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.
2026-03-26 17:11:57 -04:00 · 2026-03-26 17:11:57 -04:00 · 0a580b313d
commit 0a580b313d
70422 changed files with 17213626 additions and 0 deletions
--- a/test/jdk/java/nio/file/Files/SymlinkTime.java
+++ b/test/jdk/java/nio/file/Files/SymlinkTime.java
@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2019, 2024, 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 8220793
+ * @summary Unit test for updating access and modification times of symlinks
+ * @requires (os.family == "linux" | os.family == "mac" | os.family == "windows")
+ * @library ..
+ * @build SymlinkTime
+ * @run main/othervm SymlinkTime
+ */
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.file.attribute.BasicFileAttributeView;
+import java.nio.file.attribute.FileTime;
+
+public class SymlinkTime {
+    public static void main(String[] args) throws IOException {
+        Path dir = TestUtil.createTemporaryDirectory();
+        if (!TestUtil.supportsSymbolicLinks(dir)) {
+            System.out.println("Links not supported: skipping test");
+            return;
+        }
+
+        try {
+            // Create file and symbolic link to it
+            final Path file = dir.resolve("file");
+            final Path link = dir.resolve("link");
+            Files.createFile(file);
+            try {
+                // Delay creating the link to get different time attributes
+                Thread.currentThread().sleep(5000);
+            } catch (InterruptedException ignored) {
+            }
+            Files.createSymbolicLink(link, file);
+
+            // Save file modification and access times
+            BasicFileAttributeView view = Files.getFileAttributeView(link,
+                BasicFileAttributeView.class);
+            BasicFileAttributes attr = view.readAttributes();
+            printTimes("Original file times", attr);
+            FileTime fileModTime = attr.lastModifiedTime();
+            FileTime fileAccTime = attr.lastAccessTime();
+
+            // Read link modification and access times
+            view = Files.getFileAttributeView(link,
+                BasicFileAttributeView.class, LinkOption.NOFOLLOW_LINKS);
+            attr = view.readAttributes();
+            printTimes("Original link times", attr);
+
+            // Set new base time and offset increment
+            long base = 1000000000000L; // 2001-09-09T01:46:40Z
+            long delta = 1000*60L;
+
+            // Set new link modification and access times
+            FileTime linkModTime = FileTime.fromMillis(base + delta);
+            FileTime linkAccTime = FileTime.fromMillis(base + 2L*delta);
+            view.setTimes(linkModTime, linkAccTime, null);
+
+            // Verify link modification and access times updated correctly
+            view = Files.getFileAttributeView(link,
+                BasicFileAttributeView.class, LinkOption.NOFOLLOW_LINKS);
+            attr = view.readAttributes();
+            printTimes("Updated link times", attr);
+            check("Link", attr, linkModTime, linkAccTime);
+
+            // Verify file modification and access times unchanged
+            view = Files.getFileAttributeView(file,
+                BasicFileAttributeView.class);
+            attr = view.readAttributes();
+            printTimes("File times", attr);
+            check("File", attr, fileModTime, fileAccTime);
+        } finally {
+            TestUtil.removeAll(dir);
+        }
+    }
+
+    private static void check(String pathType, BasicFileAttributes attr,
+        FileTime modTimeExpected, FileTime accTimeExpected) {
+        if (!attr.lastModifiedTime().equals(modTimeExpected) ||
+            !attr.lastAccessTime().equals(accTimeExpected)) {
+            String message = String.format(
+                "%s - modification time: expected %s, actual %s;%n" +
+                "access time: expected %s, actual %s.%n", pathType,
+                modTimeExpected, attr.lastModifiedTime(),
+                accTimeExpected, attr.lastAccessTime());
+            throw new RuntimeException(message);
+        }
+    }
+
+    private static void printTimes(String label, BasicFileAttributes attr) {
+        System.out.format
+            ("%s%ncreation:     %s%nmodification: %s%naccess:       %s%n%n",
+            label, attr.creationTime(), attr.lastModifiedTime(),
+            attr.lastAccessTime());
+    }
+}