#define NAME_MAX 14
struct inode;
-struct dir;
+
+/* Opening and closing directories. */
bool dir_create (disk_sector_t sector, size_t entry_cnt);
-bool dir_open (struct inode *, struct dir **);
-bool dir_open_root (struct dir **);
+struct dir *dir_open (struct inode *);
+struct dir *dir_open_root (void);
+struct dir *dir_reopen (struct dir *);
void dir_close (struct dir *);
+struct inode *dir_get_inode (struct dir *);
+
+/* Reading and writing. */
bool dir_lookup (const struct dir *, const char *name, struct inode **);
bool dir_add (struct dir *, const char *name, disk_sector_t);
bool dir_remove (struct dir *, const char *name);
-void dir_list (const struct dir *);
+bool dir_readdir (struct dir *, char name[NAME_MAX + 1]);
#endif /* filesys/directory.h */