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.

test/jdk/java/nio/file/Files/SetLastModifiedTime.java

@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2014, 2026, 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.
+ */
+
+import java.io.File;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.attribute.FileTime;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertSame;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * @test
+ * @bug 4313887 8062949 8191872
+ * @library ..
+ * @run junit SetLastModifiedTime
+ * @summary Unit test for Files.setLastModifiedTime
+ */
+
+public class SetLastModifiedTime {
+
+    static Path testDir;
+
+    @BeforeAll
+    static void createTestDirectory() throws Exception {
+        testDir = TestUtil.createTemporaryDirectory();
+    }
+
+    @AfterAll
+    static void removeTestDirectory() throws Exception {
+        TestUtil.removeAll(testDir);
+    }
+
+    /**
+     * Exercise Files.setLastModifiedTime on the given file
+     */
+    void test(Path path) throws Exception {
+        FileTime now = Files.getLastModifiedTime(path);
+        FileTime zero = FileTime.fromMillis(0L);
+
+        Path result = Files.setLastModifiedTime(path, zero);
+        assertSame(path, result);
+        assertEquals(zero, Files.getLastModifiedTime(path));
+
+        result = Files.setLastModifiedTime(path, now);
+        assertSame(path, result);
+        assertEquals(now, Files.getLastModifiedTime(path));
+    }
+
+    @Test
+    public void testRegularFile() throws Exception {
+        Path file = Files.createFile(testDir.resolve("file"));
+        test(file);
+    }
+
+    @Test
+    public void testDirectory() throws Exception {
+        Path dir = Files.createDirectory(testDir.resolve("dir"));
+        test(dir);
+    }
+
+    @Test
+    public void testSymbolicLink() throws Exception {
+        if (TestUtil.supportsSymbolicLinks(testDir)) {
+            Path target = Files.createFile(testDir.resolve("target"));
+            Path link = testDir.resolve("link");
+            Files.createSymbolicLink(link, target);
+            test(link);
+        }
+    }
+
+    @Test
+    public void testNulls() throws Exception {
+        Path path = Paths.get("foo");
+        FileTime zero = FileTime.fromMillis(0L);
+
+        assertThrows(NullPointerException.class,
+                     () -> Files.setLastModifiedTime(null, zero));
+
+        assertThrows(NullPointerException.class,
+                     () -> Files.setLastModifiedTime(path, null));
+
+        assertThrows(NullPointerException.class,
+                     () -> Files.setLastModifiedTime(null, null));
+    }
+
+    @Test
+    public void testCompare() throws Exception {
+        Path path = Files.createFile(testDir.resolve("path"));
+        long timeMillis = 1512520600195L;
+        FileTime fileTime = FileTime.fromMillis(timeMillis);
+        Files.setLastModifiedTime(path, fileTime);
+        File file = path.toFile();
+        long ioTime = file.lastModified();
+        long nioTime = Files.getLastModifiedTime(path).toMillis();
+        assertTrue(ioTime == timeMillis || ioTime == 1000*(timeMillis/1000),
+            "File.lastModified() not in {time, 1000*(time/1000)}");
+        assertEquals(ioTime, nioTime,
+            "File.lastModified() != Files.getLastModifiedTime().toMillis()");
+    }
+}
+