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/*
* Copyright (c) 2003, 2011, 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
* @bug 4820217
* @summary Ensure that pending reads on stdout and stderr streams
* return -1 when the process is destroyed
*/
import java.io.*;
import java.util.concurrent.*;
public class StreamsSurviveDestroy {
private static class Copier extends Thread {
String name;
InputStream in;
OutputStream out;
boolean wantInterrupt;
boolean acceptException;
Exception exc = null;
CountDownLatch latch;
Copier(String name, InputStream in, OutputStream out,
boolean ae, boolean wi, CountDownLatch l)
{
this.name = name;
this.in = in;
this.out = out;
this.acceptException = ae;
this.wantInterrupt = wi;
this.latch = l;
setName(name);
start();
}
private void log(String s) {
System.err.println(" " + name + ": " + s);
}
public void run() {
byte[] buf = new byte[4242];
latch.countDown();
for (;;) {
try {
int n = in.read(buf);
if (n < 0) {
System.err.println(" EOF");
break;
}
out.write(buf, 0, n);
} catch (IOException x) {
if (wantInterrupt) {
if (x instanceof InterruptedIOException) {
log("Interrupted as expected");
return;
}
exc = new Exception(name
+ ": Not interrupted as expected");
return;
}
exc = x;
if (acceptException) {
log("Thrown, but okay: " + x);
return;
}
return;
}
}
}
public void check() throws Exception {
if (!acceptException && exc != null)
throw new Exception(name + ": Exception thrown", exc);
}
}
static void test() throws Exception {
CountDownLatch latch = new CountDownLatch(2);
System.err.println("test");
Process p = Runtime.getRuntime().exec(UnixCommands.cat());
Copier cp1 = new Copier("out", p.getInputStream(), System.err,
false, false, latch);
Copier cp2 = new Copier("err", p.getErrorStream(), System.err,
false, false, latch);
latch.await(); // Wait till both Copiers about to read
Thread.sleep(100);// Give both Copiers a chance to start read
p.destroy();
System.err.println(" exit: " + p.waitFor());
cp1.join();
cp1.check();
cp2.join();
cp2.check();
}
static void testCloseBeforeDestroy() throws Exception {
CountDownLatch latch = new CountDownLatch(2);
System.err.println("testCloseBeforeDestroy");
Process p = Runtime.getRuntime().exec(UnixCommands.cat());
Copier cp1 = new Copier("out", p.getInputStream(), System.err,
true, false, latch);
Copier cp2 = new Copier("err", p.getErrorStream(), System.err,
true, false, latch);
latch.await(); // Wait till both Copiers about to read
Thread.sleep(100);// Give both Copiers a chance to start read
p.getInputStream().close();
p.getErrorStream().close();
p.destroy();
System.err.println(" exit: " + p.waitFor());
cp1.join();
cp1.check();
cp2.join();
cp2.check();
}
static void testCloseAfterDestroy() throws Exception {
CountDownLatch latch = new CountDownLatch(2);
System.err.println("testCloseAfterDestroy");
Process p = Runtime.getRuntime().exec(UnixCommands.cat());
Copier cp1 = new Copier("out", p.getInputStream(), System.err,
true, false,latch);
Copier cp2 = new Copier("err", p.getErrorStream(), System.err,
true, false, latch);
latch.await(); // Wait till both Copiers about to read
Thread.sleep(100);// Give both Copiers a chance to start read
p.destroy();
p.getInputStream().close();
p.getErrorStream().close();
System.err.println(" exit: " + p.waitFor());
cp1.join();
cp1.check();
cp2.join();
cp2.check();
}
static void testInterrupt() throws Exception {
CountDownLatch latch = new CountDownLatch(2);
System.err.println("testInterrupt");
Process p = Runtime.getRuntime().exec(UnixCommands.cat());
Copier cp1 = new Copier("out", p.getInputStream(), System.err,
false, true, latch);
Copier cp2 = new Copier("err", p.getErrorStream(), System.err,
false, true, latch);
latch.await(); // Wait till both Copiers about to read
Thread.sleep(100);// Give both Copiers a chance to start read
cp1.interrupt();
cp2.interrupt();
Thread.sleep(100);
p.destroy();
System.err.println(" exit: " + p.waitFor());
cp1.join();
cp1.check();
cp2.join();
cp2.check();
}
public static void main(String[] args) throws Exception {
// Applies only to Solaris;
// Linux and Windows behave a little differently
if (! UnixCommands.isSunOS) {
System.out.println("For SunOS only");
return;
}
UnixCommands.ensureCommandsAvailable("cat");
test();
testCloseBeforeDestroy();
testCloseAfterDestroy();
testInterrupt();
}
}
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