--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/io/File/SymLinks.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,376 @@
+/*
+ * Copyright (c) 2009, 2012, 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 6595866
+ * @summary Test java.io.File operations with sym links
+ * @build SymLinks Util
+ * @run main SymLinks
+ */
+
+import java.io.*;
+import java.nio.file.*;
+import java.nio.file.attribute.*;
+import static java.nio.file.LinkOption.*;
+
+public class SymLinks {
+ static final PrintStream out = System.out;
+
+ static final File top = new File(System.getProperty("test.dir", "."));
+
+ // files used by the test
+
+ static final File file = new File(top, "foofile");
+ static final File link2file = new File(top, "link2file");
+ static final File link2link2file = new File(top, "link2link2file");
+
+ static final File dir = new File(top, "foodir");
+ static final File link2dir = new File(top, "link2dir");
+ static final File link2link2dir = new File(top, "link2link2dir");
+
+ static final File link2nobody = new File(top, "link2nobody");
+ static final File link2link2nobody = new File(top, "link2link2nobody");
+
+ /**
+ * Setup files, directories, and sym links used by test.
+ */
+ static void setup() throws IOException {
+ // link2link2file -> link2file -> foofile
+ FileOutputStream fos = new FileOutputStream(file);
+ try {
+ fos.write(new byte[16*1024]);
+ } finally {
+ fos.close();
+ }
+ mklink(link2file, file);
+ mklink(link2link2file, link2file);
+
+ // link2link2dir -> link2dir -> dir
+ assertTrue(dir.mkdir());
+ mklink(link2dir, dir);
+ mklink(link2link2dir, link2dir);
+
+ // link2link2nobody -> link2nobody -> <does-not-exist>
+ mklink(link2nobody, new File(top, "DoesNotExist"));
+ mklink(link2link2nobody, link2nobody);
+ }
+
+ /**
+ * Remove files, directories, and sym links used by test.
+ */
+ static void cleanup() throws IOException {
+ if (file != null)
+ file.delete();
+ if (link2file != null)
+ Files.deleteIfExists(link2file.toPath());
+ if (link2link2file != null)
+ Files.deleteIfExists(link2link2file.toPath());
+ if (dir != null)
+ dir.delete();
+ if (link2dir != null)
+ Files.deleteIfExists(link2dir.toPath());
+ if (link2link2dir != null)
+ Files.deleteIfExists(link2link2dir.toPath());
+ if (link2nobody != null)
+ Files.deleteIfExists(link2nobody.toPath());
+ if (link2link2nobody != null)
+ Files.deleteIfExists(link2link2nobody.toPath());
+ }
+
+ /**
+ * Creates a sym link source->target
+ */
+ static void mklink(File source, File target) throws IOException {
+ Files.createSymbolicLink(source.toPath(), target.toPath());
+ }
+
+ /**
+ * Returns true if the "link" exists and is a sym link.
+ */
+ static boolean isSymLink(File link) {
+ return Files.isSymbolicLink(link.toPath());
+ }
+
+ /**
+ * Returns the last modified time of a sym link.
+ */
+ static long lastModifiedOfSymLink(File link) throws IOException {
+ BasicFileAttributes attrs =
+ Files.readAttributes(link.toPath(), BasicFileAttributes.class, NOFOLLOW_LINKS);
+ assertTrue(attrs.isSymbolicLink());
+ return attrs.lastModifiedTime().toMillis();
+ }
+
+ /**
+ * Returns true if sym links are supported on the file system where
+ * "dir" exists.
+ */
+ static boolean supportsSymLinks(File dir) {
+ Path link = dir.toPath().resolve("link");
+ Path target = dir.toPath().resolve("target");
+ try {
+ Files.createSymbolicLink(link, target);
+ Files.delete(link);
+ return true;
+ } catch (UnsupportedOperationException x) {
+ return false;
+ } catch (IOException x) {
+ return false;
+ }
+ }
+
+ static void assertTrue(boolean v) {
+ if (!v) throw new RuntimeException("Test failed");
+ }
+
+ static void assertFalse(boolean v) {
+ assertTrue(!v);
+ }
+
+ static void header(String h) {
+ out.println();
+ out.println();
+ out.println("-- " + h + " --");
+ }
+
+ /**
+ * Tests go here.
