http://netty.io/netty-all/: Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers and clients. (The Netty Project) 
/*
 * Copyright 2015 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.channel.unix;

import io.netty.channel.Channel;


Channel that expose operations that are only present on UNIX like systems. 
/**
 * {@link Channel} that expose operations that are only present on {@code UNIX} like systems.
 */
public interface UnixChannel extends Channel {
    
Returns the FileDescriptor that is used by this Channel. 
/**
     * Returns the {@link FileDescriptor} that is used by this {@link Channel}.
     */
    FileDescriptor fd();
}