8263898: (fs) Files.newOutputStream on the "NUL" special device throw…

…s FileSystemException: "nul: Incorrect function" (win)

src/java.base/windows/native/libnio/fs/WindowsNativeDispatcher.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2008, 2021, 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
@@ -521,8 +521,15 @@ Java_sun_nio_fs_WindowsNativeDispatcher_SetEndOfFile(JNIEnv* env, jclass this,
 {
     HANDLE h = (HANDLE)jlong_to_ptr(handle);
 
-    if (SetEndOfFile(h) == 0)
-        throwWindowsException(env, GetLastError());
+    if (SetEndOfFile(h) == 0) {
+        DWORD error = GetLastError();
+        LARGE_INTEGER size;
+        if (GetFileSizeEx(h, &size) == 0) {
+            throwWindowsException(env, GetLastError());
+        } else if (size.QuadPart != 0) {
+            throwWindowsException(env, error);
+        }
+    }
 }
 
 

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

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2021, 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.io.IOException;
+import java.io.OutputStream;
+import java.nio.file.Files;
+
+/* @test
+ * @bug 8263898
+ * @summary Verify a byte can be written to the null device.
+ * @run main NullDevice
+*/
+public class NullDevice {
+    public static void main(final String[] args) throws IOException {
+        System.getProperties().list(System.out);
+        final File f = new File("nul");
+        try (final OutputStream os = Files.newOutputStream(f.toPath())) {
+            os.write(0x02);
+            System.out.printf("Wrote a byte to %s%n", f);
+        }
+    }
+}