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.Files 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 Files.createSymbolicLink(link, Paths.get("foo"));
56 Files.delete(link);
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 Files.createSymbolicLink(link, target);
74 try {
75 assertTrue(Files.readSymbolicLink(link).equals(target));
76 } finally {
77 Files.delete(link);
78 }
79 }
80
81 // Test links to directory
82 Path mydir = dir.resolve("mydir");
83 Path myfile = mydir.resolve("myfile");
84 try {
85 Files.createDirectory(mydir);
86 Files.createFile(myfile);
87
88 // link -> "mydir"
89 Files.createSymbolicLink(link, mydir.getFileName());
90 assertTrue(Files.readSymbolicLink(link).equals(mydir.getFileName()));
91
92 // Test access to directory via link
93 try (DirectoryStream<Path> stream = Files.newDirectoryStream(link)) {
94 boolean found = false;
95 for (Path entry: stream) {
96 if (entry.getFileName().equals(myfile.getFileName())) {
97 found = true;
98 break;
99 }
100 }
101 assertTrue(found);
102 }
103
104 // Test link2 -> link -> mydir
105 final Path link2 = dir.resolve("link2");
106 Path target2 = link.getFileName();
107 Files.createSymbolicLink(link2, target2);
108 try {
109 assertTrue(Files.readSymbolicLink(link2).equals(target2));
110 Files.newDirectoryStream(link2).close();
111 } finally {
112 Files.delete(link2);
113 }
114
115 // Remove mydir and re-create link2 before re-creating mydir
116 // (This is a useful test on Windows to ensure that creating a
117 // sym link to a directory sym link creates the right type of link).
118 Files.delete(myfile);
119 Files.delete(mydir);
120 Files.createSymbolicLink(link2, target2);
121 try {
122 assertTrue(Files.readSymbolicLink(link2).equals(target2));
123 Files.createDirectory(mydir);
124 Files.newDirectoryStream(link2).close();
125 } finally {
126 Files.delete(link2);
127 }
128
129 } finally {
130 Files.deleteIfExists(myfile);
131 Files.deleteIfExists(mydir);
132 Files.deleteIfExists(link);
133 }
134 }
135
136 /**
137 * Exercise createLink method
138 */
139 static void testHardLinks(Path dir) throws IOException {
140 Path foo = dir.resolve("foo");
141 Files.createFile(foo);
142 try {
143 Path bar = dir.resolve("bar");
144 try {
145 Files.createLink(bar, foo);
146 } catch (UnsupportedOperationException x) {
147 return;
148 } catch (IOException x) {
149 // probably insufficient privileges (Windows)
150 return;
151 }
152 try {
153 Object key1 = Files.readAttributes(foo, BasicFileAttributes.class).fileKey();
154 Object key2 = Files.readAttributes(bar, BasicFileAttributes.class).fileKey();
155 assertTrue((key1 == null) || (key1.equals(key2)));
156 } finally {
157 Files.delete(bar);
158 }
159
160
161 } finally {
162 Files.delete(foo);
163 }
164 }
165
166 public static void main(String[] args) throws IOException {
167 Path dir = TestUtil.createTemporaryDirectory();
168 try {
169 testSymLinks(dir);
170 testHardLinks(dir);
171
172 // repeat tests on Windows with long path
173 if (isWindows) {
174 Path dirWithLongPath = null;
175 try {
176 dirWithLongPath = TestUtil.createDirectoryWithLongPath(dir);
177 } catch (IOException x) {
178 System.out.println("Unable to create long path: " + x);
179 }
180 if (dirWithLongPath != null) {
181 System.out.println("");
182 System.out.println("** REPEAT TESTS WITH LONG PATH **");
183 testSymLinks(dirWithLongPath);
184 testHardLinks(dirWithLongPath);
185 }
186 }
187 } finally {
188 TestUtil.removeAll(dir);
189 }
190 }
191 }