Yes No

These scripts will ask you for one of two replies and will not continue until you give one or the other.

Method 1

This script uses an if statement:

#!/bin/bash
JOB () {
	echo -n "Do you wish to take that action? (y/n)";
	read -n1 response
	echo;
	if
		[ "$response" = "y" ];
	then
		echo "You chose yes.";
	elif
		[ "$response" = "n" ];
	then
		echo "You chose no.";
	else
		JOB;
	fi;
	}
JOB;

This script uses a case statement:

#!/bin/bash
JOB () {
	echo -n "Do you wish to take that action? (y/n)";
	read -n1 response
	echo;
	case "$response" in
		y) echo "You chose yes."
		;;
		n) echo "You chose no."
		;;
		*) JOB;
		;;
	esac;
	}
JOB;

Method 2

This script uses an if statement:

#!/bin/bash
JOB () {
	read -s -n1 -p "Do you wish to do that? (y/n)" response;
	echo;
	if
		[ "$response" = "y" ];
	then
		echo "You chose yes.";
	elif
		[ "$response" = "n" ];
	then
		echo "You chose no.";
	else
		JOB;
	fi;
	}
JOB;

This script uses a case statement:

#!/bin/bash
JOB () {
	read -s -n1 -p "Do you wish to do that? (y/n)" response;
	echo;
	case "$response" in
		y) echo "You chose yes."
		;;
		n) echo "You chose no."
		;;
		*) JOB;
		;;
	esac;
	}
JOB;

Obligatory Happy Ending

And they all lived happily ever after. The end.