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undefect. CWE-407 — 63 sites patched across 27 ecosystems

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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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russell@unturf.com 2026-03-26 17:11:57 -04:00
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test/jdk/java/io/File/createTempFile/TargetDirectory.java Normal file
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/*
* Copyright (c) 2025, 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 4847239
* @summary Verify directory parameter behavior in File.createTempFile(String,String,File)
* @library /test/lib
* @run junit TargetDirectory
*/
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.io.TempDir;
import org.junit.jupiter.api.io.CleanupMode;
import org.junit.jupiter.api.condition.DisabledIf;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.attribute.AclEntry;
import java.nio.file.attribute.AclEntryPermission;
import java.nio.file.attribute.AclFileAttributeView;
import java.nio.file.attribute.PosixFileAttributeView;
import java.nio.file.attribute.PosixFilePermission;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import jdk.test.lib.Platform;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
class TargetDirectory {
@TempDir(cleanup = CleanupMode.ALWAYS)
Path tempDir;
@Test
void testWritableDirectory() throws Exception {
Path dir = tempDir.resolve("target");
File target = Files.createDirectory(dir).toFile();
File tmp = File.createTempFile("passes", null, target);
assertTrue(Files.exists(tmp.toPath()), "Temp file not created");
}
@Test
@DisabledIf("jdk.test.lib.Platform#isRoot")
void testReadOnlyDirectory() throws Exception {
Path dir = tempDir.resolve("target");
File target = Files.createDirectory(dir).toFile();
// Make 'target' read-only
if (Files.getFileStore(dir).supportsFileAttributeView("posix")) {
PosixFileAttributeView view =
Files.getFileAttributeView(dir, PosixFileAttributeView.class);
Set<PosixFilePermission> perms = new HashSet<>();
perms.add(PosixFilePermission.OWNER_READ);
view.setPermissions(perms);
} else if (Files.getFileStore(dir).supportsFileAttributeView("acl")) {
AclFileAttributeView view = Files.getFileAttributeView(dir,
AclFileAttributeView.class);
List<AclEntry> entries = new ArrayList<>();
for (AclEntry entry : view.getAcl()) {
Set<AclEntryPermission> perms =
new HashSet<>(entry.permissions());
perms.remove(AclEntryPermission.ADD_FILE);
entries.add(AclEntry.newBuilder().setType(entry.type())
.setPrincipal(entry.principal()).setPermissions(perms)
.build());
}
view.setAcl(entries);
} else {
throw new RuntimeException("Required attribute view not supported");
}
assertThrows(IOException.class,
() -> File.createTempFile("readonly", null, target));
}
@Test
void testNonExistentDirectory() {
assertThrows(IOException.class,
() -> File.createTempFile("nonexistent", null, new File(tempDir.toFile(), "void")));
}
@Test
void testTargetIsFile() throws Exception {
File target = Files.createFile(tempDir.resolve("file")).toFile();
assertThrows(IOException.class,
() -> File.createTempFile("file", null, target));
}
}