4 * R/O (V)FAT 12/16/32 filesystem implementation by Marcus Sundberg
6 * 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6
7 * 2003-03-10 - kharris@nexus-tech.net - ported to uboot
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
31 #include <asm/byteorder.h>
34 #if (CONFIG_COMMANDS & CFG_CMD_FAT)
37 * Convert a string to lowercase.
42 while (*str
!= '\0') {
48 static block_dev_desc_t
*cur_dev
= NULL
;
49 static unsigned long part_offset
= 0;
50 static int cur_part
= 1;
52 #define DOS_PART_TBL_OFFSET 0x1be
53 #define DOS_PART_MAGIC_OFFSET 0x1fe
54 #define DOS_FS_TYPE_OFFSET 0x36
56 int disk_read (__u32 startblock
, __u32 getsize
, __u8
* bufptr
)
58 startblock
+= part_offset
;
61 if (cur_dev
->block_read
) {
62 return cur_dev
->block_read (cur_dev
->dev
, startblock
, getsize
, (unsigned long *)bufptr
);
69 fat_register_device(block_dev_desc_t
*dev_desc
, int part_no
)
71 unsigned char buffer
[SECTOR_SIZE
];
73 if (!dev_desc
->block_read
)
76 /* check if we have a MBR (on floppies we have only a PBR) */
77 if (dev_desc
->block_read (dev_desc
->dev
, 0, 1, (ulong
*) buffer
) != 1) {
78 printf ("** Can't read from device %d **\n", dev_desc
->dev
);
81 if (buffer
[DOS_PART_MAGIC_OFFSET
] != 0x55 ||
82 buffer
[DOS_PART_MAGIC_OFFSET
+ 1] != 0xaa) {
83 /* no signature found */
86 if(!strncmp((char *)&buffer
[DOS_FS_TYPE_OFFSET
],"FAT",3)) {
87 /* ok, we assume we are on a PBR only */
92 #if (CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI) || \
93 (CONFIG_COMMANDS & CFG_CMD_USB) || defined(CONFIG_SYSTEMACE)
94 disk_partition_t info
;
95 if(!get_partition_info(dev_desc
, part_no
, &info
)) {
96 part_offset
= info
.start
;
100 printf ("** Partition %d not valid on device %d **\n",part_no
,dev_desc
->dev
);
104 /* FIXME we need to determine the start block of the
105 * partition where the DOS FS resides. This can be done
106 * by using the get_partition_info routine. For this
107 * purpose the libpart must be included.
118 * Get the first occurence of a directory delimiter ('/' or '\') in a string.
119 * Return index into string if found, -1 otherwise.
126 while (*str
!= '\0') {
127 if (ISDIRDELIM(*str
)) return str
- start
;
135 * Match volume_info fs_type strings.
136 * Return 0 on match, -1 otherwise.
139 compare_sign(char *str1
, char *str2
)
141 char *end
= str1
+SIGNLEN
;
143 while (str1
!= end
) {
144 if (*str1
!= *str2
) {
156 * Extract zero terminated short name from a directory entry.
158 static void get_name (dir_entry
*dirent
, char *s_name
)
162 memcpy (s_name
, dirent
->name
, 8);
165 while (*ptr
&& *ptr
!= ' ')
167 if (dirent
->ext
[0] && dirent
->ext
[0] != ' ') {
170 memcpy (ptr
, dirent
->ext
, 3);
172 while (*ptr
&& *ptr
!= ' ')
176 if (*s_name
== DELETED_FLAG
)
178 else if (*s_name
== aRING
)
184 * Get the entry at index 'entry' in a FAT (12/16/32) table.
185 * On failure 0x00 is returned.
