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 /* @test
  25    @bug 6176051
  26    @summary Check isFile's handling of Windows device names
  27  */
  28 
  29 import java.io.File;
  30 
  31 public class WinDeviceName {
  32     private static String devnames[] = {
  33         "CON", "PRN", "AUX", "NUL", "COM1", "COM2", "COM3", "COM4",
  34         "COM5", "COM6", "COM7", "COM8", "COM9", "LPT1", "LPT2",
  35         "LPT3", "LPT4", "LPT5", "LPT6", "LPT7", "LPT8", "LPT9",
  36         "CLOCK$"
  37     };
  38     public static void main(String[] args) throws Exception {
  39         String osName = System.getProperty("os.name");
  40         if (!osName.startsWith("Windows")) {
  41             return;
  42         }
  43         for (int i = 0; i < devnames.length; i++) {
  44             if (new File(devnames[i]).isFile() ||
  45                 new File(devnames[i] + ".txt").isFile()) {
  46                 if ("CLOCK$".equals(devnames[i]) &&
  47                     (osName.startsWith("Windows 9") ||
  48                      osName.startsWith("Windows Me"))) {
  49                     //"CLOCK$" is a reserved device name for NT
  50                     continue;
  51                 }
  52                 throw new Exception("isFile() returns true for Device name "
  53                                     +  devnames[i]);
  54             }
  55         }
  56     }
  57 }