#!/bin/sh

# RandomIdentificationGenerator.sh
# Wed Dec 24 11:10:24 PST 2008
# Chieh Cheng
# http://www.CynosureX.com/

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

  alphabet="A B C D E F G H I J K L M N O P Q R S T U V W X Y Z a b c d e f g h i j k l m n o p q r s t u v w x y z"

  countAlphabet ()
  {
    count=0
    for letter in $alphabet
    do
      count=`expr ${count} + 1`
    done
    return $count;
  }

  generateLetter ()
  {
    numOfLetters=$1
    letterPos=`Random.sh 1 ${numOfLetters}`
    return ${letterPos}
  }

  usage ()
  {
    scriptName=`basename "$0"`
    echo "  Usage:   ${scriptName} length"
  }

  if [ $# -eq 1 ]
  then
    length=$1
    current=0

    countAlphabet
    count=$?

    while [ ${current} -lt ${length} ]
    do
      generateLetter ${count}
      pos=$?
      letter=`echo "${alphabet}" | Token.sh ${pos}`
      printf "${letter}"
      current=`expr ${current} + 1`
    done

    echo
  else
    usage
  fi