undefect. CWE-407 — 63 sites patched across 27 ecosystems
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
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362
test/jdk/java/nio/file/Files/Misc.java
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362
test/jdk/java/nio/file/Files/Misc.java
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/*
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* Copyright (c) 2008, 2025, 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 4313887 6838333 8005566 8154364 8215467 8255576 8286160
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* @summary Unit test for miscellaneous methods in java.nio.file.Files
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* @library .. /test/lib
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* @build jdk.test.lib.Platform
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* @run main Misc
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*/
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import java.io.IOException;
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import java.io.File;
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import java.nio.file.FileAlreadyExistsException;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.attribute.AclEntry;
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import java.nio.file.attribute.AclEntryPermission;
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import java.nio.file.attribute.AclEntryType;
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import java.nio.file.attribute.AclFileAttributeView;
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import java.nio.file.attribute.DosFileAttributeView;
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import java.nio.file.attribute.UserPrincipal;
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import java.util.List;
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import jdk.test.lib.Platform;
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import static java.nio.file.Files.*;
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import static java.nio.file.LinkOption.*;
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public class Misc {
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public static void main(String[] args) throws IOException {
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Path dir = TestUtil.createTemporaryDirectory();
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try {
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testIsHidden(dir);
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testIsSameFile(dir);
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testFileTypeMethods(dir);
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testAccessMethods(dir);
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} finally {
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TestUtil.removeAll(dir);
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}
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}
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/**
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* Tests isHidden
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*/
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static void testIsHidden(Path tmpdir) throws IOException {
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// passing an empty path must not throw any runtime exception
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assertTrue(!isHidden(Path.of("")));
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assertTrue(!isHidden(tmpdir));
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Path file = tmpdir.resolve(".foo");
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if (Platform.isWindows()) {
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createFile(file);
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try {
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setAttribute(file, "dos:hidden", true);
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try {
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assertTrue(isHidden(file));
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} finally {
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setAttribute(file, "dos:hidden", false);
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}
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} finally {
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delete(file);
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}
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Path dir = tmpdir.resolve("hidden");
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createDirectory(dir);
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try {
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setAttribute(dir, "dos:hidden", true);
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try {
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assertTrue(isHidden(dir));
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} finally {
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setAttribute(dir, "dos:hidden", false);
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}
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} finally {
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delete(dir);
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}
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} else {
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assertTrue(isHidden(file));
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}
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}
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/**
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* Tests isSameFile
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*/
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static void testIsSameFile(Path tmpdir) throws IOException {
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Path thisFile = tmpdir.resolve("thisFile");
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Path thatFile = tmpdir.resolve("thatFile");
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/**
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* Test: isSameFile for self
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*/
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assertTrue(isSameFile(thisFile, thisFile));
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/**
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* Test: Neither file exists
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*/
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assertTrue(!isSameFile(thisFile, thatFile));
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assertTrue(!isSameFile(thatFile, thisFile));
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createFile(thisFile);
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try {
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/**
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* Test: One file exists
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*/
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assertTrue(!isSameFile(thisFile, thatFile));
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assertTrue(!isSameFile(thatFile, thisFile));
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/**
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* Test: Both file exists
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*/
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createFile(thatFile);
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try {
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assertTrue(!isSameFile(thisFile, thatFile));
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assertTrue(!isSameFile(thatFile, thisFile));
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} finally {
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delete(thatFile);
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}
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/**
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* Test: Symbolic links
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*/
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if (TestUtil.supportsSymbolicLinks(tmpdir)) {
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createSymbolicLink(thatFile, thisFile);
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try {
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assertTrue(isSameFile(thisFile, thatFile));
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assertTrue(isSameFile(thatFile, thisFile));
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} finally {
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TestUtil.deleteUnchecked(thatFile);
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}
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}
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} finally {
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delete(thisFile);
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}
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// nulls
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try {
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isSameFile(thisFile, null);
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throw new RuntimeException("NullPointerException expected");
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} catch (NullPointerException ignore) { }
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try {
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isSameFile(null, thatFile);
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throw new RuntimeException("NullPointerException expected");
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} catch (NullPointerException ignore) { }
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}
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/**
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* Exercise isRegularFile, isDirectory, isSymbolicLink
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*/
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static void testFileTypeMethods(Path tmpdir) throws IOException {
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assertTrue(!isRegularFile(tmpdir));
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assertTrue(!isRegularFile(tmpdir, NOFOLLOW_LINKS));
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assertTrue(isDirectory(tmpdir));
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assertTrue(isDirectory(tmpdir, NOFOLLOW_LINKS));
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assertTrue(!isSymbolicLink(tmpdir));
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Path file = createFile(tmpdir.resolve("foo"));
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try {
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assertTrue(isRegularFile(file));
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assertTrue(isRegularFile(file, NOFOLLOW_LINKS));
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assertTrue(!isDirectory(file));
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assertTrue(!isDirectory(file, NOFOLLOW_LINKS));
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assertTrue(!isSymbolicLink(file));
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if (TestUtil.supportsSymbolicLinks(tmpdir)) {
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Path link = tmpdir.resolve("link");
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createSymbolicLink(link, tmpdir);
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try {
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assertTrue(!isRegularFile(link));
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assertTrue(!isRegularFile(link, NOFOLLOW_LINKS));
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assertTrue(isDirectory(link));
