/*

 * Copyright (c) 2012, 2019, 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 4244896

 * @summary Test for the various platform specific implementations of

 *          destroyForcibly.

 */

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.io.InputStreamReader;

abstract class ProcessTest implements Runnable {

    ProcessBuilder bldr;

    Process p;

    public void run() {

        try {

            String line;

            BufferedReader is =

                new BufferedReader(new InputStreamReader(p.getInputStream()));

            while ((line = is.readLine()) != null)

                System.err.println("ProcessTrap: " + line);

        } catch(IOException e) {

            if (!e.getMessage().matches("[Ss]tream [Cc]losed")) {

                throw new RuntimeException(e);

            }

        }

    }

    public void runTest() throws Exception {

        // The destroy() method is not tested because

        // the process streams are closed by the destroy() call.

        // After a destroy() call, the process terminates with a

        // SIGPIPE even if it was trapping SIGTERM.

        // So skip the trap test and go straight to destroyForcibly().

        p.destroyForcibly();

        p.waitFor();

        if (p.isAlive())

            throw new RuntimeException("Problem terminating the process.");

    }

}

class UnixTest extends ProcessTest {

    public UnixTest(File script) throws IOException {

        script.deleteOnExit();

        createScript(script);

        bldr = new ProcessBuilder(script.getCanonicalPath());

        bldr.redirectErrorStream(true);

        bldr.directory(new File("."));

        p = bldr.start();

    }

    void createScript(File processTrapScript) throws IOException {

        processTrapScript.deleteOnExit();

        try (FileWriter fstream = new FileWriter(processTrapScript);

             BufferedWriter out = new BufferedWriter(fstream)) {

            out.write("#!/bin/bash\n" +

                "echo \\\"ProcessTrap.sh started\\\"\n" +

                "while :\n" +

                "do\n" +

                "    sleep 1;\n" +

                "done\n");

        }

        processTrapScript.setExecutable(true, true);

    }

}

class WindowsTest extends ProcessTest {

    public WindowsTest() throws IOException {

        bldr = new ProcessBuilder("ftp");

        bldr.redirectErrorStream(true);

        bldr.directory(new File("."));

        p = bldr.start();

    }

}

public class DestroyTest {

    public static ProcessTest getTest() throws Exception {

        String osName = System.getProperty("os.name");

        if (osName.startsWith("Windows")) {

            return new WindowsTest();

        } else {

            File userDir = new File(System.getProperty("user.dir", "."));

            File tempFile = File.createTempFile("ProcessTrap-", ".sh", userDir);

            if (osName.startsWith("Linux")

                    || osName.startsWith("Mac OS")

                    || osName.equals("SunOS")

                    || osName.equals("AIX")) {

                return new UnixTest(tempFile);

            }

        }

        return null;

    }

    public static void main(String args[]) throws Exception {

        ProcessTest test = getTest();

        if (test == null) {

            throw new RuntimeException("Unrecognised OS");

        } else {

            new Thread(test).start();

            Thread.sleep(1000);

            test.runTest();

        }

    }

}