ioctl_example.c File Reference

An example loadable kernel module (LKM) that can display a message in the /var/log/[kern.log|messages] file when the module is loaded and removed. The module can accept an argument when it is loaded – the name, which appears in the kernel log files. More...

#include "config.h"
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>

Include dependency graph for ioctl_example.c:

Go to the source code of this file.

Functions
	MODULE_LICENSE (LIBJMMCG_MODULE_LICENSE)
	The license type – this affects runtime behavior. More...
	MODULE_AUTHOR (LIBJMMCG_MODULE_AUTHOR)
	The author – visible when you use modinfo. More...
	MODULE_DESCRIPTION (LIBJMMCG_MODULE_DESCRIPTION)
	The description – see modinfo. More...
	MODULE_VERSION (LIBJMMCG_MODULE_VERSION)
	The version of the module. More...
	module_param (name, charp, S_IRUGO)
	Param desc. charp = char ptr, S_IRUGO can be read/not changed. More...
	MODULE_PARM_DESC (name, "The module name to display in /var/log/kern.log")
	Parameter description. More...
	module_init (init_the_module)
	A module must use the module_init() module_exit() macros from linux/init.h, which identify the initialization function at insertion time and the cleanup function (as listed above). More...
	module_exit (exit_the_module)

Detailed Description

An example loadable kernel module (LKM) that can display a message in the /var/log/[kern.log|messages] file when the module is loaded and removed. The module can accept an argument when it is loaded – the name, which appears in the kernel log files.

Details for how to create this came from:

1. aaaa

Definition in file ioctl_example.c.

Function Documentation

MODULE_AUTHOR()

MODULE_AUTHOR

(

LIBJMMCG_MODULE_AUTHOR

)

The author – visible when you use modinfo.

MODULE_DESCRIPTION()

MODULE_DESCRIPTION

(

LIBJMMCG_MODULE_DESCRIPTION

)

The description – see modinfo.

module_exit()

module_exit

(

exit_the_module

)

module_init()

module_init

(

init_the_module

)

A module must use the module_init() module_exit() macros from linux/init.h, which identify the initialization function at insertion time and the cleanup function (as listed above).

MODULE_LICENSE()

MODULE_LICENSE

(

LIBJMMCG_MODULE_LICENSE

)

The license type – this affects runtime behavior.

module_param()

module_param	(	name	,
		charp	,
		S_IRUGO
	)

Param desc. charp = char ptr, S_IRUGO can be read/not changed.

MODULE_PARM_DESC()

MODULE_PARM_DESC	(	name	,
		"The module name to display in /var/log/kern.log"
	)

Parameter description.

MODULE_VERSION()

MODULE_VERSION

(

LIBJMMCG_MODULE_VERSION

)

The version of the module.