoutils     |             | O | Render icons from Windows guests.       |
+--------------+-------------+---+-----------------------------------------+
| Expect       |             | O | Perl module used to test virt-rescue.   |
+--------------+-------------+---+-----------------------------------------+
| FUSE         |             | O | fusermount, libfuse, and kernel module  |
|              |             |   | are all needed if you want guestmount   |
|              |             |   | and/or 'mount-local' support.           |
+--------------+-------------+---+-----------------------------------------+
| static glibc |             | O | Used for testing only.                  |
+--------------+-------------+---+-----------------------------------------+
| qemu-nbd     |             | O | Used for testing only.                  |
+--------------+-------------+---+-----------------------------------------+
| uml_mkcow    |             | O | For the UML backend.                    |
+--------------+-------------+---+-----------------------------------------+
| curl         |             | O | Used by virt-builder for downloads      |
+--------------+-------------+---+-----------------------------------------+
| gpg          |             | O | Used by virt-builder for digital        |
|              |             |   | signatures                              |
+--------------+-------------+---+-----------------------------------------+
| liblzma      |             | O | Can be used by virt-builder for fast    |
|              |             |   | uncompression of templates.             |
+--------------+-------------+---+-----------------------------------------+
| gtk2         |             | O | Used by virt-p2v user interface.        |
+--------------+-------------+---+-----------------------------------------+
| zip, unzip   |             | O | Used by virt-v2v for OVA files.         |
+--------------+-------------+---+-----------------------------------------+
| python-evtx  |             | O | Used by virt-log to parse Windows       |
|              |             |   | Event Log files.                        |
+--------------+-------------+---+-----------------------------------------+
| ocaml-gettext|             | O | For localizing OCaml virt-* tools.      |
+--------------+-------------+---+-----------------------------------------+
| Python       | 2.2         | O | For the Python bindings.                |
+--------------+-------------+---+-----------------------------------------+
| Ruby         |             | O | >= 1.9 is better than 1.8.              |
+--------------+-------------+---+-----------------------------------------+
| rake         |             | O | For the Ruby bindings.                  |
+--------------+-------------+---+-----------------------------------------+
| rubygem-minitest           | O | For the Ruby bindings.                  |
+--------------+-------------+---+-----------------------------------------+
| Java         | 1.6         | O | Java + JNI + jpackage-utils are needed  |
|              |             |   | for the Java bindings.                  |
+--------------+-------------+---+-----------------------------------------+
| GHC          |             | O | For the Haskell bindings.               |
+--------------+-------------+---+-----------------------------------------+
| PHP          |             | O | For the PHP bindings.                   |
+--------------+-------------+---+-----------------------------------------+
| phpize       |             | O | For the PHP bindings.                   |
+--------------+-------------+---+-----------------------------------------+
| glib2        |             | O | For the GObject bindings.               |
+--------------+-------------+---+-----------------------------------------+
| gobject-introspection      | O | For the GObject bindings.               |
+--------------+-------------+---+-----------------------------------------+
| gjs          |             | O | For testing the GObject bindings.       |
+--------------+-------------+---+-----------------------------------------+
| LUA          |             | O | For the LUA bindings.                   |
+--------------+-------------+---+-----------------------------------------+
| Erlang       |             | O | For the Erlang bindings.                |
+--------------+-------------+---+-----------------------------------------+
| erl_interface|             | O | For the Erlang bindings.                |
+--------------+-------------+---+-----------------------------------------+
| golang       | 1.1.1       | O | For the Go bindings.                    |
+--------------+-------------+---+-----------------------------------------+
| valgrind     |             | O | For testing for memory problems.        |
+--------------+-------------+---+-----------------------------------------+
| Sys::Virt    |             | O | Perl bindings for libvirt.              |
+--------------+-------------+---+-----------------------------------------+
| libvirt-python             | O | For testing Python libvirt/libguestfs   |
|              |             |   | interactions.                           |
+--------------+-------------+---+-----------------------------------------+
| Win::Hivex   |             | O | Perl bindings for hivex.                |
+--------------+-------------+---+-----------------------------------------+
| Pod::Usage   |             | O | Perl module used by tests.              |
+--------------+-------------+---+-----------------------------------------+
| Test::More   |             | O | Perl module used by tests.              |
+--------------+-------------+---+-----------------------------------------+
| perl-libintl |             | O | Perl module for localization.           |
+--------------+-------------+---+-----------------------------------------+
| bash-completion            | O | For tab-completion of commands in bash. |
+--------------+-------------+---+-----------------------------------------+
| ocaml-ounit  | 2.0.0       | O | For the tests of the common OCaml       |
|              |             |   | modules.                                |
+--------------+-------------+---+-----------------------------------------+
| ocaml-libvirt| 0.6.1.5     | O | For building the virt-v2v test harness. |
+==============+=============+===+=========================================+
                               R = Required
                               O = Optional


