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#include <linux/init.h>
#include <linux/module.h>
#include <linux/fs.h>
static int major;
static int huhu_open(struct inode *node, struct file *f)
{
printk(KERN_INFO "huhu_open: done\n");
return 0;
}
static int huhu_release(struct inode *node, struct file *f)
{
printk(KERN_INFO "huhu_release: done\n");
return 0;
}
static ssize_t huhu_read(struct file *f, char __user *u, size_t s, loff_t *l)
{
printk(KERN_INFO "huhu_read\n");
return 0;
}
static ssize_t huhu_write (struct file *f, const char __user *u, size_t s,
loff_t *l)
{
printk(KERN_INFO "huhu_write\n");
return 0;
}
static const struct file_operations huhu_fops = {
.owner = THIS_MODULE,
.open = huhu_open,
.release = huhu_release,
.read = huhu_read,
.write = huhu_write,
};
static int huhu_init(void)
{
major = register_chrdev (0, "huhu", &huhu_fops);
if (major < 0)
{
printk(KERN_ERR "huhu_init: register_chrdev failed\n");
return major;
}
printk(KERN_INFO "mknod /dev/huhu c %d 0", major);
return 0;
}
static void huhu_exit(void)
{
unregister_chrdev (major, "huhu");
printk(KERN_INFO "huhu_exit: done\n");
}
module_init(huhu_init);
module_exit(huhu_exit);
MODULE_AUTHOR("Manuel Traut <manut@linutronix.de>");
MODULE_DESCRIPTION("a more or less useless module using char");
MODULE_LICENSE("GPL v2");
MODULE_VERSION("0815");
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