6893932: javah help screen lists -h and -? but does not accept them

Reviewed-by: darcy

langtools/src/share/classes/com/sun/tools/javah/JavahTask.java

@@ -173,7 +173,7 @@ public class JavahTask implements NativeHeaderTool.NativeHeaderTask {
             }
         },
 
-        new Option(false, "-help", "--help", "-?") {
+        new Option(false, "-h", "-help", "--help", "-?") {
             void process(JavahTask task, String opt, String arg) {
                 task.help = true;
             }

langtools/test/tools/javah/TestHelpOpts.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2010, 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 6893932
+ * @summary javah help screen lists -h and -? but does not accept them
+ */
+
+import java.io.*;
+import java.util.*;
+
+public class TestHelpOpts {
+    public static void main(String... args) throws Exception {
+        new TestHelpOpts().run();
+    }
+
+    void run() throws Exception {
+        Locale prev = Locale.getDefault();
+        try {
+            Locale.setDefault(Locale.ENGLISH);
+
+            String[] opts = { "-h", "-help", "-?", "--help" };
+            for (String opt: opts)
+                test(opt);
+        } finally {
+            Locale.setDefault(prev);
+        }
+
+        if (errors > 0)
+            throw new Exception(errors + " errors occurred");
+    }
+
+    void test(String opt) {
+        System.err.println("test " + opt);
+        String[] args = { opt };
+
+        StringWriter sw = new StringWriter();
+        PrintWriter pw = new PrintWriter(sw);
+        int rc = com.sun.tools.javah.Main.run(args, pw);
+        pw.close();
+        String out = sw.toString();
+        if (!out.isEmpty())
+            System.err.println(out);
+        if (rc != 0)
+            error("Unexpected exit: rc=" + rc);
+
+        String flat = out.replaceAll("\\s+", " "); // canonicalize whitespace
+        if (!flat.contains("Usage: javah [options] <classes> where [options] include:"))
+            error("expected text not found");
+    }
+
+    void error(String msg) {
+        System.err.println(msg);
+        errors++;
+    }
+
+    int errors;
+}