Random
has two distinct modes of operations.
The default is to read lines from standard input and write them to standard
output with a probability of 1.0 /
denominator.
( denominator
is a real number greater than or equal to 1.0.)
The default
denominator
for this mode of operation is 2.0, giving each line a 50% chance of
being displayed.
The second mode of operation, selected with the
-f filename
option, reads the specified file and outputs the randomized contents to
standard output.
The contents can be randomized in units of lines (split on newline characters)
or in units of words (split on space characters as determined by
isspace(3).)
The default
denominator
for this mode of operation is 1.0, which displays every line.
The options are as follows:
|
| -e
|
| |
If the
-e
option is specified,
random
does not read or write anything, and simply exits with a random
exit value of 0 to
denominator
amp;- 1, inclusive.
In this mode,
denominator
must be less than or equal to 256.
|
| -f filename
|
| |
The
-f
option is used to specify the
filename
to read from.
Standard input is used if
filename
is
'-'.
|
| -l
|
| |
Randomize the input via newlines (the default).
|
| -r
|
| |
Do not buffer output.
|
| -U
|
| |
Reuse any given line or word when creating a randomized output.
|
| -u
|
| |
Do not 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 in the input.
|
| -w
|
| |
Randomize words separated by
isspace(3)
instead of newlines.
|
|
