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,
32 #include <asm/byteorder.h>
35 #include <linux/compiler.h>
38 * Convert a string to lowercase.
40 static void downcase(char *str)
42 while (*str != '\0') {
48 static block_dev_desc_t *cur_dev;
49 static unsigned int cur_part_nr;
50 static disk_partition_t cur_part_info;
52 #define DOS_BOOT_MAGIC_OFFSET 0x1fe
53 #define DOS_FS_TYPE_OFFSET 0x36
54 #define DOS_FS32_TYPE_OFFSET 0x52
56 static int disk_read(__u32 block, __u32 nr_blocks, void *buf)
58 if (!cur_dev || !cur_dev->block_read)
61 return cur_dev->block_read(cur_dev->dev,
62 cur_part_info.start + block, nr_blocks, buf);
65 int fat_register_device(block_dev_desc_t * dev_desc, int part_no)
67 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
69 /* First close any currently found FAT filesystem */
72 #if (defined(CONFIG_CMD_IDE) || \
73 defined(CONFIG_CMD_SATA) || \
74 defined(CONFIG_CMD_SCSI) || \
75 defined(CONFIG_CMD_USB) || \
76 defined(CONFIG_MMC) || \
77 defined(CONFIG_SYSTEMACE) )
79 /* Read the partition table, if present */
80 if (!get_partition_info(dev_desc, part_no, &cur_part_info)) {
82 cur_part_nr = part_no;
86 /* Otherwise it might be a superfloppy (whole-disk FAT filesystem) */
89 printf("** Partition %d not valid on device %d **\n",
90 part_no, dev_desc->dev);
96 cur_part_info.start = 0;
97 cur_part_info.size = dev_desc->lba;
98 cur_part_info.blksz = dev_desc->blksz;
99 memset(cur_part_info.name, 0, sizeof(cur_part_info.name));
100 memset(cur_part_info.type, 0, sizeof(cur_part_info.type));
103 /* Make sure it has a valid FAT header */
104 if (disk_read(0, 1, buffer) != 1) {
109 /* Check if it's actually a DOS volume */
110 if (memcmp(buffer + DOS_BOOT_MAGIC_OFFSET, "\x55\xAA", 2)) {
115 /* Check for FAT12/FAT16/FAT32 filesystem */
116 if (!memcmp(buffer + DOS_FS_TYPE_OFFSET, "FAT", 3))
118 if (!memcmp(buffer + DOS_FS32_TYPE_OFFSET, "FAT32", 5))
127 * Get the first occurence of a directory delimiter ('/' or '\') in a string.
128 * Return index into string if found, -1 otherwise.
130 static int dirdelim(char *str)
134 while (*str != '\0') {
135 if (ISDIRDELIM(*str))
143 * Extract zero terminated short name from a directory entry.
145 static void get_name(dir_entry *dirent, char *s_name)
149 memcpy(s_name, dirent->name, 8);
152 while (*ptr && *ptr != ' ')
154 if (dirent->ext[0] && dirent->ext[0] != ' ') {
157 memcpy(ptr, dirent->ext, 3);
159 while (*ptr && *ptr != ' ')
163 if (*s_name == DELETED_FLAG)
165 else if (*s_name == aRING)
166 *s_name = DELETED_FLAG;
171 * Get the entry at index 'entry' in a FAT (12/16/32) table.
172 * On failure 0x00 is returned.
