🚀 use ftime to calculate run time

stl/file.nas

@@ -23,4 +23,14 @@ var file={
             eof:    func(){return io.eof(fd);}
         };
     }
-};
+};
+
+var find_all_files=func(path){
+    var dd=unix.opendir(path);
+    var res=[];
+    while(var n=unix.readdir(dd))
+        if(unix.isfile(path~"/"~n))
+            append(res,n);
+    unix.closedir(dd);
+    return res;
+}