188 get_fatent(fsdata
*mydata
, __u32 entry
)
194 switch (mydata
->fatsize
) {
196 bufnum
= entry
/ FAT32BUFSIZE
;
197 offset
= entry
- bufnum
* FAT32BUFSIZE
;
200 bufnum
= entry
/ FAT16BUFSIZE
;
201 offset
= entry
- bufnum
* FAT16BUFSIZE
;
204 bufnum
= entry
/ FAT12BUFSIZE
;
205 offset
= entry
- bufnum
* FAT12BUFSIZE
;
209 /* Unsupported FAT size */
213 /* Read a new block of FAT entries into the cache. */
214 if (bufnum
!= mydata
->fatbufnum
) {
215 int getsize
= FATBUFSIZE
/FS_BLOCK_SIZE
;
216 __u8
*bufptr
= mydata
->fatbuf
;
217 __u32 fatlength
= mydata
->fatlength
;
218 __u32 startblock
= bufnum
* FATBUFBLOCKS
;
220 fatlength
*= SECTOR_SIZE
; /* We want it in bytes now */
221 startblock
+= mydata
->fat_sect
; /* Offset from start of disk */
223 if (getsize
> fatlength
) getsize
= fatlength
;
224 if (disk_read(startblock
, getsize
, bufptr
) < 0) {
225 FAT_DPRINT("Error reading FAT blocks\n");
228 mydata
->fatbufnum
= bufnum
;
231 /* Get the actual entry from the table */
232 switch (mydata
->fatsize
) {
234 ret
= FAT2CPU32(((__u32
*)mydata
->fatbuf
)[offset
]);
237 ret
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[offset
]);
240 __u32 off16
= (offset
*3)/4;
243 switch (offset
& 0x3) {
245 ret
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);
249 val1
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);
251 val2
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
+1]);
253 ret
= (val2
<< 4) | (val1
>> 12);
256 val1
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);
258 val2
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
+1]);
260 ret
= (val2
<< 8) | (val1
>> 8);
263 ret
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);;
264 ret
= (ret
& 0xfff0) >> 4;
272 FAT_DPRINT("ret: %d, offset: %d\n", ret
, offset
);
279 * Read at most 'size' bytes from the specified cluster into 'buffer'.
280 * Return 0 on success, -1 otherwise.
283 get_cluster(fsdata
*mydata
, __u32 clustnum
, __u8
*buffer
, unsigned long size
)
289 startsect
= mydata
->data_begin
+ clustnum
*mydata
->clust_size
;
291 startsect
= mydata
->rootdir_sect
;
294 FAT_DPRINT("gc - clustnum: %d, startsect: %d\n", clustnum
, startsect
);
295 if (disk_read(startsect
, size
/FS_BLOCK_SIZE
, buffer
) < 0) {
296 FAT_DPRINT("Error reading data\n");
299 if(size
% FS_BLOCK_SIZE
) {
300 __u8 tmpbuf
[FS_BLOCK_SIZE
];
301 idx
= size
/FS_BLOCK_SIZE
;
302 if (disk_read(startsect
+ idx
, 1, tmpbuf
) < 0) {
303 FAT_DPRINT("Error reading data\n");
306 buffer
+= idx
*FS_BLOCK_SIZE
;
308 memcpy(buffer
, tmpbuf
, size
% FS_BLOCK_SIZE
);
317 * Read at most 'maxsize' bytes from the file associated with 'dentptr'
319 * Return the number of bytes read or -1 on fatal errors.
322 get_contents(fsdata
*mydata
, dir_entry
*dentptr
, __u8
*buffer
,
323 unsigned long maxsize
)
325 unsigned long filesize
= FAT2CPU32(dentptr
->size
), gotsize
= 0;
326 unsigned int bytesperclust
= mydata
->clust_size
* SECTOR_SIZE
;
327 __u32 curclust
= START(dentptr
);
328 __u32 endclust
, newclust
;
329 unsigned long actsize
;
331 FAT_DPRINT("Filesize: %ld bytes\n", filesize
);
333 if (maxsize
> 0 && filesize
> maxsize
) filesize
= maxsize
;
335 FAT_DPRINT("Reading: %ld bytes\n", filesize
);
337 actsize
=bytesperclust
;
340 /* search for consecutive clusters */
341 while(actsize
< filesize
) {
342 newclust
= get_fatent(mydata
, endclust
);
343 if((newclust
-1)!=endclust
)
345 if (newclust
<= 0x0001 || newclust
>= 0xfff0) {
346 FAT_DPRINT("curclust: 0x%x\n", newclust
);
347 FAT_DPRINT("Invalid FAT entry\n");
351 actsize
+= bytesperclust
;
353 /* actsize >= file size */
354 actsize
-= bytesperclust
;
355 /* get remaining clusters */
356 if (get_cluster(mydata
, curclust
, buffer
, (int)actsize
) != 0) {
357 FAT_ERROR("Error reading cluster\n");
360 /* get remaining bytes */
361 gotsize
+= (int)actsize
;
365 if (get_cluster(mydata
, endclust
, buffer
, (int)actsize
) != 0) {
366 FAT_ERROR("Error reading cluster\n");
372 if (get_cluster(mydata
, curclust
, buffer
, (int)actsize
) != 0) {
373 FAT_ERROR("Error reading cluster\n");
376 gotsize
+= (int)actsize
;
379 curclust
= get_fatent(mydata
, endclust
);
380 if (curclust
<= 0x0001 || curclust
>= 0xfff0) {
381 FAT_DPRINT("curclust: 0x%x\n", curclust
);
382 FAT_ERROR("Invalid FAT entry\n");
385 actsize
=bytesperclust
;
391 #ifdef CONFIG_SUPPORT_VFAT
393 * Extract the file name information from 'slotptr' into 'l_name',
394 * starting at l_name[*idx].