Building
----------------------------------------------------------------------

Build the daemon, library and root filesystem:

  building from tarball     building from git
  ---------------------     -----------------
    ./configure               ./autogen.sh
    make                      make

Run the tests:

  make check

Also:

 make check-valgrind

runs a subset of the test suite under valgrind (requires valgrind to
be installed obviously).

 make check-all

runs check-valgrind + even more tests, but these require that you have
some libvirt guests installed, that these guests' disks are accessible
by the current user, and these tests may fail for other reasons which
are not necessarily because of real problems.

 make help

lists all 'make' targets.

You may install the library by running the following command as root.
However *most users should probably not do this*.  Instead, './run'
the programs from the build directory as described below.

  make install

Distro packagers should use this instead:

 make INSTALLDIRS=vendor [DESTDIR=...] install

You can run guestfish, guestmount and the virt tools without needing
to install, using the "./run" script in the top directory.  This
script sets up some environment variables.  For example:

  ./run guestfish [usual guestfish args ...]

  ./run virt-inspector [usual virt-inspector args ...]

If you are already in the fish/ subdirectory, then the following
command will also work:

  ../run guestfish [...]

The ./run script adds every libguestfs binary to the $PATH, so the
above example runs guestfish from the build directory (not the
globally installed guestfish if there is one).

You can also run the C programs under valgrind like this:

  ./run valgrind [valgrind opts...] virt-cat [virt-cat opts...]

or under gdb:

  ./run gdb --args virt-cat [virt-cat opts...]

This also works with sudo (eg. if you need root access for libvirt or
to access a block device):

  sudo ./run virt-cat -d LinuxGuest /etc/passwd


qemu
----------------------------------------------------------------------

By far the most common problem is with broken or incompatible
qemu releases.

Different versions of qemu have problems booting the appliance for
different reasons.  This varies between versions of qemu, and Linux
distributions which add their own patches.

If you find a problem, you could try using your own qemu built from
source (qemu is very easy to build from source), with a 'qemu
wrapper'.  Qemu wrappers are described in the guestfs(3) manpage.


Note on using KVM
----------------------------------------------------------------------

By default the configure script will look for qemu-kvm (KVM support).
You will need a reasonably recent processor for this to work.  KVM is
much faster than using plain Qemu.

You may also need to enable KVM support for non-root users, by following
these instructions:

  http://www.linux-kvm.org/page/FAQ#How_can_I_use_kvm_with_a_non-privileged_user.3F

On some systems, this will work too:

  chmod 0666 /dev/kvm

On some systems, the chmod will not survive a reboot, and you will
need to make edits to the udev configuration.


Mirroring tip
----------------------------------------------------------------------

On my machines I can usually rebuild the appliance in around 3
minutes.  If it takes much longer for you, use a local distro mirror
or squid.

To use squid to cache yum downloads, read this first:
https://lists.dulug.duke.edu/pipermail/yum/2006-August/009041.html
(In brief, because yum chooses random mirrors each time, squid doesn't
work very well with default yum configuration.  To get around this,
choose a Fedora mirror which is close to you, set this with
'./configure --with-mirror=[...]', and then proxy the whole lot
through squid by setting http_proxy environment variable).

You will also need to substantially increase the squid configuration
limits:
http://fedoraproject.org/wiki/Using_Mock_to_test_package_builds#Using_Squid_to_Speed_Up_Mock_package_downloads


Porting to other Linux distros / non-Linux
----------------------------------------------------------------------

libguestfs itself should be fairly portable to other Linux
distributions.  Non-Linux ports are trickier, but we will accept
patches if they aren't too invasive.

The main porting issues are with the dependencies needed to build the
appliance.  You will need to port supermin first
(http://people.redhat.com/~rjones/supermin/).


Note on using clang (from LLVM) instead of GCC
----------------------------------------------------------------------

  export CC=clang
  ./configure --disable-probes
  make

SystemTap/DTrace-style userspace probe points don't work under the
clang compiler, which is why you may need to disable them.

Don't enable GCC warnings (ie. *don't* use
'./configure --enable-gcc-warnings').


Copyright and license information
----------------------------------------------------------------------

Copyright (C) 2009-2015 Red Hat Inc.

The library is distributed under the LGPLv2+.  The programs are
distributed under the GPLv2+.  Please see the files COPYING and
COPYING.LIB for full license information.

The examples are under a very liberal license.
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