Currently the fat code is messy related to Coding rules.
Signed-off-by: Remy Bohmer <[EMAIL PROTECTED]>
---
fs/fat/fat.c | 1004 ++++++++++++++++++++++++++++-----------------------------
fs/fat/file.c | 65 ++--
include/fat.h | 7 +-
3 files changed, 518 insertions(+), 558 deletions(-)
diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index 06eabc3..0d4942a 100644
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -34,8 +34,7 @@
/*
* Convert a string to lowercase.
*/
-static void
-downcase(char *str)
+static void downcase(char *str)
{
while (*str != '\0') {
TOLOWER(*str);
@@ -43,7 +42,7 @@ downcase(char *str)
}
}
-static block_dev_desc_t *cur_dev = NULL;
+static block_dev_desc_t *cur_dev = NULL;
static unsigned long part_offset = 0;
static int cur_part = 1;
@@ -51,21 +50,18 @@ static int cur_part = 1;
#define DOS_PART_MAGIC_OFFSET 0x1fe
#define DOS_FS_TYPE_OFFSET 0x36
-int disk_read (__u32 startblock, __u32 getsize, __u8 * bufptr)
+static int disk_read(__u32 startblock, __u32 nofblocks, __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);
- }
+ if (cur_dev->block_read)
+ return cur_dev->block_read(cur_dev->dev, startblock, nofblocks,
+ (unsigned long *)bufptr);
return -1;
}
-
-int
-fat_register_device(block_dev_desc_t *dev_desc, int part_no)
+int fat_register_device(block_dev_desc_t *dev_desc, int part_no)
{
unsigned char buffer[SECTOR_SIZE];
disk_partition_t info;
@@ -74,22 +70,22 @@ fat_register_device(block_dev_desc_t *dev_desc, int part_no)
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);
+ 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) {
+ buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa)
/* no signature found */
return -1;
- }
+
#if (defined(CONFIG_CMD_IDE) || \
defined(CONFIG_CMD_SCSI) || \
defined(CONFIG_CMD_USB) || \
defined(CONFIG_MMC) || \
defined(CONFIG_SYSTEMACE) )
/* First we assume, there is a MBR */
- if (!get_partition_info (dev_desc, part_no, &info)) {
+ if (!get_partition_info(dev_desc, part_no, &info)) {
part_offset = info.start;
cur_part = part_no;
} else if (!strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET], "FAT", 3)) {
@@ -97,13 +93,13 @@ fat_register_device(block_dev_desc_t *dev_desc, int part_no)
cur_part = 1;
part_offset = 0;
} else {
- printf ("** Partition %d not valid on device %d **\n",
- part_no, dev_desc->dev);
+ printf("** Partition %d not valid on device %d **\n",
+ part_no, dev_desc->dev);
return -1;
}
#else
- if (!strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET],"FAT",3)) {
+ 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;
@@ -121,37 +117,34 @@ fat_register_device(block_dev_desc_t *dev_desc, int
part_no)
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)
+static int dirdelim(char *str)
{
char *start = str;
while (*str != '\0') {
- if (ISDIRDELIM(*str)) return str - start;
+ 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)
+static int compare_sign(char *str1, char *str2)
{
- char *end = str1+SIGNLEN;
+ char *end = str1 + SIGNLEN;
while (str1 != end) {
- if (*str1 != *str2) {
+ if (*str1 != *str2)
return -1;
- }
+
str1++;
str2++;
}
@@ -159,15 +152,14 @@ compare_sign(char *str1, char *str2)
return 0;
}
-
/*
* Extract zero terminated short name from a directory entry.
