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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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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>
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/*
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* Created by: Jason Wessel <jason.wessel@windriver.com>
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*
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* Copyright (c) 2010 Wind River Systems, Inc. All Rights Reserved.
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <linux/module.h>
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#include <linux/kdb.h>
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/*
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* All kdb shell command call backs receive argc and argv, where
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* argv[0] is the command the end user typed
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*/
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static int kdb_hello_cmd(int argc, const char **argv)
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{
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if (argc > 1)
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return KDB_ARGCOUNT;
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if (argc)
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kdb_printf("Hello %s.\n", argv[1]);
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else
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kdb_printf("Hello world!\n");
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return 0;
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}
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static int __init kdb_hello_cmd_init(void)
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{
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/*
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* Registration of a dynamically added kdb command is done with
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* kdb_register() with the arguments being:
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* 1: The name of the shell command
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* 2: The function that processes the command
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* 3: Description of the usage of any arguments
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* 4: Descriptive text when you run help
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* 5: Number of characters to complete the command
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* 0 == type the whole command
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* 1 == match both "g" and "go" for example
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*/
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kdb_register("hello", kdb_hello_cmd, "[string]",
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"Say Hello World or Hello [string]", 0);
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return 0;
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}
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static void __exit kdb_hello_cmd_exit(void)
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{
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kdb_unregister("hello");
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}
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module_init(kdb_hello_cmd_init);
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module_exit(kdb_hello_cmd_exit);
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MODULE_AUTHOR("WindRiver");
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MODULE_DESCRIPTION("KDB example to add a hello command");
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MODULE_LICENSE("GPL");
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