Release 4.7 samples/kdb/kdb_hello.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;
}


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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;
}

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static void __exit kdb_hello_cmd_exit(void)
{
	kdb_unregister("hello");
}

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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");
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Directory: samples/kdb

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