1/*
2 * Created by: Jason Wessel <jason.wessel@windriver.com>
3 *
4 * Copyright (c) 2010 Wind River Systems, Inc.  All Rights Reserved.
5 *
6 * This file is licensed under the terms of the GNU General Public
7 * License version 2. This program is licensed "as is" without any
8 * warranty of any kind, whether express or implied.
9 */
10
11#include <linux/module.h>
12#include <linux/kdb.h>
13
14/*
15 * All kdb shell command call backs receive argc and argv, where
16 * argv[0] is the command the end user typed
17 */
18static int kdb_hello_cmd(int argc, const char **argv)
19{
20	if (argc > 1)
21		return KDB_ARGCOUNT;
22
23	if (argc)
24		kdb_printf("Hello %s.\n", argv[1]);
25	else
26		kdb_printf("Hello world!\n");
27
28	return 0;
29}
30
31
32static int __init kdb_hello_cmd_init(void)
33{
34	/*
35	 * Registration of a dynamically added kdb command is done with
36	 * kdb_register() with the arguments being:
37	 *   1: The name of the shell command
38	 *   2: The function that processes the command
39	 *   3: Description of the usage of any arguments
40	 *   4: Descriptive text when you run help
41	 *   5: Number of characters to complete the command
42	 *      0 == type the whole command
43	 *      1 == match both "g" and "go" for example
44	 */
45	kdb_register("hello", kdb_hello_cmd, "[string]",
46		     "Say Hello World or Hello [string]", 0);
47	return 0;
48}
49
50static void __exit kdb_hello_cmd_exit(void)
51{
52	kdb_unregister("hello");
53}
54
55module_init(kdb_hello_cmd_init);
56module_exit(kdb_hello_cmd_exit);
57
58MODULE_AUTHOR("WindRiver");
59MODULE_DESCRIPTION("KDB example to add a hello command");
60MODULE_LICENSE("GPL");
61