395 * Return 1 if terminator (zero byte) is found, 0 otherwise.
398 slot2str(dir_slot
*slotptr
, char *l_name
, int *idx
)
402 for (j
= 0; j
<= 8; j
+= 2) {
403 l_name
[*idx
] = slotptr
->name0_4
[j
];
404 if (l_name
[*idx
] == 0x00) return 1;
407 for (j
= 0; j
<= 10; j
+= 2) {
408 l_name
[*idx
] = slotptr
->name5_10
[j
];
409 if (l_name
[*idx
] == 0x00) return 1;
412 for (j
= 0; j
<= 2; j
+= 2) {
413 l_name
[*idx
] = slotptr
->name11_12
[j
];
414 if (l_name
[*idx
] == 0x00) return 1;
423 * Extract the full long filename starting at 'retdent' (which is really
424 * a slot) into 'l_name'. If successful also copy the real directory entry
426 * Return 0 on success, -1 otherwise.
428 __u8 get_vfatname_block
[MAX_CLUSTSIZE
];
430 get_vfatname(fsdata
*mydata
, int curclust
, __u8
*cluster
,
431 dir_entry
*retdent
, char *l_name
)
434 dir_slot
*slotptr
= (dir_slot
*) retdent
;
435 __u8
*nextclust
= cluster
+ mydata
->clust_size
* SECTOR_SIZE
;
436 __u8 counter
= (slotptr
->id
& ~LAST_LONG_ENTRY_MASK
) & 0xff;
439 while ((__u8
*)slotptr
< nextclust
) {
440 if (counter
== 0) break;
441 if (((slotptr
->id
& ~LAST_LONG_ENTRY_MASK
) & 0xff) != counter
)
447 if ((__u8
*)slotptr
>= nextclust
) {
451 curclust
= get_fatent(mydata
, curclust
);
452 if (curclust
<= 0x0001 || curclust
>= 0xfff0) {
453 FAT_DPRINT("curclust: 0x%x\n", curclust
);
454 FAT_ERROR("Invalid FAT entry\n");
457 if (get_cluster(mydata
, curclust
, get_vfatname_block
,
458 mydata
->clust_size
* SECTOR_SIZE
) != 0) {
459 FAT_DPRINT("Error: reading directory block\n");
462 slotptr2
= (dir_slot
*) get_vfatname_block
;
463 while (slotptr2
->id
> 0x01) {
466 /* Save the real directory entry */
467 realdent
= (dir_entry
*)slotptr2
+ 1;
468 while ((__u8
*)slotptr2
>= get_vfatname_block
) {
469 slot2str(slotptr2
, l_name
, &idx
);
473 /* Save the real directory entry */
474 realdent
= (dir_entry
*)slotptr
;
479 if (slot2str(slotptr
, l_name
, &idx
)) break;
480 } while (!(slotptr
->id
& LAST_LONG_ENTRY_MASK
));
483 if (*l_name
== DELETED_FLAG
) *l_name
= '\0';
484 else if (*l_name
== aRING
) *l_name
= 'å';
487 /* Return the real directory entry */
488 memcpy(retdent
, realdent
, sizeof(dir_entry
));
494 /* Calculate short name checksum */
496 mkcksum(const char *str
)
501 for (i
= 0; i
< 11; i
++) {
502 ret
= (((ret
&1)<<7)|((ret
&0xfe)>>1)) + str
[i
];
511 * Get the directory entry associated with 'filename' from the directory
512 * starting at 'startsect'
514 __u8 get_dentfromdir_block
[MAX_CLUSTSIZE
];
515 static dir_entry
*get_dentfromdir (fsdata
* mydata
, int startsect
,
516 char *filename
, dir_entry
* retdent
,
519 __u16 prevcksum
= 0xffff;
520 __u32 curclust
= START (retdent
);
521 int files
= 0, dirs
= 0;
523 FAT_DPRINT ("get_dentfromdir: %s\n", filename
);
528 if (get_cluster (mydata
, curclust
, get_dentfromdir_block
,
529 mydata
->clust_size
* SECTOR_SIZE
) != 0) {
530 FAT_DPRINT ("Error: reading directory block\n");
533 dentptr
