1 /*
   2  * Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 6893943 6937318
  27  * @summary exit code from javah with no args is 0
  28  * @modules jdk.compiler/com.sun.tools.javah
  29  */
  30 
  31 import java.io.*;
  32 import java.util.*;
  33 
  34 public class T6893943 {
  35     static final String[] NO_ARGS = { };
  36     static final String[] HELP = { "-help" };
  37     static final String NEWLINE = System.getProperty("line.separator");
  38 
  39     public static void main(String... args) throws Exception {
  40         new T6893943().run();
  41     }
  42 
  43     void run() throws Exception {
  44         testSimpleAPI(NO_ARGS, 1);
  45         testSimpleAPI(HELP, 0);
  46         testCommand(NO_ARGS, 1);
  47         testCommand(HELP, 0);
  48     }
  49 
  50     void testSimpleAPI(String[] args, int expect_rc) throws Exception {
  51         System.err.println("Test simple api: " + Arrays.asList(args));
  52         StringWriter sw = new StringWriter();
  53         PrintWriter pw = new PrintWriter(sw);
  54         int rc = com.sun.tools.javah.Main.run(args, pw);
  55         pw.close();
  56         expect("testSimpleAPI", sw.toString(), rc, expect_rc);
  57     }
  58 
  59     void testCommand(String[] args, int expect_rc) throws Exception {
  60         System.err.println("Test command: " + Arrays.asList(args));
  61         File javaHome = new File(System.getProperty("java.home"));
  62         List<String> command = new ArrayList<String>();
  63         command.add(new File(new File(javaHome, "bin"), "javah").getPath());
  64         command.addAll(Arrays.asList(args));
  65         //System.err.println("command: " + command);
  66 
  67         ProcessBuilder pb = new ProcessBuilder(command);
  68         pb.redirectErrorStream(true);
  69         Process p = pb.start();
  70         p.getOutputStream().close();
  71         StringWriter sw = new StringWriter();
  72         String line;
  73         BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
  74         while ((line = in.readLine()) != null)
  75             sw.write(line + NEWLINE);
  76         int rc = p.waitFor();
  77         expect("testCommand", sw.toString(), rc, expect_rc);
  78     }
  79 
  80     void expect(String name, String out, int actual_rc, int expect_rc) throws Exception {
  81         if (out.isEmpty())
  82             throw new Exception("No output from javah");
  83 
  84         if (!out.startsWith("Usage:")) {
  85             System.err.println(out);
  86             throw new Exception("Unexpected output from javah");
  87         }
  88 
  89         if (actual_rc != expect_rc)
  90             throw new Exception(name + ": unexpected exit: " + actual_rc + ", expected: " + expect_rc);
  91     }
  92 }