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.\" ========================================================================
.\"
.IX Title "guestfs-erlang 3"
.TH guestfs-erlang 3 "2022-11-28" "libguestfs-1.48.6" "Virtualization Support"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "名前"
.IX Header "名前"
guestfs-erlang \- Erlang から libguestfs を使用する方法
.SH "書式"
.IX Header "書式"
.Vb 6
\& {ok, G} = guestfs:create(),
\& ok = guestfs:add_drive_opts(G, Disk,
\&                             [{format, "raw"}, {readonly, true}]),
\& ok = guestfs:launch(G),
\& [Device] = guestfs:list_devices(G),
\& ok = guestfs:close(G).
.Ve
.SH "説明"
.IX Header "説明"
This manual page documents how to call libguestfs from the Erlang programming language.  This page just documents the differences from the C \s-1API\s0 and gives some examples.  If you are not familiar with using libguestfs, you also need to read \fBguestfs\fR\|(3).
.SS "ハンドルのオープン方法およびクローズ方法"
.IX Subsection "ハンドルのオープン方法およびクローズ方法"
The Erlang bindings are implemented using an external program called \f(CW\*(C`erl\-guestfs\*(C'\fR.  This program must be on the current \s-1PATH,\s0 or else you should specify the full path to the program:
.PP
.Vb 1
\& {ok, G} = guestfs:create().
\&
\& {ok, G} = guestfs:create("/path/to/erl\-guestfs").
.Ve
.PP
\&\f(CW\*(C`G\*(C'\fR は他の関数に渡す libguestfs ハンドルです。
.PP
ハンドルを閉じるには:
.PP
.Vb 1
\& ok = guestfs:close(G).
.Ve
.SS "オプション引数を用いた機能"
.IX Subsection "オプション引数を用いた機能"
For functions that take optional arguments, the first arguments are the non-optional ones.  The last argument is a list of tuples supplying the remaining optional arguments.
.PP
.Vb 2
\& ok = guestfs:add_drive_opts(G, Disk,
\&                             [{format, "raw"}, {readonly, true}]).
.Ve
.PP
最後の引数が空の一覧ならば、それを省略できます:
.PP
.Vb 1
\& ok = guestfs:add_drive_opts(G, Disk).
.Ve
.SS "返り値およびエラー"
.IX Subsection "返り値およびエラー"
On success, most functions return a \f(CW\*(C`Result\*(C'\fR term (which could be a list, string, tuple etc.).  If there is nothing for the function to return, then the atom \f(CW\*(C`ok\*(C'\fR is returned.
.PP
エラーが発生すると、以下の組のどれかが表示されます:
.ie n .IP """{error, Msg, Errno}""" 4
.el .IP "\f(CW{error, Msg, Errno}\fR" 4
.IX Item "{error, Msg, Errno}"
これは関数からの通常のエラーを意味します。
.Sp
\&\f(CW\*(C`Msg\*(C'\fR はエラーメッセージ（文字列）です。\f(CW\*(C`Errno\*(C'\fR は Unix エラー（整数）です。
.Sp
\&\f(CW\*(C`Errno\*(C'\fR は 0 の可能性があります。 \*(L"guestfs_last_errno\*(R" in \fBguestfs\fR\|(3) 参照。
.ie n .IP """{unknown, Function}""" 4
.el .IP "\f(CW{unknown, Function}\fR" 4
.IX Item "{unknown, Function}"
This indicates that the function you called is not known.  Generally this means you are mixing \f(CW\*(C`erl\-guestfs\*(C'\fR from another version of libguestfs, which you should not do.
.Sp
\&\f(CW\*(C`Function\*(C'\fR は未知の関数の名前です。
.ie n .IP """{unknownarg, Arg}""" 4
.el .IP "\f(CW{unknownarg, Arg}\fR" 4
.IX Item "{unknownarg, Arg}"
This indicates that you called a function with optional arguments, with an unknown argument name.
.Sp
\&\f(CW\*(C`Arg\*(C'\fR は未知の引数の名前です。
.SH "例 1: ディスクイメージの作成"
.IX Header "例 1: ディスクイメージの作成"
\&\f(CW@EXAMPLE1\fR@
.SH "例 2: 仮想マシンのディスクイメージの検査"
.IX Header "例 2: 仮想マシンのディスクイメージの検査"
\&\f(CW@EXAMPLE2\fR@
.SH "関連項目"
.IX Header "関連項目"
\&\fBguestfs\fR\|(3), \fBguestfs\-examples\fR\|(3), \fBguestfs\-gobject\fR\|(3), \fBguestfs\-golang\fR\|(3), \fBguestfs\-java\fR\|(3), \fBguestfs\-lua\fR\|(3), \fBguestfs\-ocaml\fR\|(3), \fBguestfs\-perl\fR\|(3), \fBguestfs\-python\fR\|(3), \fBguestfs\-recipes\fR\|(1), \fBguestfs\-ruby\fR\|(3), http://www.erlang.org/. http://libguestfs.org/.
.SH "著者"
.IX Header "著者"
Richard W.M. Jones (\f(CW\*(C`rjones at redhat dot com\*(C'\fR)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (C) 2011\-2012 Red Hat Inc.
.SH "LICENSE"
.IX Header "LICENSE"
.SH "BUGS"
.IX Header "BUGS"
To get a list of bugs against libguestfs, use this link:
https://bugzilla.redhat.com/buglist.cgi?component=libguestfs&product=Virtualization+Tools
.PP
To report a new bug against libguestfs, use this link:
https://bugzilla.redhat.com/enter_bug.cgi?component=libguestfs&product=Virtualization+Tools
.PP
When reporting a bug, please supply:
.IP "\(bu" 4
The version of libguestfs.
.IP "\(bu" 4
Where you got libguestfs (eg. which Linux distro, compiled from source, etc)
.IP "\(bu" 4
Describe the bug accurately and give a way to reproduce it.
.IP "\(bu" 4
Run \fBlibguestfs\-test\-tool\fR\|(1) and paste the \fBcomplete, unedited\fR
output into the bug report.