Shell Programming and Scripting

#! /bin/ksh
#

menu () {
  clear

  echo "                                                         "
  echo "                Test script                              "
  echo "                                                         "

}

nofile () {
sudo -u root /app/first/test/$choice.sh
}

file () {
read filename?"   Please input filename: "
sudo -u root /app/first/test/$choice.sh $filename
}

menu
choice=0
while test "x $choice" = "x 0"
do
  read choice?"Chose one : "
      case $choice in
    bz11) file
    ;;
    bz12) file
    ;;
      E) exit
    ;;
    *) nfile
  ;;

  esac
choice=0
done

case $choice in
        [a-z][a-z][A-Z0-9][A-Z0-9]) file
        ;;
        E) exit
        ;;
        *) nfile
        ;;
esac