174 static __u32 get_fatent(fsdata *mydata, __u32 entry)
181 switch (mydata->fatsize) {
183 bufnum = entry / FAT32BUFSIZE;
184 offset = entry - bufnum * FAT32BUFSIZE;
187 bufnum = entry / FAT16BUFSIZE;
188 offset = entry - bufnum * FAT16BUFSIZE;
191 bufnum = entry / FAT12BUFSIZE;
192 offset = entry - bufnum * FAT12BUFSIZE;
196 /* Unsupported FAT size */
200 debug("FAT%d: entry: 0x%04x = %d, offset: 0x%04x = %d\n",
201 mydata->fatsize, entry, entry, offset, offset);
203 /* Read a new block of FAT entries into the cache. */
204 if (bufnum != mydata->fatbufnum) {
205 __u32 getsize = FATBUFBLOCKS;
206 __u8 *bufptr = mydata->fatbuf;
207 __u32 fatlength = mydata->fatlength;
208 __u32 startblock = bufnum * FATBUFBLOCKS;
210 if (startblock + getsize > fatlength)
211 getsize = fatlength - startblock;
213 startblock += mydata->fat_sect; /* Offset from start of disk */
215 if (disk_read(startblock, getsize, bufptr) < 0) {
216 debug("Error reading FAT blocks\n");
219 mydata->fatbufnum = bufnum;
222 /* Get the actual entry from the table */
223 switch (mydata->fatsize) {
225 ret = FAT2CPU32(((__u32 *) mydata->fatbuf)[offset]);
228 ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[offset]);
231 off16 = (offset * 3) / 4;
233 switch (offset & 0x3) {
235 ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[off16]);
239 val1 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]);
241 val2 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16 + 1]);
243 ret = (val2 << 4) | (val1 >> 12);
246 val1 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]);
248 val2 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16 + 1]);
250 ret = (val2 << 8) | (val1 >> 8);
253 ret = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]);
254 ret = (ret & 0xfff0) >> 4;
261 debug("FAT%d: ret: %08x, offset: %04x\n",
262 mydata->fatsize, ret, offset);
268 * Read at most 'size' bytes from the specified cluster into 'buffer'.
269 * Return 0 on success, -1 otherwise.
272 get_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer, unsigned long size)
279 startsect = mydata->data_begin +
280 clustnum * mydata->clust_size;
282 startsect = mydata->rootdir_sect;
285 debug("gc - clustnum: %d, startsect: %d\n", clustnum, startsect);
287 if ((unsigned long)buffer & (ARCH_DMA_MINALIGN - 1)) {
288 ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size);
290 printf("FAT: Misaligned buffer address (%p)\n", buffer);
292 while (size >= mydata->sect_size) {
293 ret = disk_read(startsect++, 1, tmpbuf);
295 debug("Error reading data (got %d)\n", ret);
299 memcpy(buffer, tmpbuf, mydata->sect_size);
300 buffer += mydata->sect_size;
301 size -= mydata->sect_size;
304 idx = size / mydata->sect_size;
305 ret = disk_read(startsect, idx, buffer);
307 debug("Error reading data (got %d)\n", ret);
311 idx *= mydata->sect_size;
316 ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size);
318 ret = disk_read(startsect, 1, tmpbuf);
320 debug("Error reading data (got %d)\n", ret);
324 memcpy(buffer, tmpbuf, size);
331 * Read at most 'maxsize' bytes from the file associated with 'dentptr'
333 * Return the number of bytes read or -1 on fatal errors.
336 get_contents(fsdata *mydata, dir_entry *dentptr, __u8 *buffer,
337 unsigned long maxsize)
339 unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0;
340 unsigned int bytesperclust = mydata->clust_size * mydata->sect_size;
341 __u32 curclust = START(dentptr);
342 __u32 endclust, newclust;
343 unsigned long actsize;
345 debug("Filesize: %ld bytes\n", filesize);
347 if (maxsize > 0 && filesize > maxsize)
350 debug("%ld bytes\n", filesize);
352 actsize = bytesperclust;
356 /* search for consecutive clusters */
357 while (actsize < filesize) {
358 newclust = get_fatent(mydata, endclust);
359 if ((newclust - 1) != endclust)
361 if (CHECK_CLUST(newclust, mydata->fatsize)) {
362 debug("curclust: 0x%x\n", newclust);
363 debug("Invalid FAT entry\n");
367 actsize += bytesperclust;
370 /* actsize >= file size */
371 actsize -= bytesperclust;
373 /* get remaining clusters */
374 if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
375 printf("Error reading cluster\n");
379 /* get remaining bytes */
380 gotsize += (int)actsize;
384 if (get_cluster(mydata, endclust, buffer, (int)actsize) != 0) {
385 printf("Error reading cluster\n");
391 if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
392 printf("Error reading cluster\n");
395 gotsize += (int)actsize;
399 curclust = get_fatent(mydata, endclust);
400 if (CHECK_CLUST(curclust, mydata->fatsize)) {
401 debug("curclust: 0x%x\n", curclust);
402 printf("Invalid FAT entry\n");
405 actsize = bytesperclust;
410 #ifdef CONFIG_SUPPORT_VFAT
412 * Extract the file name information from 'slotptr' into 'l_name',
413 * starting at l_name[*idx].
