43 lines
931 B
C
43 lines
931 B
C
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("hello world module");
|
|
|
|
#define FILENAME "fortytwo"
|
|
|
|
ssize_t dev_read(struct file *f, char __user *buf, size_t len, loff_t *off);
|
|
ssize_t dev_write(struct file *f, const char __user *buf, size_t len, loff_t *off);
|
|
|
|
static const struct file_operations fops = {
|
|
.owner = THIS_MODULE,
|
|
.read = dev_read,
|
|
.write = dev_write,
|
|
};
|
|
|
|
static struct miscdevice dev = {
|
|
.minor = MISC_DYNAMIC_MINOR,
|
|
.name = FILENAME,
|
|
.fops = &fops,
|
|
.mode = 0666,
|
|
};
|
|
|
|
static int __init fortytwo_init(void)
|
|
{
|
|
pr_info("creating fortytwo misc device\n");
|
|
return misc_register(&dev);
|
|
}
|
|
|
|
static void __exit fortytwo_exit(void)
|
|
{
|
|
pr_info("removing forytwo misc device\n");
|
|
misc_deregister(&dev);
|
|
}
|
|
|
|
module_init(fortytwo_init);
|
|
module_exit(fortytwo_exit);
|
|
|