#!/bin/bash

# This file uses the until statment to create a simple menu
# to prompt user for a selection. The selection 6 will exit
# the menu (script) - error checking for invalid numbers
# is not present (see until_2)

# Notice std error from test command redirected
# to /dev/null - try to press ENTER

num=1
until [ $num = 6 ] 2> /dev/null  # Prevents "test errors"
do
	printf "\n\t\tMENU\n"
	printf "\t1. Add a File\n\t2. Change a File\n\t3. Delete a File\n"
	printf "\t4. Print a File\n\t5. Update Records\n\t6. Exit\n\n"
	printf "\tPlease make a selection >> "

# Notice how selection is read BEFORE error checking
	
	read num
	while [ $num -lt 1 -o $num -gt 6 ] 2> /dev/null # prevent "test error"
	do
		echo
		echo -n "Invalid Number - Please Re-enter >> "
		read num
	done
done