Fix banner

functions

@@ -2,6 +2,10 @@
 # Common functions for the lab scripts
 # Copyright 2021 Bryan C. Roessler
 
+# Don't run this script directly
+[[ "${BASH_SOURCE[0]}" == "${0}" ]] && exit 0
+
+
 ask_ok() {
     read -r -p "$* [y/N]" response
     response=${response,,}
@@ -15,6 +19,7 @@ is_root() {
     [[ $user != "root" ]] && echo "Script must be run with sudo rights!" && exit 1
 }
 
+
 if ! type -t readarray >/dev/null; then
   readarray() {
     local cmd opt t v=MAPFILE
@@ -48,4 +53,4 @@ if ! type -t readarray >/dev/null; then
       eval "${v}+=(\"$line\")"
     done
   }
-fi
+fi