basic/kernel_param/kernel_param.c · microff/LearningLinuxKernel

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LearningLinuxKernel

basic

kernel_param

kernel_param.c

kernel_param.c 1.30 KB

/**********************************************************
 * Author : 梁金荣
 * Email : Liangjinrong111@163.com
 * Last modified : 2019年09月14日 13:00
 * Filename : exnum.c
 * Description : 模块初始化函数中求最大数(使用内核中的代码)
 * *******************************************************/

/**
 *必要的头文件
 */
#include<linux/kernel.h>
#include<linux/module.h>
#include<linux/init.h>

static int a,b ;
module_param(a, int, 0644);
MODULE_PARM_DESC(a, "data of a");
module_param(b, int, 0644);
MODULE_PARM_DESC(b, "data of b");
/**
 *模块的初始化函数,模块的入口函数,加载模块,需超级用户权限
 */
static int __init lk_exnum(void)
{
		printk("Linux kernel param max number module is starting here!\n");
		printk("a = %d, b = %d\n", a, b);
 printk("max=%d\n", max(a,b));
	return 0;
}

/**
 *出口函数,卸载模块,需超级用户权限
 */
static void __exit lk_exit(void)
{
	printk("Linux kernel param max number moudle has exited!\n");
}

module_init(lk_exnum); //内核入口点,调用初始化函数,包含在module.h中
module_exit(lk_exit); //出口点
MODULE_LICENSE("GPL"); //许可证
MODULE_AUTHOR("ljr"); //作者(非必须)
MODULE_DESCRIPTION("Linux kernel param max number"); //模块描述(非必须)

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nlage authored 2022年01月04日 15:31 +08:00 . rename.

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/**********************************************************
 * Author : 梁金荣
 * Email : Liangjinrong111@163.com
 * Last modified : 2019年09月14日 13:00
 * Filename : exnum.c
 * Description : 模块初始化函数中求最大数(使用内核中的代码)
 * *******************************************************/

/**
 *必要的头文件
 */
#include<linux/kernel.h>
#include<linux/module.h>
#include<linux/init.h>

static int a,b ;
module_param(a, int, 0644);
MODULE_PARM_DESC(a, "data of a");
module_param(b, int, 0644);
MODULE_PARM_DESC(b, "data of b");
/**
 *模块的初始化函数,模块的入口函数,加载模块,需超级用户权限
 */
static int __init lk_exnum(void)
{
		printk("Linux kernel param max number module is starting here!\n");
		printk("a = %d, b = %d\n", a, b);
 printk("max=%d\n", max(a,b));
	return 0;
}

/**
 *出口函数,卸载模块,需超级用户权限
 */
static void __exit lk_exit(void)
{
	printk("Linux kernel param max number moudle has exited!\n");
}

module_init(lk_exnum); //内核入口点,调用初始化函数,包含在module.h中
module_exit(lk_exit); //出口点
MODULE_LICENSE("GPL"); //许可证
MODULE_AUTHOR("ljr"); //作者(非必须)
MODULE_DESCRIPTION("Linux kernel param max number"); //模块描述(非必须)