Added sys_rename

modules/src/system/rename.c

@@ -0,0 +1,15 @@
+/*
+ * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
+ * See the copyright notice in the ACK home directory, in the file "Copyright".
+ */
+/* $Header$ */
+
+int
+sys_rename(path1, path2)
+	char *path1, *path2;
+{
+	unlink(path2);
+	return	link(path1, path2) == 0 &&
+		unlink(path1) == 0;
+}
+