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4aad8f51 JW |
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 | ||
32 | static 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 | ||
50 | static void __exit kdb_hello_cmd_exit(void) | |
51 | { | |
52 | kdb_unregister("hello"); | |
53 | } | |
54 | ||
55 | module_init(kdb_hello_cmd_init); | |
56 | module_exit(kdb_hello_cmd_exit); | |
57 | ||
58 | MODULE_AUTHOR("WindRiver"); | |
59 | MODULE_DESCRIPTION("KDB example to add a hello command"); | |
60 | MODULE_LICENSE("GPL"); |