2 .\" The Regents of the University of California. All rights reserved.
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, are permitted provided that the following conditions
7 .\" 1. Redistributions of source code must retain the above copyright
8 .\" notice, this list of conditions and the following disclaimer.
9 .\" 2. Redistributions in binary form must reproduce the above copyright
10 .\" notice, this list of conditions and the following disclaimer in the
11 .\" documentation and/or other materials provided with the distribution.
12 .\" 3. All advertising materials mentioning features or use of this software
13 .\" must display the following acknowledgment:
14 .\" This product includes software developed by the University of
15 .\" California, Berkeley and its contributors.
16 .\" 4. Neither the name of the University nor the names of its contributors
17 .\" may be used to endorse or promote products derived from this software
18 .\" without specific prior written permission.
20 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 .\" @(#)random.6 8.2 (Berkeley) 3/31/94
33 .\" $FreeBSD: src/games/random/random.6,v 1.8 2005/01/18 08:57:18 ru Exp $
34 .\" $DragonFly: src/games/random/random.6,v 1.3 2005/03/02 06:59:23 cpressey Exp $
41 .Nd random lines from a file or random numbers
49 has two distinct modes of operations.
50 The default is to read in lines
51 from the standard input and randomly write them out
52 to the standard output with a probability of
57 for this mode of operation is 2, giving each line a 50/50 chance of
60 The second mode of operation is to read in a file from
62 and randomize the contents of the file and send it back out to
64 The contents can be randomized based off of newlines or based off of
65 space characters as determined by
69 for this mode of operation is 1, which gives each line a chance to be
74 The options are as follows:
81 does not read or write anything, and simply exits with a random
88 option is used to specify the
91 Standard input is used if
96 Randomize the input via newlines (the default).
100 option guarantees that the output is unbuffered.
104 that it is okay for it to reuse any given line or word when creating a
109 not to select the same line or word from a file more than once (the
111 This does not guarantee uniqueness if there are two of the
112 same tokens from the input, but it does prevent selecting the same
113 token more than once.
115 Randomize words separated by
124 functionality to randomizing lines and words was added in 2003 by
125 .An "Sean Chittenden" Aq seanc@FreeBSD.org .
127 No index is used when printing out tokens from the list which
128 makes it rather slow for large files (10MB+).
130 files, however, it should still be quite fast and efficient.