1 /*
   2  * Copyright (c) 2002, 2010, 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 /* @test
  25  * @bug 4750978
  26  * @run main/othervm/timeout=300 ExecWithDir
  27  * @summary Ensure that we can fork-and-exec repeatedly when a new working
  28  *          directory is specified
  29  */
  30 
  31 import java.io.File;
  32 
  33 public class ExecWithDir {
  34 
  35     private static final int N = 500;
  36 
  37     public static void main(String args[]) throws Exception {
  38         if (! UnixCommands.isUnix) {
  39             System.out.println("For UNIX only");
  40             return;
  41         }
  42         UnixCommands.ensureCommandsAvailable("true");
  43 
  44         final String trueCmd = UnixCommands.findCommand("true");
  45         File dir = new File(".");
  46         for (int i = 1; i <= N; i++) {
  47             System.out.print(i);
  48             System.out.print(" e");
  49             Process p = Runtime.getRuntime().exec(trueCmd, null, dir);
  50             System.out.print('w');
  51             int s = p.waitFor();
  52             System.out.println("x " + s);
  53             if (s != 0) throw new Error("Unexpected return code " + s);
  54 
  55             // Avoid "Too many open files"
  56             p.getInputStream().close();
  57             p.getOutputStream().close();
  58             p.getErrorStream().close();
  59         }
  60     }
  61 }