*/
-static void get_name (dir_entry *dirent, char *s_name)
+static void get_name(dir_entry *dirent, char *s_name)
{
char *ptr;
- memcpy (s_name, dirent->name, 8);
+ memcpy(s_name, dirent->name, 8);
s_name[8] = '\0';
ptr = s_name;
while (*ptr && *ptr != ' ')
@@ -175,7 +167,7 @@ static void get_name (dir_entry *dirent, char *s_name)
if (dirent->ext[0] && dirent->ext[0] != ' ') {
*ptr = '.';
ptr++;
- memcpy (ptr, dirent->ext, 3);
+ memcpy(ptr, dirent->ext, 3);
ptr[3] = '\0';
while (*ptr && *ptr != ' ')
ptr++;
@@ -185,19 +177,20 @@ static void get_name (dir_entry *dirent, char *s_name)
*s_name = '\0';
else if (*s_name == aRING)
*s_name = DELETED_FLAG;
- downcase (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)
+static __u32 get_fatent(fsdata *mydata, __u32 entry)
{
__u32 bufnum;
__u32 offset;
__u32 ret = 0x00;
+ __u32 off16;
+ __u16 val1, val2;
switch (mydata->fatsize) {
case 32:
@@ -220,7 +213,7 @@ get_fatent(fsdata *mydata, __u32 entry)
/* Read a new block of FAT entries into the cache. */
if (bufnum != mydata->fatbufnum) {
- int getsize = FATBUFSIZE/FS_BLOCK_SIZE;
+ int nofblocks = FATBUFSIZE / FS_BLOCK_SIZE;
__u8 *bufptr = mydata->fatbuf;
__u32 fatlength = mydata->fatlength;
__u32 startblock = bufnum * FATBUFBLOCKS;
@@ -228,8 +221,9 @@ get_fatent(fsdata *mydata, __u32 entry)
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) {
+ if (nofblocks > (fatlength / FS_BLOCK_SIZE))
+ nofblocks = fatlength / FS_BLOCK_SIZE;
+ if (disk_read(startblock, nofblocks, bufptr) < 0) {
FAT_DPRINT("Error reading FAT blocks\n");
return ret;
}
@@ -239,96 +233,89 @@ get_fatent(fsdata *mydata, __u32 entry)
/* Get the actual entry from the table */
switch (mydata->fatsize) {
case 32:
- ret = FAT2CPU32(((__u32*)mydata->fatbuf)[offset]);
+ ret = FAT2CPU32(((__u32 *) mydata->fatbuf)[offset]);
break;
case 16:
- ret = FAT2CPU16(((__u16*)mydata->fatbuf)[offset]);
+ ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[offset]);
break;
- case 12: {
- __u32 off16 = (offset*3)/4;
- __u16 val1, val2;
+ case 12:
+ off16 = (offset * 3) / 4;
switch (offset & 0x3) {
case 0:
- ret = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]);
+ ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[off16]);
ret &= 0xfff;
break;
case 1:
- val1 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]);
+ val1 = FAT2CPU16(((__u16 *) mydata->fatbuf)[off16]);
val1 &= 0xf000;
- val2 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16+1]);
+ val2 = FAT2CPU16(((__u16 *) mydata->fatbuf)[off16 + 1]);
val2 &= 0x00ff;
ret = (val2 << 4) | (val1 >> 12);
break;
case 2:
- val1 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]);
+ val1 = FAT2CPU16(((__u16 *) mydata->fatbuf)[off16]);
val1 &= 0xff00;
- val2 = FAT2CPU16(((__u16*)mydata->fatbuf)[off16+1]);
+ val2 = FAT2CPU16(((__u16 *) mydata->fatbuf)[off16 + 1]);
val2 &= 0x000f;
ret = (val2 << 8) | (val1 >> 8);
break;
case 3:
- ret = FAT2CPU16(((__u16*)mydata->fatbuf)[off16]);;
+ ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[off16]);
ret = (ret & 0xfff0) >> 4;
break;
default:
break;
}
- }
- 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)
+static int get_cluster(fsdata *mydata, __u32 clustnum,
+ __u8 *buffer, unsigned long size_bytes)
{
int idx = 0;
__u32 startsect;
- if (clustnum > 0) {
- startsect = mydata->data_begin + clustnum*mydata->clust_size;
- } else {
+ 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) {
+ if (disk_read(startsect, size_bytes / FS_BLOCK_SIZE, buffer) < 0) {
FAT_DPRINT("Error reading data\n");
return -1;
}
