1 /* 2 * Copyright (c) 2006, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * 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 main(String[] args)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 } 79