.\" Copyright (c) 1994
.\"	The Regents of the University of California.  All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\"
.\"     @(#)random.6	8.2 (Berkeley) 3/31/94
.\" %FreeBSD: src/games/random/random.6,v 1.3.2.2 2001/08/16 10:08:23 ru Exp %
.\" $FreeBSD: doc/ja_JP.eucJP/man/man6/random.6,v 1.5 2001/07/29 05:15:25 horikawa Exp $
.\"
.Dd March 31, 1994
.Dt RANDOM 6
.Os
.Sh 名称
.Nm random
.Nd ファイルからのランダムな行選択、あるいは乱数
.Sh 書式
.Nm random
.Op Fl er
.Op Ar denominator
.Sh 解説
.Nm
は標準入力から行を読み込み、1/ 分母 (denominator) の確率で
標準出力にその行をコピーします。
.Ar denominator
のデフォルトの値は 2 です。
.Pp
オプションは以下の通りです。
.Bl -tag -width Ds
.It Fl e
.Fl e
オプションが指定されていると、
.Nm
は何も読み書きせず、 0 から
.Ar denominator
\&- 1 までの整数からランダムに選んだ値を返り値として
そのまま終了します。
.It Fl r
.Fl r
オプションは、出力がバッファリングされないことを保証します。
.El
.Sh 関連項目
.Xr fortune 6