- if(size % FS_BLOCK_SIZE) {
+ if (size_bytes % FS_BLOCK_SIZE) {
__u8 tmpbuf[FS_BLOCK_SIZE];
- idx= size/FS_BLOCK_SIZE;
+ idx = size_bytes / FS_BLOCK_SIZE;
if (disk_read(startsect + idx, 1, tmpbuf) < 0) {
FAT_DPRINT("Error reading data\n");
return -1;
}
- buffer += idx*FS_BLOCK_SIZE;
+ buffer += idx * FS_BLOCK_SIZE;
- memcpy(buffer, tmpbuf, size % FS_BLOCK_SIZE);
+ memcpy(buffer, tmpbuf, size_bytes % 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)
+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;
@@ -338,25 +325,44 @@ get_contents(fsdata *mydata, dir_entry *dentptr, __u8
*buffer,
FAT_DPRINT("Filesize: %ld bytes\n", filesize);
- if (maxsize > 0 && filesize > maxsize) filesize = maxsize;
+ if (maxsize > 0 && filesize > maxsize)
+ filesize = maxsize;
FAT_DPRINT("Reading: %ld bytes\n", filesize);
- actsize=bytesperclust;
- endclust=curclust;
- do {
+ actsize = bytesperclust;
+ endclust = curclust;
+ for (;;) {
/* search for consecutive clusters */
- while(actsize < filesize) {
+ while (actsize < filesize) {
newclust = get_fatent(mydata, endclust);
- if((newclust -1)!=endclust)
- goto getit;
+ if ((newclust - 1) != endclust) {
+ 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 (CHECK_CLUST(curclust, mydata->fatsize)) {
+ FAT_DPRINT("curclust: 0x%x\n",
+ curclust);
+ FAT_ERROR("Invalid FAT entry\n");
+ return gotsize;
+ }
+ actsize = bytesperclust;
+ endclust = curclust;
+ continue;
+ }
if (CHECK_CLUST(newclust, mydata->fatsize)) {
FAT_DPRINT("curclust: 0x%x\n", newclust);
FAT_DPRINT("Invalid FAT entry\n");
return gotsize;
}
- endclust=newclust;
- actsize+= bytesperclust;
+ endclust = newclust;
+ actsize += bytesperclust;
}
/* actsize >= file size */
actsize -= bytesperclust;
@@ -369,90 +375,75 @@ get_contents(fsdata *mydata, dir_entry *dentptr, __u8
*buffer,
gotsize += (int)actsize;
filesize -= actsize;
buffer += actsize;
- actsize= filesize;
+ actsize = filesize;
if (get_cluster(mydata, endclust, buffer, (int)actsize) != 0) {
FAT_ERROR("Error reading cluster\n");
return -1;
}
- gotsize+=actsize;
+ 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 (CHECK_CLUST(curclust, mydata->fatsize)) {
- 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)
+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;
+ 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;
+ 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;
+ 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)
+static __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;
+ 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;
+ 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) {
+ if ((__u8 *) slotptr >= nextclust) {
dir_slot *slotptr2;
slotptr--;
@@ -467,29 +458,32 @@ get_vfatname(fsdata *mydata, int curclust, __u8 *cluster,
FAT_DPRINT("Error: reading directory block\n");
return -1;
}
- slotptr2 = (dir_slot*) get_vfatname_block;
+ 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) {
+ 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;
+ realdent = (dir_entry *) slotptr;
}
do {
slotptr--;
- if (slot2str(slotptr, l_name, &idx)) break;
+ 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 = DELETED_FLAG;
+ if (*l_name == DELETED_FLAG)
+ *l_name = '\0';
+ else if (*l_name == aRING)
+ *l_name = DELETED_FLAG;
downcase(l_name);
/* Return the real directory entry */
@@ -498,174 +492,181 @@ get_vfatname(fsdata *mydata, int curclust, __u8
*cluster,
return 0;
}
-
/* Calculate short name checksum */
-static __u8
-mkcksum(const char *str)
+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];
