1 /*

     2  * Copyright 2006 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 /*

    25  * A test for

    26  * 6469606: (process) Process.destroy() can kill wrong process (Unix)

    27  * that is not suitable for use as a regression test, because it must

    28  * create 32768 processes, and depends on perl.

    29  */

    30 import java.io.*;

    31 

    32 public class FeelingLucky {

    33 

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

    35         final Runtime rt = Runtime.getRuntime();

    36         final String[] pidPrinter = {"/bin/sh", "-c", "echo $$"};

    37         final Process minedProcess = rt.exec(pidPrinter);

    38         int minedPid = 0;

    39         final InputStream is = minedProcess.getInputStream();

    40         int c;

    41         while ((c = is.read()) >= '0' && c <= '9')

    42             minedPid = 10 * minedPid + (c - '0');

    43         System.out.printf("minedPid=%d%n", minedPid);

    44         minedProcess.waitFor();

    45 

    46         final String[] magnum = {

    47             "perl", "-e",

    48             "my $punk = getppid();" +

    49             "open TTY, '> /dev/tty';" +

    50             "print TTY \"punk=$punk\\n\";" +

    51             "for (my $i = 0; $i < 32768; $i++) {" +

    52             "  my $pid = fork();" +

    53             "  if ($pid == 0) {" +

    54             "    if ($$ == " + minedPid + ") {" +

    55             "      print TTY \"MATCH $$ $punk\\n\";" +

    56             "      $SIG{TERM} = sub {" +

    57             "        print TTY \"Got TERM $$ $punk\\n\";" +

    58             "        kill 9, $punk;" +

    59             "        exit; };" +

    60             "      $| = 1; print 'Go ahead.  Make my day.';" +

    61             "      sleep 100;" +

    62             "    }" +

    63             "    exit;" +

    64             "  } else { " +

    65             "    waitpid($pid,0);" +

    66             "    break if $pid == " + minedPid + ";" +

    67             "  }" +

    68             "}"

    69         };

    70 

    71         Process p = rt.exec(magnum);

    72         if (p.getInputStream().read() != -1) {

    73             System.out.println("got a char");

    74             minedProcess.destroy();

    75             Thread.sleep(1000);

    76         }

    77     }

    78 }