X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?p=pintos-anon;a=blobdiff_plain;f=src%2Ffilesys%2Ffilesys.h;h=e87cbea5646933256e05b61f679f34d441b46e04;hp=064c5772bce39becfaeb3d0bf9eef8f5d37b0dc6;hb=615bf3b3d2a8573ed6fb9ddc0055745e163ac999;hpb=5780c9f434cca090f88463b7f0199d49b4ded288

diff --git a/src/filesys/filesys.h b/src/filesys/filesys.h
index 064c577..e87cbea 100644
--- a/src/filesys/filesys.h
+++ b/src/filesys/filesys.h
@@ -4,18 +4,19 @@
 #include <stdbool.h>
 #include "filesys/off_t.h"
 
+/* Sectors of system file inodes. */
+#define FREE_MAP_SECTOR 0       /* Free map file inode sector. */
+#define ROOT_DIR_SECTOR 1       /* Root directory file inode sector. */
+
 /* Disk used for filesystem. */
 extern struct disk *filesys_disk;
 
-/* The free map file, opened by filesys_init() and never
-   closed. */
-extern struct file *free_map_file;
-
 void filesys_init (bool format);
 void filesys_done (void);
 bool filesys_create (const char *name, off_t initial_size);
 struct file *filesys_open (const char *name);
 bool filesys_remove (const char *name);
+bool filesys_chdir (const char *name);
 bool filesys_list (void);
 
 void filesys_self_test (void);