I needed to write a small shell script which would allow me to make some decision based on user choices. I needed the user to specify Yes, No or Cancel for an operation. The following piece of hack does the job well.
# define constants
declare -r TRUE=0
declare -r FALSE=1
# Prompt user, and read command line argument
read -p "$str " answer
# Handle the input we were given
case $answer in
[yY]* ) return $TRUE;;
[nN]* ) return $FALSE;;
[cC]* ) exit;;
* ) echo "Y - Yes, N - No, C - Cancel. Please choose valid option.";;
if user_choice "Execute Job 1? "; then
echo "Executing Job 1.."
if user_choice "Execute Job 2? "; then
echo "Executing Job 2.."
The following links were referred to achieve this little script: