UNIX for Dummies Questions & Answers

#!/usr/bin/bash

INPUTFILE=file1

Site_Menu()
{
  SITE=${1}

  HOSTS="DUMMY `grep \"^|${SITE}|\" ${INPUTFILE} | cut -f3 -d\"|\" | sort -u`"
  typeset -i NUMHOSTS
  ((NUMHOSTS=`echo ${HOSTS} | wc -w`-1))
  HOSTARRAY=(${HOSTS})

  CHOICE="-1"
  while [ ${CHOICE} -ne 0 ]
  do
    tput clear
    tput cup 0 0
    echo -n "Menu for site: ${SITE}"
    ROW=2
    COL=0

    tput cup ${ROW} ${COL}
    echo "0. Back"

    INDEX=1
    while [ ${INDEX} -le ${NUMHOSTS} ]
    do
      ((COL=${COL}+20))
      if [ ${COL} -eq 80 ]
      then
        ((ROW=${ROW}+1))
        COL=0
      fi

      tput cup ${ROW} ${COL}
      echo -n "${INDEX}. ${HOSTARRAY[${INDEX}]}"
      ((INDEX=${INDEX}+1))
    done

    ((ROW=${ROW}+2))
    COL=0
    tput cup ${ROW} ${COL}

    echo -n "Enter your choice: "
    read CHOICE

    if [ ${CHOICE} -gt 0 -a ${CHOICE} -le ${NUMHOSTS} ]
    then
      ssh user@${HOSTARRAY[${CHOICE}]}
    fi
  done
}

#Main
SITES="DUMMY `cut -f2 -d"|" ${INPUTFILE} | sort -u`"
typeset -i NUMSITES
((NUMSITES=`echo ${SITES} | wc -w`-1))
SITEARRAY=(${SITES})

CHOICE="-1"
while [ ${CHOICE} -ne 0 ]
do
  tput clear
  tput cup 0 0
  echo -n "Main Menu"
  ROW=2
  COL=0

  tput cup ${ROW} ${COL}
  echo "0. Done"

  INDEX=1
  while [ ${INDEX} -le ${NUMSITES} ]
  do
    ((COL=${COL}+20))
    if [ ${COL} -eq 80 ]
    then
      ((ROW=${ROW}+1))
      COL=0
    fi

    tput cup ${ROW} ${COL}
    echo -n "${INDEX}. ${SITEARRAY[${INDEX}]}"
    ((INDEX=${INDEX}+1))
  done

  ((ROW=${ROW}+2))
  COL=0
  tput cup ${ROW} ${COL}

  echo -n "Enter your choice: "
  read CHOICE

  if [ -z ${CHOICE} ]
  then
    CHOICE=-1
  fi

  if [ ${CHOICE} -gt 0 -a ${CHOICE} -le ${NUMSITES} ]
  then
    Site_Menu ${SITEARRAY[${CHOICE}]}
    CHOICE=-1
  fi
done