static int
mtd_refresh(const char *mtd)
{
int fd;
if (quiet < 2)
fprintf(stderr, "Refreshing mtd partition %s ... ", mtd);
fd = mtd_check_open(mtd);
if(fd < 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
exit(1);
}
if (ioctl(fd, MTDREFRESH, NULL)) {
fprintf(stderr, "Failed to refresh the MTD device\n");
close(fd);
exit(1);
}
close(fd);
if (quiet < 2)
fprintf(stderr, "\n");
return 0;
}
static int
mtd_erase(const char *mtd)
{
int fd;
struct erase_info_user mtdEraseInfo;
if (quiet < 2)
fprintf(stderr, "Erasing %s ...\n", mtd);
fd = mtd_check_open(mtd);
if(fd < 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
exit(1);
}
mtdEraseInfo.length = erasesize;
for (mtdEraseInfo.start = 0;
mtdEraseInfo.start < mtdsize;
mtdEraseInfo.start += erasesize) {
if (mtd_block_is_bad(fd, mtdEraseInfo.start)) {
if (!quiet)
fprintf(stderr, "\nSkipping bad block at 0x%x ", mtdEraseInfo.start);
} else {
ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
if(ioctl(fd, MEMERASE, &mtdEraseInfo))
fprintf(stderr, "Failed to erase block on %s at 0x%x\n", mtd, mtdEraseInfo.start);
}
}
close(fd);
return 0;
}
static int mtd_check(const char *mtd)
{
char *next = NULL;
char *str = NULL;
int fd;
if (strchr(mtd, ':')) {
str = strdup(mtd);
mtd = str;
}
do {
next = strchr(mtd, ':');
if (next) {
*next = 0;
next++;
}
fd = mtd_check_open(mtd);
if (fd < 0)
return 0;
if (!buf)
buf = malloc(erasesize);
close(fd);
mtd = next;
} while (next);
if (str)
free(str);
return 1;
}
static struct fis_image_desc *
fis_open(void)
{
struct fis_image_desc *desc;
if (fis_fd >= 0)
fis_close();
fis_fd = mtd_check_open("FIS directory");
if (fis_fd < 0)
goto error;
close(fis_fd);
fis_fd = mtd_open("FIS directory", true);
if (fis_fd < 0)
goto error;
fis_erasesize = erasesize;
desc = mmap(NULL, erasesize, PROT_READ|PROT_WRITE, MAP_SHARED, fis_fd, 0);
if (desc == MAP_FAILED)
goto error;
fis_desc = desc;
return desc;
error:
fis_close();
return NULL;
}
static int
mtd_unlock(const char *mtd)
{
int fd;
struct erase_info_user mtdLockInfo;
fd = mtd_check_open(mtd);
if(fd <= 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
exit(1);
}
if (quiet < 2)
fprintf(stderr, "Unlocking %s ...\n", mtd);
mtdLockInfo.start = 0;
mtdLockInfo.length = mtdsize;
if(ioctl(fd, MEMUNLOCK, &mtdLockInfo)) {
close(fd);
return 0;
}
close(fd);
return 0;
}
static int
mtd_verify(const char *mtd, char *file)
{
uint32_t f_md5[4], m_md5[4];
struct stat s;
md5_ctx_t ctx;
int ret = 0;
int fd;
if (quiet < 2)
fprintf(stderr, "Verifying %s against %s ...\n", mtd, file);
if (stat(file, &s) || md5sum(file, f_md5)) {
fprintf(stderr, "Failed to hash %s\n", file);
return -1;
}
fd = mtd_check_open(mtd);
if(fd < 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
return -1;
}
md5_begin(&ctx);
do {
char buf[256];
int len = (s.st_size > sizeof(buf)) ? (sizeof(buf)) : (s.st_size);
int rlen = read(fd, buf, len);
if (rlen < 0) {
if (errno == EINTR)
continue;
ret = -1;
goto out;
}
if (!rlen)
break;
md5_hash(buf, rlen, &ctx);
s.st_size -= rlen;
} while (s.st_size > 0);
md5_end(m_md5, &ctx);
fprintf(stderr, "%08x%08x%08x%08x - %s\n", m_md5[0], m_md5[1], m_md5[2], m_md5[3], mtd);
fprintf(stderr, "%08x%08x%08x%08x - %s\n", f_md5[0], f_md5[1], f_md5[2], f_md5[3], file);
ret = memcmp(f_md5, m_md5, sizeof(m_md5));
if (!ret)
fprintf(stderr, "Success\n");
else
fprintf(stderr, "Failed\n");
out:
close(fd);
return ret;
}
static int
mtd_dump(const char *mtd, int part_offset, int size)
{
int ret = 0, offset = 0;
int fd;
char *buf;
if (quiet < 2)
fprintf(stderr, "Dumping %s ...\n", mtd);
fd = mtd_check_open(mtd);
if(fd < 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
return -1;
}
if (!size)
size = mtdsize;
if (part_offset)
lseek(fd, part_offset, SEEK_SET);
buf = malloc(erasesize);
if (!buf)
return -1;
do {
int len = (size > erasesize) ? (erasesize) : (size);
int rlen = read(fd, buf, len);
if (rlen < 0) {
if (errno == EINTR)
continue;
ret = -1;
goto out;
}
if (!rlen || rlen != len)
break;
if (mtd_block_is_bad(fd, offset)) {
fprintf(stderr, "skipping bad block at 0x%08x\n", offset);
} else {
