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-rw-r--r--fs/fat/Makefile46
-rw-r--r--fs/fat/fat.c901
-rw-r--r--fs/fat/file.c208
3 files changed, 1155 insertions, 0 deletions
diff --git a/fs/fat/Makefile b/fs/fat/Makefile
new file mode 100644
index 0000000..e462757
--- /dev/null
+++ b/fs/fat/Makefile
@@ -0,0 +1,46 @@
+#
+#
+# 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
+#
+
+TOPDIR=../../
+
+include $(TOPDIR)/config.mk
+
+LIB = libfat.a
+
+AOBJS =
+COBJS = fat.o file.o
+
+OBJS = $(AOBJS) $(COBJS)
+
+all: $(LIB) $(AOBJS)
+
+$(LIB): .depend $(OBJS)
+ $(AR) crv $@ $(OBJS)
+
+
+#########################################################################
+
+.depend: Makefile $(AOBJS:.o=.S) $(COBJS:.o=.c)
+ $(CC) -M $(CFLAGS) $(AOBJS:.o=.S) $(COBJS:.o=.c) > $@
+
+sinclude .depend
+
+#########################################################################
diff --git a/fs/fat/fat.c b/fs/fat/fat.c
new file mode 100644
index 0000000..9f01567
--- /dev/null
+++ b/fs/fat/fat.c
@@ -0,0 +1,901 @@
+/*
+ * 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>
+
+#if (CONFIG_COMMANDS & CFG_CMD_FAT)
+
+/*
+ * Convert a string to lowercase.
+ */
+static void
+downcase(char *str)
+{
+ while (*str != '\0') {
+ TOLOWER(*str);
+ str++;
+ }
+}
+
+int (*dev_block_read)(int device, __u32 blknr, __u32 blkcnt, __u8 *buffer) = 0;
+
+int disk_read (__u32 startblock, __u32 getsize, __u8 * bufptr)
+{
+ /* FIXME we need to determine the start block of the
+ * partition where the DOS FS resides
+ */
+ startblock += 32;
+
+ if (dev_block_read) {
+ return dev_block_read (0, startblock, getsize, bufptr);
+ }
+ return -1;
+}
+
+
+int
+fat_register_read (int (*block_read)(int, __u32, __u32, __u8 *))
+{
+ dev_block_read = block_read;
+ 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 = 'å';
+ 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);
+ while (size > 0) {
+ if (size >= FS_BLOCK_SIZE) {
+ if (disk_read(startsect + idx, 1, buffer) < 0) {
+ FAT_DPRINT("Error reading data\n");
+ return -1;
+ }
+ } else {
+ __u8 tmpbuf[FS_BLOCK_SIZE];
+ if (disk_read(startsect + idx, 1, tmpbuf) < 0) {
+ FAT_DPRINT("Error reading data\n");
+ return -1;
+ }
+ memcpy(buffer, tmpbuf, size);
+
+ return 0;
+ }
+ buffer += FS_BLOCK_SIZE;
+ size -= FS_BLOCK_SIZE;
+ idx++;
+ }
+
+ 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);
+
+ FAT_DPRINT("Filesize: %ld bytes\n", filesize);
+
+ if (maxsize > 0 && filesize > maxsize) filesize = maxsize;
+
+ FAT_DPRINT("Reading: %ld bytes\n", filesize);
+
+ do {
+ int getsize = (filesize > bytesperclust) ? bytesperclust :
+ filesize;
+
+ if (get_cluster(mydata, curclust, buffer, getsize) != 0) {
+ FAT_ERROR("Error reading cluster\n");
+ return -1;
+ }
+ gotsize += getsize;
+ filesize -= getsize;
+ if (filesize <= 0) return gotsize;
+ buffer += getsize;
+
+ curclust = get_fatent(mydata, curclust);
+ if (curclust <= 0x0001 || curclust >= 0xfff0) {
+ FAT_DPRINT("curclust: 0x%x\n", curclust);
+ FAT_ERROR("Invalid FAT entry\n");
+ return gotsize;
+ }
+ } 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.
