diff -r eb491334113f -r 119ac9128c1b src/java.base/share/classes/sun/nio/ch/UnixDomainServerSocketChannelImpl.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/sun/nio/ch/UnixDomainServerSocketChannelImpl.java	Fri Oct 25 15:56:35 2019 +0100
@@ -0,0 +1,212 @@
+/*
+ * Copyright (c) 2000, 2019, 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 sun.nio.ch;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.net.SocketAddress;
+import java.net.SocketOption;
+import java.net.SocketTimeoutException;
+import java.net.StandardProtocolFamily;
+import java.net.StandardSocketOptions;
+import java.nio.channels.AlreadyBoundException;
+import java.nio.channels.AsynchronousCloseException;
+import java.nio.channels.ClosedChannelException;
+import java.nio.channels.IllegalBlockingModeException;
+import java.nio.channels.NotYetBoundException;
+import java.nio.channels.SelectionKey;
+import java.nio.channels.ServerSocketChannel;
+import java.nio.channels.SocketChannel;
+import java.nio.channels.UnixDomainSocketAddress;
+import java.nio.channels.spi.SelectorProvider;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Objects;
+import java.util.Set;
+import java.util.concurrent.locks.ReentrantLock;
+
+import sun.net.NetHooks;
+import sun.net.ext.ExtendedSocketOptions;
+
+/**
+ * An implementation of ServerSocketChannels
+ */
+
+public class UnixDomainServerSocketChannelImpl
+    extends ServerSocketChannelImpl
+{
+    static {
+        // register with InheritedChannel mechanism so it can create instances
+        // not yet sun.nio.ch.InheritedChannel.register(UnixDomainServerSocketChannelImpl::create);
+    }
+
+    public UnixDomainServerSocketChannelImpl(SelectorProvider sp) throws IOException {
+        super(sp, Net.unixDomainSocket());
+    }
+
+    public UnixDomainServerSocketChannelImpl(SelectorProvider sp, FileDescriptor fd, boolean bound)
+        throws IOException
+    {
+        super(sp, fd);
+        if (bound) {
+            synchronized (stateLock) {
+                localAddress = Net.localUnixAddress(fd);
+            }
+        }
+    }
+
+    @Override
+    public ServerSocket socket() {
+        throw new UnsupportedOperationException("socket not supported");
+    }
+
+    @Override
+    public <T> ServerSocketChannel setOption(SocketOption<T> name, T value)
+        throws IOException
+    {
+        Objects.requireNonNull(name);
+        if (!supportedOptions().contains(name))
+            throw new UnsupportedOperationException("'" + name + "' not supported");
+        if (!name.type().isInstance(value))
+            throw new IllegalArgumentException("Invalid value '" + value + "'");
+
+        synchronized (stateLock) {
+            ensureOpen();
+            // no options that require special handling
+            Net.setSocketOption(fd, Net.UNSPEC, name, value);
+            return this;
+        }
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public <T> T getOption(SocketOption<T> name)
+        throws IOException
+    {
+        Objects.requireNonNull(name);
+        if (!supportedOptions().contains(name))
+            throw new UnsupportedOperationException("'" + name + "' not supported");
+
+        synchronized (stateLock) {
+            ensureOpen();
+            // no options that require special handling
+            return (T) Net.getSocketOption(fd, Net.UNSPEC, name);
+        }
+    }
+
+    private static class DefaultOptionsHolder {
+        static final Set<SocketOption<?>> defaultOptions = defaultOptions();
+
+        private static Set<SocketOption<?>> defaultOptions() {
+            HashSet<SocketOption<?>> set = new HashSet<>();
+            set.add(StandardSocketOptions.SO_RCVBUF);
+            set.addAll(ExtendedSocketOptions.serverSocketOptions());
+            return Collections.unmodifiableSet(set);
+        }
+    }
+
+    @Override
+    public final Set<SocketOption<?>> supportedOptions() {
+        return DefaultOptionsHolder.defaultOptions;
+    }
+
+    @Override
+    public ServerSocketChannel bind(SocketAddress local, int backlog) throws IOException {
+        synchronized (stateLock) {
+            ensureOpen();
+            if (localAddress != null)
+                throw new AlreadyBoundException();
+            UnixDomainSocketAddress usa = Net.checkUnixAddress(local);
+            Net.unixDomainBind(fd, usa);
+            Net.listen(fd, backlog < 1 ? 50 : backlog);
+            localAddress = Net.localUnixAddress(fd);
+        }
+        return this;
+    }
+
+
+    @Override
+    int implAccept(FileDescriptor fd, FileDescriptor newfd, SocketAddress[] addrs)
+        throws IOException
+    {
+
+        return Net.unixDomainAccept(this.fd, newfd, addrs);
+    }
+
+    @Override
+    String getRevealedLocalAddressAsString(SocketAddress addr) {
+        // TODO
+        return addr.toString();
+    }
+
+    @Override
+    SocketAddress getRevealedLocalAddress(SocketAddress addr) {
+        return addr; // TODO
+    }
+
+    SocketChannel finishAccept(FileDescriptor newfd, SocketAddress isa)
+        throws IOException
+    {
+        try {
+            // newly accepted socket is initially in blocking mode
+            IOUtil.configureBlocking(newfd, true);
+            return new UnixDomainSocketChannelImpl(provider(), newfd, isa);
+        } catch (Exception e) {
+            nd.close(newfd);
+            throw e;
+        }
+    }
+
+    /**
+     * Returns the local address, or null if not bound
+     */
+    SocketAddress localAddress() {
+        synchronized (stateLock) {
+            return localAddress;
+        }
+    }
+
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append(this.getClass().getName());
+        sb.append('[');
+        if (!isOpen()) {
+            sb.append("closed");
+        } else {
+            synchronized (stateLock) {
+                UnixDomainSocketAddress addr = (UnixDomainSocketAddress)localAddress;
+                if (addr == null) {
+                    sb.append("unbound");
+                } else {
+                    sb.append(getRevealedLocalAddressAsString(addr));
+                }
+            }
+        }
+        sb.append(']');
+        return sb.toString();
+    }
+}