size -= rlen;
write(1, buf, rlen);
}
offset += rlen;
} while (size > 0);
out:
close(fd);
return ret;
}
static int mtd_check(const char *mtd)
{
int fd;
fd = mtd_check_open(mtd);
if (!fd)
return 0;
if (!buf)
buf = malloc(erasesize);
close(fd);
return 1;
}
static int
mtd_unlock(const char *mtd)
{
struct erase_info_user mtdLockInfo;
char *next = NULL;
char *str = NULL;
int fd;
if (strchr(mtd, ':')) {
str = strdup(mtd);
mtd = str;
}
do {
next = strchr(mtd, ':');
if (next) {
*next = 0;
next++;
}
fd = mtd_check_open(mtd);
if(fd < 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
exit(1);
}
if (quiet < 2)
fprintf(stderr, "Unlocking %s ...\n", mtd);
mtdLockInfo.start = 0;
mtdLockInfo.length = mtdsize;
ioctl(fd, MEMUNLOCK, &mtdLockInfo);
close(fd);
mtd = next;
} while (next);
if (str)
free(str);
return 0;
}
static int
mtd_write(int imagefd, const char *mtd, char *fis_layout, size_t part_offset)
{
char *next = NULL;
char *str = NULL;
int fd, result;
ssize_t r, w, e;
ssize_t skip = 0;
uint32_t offset = 0;
int jffs2_replaced = 0;
int skip_bad_blocks = 0;
#ifdef FIS_SUPPORT
static struct fis_part new_parts[MAX_ARGS];
static struct fis_part old_parts[MAX_ARGS];
int n_new = 0, n_old = 0;
if (fis_layout) {
const char *tmp = mtd;
char *word, *brkt;
int ret;
memset(&old_parts, 0, sizeof(old_parts));
memset(&new_parts, 0, sizeof(new_parts));
do {
next = strchr(tmp, ':');
if (!next)
next = (char *) tmp + strlen(tmp);
memcpy(old_parts[n_old].name, tmp, next - tmp);
n_old++;
tmp = next + 1;
} while(*next);
for (word = strtok_r(fis_layout, ",", &brkt);
word;
word = strtok_r(NULL, ",", &brkt)) {
tmp = strtok(word, ":");
strncpy((char *) new_parts[n_new].name, tmp, sizeof(new_parts[n_new].name) - 1);
tmp = strtok(NULL, ":");
if (!tmp)
goto next;
new_parts[n_new].size = strtoul(tmp, NULL, 0);
tmp = strtok(NULL, ":");
if (!tmp)
goto next;
new_parts[n_new].loadaddr = strtoul(tmp, NULL, 16);
next:
n_new++;
}
ret = fis_validate(old_parts, n_old, new_parts, n_new);
if (ret < 0) {
fprintf(stderr, "Failed to validate the new FIS partition table\n");
exit(1);
}
if (ret == 0)
fis_layout = NULL;
}
#endif
if (strchr(mtd, ':')) {
str = strdup(mtd);
mtd = str;
}
r = 0;
resume:
next = strchr(mtd, ':');
if (next) {
*next = 0;
next++;
}
fd = mtd_check_open(mtd);
if(fd < 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
exit(1);
}
if (part_offset > 0) {
fprintf(stderr, "Seeking on mtd device '%s' to: %zu\n", mtd, part_offset);
lseek(fd, part_offset, SEEK_SET);
}
indicate_writing(mtd);
w = e = 0;
for (;;) {
/* buffer may contain data already (from trx check or last mtd partition write attempt) */
while (buflen < erasesize) {
r = read(imagefd, buf + buflen, erasesize - buflen);
if (r < 0) {
if ((errno == EINTR) || (errno == EAGAIN))
continue;
else {
perror("read");
break;
}
}
if (r == 0)
break;
buflen += r;
}
if (buflen == 0)
break;
if (buflen < erasesize) {
/* Pad block to eraseblock size */
memset(&buf[buflen], 0xff, erasesize - buflen);
buflen = erasesize;
}
if (skip > 0) {
skip -= buflen;
buflen = 0;
if (skip <= 0)
indicate_writing(mtd);
continue;
}
if (jffs2file && w >= jffs2_skip_bytes) {
if (memcmp(buf, JFFS2_EOF, sizeof(JFFS2_EOF) - 1) == 0) {
if (!quiet)
fprintf(stderr, "\b\b\b ");
if (quiet < 2)
fprintf(stderr, "\nAppending jffs2 data from %s to %s...", jffs2file, mtd);
/* got an EOF marker - this is the place to add some jffs2 data */
skip = mtd_replace_jffs2(mtd, fd, e, jffs2file);
jffs2_replaced = 1;
/* don't add it again */
jffs2file = NULL;
w += skip;
e += skip;
skip -= buflen;
buflen = 0;
offset = 0;
continue;
}
/* no EOF marker, make sure we figure out the last inode number
* before appending some data */
mtd_parse_jffs2data(buf, jffs2dir);
}
/* need to erase the next block before writing data to it */
if(!no_erase)
{
while (w + buflen > e - skip_bad_blocks) {
if (!quiet)
fprintf(stderr, "\b\b\b[e]");
if (mtd_block_is_bad(fd, e)) {
if (!quiet)
fprintf(stderr, "\nSkipping bad block at 0x%08zx ", e);
skip_bad_blocks += erasesize;
e += erasesize;
// Move the file pointer along over the bad block.
