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struct file_operations {

int (*seek) (struct inode * ,struct file *, off_t ,int);

int (*read) (struct inode * ,struct file *, char ,int);

int (*write) (struct inode * ,struct file *, off_t ,int);

int (*readdir) (struct inode * ,struct file *, struct dirent * ,int);

int (*select) (struct inode * ,struct file *, int ,select_table *);

int (*ioctl) (struct inode * ,struct file *, unsined int ,unsigned long

int (*mmap) (struct inode * ,struct file *, struct vm_area_struct *);

int (*open) (struct inode * ,struct file *);

int (*release) (struct inode * ,struct file *);

int (*fsync) (struct inode * ,struct file *);

int (*fasync) (struct inode * ,struct file *,int);

int (*check_media_change) (struct inode * ,struct file *);

int (*revalidate) (dev_t dev);

}