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assertTrue(!isDirectory(link, NOFOLLOW_LINKS));
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assertTrue(isSymbolicLink(link));
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} finally {
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delete(link);
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}
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createSymbolicLink(link, file);
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try {
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assertTrue(isRegularFile(link));
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assertTrue(!isRegularFile(link, NOFOLLOW_LINKS));
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assertTrue(!isDirectory(link));
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assertTrue(!isDirectory(link, NOFOLLOW_LINKS));
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assertTrue(isSymbolicLink(link));
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} finally {
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delete(link);
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}
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}
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if (TestUtil.supportsHardLinks(tmpdir)) {
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Path link = tmpdir.resolve("hardlink");
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createLink(link, file);
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try {
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assertTrue(isRegularFile(link));
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assertTrue(isRegularFile(link, NOFOLLOW_LINKS));
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assertTrue(!isDirectory(link));
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assertTrue(!isDirectory(link, NOFOLLOW_LINKS));
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assertTrue(!isSymbolicLink(link));
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} finally {
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delete(link);
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}
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}
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} finally {
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delete(file);
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}
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}
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/**
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* Exercise isReadbale, isWritable, isExecutable, exists, notExists
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*/
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static void testAccessMethods(Path tmpdir) throws IOException {
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// should return false when file does not exist
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Path doesNotExist = tmpdir.resolve("doesNotExist");
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assertTrue(!isReadable(doesNotExist));
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assertTrue(!isWritable(doesNotExist));
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assertTrue(!isExecutable(doesNotExist));
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assertTrue(!exists(doesNotExist));
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assertTrue(notExists(doesNotExist));
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Path file = createFile(tmpdir.resolve("foo"));
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try {
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// files exist
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assertTrue(isReadable(file));
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assertTrue(isWritable(file));
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assertTrue(exists(file));
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assertTrue(!notExists(file));
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assertTrue(isReadable(tmpdir));
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assertTrue(isWritable(tmpdir));
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assertTrue(exists(tmpdir));
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assertTrue(!notExists(tmpdir));
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if (Platform.isWindows()) {
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Path pageFile = Path.of("C:\\pagefile.sys");
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if (pageFile.toFile().exists()) {
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System.out.printf("Check page file %s%n", pageFile);
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assertTrue(exists(pageFile));
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}
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}
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// sym link exists
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if (TestUtil.supportsSymbolicLinks(tmpdir)) {
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Path link = tmpdir.resolve("link");
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createSymbolicLink(link, file);
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try {
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assertTrue(isReadable(link));
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assertTrue(isWritable(link));
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assertTrue(exists(link));
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assertTrue(!notExists(link));
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} finally {
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delete(link);
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}
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createSymbolicLink(link, doesNotExist);
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try {
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assertTrue(!isReadable(link));
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assertTrue(!isWritable(link));
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assertTrue(!exists(link));
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assertTrue(exists(link, NOFOLLOW_LINKS));
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assertTrue(notExists(link));
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assertTrue(!notExists(link, NOFOLLOW_LINKS));
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} finally {
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delete(link);
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}
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}
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/**
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* Test: Edit ACL to deny WRITE and EXECUTE
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*/
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if (getFileStore(file).supportsFileAttributeView("acl")) {
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AclFileAttributeView view =
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getFileAttributeView(file, AclFileAttributeView.class);
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UserPrincipal owner = view.getOwner();
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List<AclEntry> acl = view.getAcl();
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// Insert entry to deny WRITE and EXECUTE
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AclEntry entry = AclEntry.newBuilder()
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.setType(AclEntryType.DENY)
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.setPrincipal(owner)
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.setPermissions(AclEntryPermission.WRITE_DATA,
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AclEntryPermission.EXECUTE)
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.build();
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acl.add(0, entry);
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view.setAcl(acl);
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try {
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if (isRoot()) {
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// root has all permissions
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assertTrue(isWritable(file));
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assertTrue(isExecutable(file));
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} else {
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assertTrue(!isWritable(file));
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assertTrue(!isExecutable(file));
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}
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} finally {
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// Restore ACL
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acl.remove(0);
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view.setAcl(acl);
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}
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}
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/**
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* Test: Windows DOS read-only attribute
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*/
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if (Platform.isWindows()) {
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setAttribute(file, "dos:readonly", true);
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try {
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assertTrue(!isWritable(file));
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} finally {
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setAttribute(file, "dos:readonly", false);
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}
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// Read-only attribute does not make direcory read-only
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DosFileAttributeView view =
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getFileAttributeView(tmpdir, DosFileAttributeView.class);
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boolean save = view.readAttributes().isReadOnly();
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view.setReadOnly(true);
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try {
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assertTrue(isWritable(file));
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} finally {
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view.setReadOnly(save);
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}
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}
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} finally {
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delete(file);
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}
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}
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static void assertTrue(boolean okay) {
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if (!okay)
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throw new RuntimeException("Assertion Failed");
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}
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private static boolean isRoot() {
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if (Platform.isWindows())
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return false;
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Path passwd = Path.of("/etc/passwd");
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return Files.isWritable(passwd);
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}
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}
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