LXR linux/samples/kdb/kdb

   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 */
  18static 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
  31static kdbtab_t hello_cmd = {
  32        .name = "hello",
  33        .func = kdb_hello_cmd,
  34        .usage = "[string]",
  35        .help = "Say Hello World or Hello [string]",
  36};
  37
  38static int __init kdb_hello_cmd_init(void)
  39{
  40        /*
  41         * Registration of a dynamically added kdb command is done with
  42         * kdb_register().
  43         */
  44        kdb_register(&hello_cmd);
  45        return 0;
  46}
  47
  48static void __exit kdb_hello_cmd_exit(void)
  49{
  50        kdb_unregister(&hello_cmd);
  51}
  52
  53module_init(kdb_hello_cmd_init);
  54module_exit(kdb_hello_cmd_exit);
  55
  56MODULE_AUTHOR("WindRiver");
  57MODULE_DESCRIPTION("KDB example to add a hello command");
  58MODULE_LICENSE("GPL");
  59