= (dir_entry
*) get_dentfromdir_block
;
534 for (i
= 0; i
< DIRENTSPERCLUST
; i
++) {
535 char s_name
[14], l_name
[256];
538 if (dentptr
->name
[0] == DELETED_FLAG
) {
542 if ((dentptr
->attr
& ATTR_VOLUME
)) {
543 #ifdef CONFIG_SUPPORT_VFAT
544 if ((dentptr
->attr
& ATTR_VFAT
) &&
545 (dentptr
->name
[0] & LAST_LONG_ENTRY_MASK
)) {
546 prevcksum
= ((dir_slot
*) dentptr
)
548 get_vfatname (mydata
, curclust
, get_dentfromdir_block
,
551 int isdir
= (dentptr
->attr
& ATTR_DIR
);
561 if (l_name
[0] != 0) {
568 printf (" %8ld %s%c\n",
569 (long) FAT2CPU32 (dentptr
->size
),
572 printf (" %s%c\n", l_name
, dirc
);
578 FAT_DPRINT ("vfatname: |%s|\n", l_name
);
582 /* Volume label or VFAT entry */
587 if (dentptr
->name
[0] == 0) {
589 printf ("\n%d file(s), %d dir(s)\n\n", files
, dirs
);
591 FAT_DPRINT ("Dentname == NULL - %d\n", i
);
594 #ifdef CONFIG_SUPPORT_VFAT
595 if (dols
&& mkcksum (dentptr
->name
) == prevcksum
) {
600 get_name (dentptr
, s_name
);
602 int isdir
= (dentptr
->attr
& ATTR_DIR
);
612 if (s_name
[0] != 0) {
619 printf (" %8ld %s%c\n",
620 (long) FAT2CPU32 (dentptr
->size
), s_name
,
623 printf (" %s%c\n", s_name
, dirc
);
629 if (strcmp (filename
, s_name
) && strcmp (filename
, l_name
)) {
630 FAT_DPRINT ("Mismatch: |%s|%s|\n", s_name
, l_name
);
634 memcpy (retdent
, dentptr
, sizeof (dir_entry
));
636 FAT_DPRINT ("DentName: %s", s_name
);
637 FAT_DPRINT (", start: 0x%x", START (dentptr
));
638 FAT_DPRINT (", size: 0x%x %s\n",
639 FAT2CPU32 (dentptr
->size
),
640 (dentptr
->attr
& ATTR_DIR
) ? "(DIR)" : "");
644 curclust
= get_fatent (mydata
, curclust
);
645 if (curclust
<= 0x0001 || curclust
>= 0xfff0) {
646 FAT_DPRINT ("curclust: 0x%x\n", curclust
);
647 FAT_ERROR ("Invalid FAT entry\n");
657 * Read boot sector and volume info from a FAT filesystem
660 read_bootsectandvi(boot_sector
*bs
, volume_info
*volinfo
, int *fatsize
)
662 __u8 block
[FS_BLOCK_SIZE
];
663 volume_info
*vistart
;
665 if (disk_read(0, 1, block
) < 0) {
666 FAT_DPRINT("Error: reading block\n");
670 memcpy(bs
, block
, sizeof(boot_sector
));
671 bs
->reserved
= FAT2CPU16(bs
->reserved
);
672 bs
->fat_length
= FAT2CPU16(bs
->fat_length
);
673 bs
->secs_track
= FAT2CPU16(bs
->secs_track
);
674 bs
->heads
= FAT2CPU16(bs
->heads
);
676 bs
->hidden
= FAT2CPU32(bs
->hidden
);
678 bs
->total_sect
= FAT2CPU32(bs
->total_sect
);
681 if (bs
->fat_length
== 0) {
683 bs
->fat32_length
= FAT2CPU32(bs
->fat32_length
);
684 bs
->flags
= FAT2CPU16(bs
->flags
);
685 bs
->root_cluster
= FAT2CPU32(bs
->root_cluster
);
686 bs
->info_sector
= FAT2CPU16(bs
->info_sector
);
687 bs
->backup_boot
= FAT2CPU16(bs
->backup_boot
);
688 vistart
= (volume_info
*) (block
+ sizeof(boot_sector
));
691 vistart
= (volume_info
*) &(bs
->fat32_length
);
694 memcpy(volinfo
, vistart
, sizeof(volume_info
));
696 /* Terminate fs_type string. Writing past the end of vistart
697 is ok - it's just the buffer. */
698 vistart
->fs_type
