2.4下内核linux字符驱动模板

linux 字符驱动模板 2.4以下的内核适用。#include #include #include #include #include #include #include#define MAJOR_NUM 125#define DEVICE_NAME "emptychr"static ssize_t test_read（struct file *file,char *buf,size_t count,loff_t *f_pos） { return count; } static ssize_t test_write（struct file *file, const char *buf, size_t count, loff_t *f_pos） { return count; } static int test_open（struct inode *inode,struct file *file ） { MOD_INC_USE_COUNT; return 0; } static int test_release（struct inode *inode,struct file *file ） { MOD_DEC_USE_COUNT; return 0; } static int test_ioctl（struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg）{return 0; }struct file_operations test_fops = { read:test_read, write:test_write, open: test_open, release:test_release, ioctl:test_ioctl}; int test_init（void）{ int result; result = register_chrdev（MAJOR_NUM, DEVICE_NAME, &test_fops）; if （result < 0） { printk（KERN_INFO "test: can"t get major number "）; return result; }printk（"init module "）; return 0;} void test_exit（void）{ unregister_chrdev（MAJOR_NUM,DEVICE_NAME）; printk（"cleanup_module "）;}module_init（test_init）;module_exit（test_exit）;MODULE_LICENSE（"GPL"）; MODULE_AUTHOR（"huangxb"）;