/* * fat.c * * R/O (V)FAT 12/16/32 filesystem implementation by Marcus Sundberg * * 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6 * 2003-03-10 - kharris@nexus-tech.net - ported to uboot * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include <common.h> #include <config.h> #include <fat.h> #include <asm/byteorder.h> #include <part.h> #if (CONFIG_COMMANDS & CFG_CMD_FAT) /* * Convert a string to lowercase. */ static void downcase(char *str) { while (*str != '\0') { TOLOWER(*str); str++; } } static block_dev_desc_t *cur_dev = NULL; static unsigned long part_offset = 0; static int cur_part = 1; #define DOS_PART_TBL_OFFSET 0x1be #define DOS_PART_MAGIC_OFFSET 0x1fe #define DOS_FS_TYPE_OFFSET 0x36 int disk_read (__u32 startblock, __u32 getsize, __u8 * bufptr) { startblock += part_offset; if (cur_dev == NULL) return -1; if (cur_dev->block_read) { return cur_dev->block_read (cur_dev->dev, startblock, getsize, (unsigned long *)bufptr); } return -1; } int fat_register_device(block_dev_desc_t *dev_desc, int part_no) { unsigned char buffer[SECTOR_SIZE]; if (!dev_desc->block_read) return -1; cur_dev=dev_desc; /* check if we have a MBR (on floppies we have only a PBR) */ if (dev_desc->block_read (dev_desc->dev, 0, 1, (ulong *) buffer) != 1) { printf ("** Can't read from device %d **\n", dev_desc->dev); return -1; } if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { /* no signature found */ return -1; } if(!strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET],"FAT",3)) { /* ok, we assume we are on a PBR only */ cur_part = 1; part_offset=0; } else { #if (CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI) || \ (CONFIG_COMMANDS & CFG_CMD_USB) || defined(CONFIG_SYSTEMACE) disk_partition_t info; if(!get_partition_info(dev_desc, part_no, &info)) { part_offset = info.start; cur_part = part_no; } else { printf ("** Partition %d not valid on device %d **\n",part_no,dev_desc->dev); return -1; } #else /* FIXME we need to determine the start block of the * partition where the DOS FS resides. This can be done * by using the get_partition_info routine. For this * purpose the libpart must be included. */ part_offset=32; cur_part = 1; #endif } return 0; } /* * Get the first occurence of a directory delimiter ('/' or '\') in a string. * Return index into string if found, -1 otherwise. */ static int dirdelim(char *str) { char *start = str; while (*str != '\0') { if (ISDIRDELIM(*str)) return str - start; str++; } return -1; } /* * Match volume_info fs_type strings. * Return 0 on match, -1 otherwise. */ static int compare_sign(char *str1, char *str2) { char *end = str1+SIGNLEN; while (str1 != end) { if (*str1 != *str2) { return -1; } str1++; str2++; } return 0; } /* * Extract zero terminated short name from a directory entry. */ static void get_name (dir_entry *dirent, char *s_name) { char *ptr; memcpy (s_name, dirent->name, 8); s_name[8] = '\0'; ptr = s_name; while (*ptr && *ptr != ' ') ptr++; if (dirent->ext[0] && dirent->ext[0] != ' ') { *ptr = '.'; ptr++; memcpy (ptr, dirent->ext, 3); ptr[3] = '\0'; while (*ptr && *ptr != ' ') ptr++; } *ptr = '\0'; if (*s_name == DELETED_FLAG) *s_name = '\0'; else if (*s_name == aRING) *s_name = '�'; downcase (s_name); } /* * Get the entry at index 'entry' in a FAT (12/16/32) table. * On failure 0x00 is returned. */ static __u32 get_fatent(fsdata *mydata, __u32 entry) { __u32 bufnum; __u32 offset; __u32 ret = 0x00; switch (mydata->fatsize) { case 32: bufnum = entry / FAT32BUFSIZE; offset = entry - bufnum * FAT32BUFSIZE; break; case 16: bufnum = entry / FAT16BUFSIZE; offset = entry - bufnum * FAT16BUFSIZE; break; case 12: bufnum = entry / FAT12BUFSIZE; offset = entry - bufnum * FAT12BUFSIZE; break; default: /* Unsupported FAT size */ return ret; } /* Read a new block of FAT entries into the cache. */ if (bufnum != mydata->fatbufnum) { int getsize = FATBUFSIZE/FS_BLOCK_SIZE; __u8 *bufptr = mydata->fatbuf; __u32 fatlength = mydata->fatlength; __u32 startblock = bufnum * FATBUFBLOCKS; fatlength *= SECTOR_SIZE; /* We want it in bytes now */ startblock += mydata->fat_sect; /* Offset from start of disk */ if (getsize > fatlength) getsize = fatlength; if (disk_read(startblock, getsize, bufptr) < 0) { FAT_DPRINT("Error reading FAT blocks\n"); return ret; } mydata->fatbufnum = bufnum; } /* Get the actual entry from the table */ switch (mydata->fatsize) { case 32: ret = FAT2CPU32(((__u32*)mydata->fatbuf)[offset]); break; case 16: ret = FAT2CPU16(((__u16*)mydata->fatbuf)[offset]); break; case 12: { __u32 off16 = (offset*3)/4; __u16 val1, val2; switch (offset & 0x3) { case 0: ret = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]); ret &= 0xfff; break; case 1: val1 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]); val1 &= 0xf000; val2 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16+1]); val2 &= 0x00ff; ret = (val2 << 4) | (val1 >> 12); break; case 2: val1 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]); val1 &= 0xff00; val2 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16+1]); val2 &= 0x000f; ret = (val2 << 8) | (val1 >> 8); break; case 3: ret = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]);; ret = (ret & 0xfff0) >> 4; break; default: break; } } break; } FAT_DPRINT("ret: %d, offset: %d\n", ret, offset); return ret; } /* * Read at most 'size' bytes from the specified cluster into 'buffer'. * Return 0 on success, -1 otherwise. */ static int get_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer, unsigned long size) { int idx = 0; __u32 startsect; if (clustnum > 0) { startsect = mydata->data_begin + clustnum*mydata->clust_size; } else { startsect = mydata->rootdir_sect; } FAT_DPRINT("gc - clustnum: %d, startsect: %d\n", clustnum, startsect); if (disk_read(startsect, size/FS_BLOCK_SIZE , buffer) < 0) { FAT_DPRINT("Error reading data\n"); return -1; } if(size % FS_BLOCK_SIZE) { __u8 tmpbuf[FS_BLOCK_SIZE]; idx= size/FS_BLOCK_SIZE; if (disk_read(startsect + idx, 1, tmpbuf) < 0) { FAT_DPRINT("Error reading data\n"); return -1; } buffer += idx*FS_BLOCK_SIZE; memcpy(buffer, tmpbuf, size % FS_BLOCK_SIZE); return 0; } return 0; } /* * Read at most 'maxsize' bytes from the file associated with 'dentptr' * into 'buffer'. * Return the number of bytes read or -1 on fatal errors. */ static long get_contents(fsdata *mydata, dir_entry *dentptr, __u8 *buffer, unsigned long maxsize) { unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0; unsigned int bytesperclust = mydata->clust_size * SECTOR_SIZE; __u32 curclust = START(dentptr); __u32 endclust, newclust; unsigned long actsize; FAT_DPRINT("Filesize: %ld bytes\n", filesize); if (maxsize > 0 && filesize > maxsize) filesize = maxsize; FAT_DPRINT("Reading: %ld bytes\n", filesize); actsize=bytesperclust; endclust=curclust; do { /* search for consecutive clusters */ while(actsize < filesize) { newclust = get_fatent(mydata, endclust); if((newclust -1)!