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/*
* Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 4313887 6838333 6863864
* @summary Unit test for java.nio.file.Files createSymbolicLink,
* readSymbolicLink, and createLink methods
* @library ..
* @build Links
* @run main/othervm Links
*/
import java.nio.file.*;
import java.nio.file.attribute.*;
import java.io.*;
public class Links {
static final boolean isWindows =
System.getProperty("os.name").startsWith("Windows");
static void assertTrue(boolean okay) {
if (!okay)
throw new RuntimeException("Assertion failed");
}
/**
* Exercise createSymbolicLink and readLink methods
*/
static void testSymLinks(Path dir) throws IOException {
final Path link = dir.resolve("link");
// Check if sym links are supported
try {
Files.createSymbolicLink(link, Paths.get("foo"));
Files.delete(link);
} catch (UnsupportedOperationException x) {
// sym links not supported
return;
} catch (IOException x) {
// probably insufficient privileges to create sym links (Windows)
return;
}
// Test links to various targets
String[] windowsTargets =
{ "foo", "C:\\foo", "\\foo", "\\\\server\\share\\foo" };
String[] otherTargets = { "relative", "/absolute" };
String[] targets = (isWindows) ? windowsTargets : otherTargets;
for (String s: targets) {
Path target = Paths.get(s);
Files.createSymbolicLink(link, target);
try {
assertTrue(Files.readSymbolicLink(link).equals(target));
} finally {
Files.delete(link);
}
}
// Test links to directory
Path mydir = dir.resolve("mydir");
Path myfile = mydir.resolve("myfile");
try {
Files.createDirectory(mydir);
Files.createFile(myfile);
// link -> "mydir"
Files.createSymbolicLink(link, mydir.getFileName());
assertTrue(Files.readSymbolicLink(link).equals(mydir.getFileName()));
// Test access to directory via link
try (DirectoryStream<Path> stream = Files.newDirectoryStream(link)) {
boolean found = false;
for (Path entry: stream) {
if (entry.getFileName().equals(myfile.getFileName())) {
found = true;
break;
}
}
assertTrue(found);
}
// Test link2 -> link -> mydir
final Path link2 = dir.resolve("link2");
Path target2 = link.getFileName();
Files.createSymbolicLink(link2, target2);
try {
assertTrue(Files.readSymbolicLink(link2).equals(target2));
Files.newDirectoryStream(link2).close();
} finally {
Files.delete(link2);
}
// Remove mydir and re-create link2 before re-creating mydir
// (This is a useful test on Windows to ensure that creating a
// sym link to a directory sym link creates the right type of link).
Files.delete(myfile);
Files.delete(mydir);
Files.createSymbolicLink(link2, target2);
try {
assertTrue(Files.readSymbolicLink(link2).equals(target2));
Files.createDirectory(mydir);
Files.newDirectoryStream(link2).close();
} finally {
Files.delete(link2);
}
} finally {
Files.deleteIfExists(myfile);
Files.deleteIfExists(mydir);
Files.deleteIfExists(link);
}
}
/**
* Exercise createLink method
*/
static void testHardLinks(Path dir) throws IOException {
Path foo = dir.resolve("foo");
Files.createFile(foo);
try {
Path bar = dir.resolve("bar");
try {
Files.createLink(bar, foo);
} catch (UnsupportedOperationException x) {
return;
} catch (IOException x) {
// probably insufficient privileges (Windows)
return;
}
try {
Object key1 = Files.readAttributes(foo, BasicFileAttributes.class).fileKey();
Object key2 = Files.readAttributes(bar, BasicFileAttributes.class).fileKey();
assertTrue((key1 == null) || (key1.equals(key2)));
} finally {
Files.delete(bar);
}
} finally {
Files.delete(foo);
}
}
public static void main(String[] args) throws IOException {
Path dir = TestUtil.createTemporaryDirectory();
try {
testSymLinks(dir);
testHardLinks(dir);
// repeat tests on Windows with long path
if (isWindows) {
Path dirWithLongPath = null;
try {
dirWithLongPath = TestUtil.createDirectoryWithLongPath(dir);
} catch (IOException x) {
System.out.println("Unable to create long path: " + x);
}
if (dirWithLongPath != null) {
System.out.println("");
System.out.println("** REPEAT TESTS WITH LONG PATH **");
testSymLinks(dirWithLongPath);
testHardLinks(dirWithLongPath);
}
}
} finally {
TestUtil.removeAll(dir);
}
}
}
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