forked from mirrors/linux
4aad8f51d0
Add an example of how to add a dynamic kdb shell command via a kernel module. Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/*
|
|
* 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.\n", argv[1]);
|
|
else
|
|
kdb_printf("Hello world!\n");
|
|
|
|
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");
|