[8] = '\0';
700 if (*fatsize
== 32) {
701 if (compare_sign(FAT32_SIGN
, vistart
->fs_type
) == 0) {
705 if (compare_sign(FAT12_SIGN
, vistart
->fs_type
) == 0) {
709 if (compare_sign(FAT16_SIGN
, vistart
->fs_type
) == 0) {
715 FAT_DPRINT("Error: broken fs_type sign\n");
720 __u8 do_fat_read_block
[MAX_CLUSTSIZE
]; /* Block buffer */
722 do_fat_read (const char *filename
, void *buffer
, unsigned long maxsize
,
725 #if CONFIG_NIOS /* NIOS CPU cannot access big automatic arrays */
728 char fnamecopy
[2048];
732 fsdata
*mydata
= &datablock
;
734 __u16 prevcksum
= 0xffff;
736 int rootdir_size
, cursect
;
738 int files
= 0, dirs
= 0;
742 if (read_bootsectandvi (&bs
, &volinfo
, &mydata
->fatsize
)) {
743 FAT_DPRINT ("Error: reading boot sector\n");
746 if (mydata
->fatsize
== 32) {
747 mydata
->fatlength
= bs
.fat32_length
;
749 mydata
->fatlength
= bs
.fat_length
;
751 mydata
->fat_sect
= bs
.reserved
;
752 cursect
= mydata
->rootdir_sect
753 = mydata
->fat_sect
+ mydata
->fatlength
* bs
.fats
;
754 mydata
->clust_size
= bs
.cluster_size
;
755 if (mydata
->fatsize
== 32) {
756 rootdir_size
= mydata
->clust_size
;
757 mydata
->data_begin
= mydata
->rootdir_sect
/* + rootdir_size */
758 - (mydata
->clust_size
* 2);
760 rootdir_size
= ((bs
.dir_entries
[1] * (int) 256 + bs
.dir_entries
[0])
761 * sizeof (dir_entry
)) / SECTOR_SIZE
;
762 mydata
->data_begin
= mydata
->rootdir_sect
+ rootdir_size
763 - (mydata
->clust_size
* 2);
765 mydata
->fatbufnum
= -1;
767 FAT_DPRINT ("FAT%d, fatlength: %d\n", mydata
->fatsize
,
769 FAT_DPRINT ("Rootdir begins at sector: %d, offset: %x, size: %d\n"
770 "Data begins at: %d\n",
771 mydata
->rootdir_sect
, mydata
->rootdir_sect
* SECTOR_SIZE
,
772 rootdir_size
, mydata
->data_begin
);
773 FAT_DPRINT ("Cluster size: %d\n", mydata
->clust_size
);
775 /* "cwd" is always the root... */
776 while (ISDIRDELIM (*filename
))
778 /* Make a copy of the filename and convert it to lowercase */
779 strcpy (fnamecopy
, filename
);
780 downcase (fnamecopy
);
781 if (*fnamecopy
== '\0') {
785 } else if ((idx
= dirdelim (fnamecopy
)) >= 0) {
787 fnamecopy
[idx
] = '\0';
788 subname
= fnamecopy
+ idx
+ 1;
789 /* Handle multiple delimiters */
790 while (ISDIRDELIM (*subname
))
799 if (disk_read (cursect
, mydata
->clust_size
, do_fat_read_block
) < 0) {
800 FAT_DPRINT ("Error: reading rootdir block\n");
803 dentptr
= (dir_entry
*) do_fat_read_block
;
804 for (i
= 0; i
< DIRENTSPERBLOCK
; i
++) {
805 char s_name
[14], l_name
[256];
808 if ((dentptr
->attr
& ATTR_VOLUME
)) {
809 #ifdef CONFIG_SUPPORT_VFAT
810 if ((dentptr
->attr
& ATTR_VFAT
) &&
811 (dentptr
->name
[0] & LAST_LONG_ENTRY_MASK
)) {
812 prevcksum
= ((dir_slot
*) dentptr
)->alias_checksum
;
813 get_vfatname (mydata
, 0, do_fat_read_block
, dentptr
, l_name
);
814 if (dols
== LS_ROOT
) {
815 int isdir
= (dentptr
->attr
& ATTR_DIR
);
825 if (l_name
[0] != 0) {
832 printf (" %8ld %s%c\n",
833 (long) FAT2CPU32 (dentptr
