guestfs-ocaml - OCaml から libguestfs
を使用する方法
モジュール形式:
let g = Guestfs.create () in
Guestfs.add_drive_opts g ~format:"raw" ~readonly:true "disk.img";
Guestfs.launch g;
オブジェクト指向スタイル:
let g = new Guestfs.guestfs () in
g#add_drive_opts ~format:"raw" ~readonly:true "disk.img";
g#launch ();
ocamlfind opt prog.ml -package guestfs -linkpkg -o prog
or:
ocamlopt -I +guestfs mlguestfs.cmxa prog.ml -o prog
This manual page documents how to call libguestfs from the OCaml programming
language. This page just documents the differences from the C API and gives
some examples. If you are not familiar with using libguestfs, you also need to
read
guestfs(3).
There are two different programming styles supported by the OCaml bindings. You
can use a module style, with each C function mapped to an OCaml function:
int guestfs_set_verbose (guestfs_h *g, int flag);
becomes:
val Guestfs.set_verbose : Guestfs.t -> bool -> unit
Alternately you can use an object-oriented style, calling methods on the class
"Guestfs.guestfs":
method set_verbose : bool -> unit
The object-oriented style is usually briefer, and the minor performance penalty
isn't noticeable in the general overhead of performing libguestfs functions.
The handle is closed when it is reaped by the garbage collector. Because
libguestfs handles include a lot of state, it is also possible to close (and
hence free) them explicitly by calling "Guestfs.close" or the
"#close" method.
Errors from libguestfs functions are mapped into the "Guestfs.Error"
exception. This has a single parameter which is the error message (a string).
Calling any function/method on a closed handle raises
"Guestfs.Handle_closed". The single parameter is the name of the
function that you called.
@CREATE_DISK@
@INSPECT_VM@
@DEBUG_LOGGING@
guestfs(3),
guestfs-examples(3),
guestfs-erlang(3),
guestfs-gobject(3),
guestfs-golang(3),
guestfs-java(3),
guestfs-lua(3),
guestfs-perl(3),
guestfs-python(3),
guestfs-recipes(1),
guestfs-ruby(3),
http://libguestfs.org/,
http://caml.inria.fr/.
Richard W.M. Jones ("rjones at redhat dot com")
Copyright (C) 2010-2012 Red Hat Inc.
To get a list of bugs against libguestfs, use this link:
https://bugzilla.redhat.com/buglist.cgi?component=libguestfs&product=Virtualization+Tools
To report a new bug against libguestfs, use this link:
https://bugzilla.redhat.com/enter_bug.cgi?component=libguestfs&product=Virtualization+Tools
When reporting a bug, please supply:
- •
- The version of libguestfs.
- •
- Where you got libguestfs (eg. which Linux distro, compiled
from source, etc)
- •
- Describe the bug accurately and give a way to reproduce
it.
- •
- Run libguestfs-test-tool(1) and paste the
complete, unedited output into the bug report.