Menu in Bash

menu.sh

#!/bin/bash
# A menu driven shell script sample template
## ----------------------------------
# Step #1: Define variables
# ----------------------------------

EDITOR=vim
PASSWD=/etc/passwd
RED='\033[0;41;30m'
STD='\033[0;0;39m'

# ----------------------------------
# Step #2: User defined function
# ----------------------------------

one(){
   echo 'one() function called'
        pause
}

two(){
   echo 'two() function called'
        pause
}

pause(){
   read -p "Press [ENTER] key to continue...." fackEnterKey
}


show_menu(){
    clear
    echo '~~~~~~~~~~~~~~~~~~~~~~~~~~~~'
    echo '~~~~~~~~~~MAIN-MENU~~~~~~~~~'
    echo '~~~~~~~~~~~~~~~~~~~~~~~~~~~~'
    echo '1 .Set Terminal'
    echo '2. Reset Terminal'
    echo '3 .Exit Terminal'
}

read_options(){
     local choice
     read -p "Enter your choice [1-3] : " choice
     case  $choice in
          1) one;;
          2) two;;
          3) exit 0;;
          *) echo -e "${RED}Error...${STD}" && sleep 2
     esac

}

# ----------------------------------------------
# Step #3: Trap CTRL+C, CTRL+Z and quit singles
# ----------------------------------------------
trap '' SIGINT SIGQUIT SIGTSTP


# -----------------------------------
# Step #4: Main logic - infinite loop
# ------------------------------------
while true
do
   show_menu
   read_options
done