- }
+ 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)
+/* Returns 0 on illegal vfat entry, 1 on valid vfat entry */
+static int valid_vfat(fsdata *mydata, dir_entry *dentptr, __u16 *prevcksum,
+ int curclust, char *l_name, int dols, int *dirs,
+ int *files, __u8 *read_block)
{
- __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) {
+ if ((dentptr->attr & ATTR_VFAT) &&
+ (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
+ *prevcksum = ((dir_slot *) dentptr)->alias_checksum;
+ if (get_vfatname(mydata, curclust, read_block, dentptr, l_name))
+ return 0;
+
+ if (dols != LS_NO) {
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++;
+ (*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);
- }
+ 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("Rootvfatname: |%s|\n", l_name);
+ return 1;
+ }
+#endif
+ /* Probably just a Volume label */
+ return 0;
+}
+
+/*
+ * Get the directory entry associated with 'filename' from the directory
+ * starting at 'startsect'
+ */
+static __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);
+ for (;;) {
+ 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;
}
- FAT_DPRINT ("Dentname == NULL - %d\n", i);
- 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) &&
+ !valid_vfat(mydata, dentptr, &prevcksum, curclust,
+ l_name, dols, &dirs, &files,
+ get_dentfromdir_block)) {
+ /* Ignore volume labels */
+ dentptr++;
+ continue;
+ }
+
+ if (dentptr->name[0] == 0) {
+ if (dols != LS_NO)
+ 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;
- }
+ if ((dols != LS_NO) &&
+ (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;
- }
+ get_name(dentptr, s_name);
+ if (dols != LS_NO) {
+ 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;
}
- if (doit) {
- if (dirc == ' ') {
- printf (" %8ld %s%c\n",
- (long) FAT2CPU32 (dentptr->size), s_name,
- dirc);
- } else {
- printf (" %s%c\n", s_name, dirc);
- }
+ curclust = get_fatent(mydata, curclust);
+ if (CHECK_CLUST(curclust, mydata->fatsize)) {
+ FAT_DPRINT("curclust: 0x%x\n", curclust);
+ FAT_ERROR("Invalid FAT entry\n");
+ return NULL;
}
- 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 (CHECK_CLUST(curclust, mydata->fatsize)) {
- FAT_DPRINT ("curclust: 0x%x\n", curclust);
- FAT_ERROR ("Invalid FAT entry\n");
- return NULL;
}
- }
-
- 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)
+static int read_bootsectandvi(boot_sector *bs, volume_info *volinfo,
+ int *fatsize)
{
__u8 block[FS_BLOCK_SIZE];
volume_info *vistart;
@@ -676,27 +677,27 @@ read_bootsectandvi(boot_sector *bs, volume_info *volinfo,
int *fatsize)
}
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);
+ 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);
+ 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->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));
+ 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);
+ vistart = (volume_info *)&(bs->fat32_length);
*fatsize = 0;
}
memcpy(volinfo, vistart, sizeof(volume_info));
@@ -706,9 +707,8 @@ read_bootsectandvi(boot_sector *bs, volume_info *volinfo,
int *fatsize)
vistart->fs_type[8] = '\0';
if (*fatsize == 32) {
- if (compare_sign(FAT32_SIGN, vistart->fs_type) == 0) {
+ if (compare_sign(FAT32_SIGN, vistart->fs_type) == 0)
return 0;
- }
} else {
if (compare_sign(FAT12_SIGN, vistart->fs_type) == 0) {
*fatsize = 12;
@@ -724,258 +724,228 @@ read_bootsectandvi(boot_sector *bs, volume_info
*volinfo, int *fatsize)
return -1;
}
+static __u8 do_fat_read_block[MAX_CLUSTSIZE]; /* Block buffer */
-__u8 do_fat_read_block[MAX_CLUSTSIZE]; /* Block buffer */
