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/*
* Copyright (c) 2013, 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 7147084
* @run main/othervm InheritIOEHandle
* @summary inherit IOE handles and MS CreateProcess limitations (kb315939)
*/
import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
public class InheritIOEHandle {
private static enum APP {
A, B, C;
}
private static File stopC = new File("StopC.txt");
private static String SIGNAL = "After call child process";
private static String JAVA_EXE = System.getProperty("java.home")
+ File.separator + "bin"
+ File.separator + "java";
private static String[] getCommandArray(String processName) {
String[] cmdArray = {
JAVA_EXE,
"-cp",
System.getProperty("java.class.path"),
InheritIOEHandle.class.getName(),
processName
};
return cmdArray;
}
public static void main(String[] args) throws Exception {
if (!System.getProperty("os.name").startsWith("Windows")) {
return;
}
APP app = (args.length > 0) ? APP.valueOf(args[0]) : APP.A;
switch (app) {
case A:
performA();
break;
case B:
performB();
break;
case C:
performC();
break;
}
}
private static void performA() {
try {
stopC.delete();
ProcessBuilder builder = new ProcessBuilder(
getCommandArray(APP.B.name()));
builder.redirectErrorStream(true);
Process process = builder.start();
process.getOutputStream().close();
process.getErrorStream().close();
boolean isSignalReceived = false;
try (BufferedReader in = new BufferedReader(new InputStreamReader(
process.getInputStream(), "utf-8")))
{
String result;
while ((result = in.readLine()) != null) {
if (SIGNAL.equals(result)) {
isSignalReceived = true;
break;
} else {
throw new RuntimeException("Catastrophe in process B! Bad output.");
}
}
}
if (!isSignalReceived) {
throw new RuntimeException("Signal from B was not received");
}
// If JDK-7147084 is not fixed that point is unreachable.
System.out.println("Received signal from B, creating file StopC");
// write signal file
boolean isFileStopC = stopC.createNewFile();
if (!isFileStopC) {
throw new RuntimeException("Signal file StopC.txt was not created. TEST or INFRA bug");
}
process.waitFor();
System.err.println("Read stream finished.");
} catch (IOException ex) {
throw new RuntimeException("Catastrophe in process A!", ex);
} catch (InterruptedException ex) {
throw new RuntimeException("A was interrupted while waiting for B", ex);
}
}
private static void performB() {
try {
ProcessBuilder builder = new ProcessBuilder(
getCommandArray(APP.C.name()));
Process process = builder.start();
process.getInputStream().close();
process.getOutputStream().close();
process.getErrorStream().close();
System.out.println(SIGNAL);
process.waitFor();
// JDK-7147084 subject:
// Process C inherits the [System.out] handle and
// handle close in B does not finalize the streaming for A.
// (handle reference count > 1).
} catch (IOException ex) {
throw new RuntimeException("Catastrophe in process B!", ex);
} catch (InterruptedException ex) {
throw new RuntimeException("B was interrupted while waiting for C", ex);
}
}
private static void performC() {
// If JDK-7147084 is not fixed the loop is 5min long.
for (int i = 0; i < 5 * 60; ++i) {
try {
Thread.sleep(1000);
} catch (InterruptedException ex) {
// that is ok. Longer sleep - better effect.
}
// check for success
if (stopC.exists()) {
break;
}
}
}
}
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