4 #include "filesys/off_t.h"
8 /* Opening and closing files. */
9 struct file *file_open (struct inode *);
10 struct file *file_reopen (struct file *);
11 void file_close (struct file *);
12 struct inode *file_get_inode (struct file *);
14 /* Reading and writing. */
15 off_t file_read (struct file *, void *, off_t);
16 off_t file_read_at (struct file *, void *, off_t size, off_t start);
17 off_t file_write (struct file *, const void *, off_t);
18 off_t file_write_at (struct file *, const void *, off_t size, off_t start);
20 /* Preventing writes. */
21 void file_deny_write (struct file *);
22 void file_allow_write (struct file *);
25 void file_seek (struct file *, off_t);
26 off_t file_tell (struct file *);
27 off_t file_length (struct file *);
29 #endif /* filesys/file.h */