->size
),
836 printf (" %s%c\n", l_name
, dirc
);
842 FAT_DPRINT ("Rootvfatname: |%s|\n", l_name
);
846 /* Volume label or VFAT entry */
850 } else if (dentptr
->name
[0] == 0) {
851 FAT_DPRINT ("RootDentname == NULL - %d\n", i
);
852 if (dols
== LS_ROOT
) {
853 printf ("\n%d file(s), %d dir(s)\n\n", files
, dirs
);
858 #ifdef CONFIG_SUPPORT_VFAT
859 else if (dols
== LS_ROOT
860 && mkcksum (dentptr
->name
) == prevcksum
) {
865 get_name (dentptr
, s_name
);
866 if (dols
== LS_ROOT
) {
867 int isdir
= (dentptr
->attr
& ATTR_DIR
);
873 if (s_name
[0] != 0) {
879 if (s_name
[0] != 0) {
886 printf (" %8ld %s%c\n",
887 (long) FAT2CPU32 (dentptr
->size
), s_name
,
890 printf (" %s%c\n", s_name
, dirc
);
896 if (strcmp (fnamecopy
, s_name
) && strcmp (fnamecopy
, l_name
)) {
897 FAT_DPRINT ("RootMismatch: |%s|%s|\n", s_name
, l_name
);
901 if (isdir
&& !(dentptr
->attr
& ATTR_DIR
))
904 FAT_DPRINT ("RootName: %s", s_name
);
905 FAT_DPRINT (", start: 0x%x", START (dentptr
));
906 FAT_DPRINT (", size: 0x%x %s\n",
907 FAT2CPU32 (dentptr
->size
), isdir
? "(DIR)" : "");
909 goto rootdir_done
; /* We got a match */
917 int startsect
= mydata
->data_begin
918 + START (dentptr
) * mydata
->clust_size
;
920 char *nextname
= NULL
;
925 idx
= dirdelim (subname
);
928 nextname
= subname
+ idx
+ 1;
929 /* Handle multiple delimiters */
930 while (ISDIRDELIM (*nextname
))
932 if (dols
&& *nextname
== '\0')
935 if (dols
&& firsttime
) {
942 if (get_dentfromdir (mydata
, startsect
, subname
, dentptr
,
943 isdir
? 0 : dols
) == NULL
) {
950 if (!(dentptr
->attr
& ATTR_DIR
))
955 ret
= get_contents (mydata
, dentptr
, buffer
, maxsize
);
956 FAT_DPRINT ("Size: %d, got: %ld\n", FAT2CPU32 (dentptr
->size
), ret
);
963 file_fat_detectfs(void)
971 printf("No current device\n");
974 #if (CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI) || \
975 (CONFIG_COMMANDS & CFG_CMD_USB) || (CONFIG_MMC)
976 printf("Interface: ");
977 switch(cur_dev
->if_type
) {
978 case IF_TYPE_IDE
: printf("IDE"); break;
979 case IF_TYPE_SCSI
: printf("SCSI"); break;
980 case IF_TYPE_ATAPI
: printf("ATAPI"); break;
981 case IF_TYPE_USB
: printf("USB"); break;
982 case IF_TYPE_DOC
: printf("DOC"); break;
983 case IF_TYPE_MMC
: printf("MMC"); break;
984 default : printf("Unknown");
986 printf("\n Device %d: ",cur_dev
->dev
);
989 if(read_bootsectandvi(&bs
, &volinfo
, &fatsize
)) {
990 printf("\nNo valid FAT fs found\n");
993 memcpy (vol_label
, volinfo
.volume_label
, 11);
994 vol_label
[11] = '\0';
995 volinfo
.fs_type
[5]='\0';
996 printf("Partition %d: Filesystem: %s \"%s\"\n",cur_part
,volinfo
.fs_type
,vol_label
);
1002 file_fat_ls(const char *dir
)
1004 return do_fat_read(dir
, NULL
, 0, LS_YES
);
1009 file_fat_read(const char *filename
, void *buffer
, unsigned long maxsize
)
1011 printf("reading %s\n",filename
);
1012 return do_fat_read(filename
, buffer
, maxsize
, LS_NO
);
1015 #endif /* #if (CONFIG_COMMANDS & CFG_CMD_FAT) */