414 * Return 1 if terminator (zero byte) is found, 0 otherwise.
416 static int slot2str(dir_slot *slotptr, char *l_name, int *idx)
420 for (j = 0; j <= 8; j += 2) {
421 l_name[*idx] = slotptr->name0_4[j];
422 if (l_name[*idx] == 0x00)
426 for (j = 0; j <= 10; j += 2) {
427 l_name[*idx] = slotptr->name5_10[j];
428 if (l_name[*idx] == 0x00)
432 for (j = 0; j <= 2; j += 2) {
433 l_name[*idx] = slotptr->name11_12[j];
434 if (l_name[*idx] == 0x00)
443 * Extract the full long filename starting at 'retdent' (which is really
444 * a slot) into 'l_name'. If successful also copy the real directory entry
446 * Return 0 on success, -1 otherwise.
448 __u8 get_vfatname_block[MAX_CLUSTSIZE]
449 __aligned(ARCH_DMA_MINALIGN);
452 get_vfatname(fsdata *mydata, int curclust, __u8 *cluster,
453 dir_entry *retdent, char *l_name)
456 dir_slot *slotptr = (dir_slot *)retdent;
457 __u8 *buflimit = cluster + mydata->sect_size * ((curclust == 0) ?
460 __u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff;
463 if (counter > VFAT_MAXSEQ) {
464 debug("Error: VFAT name is too long\n");
468 while ((__u8 *)slotptr < buflimit) {
471 if (((slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff) != counter)
477 if ((__u8 *)slotptr >= buflimit) {
482 curclust = get_fatent(mydata, curclust);
483 if (CHECK_CLUST(curclust, mydata->fatsize)) {
484 debug("curclust: 0x%x\n", curclust);
485 printf("Invalid FAT entry\n");
489 if (get_cluster(mydata, curclust, get_vfatname_block,
490 mydata->clust_size * mydata->sect_size) != 0) {
491 debug("Error: reading directory block\n");
495 slotptr2 = (dir_slot *)get_vfatname_block;
496 while (counter > 0) {
497 if (((slotptr2->id & ~LAST_LONG_ENTRY_MASK)
504 /* Save the real directory entry */
505 realdent = (dir_entry *)slotptr2;
506 while ((__u8 *)slotptr2 > get_vfatname_block) {
508 slot2str(slotptr2, l_name, &idx);
511 /* Save the real directory entry */
512 realdent = (dir_entry *)slotptr;
517 if (slot2str(slotptr, l_name, &idx))
519 } while (!(slotptr->id & LAST_LONG_ENTRY_MASK));
522 if (*l_name == DELETED_FLAG)
524 else if (*l_name == aRING)
525 *l_name = DELETED_FLAG;
528 /* Return the real directory entry */
529 memcpy(retdent, realdent, sizeof(dir_entry));
534 /* Calculate short name checksum */
535 static __u8 mkcksum(const char *str)
541 for (i = 0; i < 11; i++) {
542 ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + str[i];
547 #endif /* CONFIG_SUPPORT_VFAT */
550 * Get the directory entry associated with 'filename' from the directory
551 * starting at 'startsect'
553 __u8 get_dentfromdir_block[MAX_CLUSTSIZE]
554 __aligned(ARCH_DMA_MINALIGN);
556 static dir_entry *get_dentfromdir(fsdata *mydata, int startsect,
557 char *filename, dir_entry *retdent,
560 __u16 prevcksum = 0xffff;
561 __u32 curclust = START(retdent);
