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Fixed SYNOPSIS.

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Expanded stdin/stdout definitions.
Ordered the SEE ALSO references.
Moved some chat from the BUGS section to freebsd-chat@.
Removed ``cvs log'' material from the HISTORY section.
This commit is contained in:
Ruslan Ermilov 2003-02-23 01:44:14 +00:00
parent 8b6eff89b0
commit 2bee685c4a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=111279
1 changed files with 27 additions and 21 deletions
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48
games/random/random.6
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@ -40,13 +40,15 @@
.Nd random lines from a file or random numbers
.Sh SYNOPSIS
.Nm
.Op Fl er
.Op Fl elrUuw
.Op Fl f Ar filename
.Op Ar denominator
.Sh DESCRIPTION
.Nm Random
has two distinct modes of operations. The default is to read in lines
from stdin and randomly write them out to stdout with a probability of
has two distinct modes of operations.
The default is to read in lines
from the standard input and randomly write them out
to the standard output with a probability of
1 /
.Ar denominator .
The default
@ -56,7 +58,8 @@ being displayed.
.Pp
The second mode of operation is to read in a file from
.Ar filename
and randomize the contents of the file and send it back out to stdout.
and randomize the contents of the file and send it back out to
standard output.
The contents can be randomized based off of newlines or based off of
space characters as determined by
.Xr isspace 3 .
@ -83,41 +86,44 @@ The
.Fl f
option is used to specify the
.Ar filename
to read from. stdin is used if the filename is set to "-".
to read from.
Standard input is used if
.Ar filename
is set to
.Sq Fl .
.It Fl l
Randomize the input via newlines (the default).
.It Fl r
The
.Fl r
option guarantees that the output is unbuffered.
.It Fl u
Tells
.Xr random 6
not to select the same line or word from a file more than once (the
default). This does not guarantee uniqueness if there are two of the
same tokens from the input, but it does prevent selecting the same
token more than once.
.It Fl U
Tells
.Xr random 6
that it is okay for it to reuse any given line or word when creating a
randomized output.
.It Fl u
Tells
.Xr random 6
not to select the same line or word from a file more than once (the
default).
This does not guarantee uniqueness if there are two of the
same tokens from the input, but it does prevent selecting the same
token more than once.
.It Fl w
Randomize words separated by
.Xr isspace 3
instead of newlines.
.El
.Sh SEE ALSO
.Xr fortune 6 ,
.Xr random 3
.Xr random 3 ,
.Xr fortune 6
.Sh BUGS
There is no index used when printing out tokens from the list which
makes rather slow for large files (10MB+). If this were used in
performance sensitive areas, I'd do something about it. For smaller
No index is used when printing out tokens from the list which
makes it rather slow for large files (10MB+).
For smaller
files, however, it should still be quite fast and efficient.
.Sh HISTORY
Original
.Xr random 6
game was brought in from BSD 4.4 Lite by jkh in 1994. The
The
functionality to randomizing lines and words was added in 2003 by
seanc.
.An "Sean Chittenden" Aq seanc@FreeBSD.org .