1 /*

     2  * Copyright (c) 2008, 2009, 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 4313887 6838333 6863864

    26  * @summary Unit test for java.nio.file.Path createSymbolicLink,

    27  *     readSymbolicLink, and createLink methods

    28  * @library ..

    29  * @build Links

    30  * @run main/othervm Links

    31  */

    32 

    33 import java.nio.file.*;

    34 import java.nio.file.attribute.*;

    35 import java.io.*;

    36 

    37 public class Links {

    38 

    39     static final boolean isWindows =

    40         System.getProperty("os.name").startsWith("Windows");

    41 

    42     static void assertTrue(boolean okay) {

    43         if (!okay)

    44             throw new RuntimeException("Assertion failed");

    45     }

    46 

    47     /**

    48      * Exercise createSymbolicLink and readLink methods

    49      */

    50     static void testSymLinks(Path dir) throws IOException {

    51         final Path link = dir.resolve("link");

    52 

    53         // Check if sym links are supported

    54         try {

    55             link.createSymbolicLink(Paths.get("foo"));

    56             link.delete();

    57         } catch (UnsupportedOperationException x) {

    58             // sym links not supported

    59             return;

    60         } catch (IOException x) {

    61             // probably insufficient privileges to create sym links (Windows)

    62             return;

    63         }

    64 

    65         // Test links to various targets

    66         String[] windowsTargets =

    67             { "foo", "C:\\foo", "\\foo", "\\\\server\\share\\foo" };

    68         String[] otherTargets = { "relative", "/absolute" };

    69 

    70         String[] targets = (isWindows) ? windowsTargets : otherTargets;

    71         for (String s: targets) {

    72             Path target = Paths.get(s);

    73             link.createSymbolicLink(target);

    74             try {

    75                 assertTrue(link.readSymbolicLink().equals(target));

    76             } finally {

    77                 link.delete();

    78             }

    79         }

    80 

    81         // Test links to directory

    82         Path mydir = dir.resolve("mydir");

    83         Path myfile = mydir.resolve("myfile");

    84         try {

    85             mydir.createDirectory();

    86             myfile.createFile();

    87 

    88             // link -> "mydir"

    89             link.createSymbolicLink(mydir.getName());

    90             assertTrue(link.readSymbolicLink().equals(mydir.getName()));

    91 

    92             // Test access to directory via link

    93             DirectoryStream<Path> stream = link.newDirectoryStream();

    94             try {

    95                 boolean found = false;

    96                 for (Path entry: stream) {

    97                     if (entry.getName().equals(myfile.getName())) {

    98                         found = true;

    99                         break;

   100                     }

   101                 }

   102                 assertTrue(found);

   103             } finally {

   104                 stream.close();

   105             }

   106 

   107             // Test link2 -> link -> mydir

   108             final Path link2 = dir.resolve("link2");

   109             Path target2 = link.getName();

   110             link2.createSymbolicLink(target2);

   111             try {

   112                 assertTrue(link2.readSymbolicLink().equals(target2));

   113                 link2.newDirectoryStream().close();

   114             } finally {

   115                 link2.delete();

   116             }

   117 

   118             // Remove mydir and re-create link2 before re-creating mydir

   119             // (This is a useful test on Windows to ensure that creating a

   120             // sym link to a directory sym link creates the right type of link).

   121             myfile.delete();

   122             mydir.delete();

   123             link2.createSymbolicLink(target2);

   124             try {

   125                 assertTrue(link2.readSymbolicLink().equals(target2));

   126                 mydir.createDirectory();

   127                 link2.newDirectoryStream().close();

   128             } finally {

   129                 link2.delete();

   130             }

   131 

   132         } finally {

   133             myfile.deleteIfExists();

   134             mydir.deleteIfExists();

   135             link.deleteIfExists();

   136         }

   137     }

   138 

   139     /**

   140      * Exercise createLink method

   141      */

   142     static void testHardLinks(Path dir) throws IOException {

   143         Path foo = dir.resolve("foo").createFile();

   144         try {

   145             Path bar;

   146             try {

   147                 bar = dir.resolve("bar").createLink(foo);

   148             } catch (UnsupportedOperationException x) {

   149                 return;

   150             } catch (IOException x) {

   151                 // probably insufficient privileges (Windows)

   152                 return;

   153             }

   154             try {

   155                 Object key1 = Attributes

   156                     .readBasicFileAttributes(foo).fileKey();

   157                 Object key2 = Attributes

   158                     .readBasicFileAttributes(bar).fileKey();

   159                 assertTrue((key1 == null) || (key1.equals(key2)));

   160             } finally {

   161                 bar.delete();

   162             }

   163 

   164 

   165         } finally {

   166             foo.delete();

   167         }

   168     }

   169 

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

   171         Path dir = TestUtil.createTemporaryDirectory();

   172         try {

   173             testSymLinks(dir);

   174             testHardLinks(dir);

   175 

   176             // repeat tests on Windows with long path

   177             if (isWindows) {

   178                 Path dirWithLongPath = null;

   179                 try {

   180                     dirWithLongPath = TestUtil.createDirectoryWithLongPath(dir);

   181                 } catch (IOException x) {

   182                     System.out.println("Unable to create long path: " + x);

   183                 }

   184                 if (dirWithLongPath != null) {

   185                     System.out.println("");

   186                     System.out.println("** REPEAT TESTS WITH LONG PATH **");

   187                     testSymLinks(dirWithLongPath);

   188                     testHardLinks(dirWithLongPath);

   189                 }

   190             }

   191         } finally {

   192             TestUtil.removeAll(dir);

   193         }

   194     }

   195 }