562 int files = 0, dirs = 0;
564 debug("get_dentfromdir: %s\n", filename);
571 if (get_cluster(mydata, curclust, get_dentfromdir_block,
572 mydata->clust_size * mydata->sect_size) != 0) {
573 debug("Error: reading directory block\n");
577 dentptr = (dir_entry *)get_dentfromdir_block;
579 for (i = 0; i < DIRENTSPERCLUST; i++) {
580 char s_name[14], l_name[VFAT_MAXLEN_BYTES];
583 if (dentptr->name[0] == DELETED_FLAG) {
587 if ((dentptr->attr & ATTR_VOLUME)) {
588 #ifdef CONFIG_SUPPORT_VFAT
589 if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
590 (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
591 prevcksum = ((dir_slot *)dentptr)->alias_checksum;
592 get_vfatname(mydata, curclust,
593 get_dentfromdir_block,
600 isdir = (dentptr->attr & ATTR_DIR);
608 if (l_name[0] != 0) {
615 printf(" %8ld %s%c\n",
616 (long)FAT2CPU32(dentptr->size),
628 debug("vfatname: |%s|\n", l_name);
632 /* Volume label or VFAT entry */
637 if (dentptr->name[0] == 0) {
639 printf("\n%d file(s), %d dir(s)\n\n",
642 debug("Dentname == NULL - %d\n", i);
645 #ifdef CONFIG_SUPPORT_VFAT
646 if (dols && mkcksum(dentptr->name) == prevcksum) {
652 get_name(dentptr, s_name);
654 int isdir = (dentptr->attr & ATTR_DIR);
664 if (s_name[0] != 0) {
672 printf(" %8ld %s%c\n",
673 (long)FAT2CPU32(dentptr->size),
685 if (strcmp(filename, s_name)
686 && strcmp(filename, l_name)) {
687 debug("Mismatch: |%s|%s|\n", s_name, l_name);
692 memcpy(retdent, dentptr, sizeof(dir_entry));
694 debug("DentName: %s", s_name);
695 debug(", start: 0x%x", START(dentptr));
696 debug(", size: 0x%x %s\n",
697 FAT2CPU32(dentptr->size),
698 (dentptr->attr & ATTR_DIR) ? "(DIR)" : "");
703 curclust = get_fatent(mydata, curclust);
704 if (CHECK_CLUST(curclust, mydata->fatsize)) {
705 debug("curclust: 0x%x\n", curclust);
706 printf("Invalid FAT entry\n");
715 * Read boot sector and volume info from a FAT filesystem
718 read_bootsectandvi(boot_sector *bs, volume_info *volinfo, int *fatsize)
721 volume_info *vistart;
724 if (cur_dev == NULL) {
725 debug("Error: no device selected\n");
729 block = memalign(ARCH_DMA_MINALIGN, cur_dev->blksz);
731 debug("Error: allocating block\n");
735 if (disk_read(0, 1, block) < 0) {
736 debug("Error: reading block\n");
740 memcpy(bs, block, sizeof(boot_sector));
741 bs->reserved = FAT2CPU16(bs->reserved);
742 bs->fat_length = FAT2CPU16(bs->fat_length);
743 bs->secs_track = FAT2CPU16(bs->secs_track);
744 bs->heads = FAT2CPU16(bs->heads);
745 bs->total_sect = FAT2CPU32(bs->total_sect);
748 if (bs->fat_length == 0) {
750 bs->fat32_length = FAT2CPU32(bs->fat32_length);
751 bs->flags = FAT2CPU16(bs->flags);
752 bs->root_cluster = FAT2CPU32(bs->root_cluster);
753 bs->info_sector = FAT2CPU16(bs->info_sector);
754 bs->backup_boot = FAT2CPU16(bs->backup_boot);
755 vistart = (volume_info *)(block + sizeof(boot_sector));
