--- Net2/arch/i386/floppy/mount/mount.c	2018/04/24 18:04:01	1.1
+++ Net2/arch/i386/floppy/mount/mount.c	2018/04/24 18:05:33	1.1.1.2
@@ -45,20 +45,26 @@ main(argc, argv)
 	char **argv;
 {
 	struct ufs_args args;
+	int update =0;
 
 	if (*++argv && **argv == '-') {
-		err("no options available", 0);
-		_exit(1);
+		if (strcmp(*argv, "-u") == 0) {
+			update = MNT_UPDATE;
+			++argv; argc--;
+		} else {
+			err("option not available", 0);
+			_exit(1);
+		}
 	}
 	if (argc != 3) {
-		err("usage: mount dev dir", 0);
+		err("usage: mount [-u] dev dir", 0);
 		_exit(1);
 	}
 	args.fspec = argv[0];
 	args.exflags = 0;
 	args.exroot = DEFAULT_ROOTUID;;
 		
-	if (mount(MOUNT_UFS, argv[1], 0, &args)) {
+	if (mount(MOUNT_UFS, argv[1], update, &args)) {
 		err(argv[0], 1);
 		_exit(1);
 	}