377 lines
12 KiB
Java
377 lines
12 KiB
Java
/*
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* Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @bug 6595866
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* @summary Test java.io.File operations with sym links
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* @build SymLinks Util
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* @run main SymLinks
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*/
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import java.io.*;
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import java.nio.file.*;
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import java.nio.file.attribute.*;
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import static java.nio.file.LinkOption.*;
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public class SymLinks {
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static final PrintStream out = System.out;
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static final File top = new File(System.getProperty("test.dir", "."));
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// files used by the test
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static final File file = new File(top, "foofile");
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static final File link2file = new File(top, "link2file");
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static final File link2link2file = new File(top, "link2link2file");
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static final File dir = new File(top, "foodir");
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static final File link2dir = new File(top, "link2dir");
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static final File link2link2dir = new File(top, "link2link2dir");
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static final File link2nobody = new File(top, "link2nobody");
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static final File link2link2nobody = new File(top, "link2link2nobody");
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/**
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* Setup files, directories, and sym links used by test.
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*/
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static void setup() throws IOException {
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// link2link2file -> link2file -> foofile
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FileOutputStream fos = new FileOutputStream(file);
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try {
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fos.write(new byte[16*1024]);
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} finally {
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fos.close();
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}
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mklink(link2file, file);
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mklink(link2link2file, link2file);
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// link2link2dir -> link2dir -> dir
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assertTrue(dir.mkdir());
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mklink(link2dir, dir);
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mklink(link2link2dir, link2dir);
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// link2link2nobody -> link2nobody -> <does-not-exist>
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mklink(link2nobody, new File(top, "DoesNotExist"));
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mklink(link2link2nobody, link2nobody);
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}
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/**
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* Remove files, directories, and sym links used by test.
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*/
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static void cleanup() throws IOException {
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if (file != null)
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file.delete();
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if (link2file != null)
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Files.deleteIfExists(link2file.toPath());
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if (link2link2file != null)
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Files.deleteIfExists(link2link2file.toPath());
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if (dir != null)
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dir.delete();
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if (link2dir != null)
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Files.deleteIfExists(link2dir.toPath());
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if (link2link2dir != null)
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Files.deleteIfExists(link2link2dir.toPath());
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if (link2nobody != null)
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Files.deleteIfExists(link2nobody.toPath());
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if (link2link2nobody != null)
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Files.deleteIfExists(link2link2nobody.toPath());
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}
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/**
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* Creates a sym link source->target
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*/
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static void mklink(File source, File target) throws IOException {
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Files.createSymbolicLink(source.toPath(), target.toPath());
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}
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/**
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* Returns true if the "link" exists and is a sym link.
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*/
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static boolean isSymLink(File link) {
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return Files.isSymbolicLink(link.toPath());
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}
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/**
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* Returns the last modified time of a sym link.
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*/
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static long lastModifiedOfSymLink(File link) throws IOException {
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BasicFileAttributes attrs =
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Files.readAttributes(link.toPath(), BasicFileAttributes.class, NOFOLLOW_LINKS);
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assertTrue(attrs.isSymbolicLink());
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return attrs.lastModifiedTime().toMillis();
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}
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/**
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* Returns true if sym links are supported on the file system where
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* "dir" exists.
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*/
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static boolean supportsSymLinks(File dir) {
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Path link = dir.toPath().resolve("link");
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Path target = dir.toPath().resolve("target");
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try {
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Files.createSymbolicLink(link, target);
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Files.delete(link);
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return true;
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} catch (UnsupportedOperationException x) {
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return false;
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} catch (IOException x) {
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return false;
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}
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}
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static void assertTrue(boolean v) {
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if (!v) throw new RuntimeException("Test failed");
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}
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static void assertFalse(boolean v) {
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assertTrue(!v);
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}
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static void header(String h) {
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out.println();
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out.println();
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out.println("-- " + h + " --");
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}
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/**
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* Tests go here.