758 vistart = (volume_info *)&(bs->fat32_length);
761 memcpy(volinfo, vistart, sizeof(volume_info));
763 if (*fatsize == 32) {
764 if (strncmp(FAT32_SIGN, vistart->fs_type, SIGNLEN) == 0)
767 if (strncmp(FAT12_SIGN, vistart->fs_type, SIGNLEN) == 0) {
771 if (strncmp(FAT16_SIGN, vistart->fs_type, SIGNLEN) == 0) {
777 debug("Error: broken fs_type sign\n");
785 __u8 do_fat_read_block[MAX_CLUSTSIZE]
786 __aligned(ARCH_DMA_MINALIGN);
789 do_fat_read(const char *filename, void *buffer, unsigned long maxsize, int dols)
791 char fnamecopy[2048];
795 fsdata *mydata = &datablock;
796 dir_entry *dentptr = NULL;
797 __u16 prevcksum = 0xffff;
801 int files = 0, dirs = 0;
804 __u32 root_cluster = 0;
805 int rootdir_size = 0;
808 if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) {
809 debug("Error: reading boot sector\n");
813 if (mydata->fatsize == 32) {
814 root_cluster = bs.root_cluster;
815 mydata->fatlength = bs.fat32_length;
817 mydata->fatlength = bs.fat_length;
820 mydata->fat_sect = bs.reserved;
822 cursect = mydata->rootdir_sect
823 = mydata->fat_sect + mydata->fatlength * bs.fats;
825 mydata->sect_size = (bs.sector_size[1] << 8) + bs.sector_size[0];
826 mydata->clust_size = bs.cluster_size;
827 if (mydata->sect_size != cur_part_info.blksz) {
828 printf("Error: FAT sector size mismatch (fs=%hu, dev=%lu)\n",
829 mydata->sect_size, cur_part_info.blksz);
833 if (mydata->fatsize == 32) {
834 mydata->data_begin = mydata->rootdir_sect -
835 (mydata->clust_size * 2);
837 rootdir_size = ((bs.dir_entries[1] * (int)256 +
841 mydata->data_begin = mydata->rootdir_sect +
843 (mydata->clust_size * 2);
846 mydata->fatbufnum = -1;
847 mydata->fatbuf = memalign(ARCH_DMA_MINALIGN, FATBUFSIZE);
848 if (mydata->fatbuf == NULL) {
849 debug("Error: allocating memory\n");
853 #ifdef CONFIG_SUPPORT_VFAT
854 debug("VFAT Support enabled\n");
856 debug("FAT%d, fat_sect: %d, fatlength: %d\n",
857 mydata->fatsize, mydata->fat_sect, mydata->fatlength);
858 debug("Rootdir begins at cluster: %d, sector: %d, offset: %x\n"
859 "Data begins at: %d\n",
861 mydata->rootdir_sect,
862 mydata->rootdir_sect * mydata->sect_size, mydata->data_begin);
863 debug("Sector size: %d, cluster size: %d\n", mydata->sect_size,
866 /* "cwd" is always the root... */
867 while (ISDIRDELIM(*filename))
870 /* Make a copy of the filename and convert it to lowercase */
871 strcpy(fnamecopy, filename);
874 if (*fnamecopy == '\0') {
879 } else if ((idx = dirdelim(fnamecopy)) >= 0) {
881 fnamecopy[idx] = '\0';
882 subname = fnamecopy + idx + 1;
884 /* Handle multiple delimiters */
885 while (ISDIRDELIM(*subname))
896 debug("FAT read sect=%d, clust_size=%d, DIRENTSPERBLOCK=%zd\n",
897 cursect, mydata->clust_size, DIRENTSPERBLOCK);
899 if (disk_read(cursect,
900 (mydata->fatsize == 32) ?
