#!/bin/bash
# Copyright 2005 Daniel Cer (daniel.cer@cs.colorado.edu)
#
# This work is licensed under the Creative Commons Attribution-NonCommercial-
# ShareAlike License. To view a copy of this license, visit 
# http://creativecommons.org/licenses/by-nc-sa/2.5/ or send a letter to 
# Creative Commons, 543 Howard Street, 5th Floor, San Francisco, California, 
# 94105, USA.

randu_state=1
function randu { randu_state=$[(65539*$randu_state)%(2**31)]; 
  randu_ret=$randu_state; }

if [ $# -ne 1 ]; then
  echo -e "Usage:\n\t$0 (number of random values to generate*)" >&2
  echo -e "\n* '0' -> unlimited" >&2; exit -1; fi

max_iters=$1

if [ `bc<<<"$max_iters + $max_iters >= $max_iters"` -ne 1 ]; then
  echo "Error: parameter must be a natural number"; exit -2; fi

for ((i=0; i<max_iters||!max_iters; i++)); do randu; echo $randu_ret; done