+ */
+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 & 0xf;
+ int idx = 0;
+
+ while ((__u8*)slotptr < nextclust) {
+ if (counter == 0) break;
+ if ((slotptr->id & 0x0f) != counter) return -1;
+ slotptr++;
+ counter--;
+ }
+
+ if ((__u8*)slotptr >= nextclust) {
+ __u8 block[MAX_CLUSTSIZE];
+ 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, block,
+ mydata->clust_size * SECTOR_SIZE) != 0) {
+ FAT_DPRINT("Error: reading directory block\n");
+ return -1;
+ }
+ slotptr2 = (dir_slot*) block;
+ while (slotptr2->id > 0x01) {
+ slotptr2++;
+ }
+ /* Save the real directory entry */
+ realdent = (dir_entry*)slotptr2 + 1;
+ while ((__u8*)slotptr2 >= 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 & 0x40));
+
+ l_name[idx] = '\0';
+ if (*l_name == DELETED_FLAG) *l_name = '\0';
+ else if (*l_name == aRING) *l_name = 'å';
+ 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'
+ */
+static dir_entry *get_dentfromdir (fsdata * mydata, int startsect,
+ char *filename, dir_entry * retdent,
+ int dols)
+{
+ __u16 prevcksum = 0xffff;
+ __u8 block[MAX_CLUSTSIZE];
+ __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, block,
+ mydata->clust_size * SECTOR_SIZE) != 0) {
+ FAT_DPRINT ("Error: reading directory block\n");
+ return NULL;
+ }
+ dentptr = (dir_entry *) block;
+ for (i = 0; i < DIRENTSPERCLUST; 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] & 0x40)) {
+ prevcksum = ((dir_slot *) dentptr)
+ ->alias_checksum;
+ get_vfatname (mydata, curclust, 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;
+}
+
+
+static long
+do_fat_read (const char *filename, void *buffer, unsigned long maxsize,
+ int dols)
+{
+ __u8 block[FS_BLOCK_SIZE]; /* Block buffer */
+ 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, 1, block) < 0) {
+ FAT_DPRINT ("Error: reading rootdir block\n");
+ return -1;
+ }
+ dentptr = (dir_entry *) 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] & 0x40)) {
+ prevcksum = ((dir_slot *) dentptr)->alias_checksum;
+ get_vfatname (mydata, 0, 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) {
+ 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 (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;
+
+ return read_bootsectandvi(&bs, &volinfo, &fatsize);
+}
+
+
+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)
+{
+ return do_fat_read(filename, buffer, maxsize, LS_NO);
+}
+
+#endif /* #if (CONFIG_COMMANDS & CFG_CMD_FAT) */
diff --git a/fs/fat/file.c b/fs/fat/file.c
new file mode 100644
index 0000000..d375ba2
--- /dev/null
+++ b/fs/fat/file.c
@@ -0,0 +1,208 @@
+/*
+ * file.c
+ *
+ * Mini "VFS" 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 <malloc.h>
+#include <fat.h>
+#include <linux/stat.h>
+#include <linux/time.h>
+
+#if (CONFIG_COMMANDS & CFG_CMD_FAT)
+
+/* Supported filesystems */
+static const struct filesystem filesystems[] = {
+ { file_fat_detectfs, file_fat_ls, file_fat_read, "FAT" },
+};
+#define NUM_FILESYS (sizeof(filesystems)/sizeof(struct filesystem))
