Show the command's usage when no arguments are provided.

scripts/ybcon.sh

@@ -24,24 +24,28 @@ newArgs() {
   fi
 }
 
-for it in "$@"
-do
-  case "$it" in
-    -h | --help )
-      echo "Usage:"
-      usage
-      exit 0 ;;
-    -p | -printresult )
-      newArgs "$it"
-      shift ;;
-    *.ybcon )
-      newArgs "$it"
-      run=true
-      break ;;
-    * )
-      usage ;;
-  esac
-done
+if [ "$#" != 0  ]; then
+  for it in "$@"
+  do
+    case "$it" in
+      -h | --help )
+        echo "Usage:"
+        usage
+        exit 0 ;;
+      -p | -printresult )
+        newArgs "$it"
+        shift ;;
+      *.ybcon )
+        newArgs "$it"
+        run=true
+        break ;;
+      * )
+        usage ;;
+    esac
+  done
+else
+  usage
+fi
 
 runIt() { eval "$1" " $args"; }