+ */
+ static void go() throws IOException {
+
+ // check setup
+ assertTrue(file.isFile());
+ assertTrue(isSymLink(link2file));
+ assertTrue(isSymLink(link2link2file));
+ assertTrue(dir.isDirectory());
+ assertTrue(isSymLink(link2dir));
+ assertTrue(isSymLink(link2link2dir));
+ assertTrue(isSymLink(link2nobody));
+ assertTrue(isSymLink(link2link2nobody));
+
+ header("createNewFile");
+
+ assertFalse(file.createNewFile());
+ assertFalse(link2file.createNewFile());
+ assertFalse(link2link2file.createNewFile());
+ assertFalse(dir.createNewFile());
+ assertFalse(link2dir.createNewFile());
+ assertFalse(link2link2dir.createNewFile());
+ assertFalse(link2nobody.createNewFile());
+ assertFalse(link2link2nobody.createNewFile());
+
+ header("mkdir");
+
+ assertFalse(file.mkdir());
+ assertFalse(link2file.mkdir());
+ assertFalse(link2link2file.mkdir());
+ assertFalse(dir.mkdir());
+ assertFalse(link2dir.mkdir());
+ assertFalse(link2link2dir.mkdir());
+ assertFalse(link2nobody.mkdir());
+ assertFalse(link2link2nobody.mkdir());
+
+ header("delete");
+
+ File link = new File(top, "mylink");
+ try {
+ mklink(link, file);
+ assertTrue(link.delete());
+ assertTrue(!isSymLink(link));
+ assertTrue(file.exists());
+
+ mklink(link, link2file);
+ assertTrue(link.delete());
+ assertTrue(!isSymLink(link));
+ assertTrue(link2file.exists());
+
+ mklink(link, dir);
+ assertTrue(link.delete());
+ assertTrue(!isSymLink(link));
+ assertTrue(dir.exists());
+
+ mklink(link, link2dir);
+ assertTrue(link.delete());
+ assertTrue(!isSymLink(link));
+ assertTrue(link2dir.exists());
+
+ mklink(link, link2nobody);
+ assertTrue(link.delete());
+ assertTrue(!isSymLink(link));
+ assertTrue(isSymLink(link2nobody));
+
+ } finally {
+ Files.deleteIfExists(link.toPath());
+ }
+
+ header("renameTo");
+
+ File newlink = new File(top, "newlink");
+ assertTrue(link2file.renameTo(newlink));
+ try {
+ assertTrue(file.exists());
+ assertTrue(isSymLink(newlink));
+ assertTrue(!isSymLink(link2file));
+ } finally {
+ newlink.renameTo(link2file); // restore link
+ }
+
+ assertTrue(link2dir.renameTo(newlink));
+ try {
+ assertTrue(dir.exists());
+ assertTrue(isSymLink(newlink));
+ assertTrue(!isSymLink(link2dir));
+ } finally {
+ newlink.renameTo(link2dir); // restore link
+ }
+
+ header("list");
+
+ final String name = "entry";
+ File entry = new File(dir, name);
+ try {
+ assertTrue(dir.list().length == 0); // directory should be empty
+ assertTrue(link2dir.list().length == 0);
+ assertTrue(link2link2dir.list().length == 0);
+
+ assertTrue(entry.createNewFile());
+ assertTrue(dir.list().length == 1);
+ assertTrue(dir.list()[0].equals(name));
+
+ // access directory by following links
+ assertTrue(link2dir.list().length == 1);
+ assertTrue(link2dir.list()[0].equals(name));
+ assertTrue(link2link2dir.list().length == 1);
+ assertTrue(link2link2dir.list()[0].equals(name));
+
+ // files that are not directories
+ assertTrue(link2file.list() == null);
+ assertTrue(link2nobody.list() == null);
+
+ } finally {
+ entry.delete();
+ }
+
+ header("isXXX");
