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This implements FUSE filesystem support so that any libguestfs-
accessible disk image can be mounted as a local filesystem.
Note: file writes (ie. write(2) system call) is not yet implemented.
The API needs more test coverage, particularly lesser-used system
calls.
The big unresolved issue is UID/GID mapping between guest filesystem
IDs and the host. It's not easy to automate this because you need
extra details about the guest itself in order to get to its
UID->username map (eg. /etc/passwd from the guest).
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In hivex/: This mini-library allows us to extract Windows
Registry binary files ("hives").
There are also two tools: hivexml converts a hive to a
self-describing XML format. hivexget can be used to extract
single subkeys from a hive.
New tool: virt-win-reg. This is a wrapper around the library
functionality allowing you to pull out data from the registries
of Windows guests.
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This tool makes available the functionality of "ls", "ll", and "find"
in a slightly simpler to use form.
Examples:
virt-ls -l myguest /tmp
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This adds a new tool call virt-tar which is a general purpose
archive and uploading tool. It doesn't add any functionality
which wasn't previously possible using guestfish, but makes it
simpler to access for some users.
Examples:
virt-tar -zx myguest /home home.tar.gz
virt-tar -zu myguest uploadstuff.tar.gz /tmp
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This moves the tool programs into a single directory:
cat/* -> tools/virt-cat
df/* -> tools/virt-df
edit/* -> tools/virt-edit
rescue/* -> tools/virt-rescue
This in itself simplifies the build process because we only need
one Makefile and one copy of 'run-locally'.
'run-*-locally' has become just 'run-locally' and takes an extra
parameter which is the name of the tool, eg:
run-locally cat [virt-cat params...]
virt-inspector stays in its own directory, because this contains
more than just a single Perl script.
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This commit adds a generic mechanism for deriving language bindings
for virt-inspector, and implements one concrete binding, for OCaml.
The bindings are generated from the RELAX NG schema (virt-inspector.rng)
which is supposed to be a correct and always up to date description
of the XML that the virt-inspector program can generate.
From the RNG we generate a set of types to describe the output of
virt-inspector for the language, plus an XML parser, plus some
glue code to actually run an external instance of virt-inspector
and parse the resulting XML.
At runtime, an external 'virt-inspector --xml <name>' command runs
and the XML is parsed into language-specific structures.
This has been tested on the four example files (inspector/example?.xml)
The only particular difficulty about the OCaml binding is the use of
Obj.magic, which is naughty but works because of the isomorphism
between the representation of tuples and records in OCaml. This
seems to cause no problems in my test program. Apart from this, the
OCaml binding is straightforward and could be adapted easily for any
other languages that want type-safe virt-inspector bindings.
It's important to keep virt-inspector.rng up to date with changes
to virt-inspector's XML output format.
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This is an example of how to write an app which uses libguestfs
and libvirt, and has a responsive user interface (using threads).
It is a Gtk-based "graphical virt-df".
Read the top of the 'viewer.ml' file first for instructions on
how to compile. This program is not compiled by default.
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Edit any file in a guest. This was possibly previously
using guestfish, but having a separate command makes it
simpler.
The usage is simply:
virt-edit mydomain /some/file
It runs $EDITOR or vi on the file, and if the user changes
it, uploads the result back to the VM.
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This command runs a "rescue appliance" against a virtual machine
or disk image. This is useful for making ad-hoc interactive
changes to virtual machines.
$ virt-rescue --ro /dev/vg_trick/F11x64
Welcome to virt-rescue, the libguestfs rescue shell.
Note: The contents of / are the rescue appliance.
You have to mount the guest's partitions under /sysroot
before you will be able to examine them.
bash: cannot set terminal process group (-1): Inappropriate ioctl for device
bash: no job control in this shell
><rescue> mount /dev/vg_f11x64/lv_root /sysroot
EXT4-fs (dm-0): barriers enabled
kjournald2 starting: pid 269, dev dm-0:8, commit interval 5 seconds
EXT4-fs (dm-0): internal journal on dm-0:8
EXT4-fs (dm-0): delayed allocation enabled
EXT4-fs: file extents enabled
EXT4-fs: mballoc enabled
EXT4-fs (dm-0): mounted filesystem with ordered data mode
><rescue> ls /sysroot/
bin dev home lib64 media opt root selinux sys usr
boot etc lib lost+found mnt proc sbin srv tmp var
><rescue> exit
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This can be used by people building from source and packagers for
their own purposes.
