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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"); |
61 |
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v2.6.34-rc5
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