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=head1 名前
guestfs-ocaml - OCaml から libguestfs を使用する方法
=head1 書式
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
=head1 説明
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 L<guestfs(3)>.
=head2 プログラミング形式
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 C<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.
=head2 ハンドルの閉じ方
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 C<Guestfs.close> or the C<#close>
method.
=head2 例外
Errors from libguestfs functions are mapped into the C<Guestfs.Error>
exception. This has a single parameter which is the error message (a
string).
Calling any function/method on a closed handle raises
C<Guestfs.Handle_closed>. The single parameter is the name of the function
that you called.
=head1 例: ディスクイメージの作成
@CREATE_DISK@
=head1 例: 仮想マシンのディスクイメージの検査
@INSPECT_VM@
=head1 例: デバッグおよびロギングの有効化
@DEBUG_LOGGING@
=head1 関連項目
L<guestfs(3)>, L<guestfs-examples(3)>, L<guestfs-erlang(3)>,
L<guestfs-gobject(3)>, L<guestfs-golang(3)>, L<guestfs-java(3)>,
L<guestfs-lua(3)>, L<guestfs-perl(3)>, L<guestfs-python(3)>,
L<guestfs-recipes(1)>, L<guestfs-ruby(3)>, L<http://libguestfs.org/>,
L<http://caml.inria.fr/>.
=head1 著者
Richard W.M. Jones (C<rjones at redhat dot com>)
=head1 COPYRIGHT
Copyright (C) 2010-2012 Red Hat Inc.
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