-long
-do_fat_read (const char *filename, void *buffer, unsigned long maxsize,
- int dols)
+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
+#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;
+ 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;
}
- 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 (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 == LS_NO)
+ 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 != LS_NO)
+ isdir = 1;
+
+ for (;;) {
+ int i;
+
+ if (disk_read(cursect, 1, 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->name[0] == DELETED_FLAG) {
+ /* Ignore deleted entries */
+ dentptr++;
+ continue;
}
- if (doit) {
- if (dirc == ' ') {
- printf (" %8ld %s%c\n",
- (long) FAT2CPU32 (dentptr->size),
- l_name, dirc);
- } else {
- printf (" %s%c\n", l_name, dirc);
- }
+ if ((dentptr->attr & ATTR_VOLUME) &&
+ !valid_vfat(mydata, dentptr, &prevcksum, 0, l_name,
+ dols, &dirs, &files,
+ do_fat_read_block)) {
+ /* Ignore volume labels */
+ dentptr++;
+ continue;
+ }
+ 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;
}
- 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;
- }
+ 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;
+ 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)" : "");
+ 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;
- }
- }
+ 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 != LS_NO && *nextname == '\0')
+ firsttime = 0;
+ } else {
+ if (dols != LS_NO && 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 (get_dentfromdir(mydata, startsect, subname, dentptr,
+ isdir ? 0 : dols) == NULL) {
+ if (dols != LS_NO && !isdir)
+ return 0;
+ return -1;
+ }
- if (idx >= 0) {
- if (!(dentptr->attr & ATTR_DIR))
- return -1;
- subname = nextname;
+ 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);
+ ret = get_contents(mydata, dentptr, buffer, maxsize);
+ FAT_DPRINT("Size: %d, got: %ld\n", FAT2CPU32(dentptr->size), ret);
- return ret;
+ return ret;
}
-
-int
-file_fat_detectfs(void)
+int file_fat_detectfs(void)
{
- boot_sector bs;
- volume_info volinfo;
- int fatsize;
- char vol_label[12];
+ boot_sector bs;
+ volume_info volinfo;
+ int fatsize;
+ char vol_label[12];
- if(cur_dev==NULL) {
+ if (cur_dev == NULL) {
printf("No current device\n");
return 1;
}
@@ -984,41 +954,37 @@ file_fat_detectfs(void)
defined(CONFIG_CMD_USB) || \
defined(CONFIG_MMC)
printf("Interface: ");
- switch(cur_dev->if_type) {
+ 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");
+ default : printf("Unknown"); break;
}
- printf("\n Device %d: ",cur_dev->dev);
+ printf("\n Device %d: ", cur_dev->dev);
dev_print(cur_dev);
#endif
- if(read_bootsectandvi(&bs, &volinfo, &fatsize)) {
+ if (read_bootsectandvi(&bs, &volinfo, &fatsize)) {
printf("\nNo valid FAT fs found\n");
return 1;
}
- memcpy (vol_label, volinfo.volume_label, 11);
+ 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);
+ 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)
+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)
+long file_fat_read(const char *filename, void *buffer, unsigned long maxsize)
{
- printf("reading %s\n",filename);
+ printf("reading %s\n", filename);
return do_fat_read(filename, buffer, maxsize, LS_NO);
}
diff --git a/fs/fat/file.c b/fs/fat/file.c
index e870734..e300ff7 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -34,8 +34,9 @@
/* Supported filesystems */
static const struct filesystem filesystems[] = {
- { file_fat_detectfs, file_fat_ls, file_fat_read, "FAT" },