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*/
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static void go() throws IOException {
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// check setup
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assertTrue(file.isFile());
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assertTrue(isSymLink(link2file));
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assertTrue(isSymLink(link2link2file));
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assertTrue(dir.isDirectory());
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assertTrue(isSymLink(link2dir));
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assertTrue(isSymLink(link2link2dir));
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assertTrue(isSymLink(link2nobody));
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assertTrue(isSymLink(link2link2nobody));
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header("createNewFile");
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assertFalse(file.createNewFile());
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assertFalse(link2file.createNewFile());
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assertFalse(link2link2file.createNewFile());
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assertFalse(dir.createNewFile());
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assertFalse(link2dir.createNewFile());
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assertFalse(link2link2dir.createNewFile());
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assertFalse(link2nobody.createNewFile());
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assertFalse(link2link2nobody.createNewFile());
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header("mkdir");
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assertFalse(file.mkdir());
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assertFalse(link2file.mkdir());
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assertFalse(link2link2file.mkdir());
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assertFalse(dir.mkdir());
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assertFalse(link2dir.mkdir());
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assertFalse(link2link2dir.mkdir());
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assertFalse(link2nobody.mkdir());
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assertFalse(link2link2nobody.mkdir());
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header("delete");
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File link = new File(top, "mylink");
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try {
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mklink(link, file);
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assertTrue(link.delete());
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assertTrue(!isSymLink(link));
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assertTrue(file.exists());
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mklink(link, link2file);
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assertTrue(link.delete());
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assertTrue(!isSymLink(link));
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assertTrue(link2file.exists());
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mklink(link, dir);
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assertTrue(link.delete());
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assertTrue(!isSymLink(link));
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assertTrue(dir.exists());
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mklink(link, link2dir);
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assertTrue(link.delete());
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assertTrue(!isSymLink(link));
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assertTrue(link2dir.exists());
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mklink(link, link2nobody);
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assertTrue(link.delete());
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assertTrue(!isSymLink(link));
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assertTrue(isSymLink(link2nobody));
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} finally {
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Files.deleteIfExists(link.toPath());
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}
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header("renameTo");
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File newlink = new File(top, "newlink");
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assertTrue(link2file.renameTo(newlink));
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try {
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assertTrue(file.exists());
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assertTrue(isSymLink(newlink));
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assertTrue(!isSymLink(link2file));
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} finally {
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newlink.renameTo(link2file); // restore link
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}
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assertTrue(link2dir.renameTo(newlink));
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try {
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assertTrue(dir.exists());
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assertTrue(isSymLink(newlink));
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assertTrue(!isSymLink(link2dir));
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} finally {
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newlink.renameTo(link2dir); // restore link
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}
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header("list");
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final String name = "entry";
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File entry = new File(dir, name);
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try {
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assertTrue(dir.list().length == 0); // directory should be empty
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assertTrue(link2dir.list().length == 0);
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assertTrue(link2link2dir.list().length == 0);
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assertTrue(entry.createNewFile());
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assertTrue(dir.list().length == 1);
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assertTrue(dir.list()[0].equals(name));
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// access directory by following links
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assertTrue(link2dir.list().length == 1);
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assertTrue(link2dir.list()[0].equals(name));
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assertTrue(link2link2dir.list().length == 1);
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assertTrue(link2link2dir.list()[0].equals(name));
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// files that are not directories
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assertTrue(link2file.list() == null);
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assertTrue(link2nobody.list() == null);
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} finally {
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entry.delete();
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}
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header("isXXX");
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assertTrue(file.isFile());
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assertTrue(link2file.isFile());
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assertTrue(link2link2file.isFile());
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assertTrue(dir.isDirectory());
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assertTrue(link2dir.isDirectory());
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assertTrue(link2link2dir.isDirectory());
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// on Windows we test with the DOS hidden attribute set
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if (System.getProperty("os.name").startsWith("Windows")) {
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DosFileAttributeView view = Files
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.getFileAttributeView(file.toPath(), DosFileAttributeView.class);
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view.setHidden(true);
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try {
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assertTrue(file.isHidden());
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assertTrue(link2file.isHidden());
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assertTrue(link2link2file.isHidden());
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} finally {
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view.setHidden(false);
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}
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assertFalse(file.isHidden());
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assertFalse(link2file.isHidden());
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assertFalse(link2link2file.isHidden());
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}
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header("length");
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long len = file.length();
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assertTrue(len > 0L);
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// these tests should follow links
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assertTrue(link2file.length() == len);
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assertTrue(link2link2file.length() == len);
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assertTrue(link2nobody.length() == 0L);
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header("lastModified / setLastModified");
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// need time to diff between link and file
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long origLastModified = file.lastModified();
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assertTrue(origLastModified != 0L);
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try { Thread.sleep(2000); } catch (InterruptedException x) { }
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file.setLastModified(System.currentTimeMillis());
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long lastModified = file.lastModified();
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assertTrue(lastModified != origLastModified);
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assertTrue(lastModifiedOfSymLink(link2file) != lastModified);
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assertTrue(lastModifiedOfSymLink(link2link2file) != lastModified);
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assertTrue(link2file.lastModified() == lastModified);
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assertTrue(link2link2file.lastModified() == lastModified);
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assertTrue(link2nobody.lastModified() == 0L);
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origLastModified = dir.lastModified();
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assertTrue(origLastModified != 0L);
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dir.setLastModified(0L);
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assertTrue(dir.lastModified() == 0L);
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assertTrue(link2dir.lastModified() == 0L);
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assertTrue(link2link2dir.lastModified() == 0L);
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dir.setLastModified(origLastModified);
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header("setXXX / canXXX");
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assertTrue(file.canRead());
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assertTrue(file.canWrite());
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assertTrue(link2file.canRead());
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assertTrue(link2file.canWrite());
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assertTrue(link2link2file.canRead());
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assertTrue(link2link2file.canWrite());
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if (!Util.isPrivileged() && file.setReadOnly()) {
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assertFalse(file.canWrite());
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assertFalse(link2file.canWrite());
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assertFalse(link2link2file.canWrite());
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assertTrue(file.setWritable(true)); // make writable
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assertTrue(file.canWrite());
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assertTrue(link2file.canWrite());
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assertTrue(link2link2file.canWrite());
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assertTrue(link2file.setReadOnly()); // make read only
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assertFalse(file.canWrite());
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assertFalse(link2file.canWrite());
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assertFalse(link2link2file.canWrite());
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assertTrue(link2link2file.setWritable(true)); // make writable
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assertTrue(file.canWrite());
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assertTrue(link2file.canWrite());
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assertTrue(link2link2file.canWrite());
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}
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}
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public static void main(String[] args) throws IOException {
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if (supportsSymLinks(top)) {
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try {
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setup();
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go();
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} finally {
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cleanup();
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}
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}
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}
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}
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