| /* |
| * Copyright (c) 2007, 2010, 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. |
| * |
| * 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. |
| */ |
| |
| /* |
| * @test |
| * @summary Sockets shouldn't be inherited when creating a child process |
| */ |
| import java.nio.ByteBuffer; |
| import java.nio.channels.*; |
| import java.net.*; |
| import java.io.*; |
| |
| public class SocketInheritance { |
| |
| /* |
| * Simple helper class to direct process output to the parent |
| * System.out |
| */ |
| static class IOHandler implements Runnable { |
| InputStream in; |
| |
| IOHandler(InputStream in) { |
| this.in = in; |
| } |
| |
| static void handle(InputStream in) { |
| IOHandler handler = new IOHandler(in); |
| Thread thr = new Thread(handler); |
| thr.setDaemon(true); |
| thr.start(); |
| } |
| |
| public void run() { |
| try { |
| byte b[] = new byte[100]; |
| for (;;) { |
| int n = in.read(b); |
| if (n < 0) return; |
| System.out.write(b, 0, n); |
| } |
| } catch (IOException ioe) { } |
| } |
| |
| } |
| |
| // connect to the given port |
| static SocketChannel connect(int port) throws IOException { |
| InetAddress lh = InetAddress.getByName("127.0.0.1"); |
| InetSocketAddress isa = new InetSocketAddress(lh, port); |
| return SocketChannel.open(isa); |
| } |
| |
| // simple child process that handshakes with the parent and then |
| // waits indefinitely until it is destroyed |
| static void child(int port) { |
| try { |
| connect(port).close(); |
| } catch (IOException x) { |
| x.printStackTrace(); |
| return; |
| } |
| |
| for (;;) { |
| try { |
| Thread.sleep(10*1000); |
| } catch (InterruptedException x) { } |
| } |
| } |
| |
| |
| // Creates a loopback connection. |
| // Forks process which should not inherit the sockets. |
| // Close the sockets, and attempt to re-bind the listener. |
| |
| static void start() throws Exception { |
| |
| // setup loopback connection |
| ServerSocketChannel ssc = ServerSocketChannel.open(); |
| ssc.socket().bind( new InetSocketAddress(0) ); |
| |
| int port = ssc.socket().getLocalPort(); |
| |
| SocketChannel sc1 = connect(port); |
| SocketChannel sc2 = ssc.accept(); |
| |
| // launch the child |
| String cmd = System.getProperty("java.home") + File.separator + "bin" + |
| File.separator + "java"; |
| String testClasses = System.getProperty("test.classes"); |
| if (testClasses != null) |
| cmd += " -cp " + testClasses; |
| cmd += " SocketInheritance -child " + port; |
| |
| Process p = Runtime.getRuntime().exec(cmd); |
| |
| IOHandler.handle(p.getInputStream()); |
| IOHandler.handle(p.getErrorStream()); |
| |
| // wait for child to connect |
| SocketChannel sc3 = ssc.accept(); |
| |
| // close sockets |
| sc1.close(); |
| sc2.close(); |
| sc3.close(); |
| ssc.close(); |
| |
| // re-bind the listener - if the sockets were inherited then |
| // this will fail |
| try { |
| ssc = ServerSocketChannel.open(); |
| ssc.socket().bind(new InetSocketAddress(port)); |
| ssc.close(); |
| } finally { |
| p.destroy(); |
| } |
| |
| } |
| |
| public static void main(String[] args) throws Exception { |
| if (!System.getProperty("os.name").startsWith("Windows")) |
| return; |
| |
| if (args.length == 0) { |
| start(); |
| } else { |
| if (args[0].equals("-child")) { |
| child(Integer.parseInt(args[1])); |
| } |
| } |
| } |
| } |