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/*
* 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]));
}
}
}
}
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