901 (mydata->clust_size) :
903 do_fat_read_block) < 0) {
904 debug("Error: reading rootdir block\n");
908 dentptr = (dir_entry *) do_fat_read_block;
911 for (i = 0; i < DIRENTSPERBLOCK; i++) {
912 char s_name[14], l_name[VFAT_MAXLEN_BYTES];
915 if (dentptr->name[0] == DELETED_FLAG) {
919 if ((dentptr->attr & ATTR_VOLUME)) {
920 #ifdef CONFIG_SUPPORT_VFAT
921 if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
922 (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
924 ((dir_slot *)dentptr)->alias_checksum;
931 if (dols == LS_ROOT) {
935 (dentptr->attr & ATTR_DIR);
943 if (l_name[0] != 0) {
950 printf(" %8ld %s%c\n",
951 (long)FAT2CPU32(dentptr->size),
963 debug("Rootvfatname: |%s|\n",
968 /* Volume label or VFAT entry */
972 } else if (dentptr->name[0] == 0) {
973 debug("RootDentname == NULL - %d\n", i);
974 if (dols == LS_ROOT) {
975 printf("\n%d file(s), %d dir(s)\n\n",
981 #ifdef CONFIG_SUPPORT_VFAT
982 else if (dols == LS_ROOT &&
983 mkcksum(dentptr->name) == prevcksum) {
989 get_name(dentptr, s_name);
991 if (dols == LS_ROOT) {
992 int isdir = (dentptr->attr & ATTR_DIR);
998 if (s_name[0] != 0) {
1004 if (s_name[0] != 0) {
1011 printf(" %8ld %s%c\n",
1012 (long)FAT2CPU32(dentptr->size),
1023 if (strcmp(fnamecopy, s_name)
1024 && strcmp(fnamecopy, l_name)) {
1025 debug("RootMismatch: |%s|%s|\n", s_name,
1031 if (isdir && !(dentptr->attr & ATTR_DIR))
1034 debug("RootName: %s", s_name);
1035 debug(", start: 0x%x", START(dentptr));
1036 debug(", size: 0x%x %s\n",
1037 FAT2CPU32(dentptr->size),
1038 isdir ? "(DIR)" : "");
1040 goto rootdir_done; /* We got a match */
1042 debug("END LOOP: j=%d clust_size=%d\n", j,
1043 mydata->clust_size);
1046 * On FAT32 we must fetch the FAT entries for the next
1047 * root directory clusters when a cluster has been
1048 * completely processed.
1051 int rootdir_end = 0;
1052 if (mydata->fatsize == 32) {
1053 if (j == mydata->clust_size) {
1057 nxt_clust = get_fatent(mydata, root_cluster);
1058 rootdir_end = CHECK_CLUST(nxt_clust, 32);
1060 nxtsect = mydata->data_begin +
1061 (nxt_clust * mydata->clust_size);
1063 root_cluster = nxt_clust;
1069 if (j == PREFETCH_BLOCKS)
1072 rootdir_end = (++cursect - mydata->rootdir_sect >=
1076 /* If end of rootdir reached */
1078 if (dols == LS_ROOT) {
1079 printf("\n%d file(s), %d dir(s)\n\n",
1091 int startsect = mydata->data_begin
1092 + START(dentptr) * mydata->clust_size;
1094 char *nextname = NULL;
1099 idx = dirdelim(subname);
1102 subname[idx] = '\0';
1103 nextname = subname + idx + 1;
1104 /* Handle multiple delimiters */
1105 while (ISDIRDELIM(*nextname))
1107 if (dols && *nextname == '\0')
1110 if (dols && firsttime) {
1117 if (get_dentfromdir(mydata, startsect, subname, dentptr,
1118 isdir ? 0 : dols) == NULL) {
1125 if (!(dentptr->attr & ATTR_DIR))
1131 ret = get_contents(mydata, dentptr, buffer, maxsize);
1132 debug("Size: %d, got: %ld\n", FAT2CPU32(dentptr->size), ret);
1135 free(mydata->fatbuf);
1139 int file_fat_detectfs(void)
1142 volume_info volinfo;
1146 if (cur_dev == NULL) {
1147 printf("No current device\n");
1151 #if defined(CONFIG_CMD_IDE) || \
1152 defined(CONFIG_CMD_SATA) || \
1153 defined(CONFIG_CMD_SCSI) || \
1154 defined(CONFIG_CMD_USB) || \
1156 printf("Interface: ");
1157 switch (cur_dev->if_type) {
1183 printf("\n Device %d: ", cur_dev->dev);
1187 if (read_bootsectandvi(&bs, &volinfo, &fatsize)) {
1188 printf("\nNo valid FAT fs found\n");
1192 memcpy(vol_label, volinfo.volume_label, 11);
1193 vol_label[11] = '\0';
1194 volinfo.fs_type[5] = '\0';
1196 printf("Partition %d: Filesystem: %s \"%s\"\n", cur_part_nr,
1197 volinfo.fs_type, vol_label);
1202 int file_fat_ls(const char *dir)
1204 return do_fat_read(dir, NULL, 0, LS_YES);
1207 long file_fat_read(const char *filename, void *buffer, unsigned long maxsize)
1209 printf("reading %s\n", filename);
1210 return do_fat_read(filename, buffer, maxsize, LS_NO);