/*
   * Created by: Jason Wessel <jason.wessel@windriver.com>
   *
   * Copyright (c) 2010 Wind River Systems, Inc.  All Rights Reserved.
   *
   * This file is licensed under the terms of the GNU General Public
   * License version 2. This program is licensed "as is" without any
   * warranty of any kind, whether express or implied.
   */
  
  #include <linux/module.h>
  #include <linux/kdb.h>
  
  /*
   * All kdb shell command call backs receive argc and argv, where
   * argv[0] is the command the end user typed
   */
  static int kdb_hello_cmd(int argc, const char **argv)
  {
  	if (argc > 1)
  		return KDB_ARGCOUNT;
  
  	if (argc)
  		kdb_printf("Hello %s.
  ", argv[1]);
  	else
  		kdb_printf("Hello world!
  ");
  
  	return 0;
  }
  
  
  static int __init kdb_hello_cmd_init(void)
  {
  	/*
  	 * Registration of a dynamically added kdb command is done with
  	 * kdb_register() with the arguments being:
  	 *   1: The name of the shell command
  	 *   2: The function that processes the command
  	 *   3: Description of the usage of any arguments
  	 *   4: Descriptive text when you run help
  	 *   5: Number of characters to complete the command
  	 *      0 == type the whole command
  	 *      1 == match both "g" and "go" for example
  	 */
  	kdb_register("hello", kdb_hello_cmd, "[string]",
  		     "Say Hello World or Hello [string]", 0);
  	return 0;
  }
  
  static void __exit kdb_hello_cmd_exit(void)
  {
  	kdb_unregister("hello");
  }
  
  module_init(kdb_hello_cmd_init);
  module_exit(kdb_hello_cmd_exit);
  
  MODULE_AUTHOR("WindRiver");
  MODULE_DESCRIPTION("KDB example to add a hello command");
  MODULE_LICENSE("GPL");