--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/jdk/internal/access/JavaIOFileDescriptorAccess.java	Tue Nov 06 10:01:16 2018 -0800
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.internal.access;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+
+import jdk.internal.ref.PhantomCleanable;
+
+/*
+ * @author Chris Hegarty
+ */
+
+public interface JavaIOFileDescriptorAccess {
+    public void set(FileDescriptor fdo, int fd);
+    public int get(FileDescriptor fdo);
+    public void setAppend(FileDescriptor fdo, boolean append);
+    public boolean getAppend(FileDescriptor fdo);
+    public void close(FileDescriptor fdo) throws IOException;
+    public void registerCleanup(FileDescriptor fdo);
+    public void registerCleanup(FileDescriptor fdo, PhantomCleanable<FileDescriptor> cleanable);
+    public void unregisterCleanup(FileDescriptor fdo);
+
+    // Only valid on Windows
+    public void setHandle(FileDescriptor fdo, long handle);
+    public long getHandle(FileDescriptor fdo);
+}