#include
#include
#include
#include
#include
#include
#include
#include

struct?cdev?chrdev;
unsigned?int?major=0;
unsigned?int?minor=0;
dev_t?dev_no;
int?ret;

int?my_open（struct?inode?*istruct?file?*f）{
	printk（“cdev?init\n“）;
	return?0;
}

int?my_release（struct?inode?*istruct?file?*f）{
	printk（“cdev?release\n“）;
	return?0;
}

static?ssize_t?my_write（struct?file?*fconst?char?__user?*usize_t?lloff_t?*o）{
	char?buf[100];
	copy_from_user（buful）;
	printk（KERN_EMERG“write?string:%s“buf）;
	return?l;
}

static?ssize_t?my_read（struct?file?*fchar?__user?*usize_t?lloff_t?*o）{
	char?*buf=“hellouser!“;
	copy_to_user（ubufstrlen（buf））;
	printk（KERN_EMERG“read?string:%s“buf）;
	return?l;
}

struct?file_operations?fops={
	.owner=THIS_MODULE
	.open=my_open
	.release=my_release
	.write=my_write
	.read=my_read
};

static?int?my_init（void）{
	dev_no=MKDEV（majorminor）;
	if（dev_no>0）{
		ret=register_chrdev_region（dev_no1“demo1“）;
	}else{
		ret=alloc_chrdev_region（&dev_no01“demo1“）;
	}
	if（ret<0）{
		return?ret;
	}
	cdev_init（&chrdev&fops）;
	chrdev.owner=THIS_MODULE;
	cdev_add（&chrdevdev_no1）;
	return?0;
}

static?void?my_exit（void）{
	unregister_chrdev_region（dev_no1）;
	cdev_del（&chrdev）;
}

module_init（my_init）;
module_exit（my_exit）;

MODULE_AUTHOR（“guoz“）;
MODULE_DEscriptION（“this?ostest?demo1“）;
MODULE_LICENSE（“GPL“）;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-01-30?12:58??2016112135_李匯遠（os）\
?????文件??????303150??2019-01-30?12:51??2016112135_李匯遠（os）\2016112135_李匯遠（os）.doc
?????目錄???????????0??2019-01-30?12:56??2016112135_李匯遠（os）\demo1_chardevice\
?????文件????????1470??2019-01-29?11:53??2016112135_李匯遠（os）\demo1_chardevice\demo1.c
?????文件?????????251??2019-01-29?10:15??2016112135_李匯遠（os）\demo1_chardevice\Makefile
?????文件?????????323??2019-01-30?10:42??2016112135_李匯遠（os）\demo1_chardevice\test.c
?????目錄???????????0??2019-01-30?12:57??2016112135_李匯遠（os）\demo2_blockdevice\
?????文件????????2684??2019-01-30?11:41??2016112135_李匯遠（os）\demo2_blockdevice\demo2.c
?????文件?????????251??2019-01-29?16:31??2016112135_李匯遠（os）\demo2_blockdevice\Makefile