print a message if neither start nor stop is specified

4e028a06 · Brian Wellington · 74da616f · 4e028a06
Commit 4e028a06 authored Jun 07, 2000 by Brian Wellington
--- a/bin/tests/system/ifconfig.sh
+++ b/bin/tests/system/ifconfig.sh
@@ -92,4 +92,8 @@ case "$1" in
 		esac
 	done
 	;;
+	*)
+		echo "Usage: $0 {start|stop}"
+		exit 1
 esac