+
+/* The filesystem which was last detected */
+static int current_filesystem = FSTYPE_NONE;
+
+/* The current working directory */
+#define CWD_LEN 511
+char file_cwd[CWD_LEN+1] = "/";
+
+const char *
+file_getfsname(int idx)
+{
+ if (idx < 0 || idx >= NUM_FILESYS) return NULL;
+
+ return filesystems[idx].name;
+}
+
+
+static void
+pathcpy(char *dest, const char *src)
+{
+ char *origdest = dest;
+
+ do {
+ if (dest-file_cwd >= CWD_LEN) {
+ *dest = '\0';
+ return;
+ }
+ *(dest) = *(src);
+ if (*src == '\0') {
+ if (dest-- != origdest && ISDIRDELIM(*dest)) {
+ *dest = '\0';
+ }
+ return;
+ }
+ ++dest;
+ if (ISDIRDELIM(*src)) {
+ while (ISDIRDELIM(*src)) src++;
+ } else {
+ src++;
+ }
+ } while (1);
+}
+
+
+int
+file_cd(const char *path)
+{
+ if (ISDIRDELIM(*path)) {
+ while (ISDIRDELIM(*path)) path++;
+ strncpy(file_cwd+1, path, CWD_LEN-1);
+ } else {
+ const char *origpath = path;
+ char *tmpstr = file_cwd;
+ int back = 0;
+
+ while (*tmpstr != '\0') tmpstr++;
+ do {
+ tmpstr--;
+ } while (ISDIRDELIM(*tmpstr));
+
+ while (*path == '.') {
+ path++;
+ while (*path == '.') {
+ path++;
+ back++;
+ }
+ if (*path != '\0' && !ISDIRDELIM(*path)) {
+ path = origpath;
+ back = 0;
+ break;
+ }
+ while (ISDIRDELIM(*path)) path++;
+ origpath = path;
+ }
+
+ while (back--) {
+ /* Strip off path component */
+ while (!ISDIRDELIM(*tmpstr)) {
+ tmpstr--;
+ }
+ if (tmpstr == file_cwd) {
+ /* Incremented again right after the loop. */
+ tmpstr--;
+ break;
+ }
+ /* Skip delimiters */
+ while (ISDIRDELIM(*tmpstr)) tmpstr--;
+ }
+ tmpstr++;
+ if (*path == '\0') {
+ if (tmpstr == file_cwd) {
+ *tmpstr = '/';
+ tmpstr++;
+ }
+ *tmpstr = '\0';
+ return 0;
+ }
+ *tmpstr = '/';
+ pathcpy(tmpstr+1, path);
+ }
+
+ return 0;
+}
+
+
+int
+file_detectfs(void)
+{
+ int i;
+
+ current_filesystem = FSTYPE_NONE;
+
+ for (i = 0; i < NUM_FILESYS; i++) {
+ if (filesystems[i].detect() == 0) {
+ strcpy(file_cwd, "/");
+ current_filesystem = i;
+ break;
+ }
+ }
+
+ return current_filesystem;
+}
+
+
+int
+file_ls(const char *dir)
+{
+ char fullpath[1024];
+ const char *arg;
+
+ if (current_filesystem == FSTYPE_NONE) {
+ printf("Can't list files without a filesystem!\n");
+ return -1;
+ }
+
+ if (ISDIRDELIM(*dir)) {
+ arg = dir;
+ } else {
+ sprintf(fullpath, "%s/%s", file_cwd, dir);
+ arg = fullpath;
+ }
+ return filesystems[current_filesystem].ls(arg);
+}
+
+
+long
+file_read(const char *filename, void *buffer, unsigned long maxsize)
+{
+ char fullpath[1024];
+ const char *arg;
+
+ if (current_filesystem == FSTYPE_NONE) {
+ printf("Can't load file without a filesystem!\n");
+ return -1;
+ }
+
+ if (ISDIRDELIM(*filename)) {
+ arg = filename;
+ } else {
+ sprintf(fullpath, "%s/%s", file_cwd, filename);
+ arg = fullpath;
+ }
+
+ return filesystems[current_filesystem].read(arg, buffer, maxsize);
+}
+
+#endif /* #if (CONFIG_COMMANDS & CFG_CMD_FAT) */
generated by cgit v1.1 at 2024-11-16 00:42:32 +0000