=endclust) goto getit; if (newclust <= 0x0001 || newclust >= 0xfff0) { FAT_DPRINT("curclust: 0x%x\n", newclust); FAT_DPRINT("Invalid FAT entry\n"); return gotsize; } endclust=newclust; actsize+= bytesperclust; } /* actsize >= file size */ actsize -= bytesperclust; /* get remaining clusters */ if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) { FAT_ERROR("Error reading cluster\n"); return -1; } /* get remaining bytes */ gotsize += (int)actsize; filesize -= actsize; buffer += actsize; actsize= filesize; if (get_cluster(mydata, endclust, buffer, (int)actsize) != 0) { FAT_ERROR("Error reading cluster\n"); return -1; } gotsize+=actsize; return gotsize; getit: if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) { FAT_ERROR("Error reading cluster\n"); return -1; } gotsize += (int)actsize; filesize -= actsize; buffer += actsize; curclust = get_fatent(mydata, endclust); if (curclust <= 0x0001 || curclust >= 0xfff0) { FAT_DPRINT("curclust: 0x%x\n", curclust); FAT_ERROR("Invalid FAT entry\n"); return gotsize; } actsize=bytesperclust; endclust=curclust; } while (1); } #ifdef CONFIG_SUPPORT_VFAT /* * Extract the file name information from 'slotptr' into 'l_name', * starting at l_name[*idx]. * Return 1 if terminator (zero byte) is found, 0 otherwise. */ static int slot2str(dir_slot *slotptr, char *l_name, int *idx) { int j; for (j = 0; j <= 8; j += 2) { l_name[*idx] = slotptr->name0_4[j]; if (l_name[*idx] == 0x00) return 1; (*idx)++; } for (j = 0; j <= 10; j += 2) { l_name[*idx] = slotptr->name5_10[j]; if (l_name[*idx] == 0x00) return 1; (*idx)++; } for (j = 0; j <= 2; j += 2) { l_name[*idx] = slotptr->name11_12[j]; if (l_name[*idx] == 0x00) return 1; (*idx)++; } return 0; } /* * Extract the full long filename starting at 'retdent' (which is really * a slot) into 'l_name'. If successful also copy the real directory entry * into 'retdent' * Return 0 on success, -1 otherwise. */ __u8 get_vfatname_block[MAX_CLUSTSIZE]; static int get_vfatname(fsdata *mydata, int curclust, __u8 *cluster, dir_entry *retdent, char *l_name) { dir_entry *realdent; dir_slot *slotptr = (dir_slot*) retdent; __u8 *nextclust = cluster + mydata->clust_size * SECTOR_SIZE; __u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff; int idx = 0; while ((__u8*)slotptr < nextclust) { if (counter == 0) break; if (((slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff) != counter) return -1; slotptr++; counter--; } if ((__u8*)slotptr >= nextclust) { dir_slot *slotptr2; slotptr--; curclust = get_fatent(mydata, curclust); if (curclust <= 0x0001 || curclust >= 0xfff0) { FAT_DPRINT("curclust: 0x%x\n", curclust); FAT_ERROR("Invalid FAT entry\n"); return -1; } if (get_cluster(mydata, curclust, get_vfatname_block, mydata->clust_size * SECTOR_SIZE) != 0) { FAT_DPRINT("Error: reading directory block\n"); return -1; } slotptr2 = (dir_slot*) get_vfatname_block; while (slotptr2->id > 0x01) { slotptr2++; } /* Save the real directory entry */ realdent = (dir_entry*)slotptr2 + 1; while ((__u8*)slotptr2 >= get_vfatname_block) { slot2str(slotptr2, l_name, &idx); slotptr2--; } } else { /* Save the real directory entry */ realdent = (dir_entry*)slotptr; } do { slotptr--; if (slot2str(slotptr, l_name, &idx)) break; } while (!