the while(1) inside the awk script will make it generate random numbers until hell freezes, is that needed at all to fill byteone and bytetwo?
Piping into a while loop executing in a subshell will not make the variables available in the parent shell. If you want to use those, a different mechanism is needed.
In some awks, calling srand() is pointless as it preseeds the random generator from the system clock which is done when awk starts anyway.
So, although some people in these fora rant about one liners - just kidding - you might want to consider this:
Except that I tried removing while(1) , (I assumed while(true) ) and it disabled the Ctrl-C on this MBP. I could not exit the program.
I will stick up for Don here it worked perfectly for my needs but I will try your method and see how it works, watch this space...
Hi,
I am having trouble with generating random numbers. can this be done with awk?
So I have a file that looks like this:
23 30
24 40
26 34
So column1 is start and column2 is end. I want to generate 3 random #'s between start and stop:
So the output will look like this:
... (9 Replies)
Im new to C, and Im having a hard time getting a random number.
In bash, I would do something similar to the following to get a random number;
#!/bin/bash
seed1=$RANDOM
seed2=$RANDOM
seed3=$RANDOM
SEED=`expr $seed1 * $seed2 / $seed3`
echo ${SEED%.*}
Now, in online examples... (4 Replies)
Hello All, I am stuck up in a program where the rand functions ends up giving all the same integers. Tried sleep, but the numbers turned out to be same... Can anyone help me out how to fix this issue ? I have called the srand once in the program, but I feel like when I call fork the child process... (5 Replies)
Hi there I am trying to generate a random number between 40 and 70 using the shell here is my code so far and it keeps going above 70. all help much appreciated!
comp=$(( RANDOM%70+40 ))
echo $comp (4 Replies)
Having a hard time with this. Very new to scripting and linux. Spent all sunday trying to do this. Appreciate some help and maybe help breaking down what the syntax does.
Create a Bash program. It should have the following properties
• Creates a secret number between 1 and 100
i. The... (3 Replies)
Hi,
How can I generate a string of random characters (alpha+numeric) of a particular length ?
For e.g. for
n=5, output = 'kasjf'
n=10, output = 'hedbcd902k'
Also, please let me know if random (valid) dates could also be generated.
Thanks (7 Replies)
Hi all...
Apologies for any typos, etc...
This took a while but it didn't beat me...
Although there are many methods of generating random numbers in a POSIX shell this uses integer maths and a simple C source to create an executable to get epoch to microseconds accuracy if it is needed. I take... (8 Replies)
Discussion started by: wisecracker
8 Replies
LEARN ABOUT NETBSD
shuffle
SHUFFLE(1) BSD General Commands Manual SHUFFLE(1)NAME
shuffle -- print a random permutation of the command line arguments
SYNOPSIS
shuffle [-0] [-f filename ...] [-n number] [-p number] [arg] [...]
DESCRIPTION
The shuffle program prints a random permutation (or ``shuffle'') of its command line arguments. This can be useful in shell scripts for
selecting a random order in which to do a set of tasks, view a set of files, etc.
If the -f option is given, the data is taken from that files' contents or if the filename is - ``stdin''.
If the -n option is given, its argument is treated as a number, and the program prints a random permutation of the numbers greater than or
equal to 0 and less than the argument.
If the -p option is given, its argument is treated as a number, and the program prints that number of randomly selected lines or arguments in
a random order.
The -0 option changes the field separator character from
to , so that the output is suitable to be sent to xargs(1) (to handle filenames
with whitespace in them).
EXAMPLES
$ shuffle a b c d
c
b
d
a
$ shuffle -p 1 a b c d
d
$ shuffle -n 4 -p 2
0
3
SEE ALSO jot(1), random(6)HISTORY
The shuffle program first appeared in NetBSD 1.4.
AUTHORS
Written by Perry E. Metzger <perry@piermont.com>.
BSD February 18, 2009 BSD