#!/bin/sh

# Random.sh
# 2007-06-29
# Chieh Cheng
# http://www.CynosureX.com/

# GNU General Public License (GPL) Version 2, June 1991

scriptName=`echo $0 | sed s/\\\\/.*\\\\///g`

if [ $# -ne 2 ]
then
  echo "  Usage:   $scriptName \"begin num\" \"end num\""
else
  begin="$1"
  end="$2"

  number=${RANDOM:--1}

  if [ ${number} -eq -1 ]
  then
    if [ -a /dev/urandom ]
    then
      number=`dd if=/dev/urandom bs=1 count=4 2> /dev/null | od -t u4 | awk 'NR==1 {print $2}'`
#      number=`od -vAn -N4 -tu4 < /dev/urandom`
    else
      number=`awk 'BEGIN {srand();print rand()}'`
    fi
  fi

  range=`expr ${end} - ${begin} + 1`
  result=`expr ${number} % ${range} + ${begin}`

  echo ${result}
fi