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/WatchService/FileTreeModifier.java

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+/*
+ * Copyright (c) 2008, 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 4313887 6838333
+ * @summary Sanity test for JDK-specific FILE_TREE watch event modifier
+ * @requires (os.family == "windows")
+ * @library ..
+ * @modules jdk.unsupported
+ */
+
+import java.nio.file.*;
+import static java.nio.file.StandardWatchEventKinds.*;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.*;
+import java.util.concurrent.*;
+import static com.sun.nio.file.ExtendedWatchEventModifier.*;
+
+public class FileTreeModifier {
+
+    static void checkExpectedEvent(WatchService watcher,
+                                   WatchEvent.Kind<?> expectedType,
+                                   Object expectedContext)
+    {
+        WatchKey key;
+        try {
+            key = watcher.take();
+        } catch (InterruptedException x) {
+            // should not happen
+            throw new RuntimeException(x);
+        }
+        WatchEvent<?> event = key.pollEvents().iterator().next();
+        System.out.format("Event: type=%s, count=%d, context=%s\n",
+            event.kind(), event.count(), event.context());
+        if (event.kind() != expectedType)
+            throw new RuntimeException("unexpected event");
+        if (!expectedContext.equals(event.context()))
+            throw new RuntimeException("unexpected context");
+    }
+
+    static void doTest(Path top) throws IOException {
+        FileSystem fs = top.getFileSystem();
+        WatchService watcher = fs.newWatchService();
+
+        // create directories
+        Path subdir = Files.createDirectories(top.resolve("a").resolve("b").resolve("c"));
+
+        // Test ENTRY_CREATE with FILE_TREE modifier.
+
+        WatchKey key = top.register(watcher,
+            new WatchEvent.Kind<?>[]{ ENTRY_CREATE }, FILE_TREE);
+
+        // create file in a/b/c and check we get create event
+        Path file = Files.createFile(subdir.resolve("foo"));
+        checkExpectedEvent(watcher, ENTRY_CREATE, top.relativize(file));
+        key.reset();
+
+        // Test ENTRY_DELETE with FILE_TREE modifier.
+
+        WatchKey k = top.register(watcher,
+            new WatchEvent.Kind<?>[]{ ENTRY_DELETE }, FILE_TREE);
+        if (k != key)
+            throw new RuntimeException("Existing key not returned");
+
+        // delete a/b/c/foo and check we get delete event
+        Files.delete(file);
+        checkExpectedEvent(watcher, ENTRY_DELETE, top.relativize(file));
+        key.reset();
+
+        // Test changing registration to ENTRY_CREATE without modifier
+
+        k = top.register(watcher, new WatchEvent.Kind<?>[]{ ENTRY_CREATE });
+        if (k != key)
+            throw new RuntimeException("Existing key not returned");
+
+        // create a/b/c/foo
+        Files.createFile(file);
+
+        // check that key is not queued
+        WatchKey nextKey;
+        try {
+            nextKey = watcher.poll(3, TimeUnit.SECONDS);
+        } catch (InterruptedException e) {
+            throw new RuntimeException();
+        }
+        if (nextKey != null)
+            throw new RuntimeException("WatchKey not expected to be polled");
+
+        // create bar and check we get create event
+        file = Files.createFile(top.resolve("bar"));
+        checkExpectedEvent(watcher, ENTRY_CREATE, top.relativize(file));
+        key.reset();
+
+        // Test changing registration to <all> with FILE_TREE modifier
+
+        k = top.register(watcher,
+            new WatchEvent.Kind<?>[]{ ENTRY_CREATE, ENTRY_DELETE, ENTRY_MODIFY },
+            FILE_TREE);
+        if (k != key)
+            throw new RuntimeException("Existing key not returned");
+
+        // modify bar and check we get modify event
+        try (OutputStream out = Files.newOutputStream(file)) {
+            out.write("Double shot expresso please".getBytes("UTF-8"));
+        }
+        checkExpectedEvent(watcher, ENTRY_MODIFY, top.relativize(file));
+        key.reset();
+    }
+
+
+    public static void main(String[] args) throws IOException {
+        Path dir = TestUtil.createTemporaryDirectory();
+        try {
+            doTest(dir);
+        } finally {
+            TestUtil.removeAll(dir);
+        }
+    }
+}