jdk/test/java/io/PipedInputStream/ClosedWriter.java

/*
 * Copyright 1998 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

/*
 * @test
 * @bug 4130880
 * @summary reading inputstream from child process throws
 *          io exception: Write end dead
 *
 */

import java.io.*;

public class ClosedWriter implements Runnable {
    static PipedInputStream is;
    static PipedOutputStream os;

    public void run() {
        try {
            os.write(0);
            os.write(0);
            os.write(0);
            os.write(0);
            os.write(0);
            os.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) throws Exception {
        is = new PipedInputStream();
        os = new PipedOutputStream();
        is.connect(os);

        Thread t = new Thread(new ClosedWriter());
        t.start();

        // this should just exit cleanly but the bug causes an exception
        // to be thrown on the last read.
        while (is.read() != -1) {
        }
    }
}