+
+ assertTrue(file.isFile());
+ assertTrue(link2file.isFile());
+ assertTrue(link2link2file.isFile());
+
+ assertTrue(dir.isDirectory());
+ assertTrue(link2dir.isDirectory());
+ assertTrue(link2link2dir.isDirectory());
+
+ // on Windows we test with the DOS hidden attribute set
+ if (System.getProperty("os.name").startsWith("Windows")) {
+ DosFileAttributeView view = Files
+ .getFileAttributeView(file.toPath(), DosFileAttributeView.class);
+ view.setHidden(true);
+ try {
+ assertTrue(file.isHidden());
+ assertTrue(link2file.isHidden());
+ assertTrue(link2link2file.isHidden());
+ } finally {
+ view.setHidden(false);
+ }
+ assertFalse(file.isHidden());
+ assertFalse(link2file.isHidden());
+ assertFalse(link2link2file.isHidden());
+ }
+
+ header("length");
+
+ long len = file.length();
+ assertTrue(len > 0L);
+ // these tests should follow links
+ assertTrue(link2file.length() == len);
+ assertTrue(link2link2file.length() == len);
+ assertTrue(link2nobody.length() == 0L);
+
+ header("lastModified / setLastModified");
+
+ // need time to diff between link and file
+ long origLastModified = file.lastModified();
+ assertTrue(origLastModified != 0L);
+ try { Thread.sleep(2000); } catch (InterruptedException x) { }
+ file.setLastModified(System.currentTimeMillis());
+
+ long lastModified = file.lastModified();
+ assertTrue(lastModified != origLastModified);
+ assertTrue(lastModifiedOfSymLink(link2file) != lastModified);
+ assertTrue(lastModifiedOfSymLink(link2link2file) != lastModified);
+ assertTrue(link2file.lastModified() == lastModified);
+ assertTrue(link2link2file.lastModified() == lastModified);
+ assertTrue(link2nobody.lastModified() == 0L);
+
+ origLastModified = dir.lastModified();
+ assertTrue(origLastModified != 0L);
+ dir.setLastModified(0L);
+ assertTrue(dir.lastModified() == 0L);
+ assertTrue(link2dir.lastModified() == 0L);
+ assertTrue(link2link2dir.lastModified() == 0L);
+ dir.setLastModified(origLastModified);
+
+ header("setXXX / canXXX");
+
+ assertTrue(file.canRead());
+ assertTrue(file.canWrite());
+ assertTrue(link2file.canRead());
+ assertTrue(link2file.canWrite());
+ assertTrue(link2link2file.canRead());
+ assertTrue(link2link2file.canWrite());
+
+ if (!Util.isPrivileged() && file.setReadOnly()) {
+ assertFalse(file.canWrite());
+ assertFalse(link2file.canWrite());
+ assertFalse(link2link2file.canWrite());
+
+ assertTrue(file.setWritable(true)); // make writable
+ assertTrue(file.canWrite());
+ assertTrue(link2file.canWrite());
+ assertTrue(link2link2file.canWrite());
+
+ assertTrue(link2file.setReadOnly()); // make read only
+ assertFalse(file.canWrite());
+ assertFalse(link2file.canWrite());
+ assertFalse(link2link2file.canWrite());
+
+ assertTrue(link2link2file.setWritable(true)); // make writable
+ assertTrue(file.canWrite());
+ assertTrue(link2file.canWrite());
+ assertTrue(link2link2file.canWrite());
+ }
+ }
+
+ public static void main(String[] args) throws IOException {
+ if (supportsSymLinks(top)) {
+ try {
+ setup();
+ go();
+ } finally {
+ cleanup();
+ }
+ }
+ }
+
+}