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Previously non-daemon actions were called directly by
user code, eg:
/* Non-generated */
int
guestfs_set_verbose (guestfs_h *g, int v)
{
g->verbose = !!v;
return 0;
}
This changes these actions so they go indirectly via
some generated code, eg:
/* Generated */
int guestfs_set_verbose (guestfs_h *g,
int verbose)
{
return guestfs__set_verbose (g, verbose);
}
/* Non-generated */
int
guestfs__set_verbose (guestfs_h *g, int v)
{
g->verbose = !!v;
return 0;
}
The aim is to have a place in the generated code where
we can add debug or tracing information for these non-
daemon calls.
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The squashfs format changes too much. Use an ISO file for
the tests instead.
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* .gitmodules: New file, to track gnulib.
* .gnulib: Submodule directory.
* Makefile.am (EXTRA_DIST): Don't list config.rpath or
gitlog-to-changelog.
* autogen.sh: Adapt to use the new submodule.
* cfg.mk: New file.
(SUBDIRS): Add gnulib/lib and gnulib/tests.
(dist-hook): Reflect new location of getlog-to-changelog.
* configure.ac: Set build-aux/ as AUX_DIR.
Invoke gl_EARLY and gl_INIT.
(AC_CONFIG_FILES): Add gnulib/lib/Makefile and gnulib/tests/Makefile.
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This command detects the architecture of some types of binaries,
libraries, kernel modules and initrd images.
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This is an end-user testing tool, designed to test basic functionality
of libguestfs/qemu/kernel combination on the end-user's final host
machine.
It does not perform a thorough test, but should be enough to find
most booting issues.
Also this is intended to be used when reporting bugs.
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This script is just a simpler way to cat a file from a VM. It
is otherwise equivalent to using guestfish.
virt-cat someguest /etc/fstab
virt-cat someguest /var/log/messages | tail
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We have to include this generated file because it is part of
the build system, thus required to exist before the generator
runs.
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The use case is to have a long-running guestfish process in
a shell script, and thus to avoid the overhead of starting
guestfish each time. Do:
eval `guestfish --listen`
guestfish --remote somecmd
guestfish --remote someothercmd
guestfish --remote exit
This patch also supports having multiple guestfish processes
at the same time.
The protocol is simple XDR messages over a Unix domain socket.
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This commit adds six calls to support Linux extended attributes.
They are:
getxattrs list all extended attributes for a file or directory
setxattr add/replace an extended attribute
removexattr remove an extended attribute
lgetxattrs \
lsetxattr (same as above, but operate on symbolic links)
lremovexattr /
See attr(5) for more information.
This also adds support for the FBuffer field type, which maps to
an XDR opaque<> or a C (int, char *) pair.
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This patch also changes the way that the version is specified
in configure.ac. It is now made out of four parts (major, minor,
release and extra) and constructed for AC_INIT.
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Developers should put their custom parameters for configure/autogen.sh
into a script called ./localconfigure, and this script will be ignored
by git and the build system.
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This modifies the way that struct and struct lists are generated
(for return values) so that there is no need to add an explicit
new type when adding a new structure.
All tests pass, and the C API should be compatible.
I have also inspected the changes that are made to the generated
code by hand.
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These generated files were accidentally left in when we
removed the other generated files in cset
b3cb0b04eb2d38ba32c160a83d8e3894b376907b.
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Messages which include the proc_nr can now also include the
name of the actual function being called.
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This file is required by configure, so we need to add it so
it is available after the git checkout.
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This speeds up the generator greatly.
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Git users now require the OCaml compiler in order to regenerate
the generated code after a checkout.
Generated code will remain in the tarball, so users of the
source tarball will not need the OCaml compiler.
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This adds a readdir call (mostly intended for programs). The
return value is a list of guestfs_dirent structures.
This adds the new types 'struct guestfs_dirent' and
'struct guestfs_dirent_list', along with all the code to
return these in the different language bindings.
Also includes additional tests for OCaml and Perl bindings
to test this.
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Add 'initrd-list' command to list the files inside (new-style)
initrd images. Update virt-inspector to use this instead of
the less efficient download/unpack locally method.
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Large test files with standard content for the C API test, and
add a regression test for previous hexdump failure on large files.
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