Linux Basic — Sub-Menus

Sub-Menus

Nested menus let users drill into categories without cluttering the top-level menu. Each submenu should be a function that returns to the caller.

---

Example

config_menu() {
  options=("Set host" "Set port" "Back")
  PS3='config> '
  select opt in "${options[@]}"; do
    case "$REPLY" in
      1) read -rp "Host: " host; ;;
      2) read -rp "Port: " port; ;;
      3) break;;
      *) echo "invalid";;
    esac
  done
}

Because menus are functions, tests can call them with faked stdin.

---

Next → Dynamic Menus