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 */
18 static 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 static kdbtab_t hello_cmd = {
32 .name = "hello",
33 .func = kdb_hello_cmd,
34 .usage = "[string]",
35 .help = "Say Hello World or Hello [string]",
36 };
37
38 static int __init kdb_hello_cmd_init(void)
39 {
40 /*
41 * Registration of a dynamically added kdb command is done with
42 * kdb_register().
43 */
44 kdb_register(&hello_cmd);
45 return 0;
46 }
47
48 static void __exit kdb_hello_cmd_exit(void)
49 {
50 kdb_unregister(&hello_cmd);
51 }
52
53 module_init(kdb_hello_cmd_init);
54 module_exit(kdb_hello_cmd_exit);
55
56 MODULE_AUTHOR("WindRiver");
57 MODULE_DESCRIPTION("KDB example to add a hello command");
58 MODULE_LICENSE("GPL");
59
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