kdb_hello.c
1.51 KB
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/*
* 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");