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#!/bin/sh
banner() {
echo "Use one of the following options:"
echo " d: To display today's date and present time"
echo " l: To see the listing of files in your present working directory"
echo " w: To see who's logged in"
echo " q: To quit this program"
echo "Enter your option and hit <Enter>:"
}
quit() {
exit 0
}
list() {
ls
}
print_date() {
date
}
logged_in() {
who
}
menu() {
read option
case "$option" in
d) print_date
;;
l) list
;;
w) logged_in
;;
q) quit
;;
esac
}
main() {
while true; do
banner
menu
done
quit
}
main
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