+ {file_fat_detectfs, file_fat_ls, file_fat_read, "FAT"},
};
+
#define NUM_FILESYS (sizeof(filesystems)/sizeof(struct filesystem))
/* The filesystem which was last detected */
@@ -43,56 +44,54 @@ static int current_filesystem = FSTYPE_NONE;
/* The current working directory */
#define CWD_LEN 511
-char file_cwd[CWD_LEN+1] = "/";
+char file_cwd[CWD_LEN + 1] = "/";
-const char *
-file_getfsname(int idx)
+const char *file_getfsname(int idx)
{
- if (idx < 0 || idx >= NUM_FILESYS) return NULL;
+ if (idx < 0 || idx >= NUM_FILESYS)
+ return NULL;
return filesystems[idx].name;
}
-
-static void
-pathcpy(char *dest, const char *src)
+static void pathcpy(char *dest, const char *src)
{
char *origdest = dest;
- do {
- if (dest-file_cwd >= CWD_LEN) {
+ for (;;) {
+ if (dest - file_cwd >= CWD_LEN) {
*dest = '\0';
return;
}
*(dest) = *(src);
if (*src == '\0') {
- if (dest-- != origdest && ISDIRDELIM(*dest)) {
+ if (dest-- != origdest && ISDIRDELIM(*dest))
*dest = '\0';
- }
+
return;
}
++dest;
- if (ISDIRDELIM(*src)) {
- while (ISDIRDELIM(*src)) src++;
- } else {
+ if (ISDIRDELIM(*src))
+ while (ISDIRDELIM(*src))
+ src++;
+ else
src++;
- }
- } while (1);
+ }
}
-
-int
-file_cd(const char *path)
+int file_cd(const char *path)
{
if (ISDIRDELIM(*path)) {
- while (ISDIRDELIM(*path)) path++;
- strncpy(file_cwd+1, path, CWD_LEN-1);
+ 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++;
+ while (*tmpstr != '\0')
+ tmpstr++;
do {
tmpstr--;
} while (ISDIRDELIM(*tmpstr));
@@ -108,7 +107,8 @@ file_cd(const char *path)
back = 0;
break;
}
- while (ISDIRDELIM(*path)) path++;
+ while (ISDIRDELIM(*path))
+ path++;
origpath = path;
}
@@ -123,7 +123,8 @@ file_cd(const char *path)
break;
}
/* Skip delimiters */
- while (ISDIRDELIM(*tmpstr)) tmpstr--;
+ while (ISDIRDELIM(*tmpstr))
+ tmpstr--;
}
tmpstr++;
if (*path == '\0') {
@@ -135,15 +136,13 @@ file_cd(const char *path)
return 0;
}
*tmpstr = '/';
- pathcpy(tmpstr+1, path);
+ pathcpy(tmpstr + 1, path);
}
return 0;
}
-
-int
-file_detectfs(void)
+int file_detectfs(void)
{
int i;
@@ -160,9 +159,7 @@ file_detectfs(void)
return current_filesystem;
}
-
-int
-file_ls(const char *dir)
+int file_ls(const char *dir)
{
char fullpath[1024];
const char *arg;
@@ -181,9 +178,7 @@ file_ls(const char *dir)
return filesystems[current_filesystem].ls(arg);
}
-
-long
-file_read(const char *filename, void *buffer, unsigned long maxsize)
+long file_read(const char *filename, void *buffer, unsigned long maxsize)
{
char fullpath[1024];
const char *arg;
diff --git a/include/fat.h b/include/fat.h
index c8b9493..be7023a 100644
--- a/include/fat.h
+++ b/include/fat.h
@@ -49,7 +49,6 @@
#define FAT16BUFSIZE (FATBUFSIZE/2)
#define FAT32BUFSIZE (FATBUFSIZE/4)
-
/* Filesystem identifiers */
#define FAT12_SIGN "FAT12 "
#define FAT16_SIGN "FAT16 "
@@ -140,8 +139,7 @@ typedef struct boot_sector {
__u16 reserved2[6]; /* Unused */
} boot_sector;
-typedef struct volume_info
-{
+typedef struct volume_info {
__u8 drive_number; /* BIOS drive number */
__u8 reserved; /* Unused */
__u8 ext_boot_sign; /* 0x29 if fields below exist (DOS 3.3+) */
@@ -188,7 +186,8 @@ typedef struct {
__u16 fat_sect; /* Starting sector of the FAT */
__u16 rootdir_sect; /* Start sector of root directory */
__u16 clust_size; /* Size of clusters in sectors */
- short data_begin; /* The sector of the first cluster, can be
negative */
+ short data_begin; /* The sector of the first cluster,
+ * can be negative */
int fatbufnum; /* Used by get_fatent, init to -1 */
} fsdata;
--
1.5.6.3
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