(slotptr->id & LAST_LONG_ENTRY_MASK)); l_name[idx] = '\0'; if (*l_name == DELETED_FLAG) *l_name = '\0'; else if (*l_name == aRING) *l_name = '�'; downcase(l_name); /* Return the real directory entry */ memcpy(retdent, realdent, sizeof(dir_entry)); return 0; } /* Calculate short name checksum */ static __u8 mkcksum(const char *str) { int i; __u8 ret = 0; for (i = 0; i < 11; i++) { ret = (((ret&1)<<7)|((ret&0xfe)>>1)) + str[i]; } return ret; } #endif /* * Get the directory entry associated with 'filename' from the directory * starting at 'startsect' */ __u8 get_dentfromdir_block[MAX_CLUSTSIZE]; static dir_entry *get_dentfromdir (fsdata * mydata, int startsect, char *filename, dir_entry * retdent, int dols) { __u16 prevcksum = 0xffff; __u32 curclust = START (retdent); int files = 0, dirs = 0; FAT_DPRINT ("get_dentfromdir: %s\n", filename); while (1) { dir_entry *dentptr; int i; if (get_cluster (mydata, curclust, get_dentfromdir_block, mydata->clust_size * SECTOR_SIZE) != 0) { FAT_DPRINT ("Error: reading directory block\n"); return NULL; } dentptr = (dir_entry *) get_dentfromdir_block; for (i = 0; i < DIRENTSPERCLUST; i++) { char s_name[14], l_name[256]; l_name[0] = '\0'; if (dentptr->name[0] == DELETED_FLAG) { dentptr++; continue; } if ((dentptr->attr & ATTR_VOLUME)) { #ifdef CONFIG_SUPPORT_VFAT if ((dentptr->attr & ATTR_VFAT) && (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) { prevcksum = ((dir_slot *) dentptr) ->alias_checksum; get_vfatname (mydata, curclust, get_dentfromdir_block, dentptr, l_name); if (dols) { int isdir = (dentptr->attr & ATTR_DIR); char dirc; int doit = 0; if (isdir) { dirs++; dirc = '/'; doit = 1; } else { dirc = ' '; if (l_name[0] != 0) { files++; doit = 1; } } if (doit) { if (dirc == ' ') { printf (" %8ld %s%c\n", (long) FAT2CPU32 (dentptr->size), l_name, dirc); } else { printf (" %s%c\n", l_name, dirc); } } dentptr++; continue; } FAT_DPRINT ("vfatname: |%s|\n", l_name); } else #endif { /* Volume label or VFAT entry */ dentptr++; continue; } } if (dentptr->name[0] == 0) { if (dols) { printf ("\n%d file(s), %d dir(s)\n\n", files, dirs); } FAT_DPRINT ("Dentname == NULL - %d\n", i); return NULL; } #ifdef CONFIG_SUPPORT_VFAT if (dols && mkcksum (dentptr->name) == prevcksum) { dentptr++; continue; } #endif get_name (dentptr, s_name); if (dols) { int isdir = (dentptr->attr & ATTR_DIR); char dirc; int doit = 0; if (isdir) { dirs++; dirc = '/'; doit = 1; } else { dirc = ' '; if (s_name[0] != 0) { files++; doit = 1; } } if (doit) { if (dirc == ' ') { printf (" %8ld %s%c\n", (long) FAT2CPU32 (dentptr->size), s_name, dirc); } else { printf (" %s%c\n", s_name, dirc); } } dentptr++; continue; } if (strcmp (filename, s_name) && strcmp (filename, l_name)) { FAT_DPRINT ("Mismatch: |%s|%s|\n", s_name, l_name); dentptr++; continue; } memcpy (retdent, dentptr, sizeof (dir_entry)); FAT_DPRINT ("DentName: %s", s_name); FAT_DPRINT (", start: 0x%x", START (dentptr)); FAT_DPRINT (", size: 0x%x %s\n", FAT2CPU32 (dentptr->size), (dentptr->attr & ATTR_DIR) ? "(DIR)" : ""); return retdent; } curclust = get_fatent (mydata, curclust); if (curclust <= 0x0001 || curclust >= 0xfff0) { FAT_DPRINT ("curclust: 0x%x\n", curclust); FAT_ERROR ("Invalid FAT entry\n"); return NULL; } } return NULL; } /* * Read boot sector and volume info from a FAT filesystem */ static int read_bootsectandvi(boot_sector *bs, volume_info *volinfo, int *fatsize) { __u8 block[FS_BLOCK_SIZE]; volume_info *vistart; if (disk_read(0, 1, block) < 0) { FAT_DPRINT("Error: reading block\n"); return -1; } memcpy(bs, block, sizeof(boot_sector)); bs->reserved = FAT2CPU16(bs->reserved); bs->fat_length = FAT2CPU16(bs->fat_length); bs->secs_track = FAT2CPU16(bs->secs_track); bs->heads = FAT2CPU16(bs->heads); #if 0 /* UNUSED */ bs->hidden = FAT2CPU32(bs->hidden); #endif bs->total_sect = FAT2CPU32(bs->total_sect); /* FAT32 entries */ if (bs->fat_length == 0) { /* Assume FAT32 */ bs->fat32_length = FAT2CPU32(bs->fat32_length); bs->flags = FAT2CPU16(bs->flags); bs->root_cluster = FAT2CPU32(bs->root_cluster); bs->info_sector = FAT2CPU16(bs->info_sector); bs->backup_boot = FAT2CPU16(bs->backup_boot); vistart = (volume_info*) (block + sizeof(boot_sector)); *fatsize = 32; } else { vistart = (volume_info*) &(bs->fat32_length); *fatsize = 0; } memcpy(volinfo, vistart, sizeof(volume_info)); /* Terminate fs_type string. Writing past the end of vistart is ok - it's just the buffer. */ vistart->fs_type[8] = '\0'; if (*fatsize == 32) { if (compare_sign(FAT32_SIGN, vistart->fs_type) == 0) { return 0; } } else { if (compare_sign(FAT12_SIGN, vistart->fs_type) == 0) { *fatsize = 12; return 0; } if (compare_sign(FAT16_SIGN, vistart->fs_type) == 0) { *fatsize = 16; return 0; } } FAT_DPRINT("Error: broken fs_type sign\n"); return -1; } __u8 do_fat_read_block[MAX_CLUSTSIZE]; /* Block buffer */ long do_fat_read (const char *filename, void *buffer, unsigned long maxsize, int dols) { #if CONFIG_NIOS /* NIOS CPU cannot access big automatic arrays */ static #endif char fnamecopy[2048]; boot_sector bs; volume_info volinfo; fsdata datablock; fsdata *mydata = &datablock; dir_entry *dentptr; __u16 prevcksum = 0xffff; char *subname = ""; int rootdir_size, cursect; int idx, isdir = 0; int files = 0, dirs = 0; long ret = 0; int firsttime; if (read_bootsectandvi (&bs, &volinfo, &mydata->fatsize)) { FAT_DPRINT ("Error: reading boot sector\n"); return -1; } if (mydata->fatsize == 32) { mydata->fatlength = bs.fat32_length; } else { mydata->fatlength = bs.fat_length; } mydata->fat_sect = bs.reserved; cursect = mydata->rootdir_sect = mydata->fat_sect + mydata->fatlength * bs.fats; mydata->clust_size = bs.cluster_size; if (mydata->fatsize == 32) { rootdir_size = mydata->clust_size; mydata->data_begin = mydata->rootdir_sect /* + rootdir_size */ - (mydata->clust_size * 2); } else { rootdir_size = ((bs.dir_entries[1] * (int) 256 + bs.dir_entries[0]) * sizeof (dir_entry)) / SECTOR_SIZE; mydata->data_begin = mydata->rootdir_sect + rootdir_size - (mydata->clust_size * 2); } mydata->fatbufnum = -1; FAT_DPRINT ("FAT%d, fatlength: %d\n", mydata->fatsize, mydata->fatlength); FAT_DPRINT ("Rootdir begins at sector: %d, offset: %x, size: %d\n" "Data begins at: %d\n", mydata->rootdir_sect, mydata->rootdir_sect * SECTOR_SIZE, rootdir_size, mydata->data_begin); FAT_DPRINT ("Cluster size: %d\n", mydata->clust_size); /* "cwd" is always the root... */ while (ISDIRDELIM (*filename)) filename++; /* Make a copy of the filename and convert it to lowercase */ strcpy (fnamecopy, filename); downcase (fnamecopy); if (*fnamecopy == '\0') { if (!dols) return -1; dols = LS_ROOT; } else if ((idx = dirdelim (fnamecopy)) >= 0) { isdir = 1; fnamecopy[idx] = '\0'; subname = fnamecopy + idx + 1; /* Handle multiple delimiters */ while (ISDIRDELIM (*subname)) subname++; } else if (dols) { isdir = 1; } while (1) { int i; if (disk_read (cursect, mydata->clust_size, do_fat_read_block) < 0) { FAT_DPRINT ("Error: reading rootdir block\n"); return -1; } dentptr = (dir_entry *) do_fat_read_block; for (i = 0; i < DIRENTSPERBLOCK; i++) { char s_name[14], l_name[256]; l_name[0] = '\0'; if ((dentptr->attr & ATTR_VOLUME)) { #ifdef CONFIG_SUPPORT_VFAT if ((dentptr->attr & ATTR_VFAT) && (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) { prevcksum = ((dir_slot *) dentptr)->alias_checksum; get_vfatname (mydata, 0, do_fat_read_block, dentptr, l_name); if (dols == LS_ROOT) { int isdir = (dentptr->attr & ATTR_DIR); char dirc; int doit = 0; if (isdir) { dirs++; dirc = '/'; doit = 1; } else { dirc = ' '; if (l_name[0] != 0) { files++; doit = 1; } } if (doit) { if (dirc == ' ') { printf (" %8ld %s%c\n", (long) FAT2CPU32 (dentptr->size), l_name, dirc); } else { printf (" %s%c\n", l_name, dirc); } } dentptr++; continue; } FAT_DPRINT ("Rootvfatname: |%s|\n", l_name); } else #endif { /* Volume label or VFAT entry */ dentptr++; continue; } } else if (dentptr->name[0] == 0) { FAT_DPRINT ("RootDentname == NULL - %d\n", i); if (dols == LS_ROOT) { printf ("\n%d file(s), %d dir(s)\n\n", files, dirs); return 0; } return -1; } #ifdef CONFIG_SUPPORT_VFAT else if (dols == LS_ROOT && mkcksum (dentptr->name) == prevcksum) { dentptr++; continue; } #endif get_name (dentptr, s_name); if (dols == LS_ROOT) { int isdir = (dentptr->attr & ATTR_DIR); char dirc; int doit = 0; if (isdir) { dirc = '/'; if (s_name[0] != 0) { dirs++; doit = 1; } } else { dirc = ' '; if (s_name[0] != 0) { files++; doit = 1; } } if (doit) { if (dirc == ' ') { printf (" %8ld %s%c\n", (long) FAT2CPU32 (dentptr->size), s_name, dirc); } else { printf (" %s%c\n", s_name, dirc); } } dentptr++; continue; } if (strcmp (fnamecopy, s_name) && strcmp (fnamecopy, l_name)) { FAT_DPRINT ("RootMismatch: |%s|%s|\n", s_name, l_name); dentptr++; continue; } if (isdir && !(dentptr->attr & ATTR_DIR)) return -1; FAT_DPRINT ("RootName: %s", s_name); FAT_DPRINT (", start: 0x%x", START (dentptr)); FAT_DPRINT (", size: 0x%x %s\n", FAT2CPU32 (dentptr->size), isdir ? "(DIR)" : ""); goto rootdir_done; /* We got a match */ } cursect++; } rootdir_done: firsttime = 1; while (isdir) { int startsect = mydata->data_begin + START (dentptr) * mydata->clust_size; dir_entry dent; char *nextname = NULL; dent = *dentptr; dentptr = &dent; idx = dirdelim (subname); if (idx >= 0) { subname[idx] = '\0'; nextname = subname + idx + 1; /* Handle multiple delimiters */ while (ISDIRDELIM (*nextname)) nextname++; if (dols && *nextname == '\0') firsttime = 0; } else { if (dols && firsttime) { firsttime = 0; } else { isdir = 0; } } if (get_dentfromdir (mydata, startsect, subname, dentptr, isdir ? 0 : dols) == NULL) { if (dols && !isdir) return 0; return -1; } if (idx >= 0) { if (!(dentptr->attr & ATTR_DIR)) return -1; subname = nextname; } } ret = get_contents (mydata, dentptr, buffer, maxsize); FAT_DPRINT ("Size: %d, got: %ld\n", FAT2CPU32 (dentptr->size), ret); return ret; } int file_fat_detectfs(void) { boot_sector bs; volume_info volinfo; int fatsize; char vol_label[12]; if(cur_dev==NULL) { printf("No current device\n"); return 1; } #if (CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI) || \ (CONFIG_COMMANDS & CFG_CMD_USB) || (CONFIG_MMC) printf("Interface: "); switch(cur_dev->if_type) { case IF_TYPE_IDE : printf("IDE"); break; case IF_TYPE_SCSI : printf("SCSI"); break; case IF_TYPE_ATAPI : printf("ATAPI"); break; case IF_TYPE_USB : printf("USB"); break; case IF_TYPE_DOC : printf("DOC"); break; case IF_TYPE_MMC : printf("MMC"); break; default : printf("Unknown"); } printf("\n Device %d: ",cur_dev->dev); dev_print(cur_dev); #endif if(read_bootsectandvi(&bs, &volinfo, &fatsize)) { printf("\nNo valid FAT fs found\n"); return 1; } memcpy (vol_label, volinfo.volume_label, 11); vol_label[11] = '\0'; volinfo.fs_type[5]='\0'; printf("Partition %d: Filesystem: %s \"%s\"\n",cur_part,volinfo.fs_type,vol_label); return 0; } int file_fat_ls(const char *dir) { return do_fat_read(dir, NULL, 0, LS_YES); } long file_fat_read(const char *filename, void *buffer, unsigned long maxsize) { printf("reading %s\n",filename); return do_fat_read(filename, buffer, maxsize, LS_NO); } #endif /* #if (CONFIG_COMMANDS & CFG_CMD_FAT) */