lseek(fd, erasesize, SEEK_CUR);
continue;
}
if (mtd_erase_block(fd, e) < 0) {
if (next) {
if (w < e) {
write(fd, buf + offset, e - w);
offset = e - w;
}
w = 0;
e = 0;
close(fd);
mtd = next;
fprintf(stderr, "\b\b\b \n");
goto resume;
} else {
fprintf(stderr, "Failed to erase block\n");
exit(1);
}
}
/* erase the chunk */
e += erasesize;
}
}
if (!quiet)
fprintf(stderr, "\b\b\b[w]");
if ((result = write(fd, buf + offset, buflen)) < buflen) {
if (result < 0) {
fprintf(stderr, "Error writing image.\n");
exit(1);
} else {
fprintf(stderr, "Insufficient space.\n");
exit(1);
}
}
w += buflen;
buflen = 0;
offset = 0;
}
if (jffs2_replaced && trx_fixup) {
trx_fixup(fd, mtd);
}
if (!quiet)
fprintf(stderr, "\b\b\b\b ");
if (quiet < 2)
fprintf(stderr, "\n");
#ifdef FIS_SUPPORT
if (fis_layout) {
if (fis_remap(old_parts, n_old, new_parts, n_new) < 0)
fprintf(stderr, "Failed to update the FIS partition table\n");
}
#endif
close(fd);
return 0;
}
int mtd_write_jffs2(const char *mtd, const char *filename, const char *dir)
{
int err = -1, fdeof = 0;
outfd = mtd_check_open(mtd);
if (outfd < 0)
return -1;
if (quiet < 2)
fprintf(stderr, "Appending %s to jffs2 partition %s\n", filename, mtd);
buf = malloc(erasesize);
if (!buf) {
fprintf(stderr, "Out of memory!\n");
goto done;
}
if (!*dir)
target_ino = 1;
/* parse the structure of the jffs2 first
* locate the directory that the file is going to be placed in */
for(;;) {
struct jffs2_unknown_node *node = (struct jffs2_unknown_node *) buf;
if (read(outfd, buf, erasesize) != erasesize) {
fdeof = 1;
break;
}
mtdofs += erasesize;
if (node->magic == 0x8519) {
fprintf(stderr, "Error: wrong endianness filesystem\n");
goto done;
}
/* assume no magic == end of filesystem
* the filesystem will probably end with be32(0xdeadc0de) */
if (node->magic != 0x1985)
break;
mtd_parse_jffs2data(buf, dir);
}
if (fdeof) {
fprintf(stderr, "Error: No room for additional data\n");
goto done;
}
/* jump back one eraseblock */
mtdofs -= erasesize;
lseek(outfd, mtdofs, SEEK_SET);
ofs = 0;
if (!last_ino)
last_ino = 1;
if (!target_ino)
target_ino = add_dir(dir, 1);
add_file(filename, target_ino);
pad(erasesize);
/* add eof marker, pad to eraseblock size and write the data */
add_data(JFFS2_EOF, sizeof(JFFS2_EOF) - 1);
pad(erasesize);
err = 0;
#ifdef target_brcm
trx_fixup(outfd, mtd);
#endif
done:
close(outfd);
if (buf)
free(buf);
return err;
}
static int
mtd_write(int imagefd, const char *mtd)
{
int fd, result;
ssize_t r, w, e;
fd = mtd_check_open(mtd);
if(fd < 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
exit(1);
}
if (quiet < 2)
fprintf(stderr, "Writing from %s to %s ... ", imagefile, mtd);
r = w = e = 0;
if (!quiet)
fprintf(stderr, " [ ]");
for (;;) {
/* buffer may contain data already (from trx check) */
do {
r = read(imagefd, buf + buflen, erasesize - buflen);
if (r < 0) {
if ((errno == EINTR) || (errno == EAGAIN))
continue;
else {
perror("read");
break;
}
}
if (r == 0)
break;
buflen += r;
} while (buflen < erasesize);
if (buflen == 0)
break;
if (jffs2file) {
if (memcmp(buf, JFFS2_EOF, sizeof(JFFS2_EOF)) == 0) {
if (!quiet)
fprintf(stderr, "\b\b\b ");
if (quiet < 2)
fprintf(stderr, "\nAppending jffs2 data to from %s to %s...", jffs2file, mtd);
/* got an EOF marker - this is the place to add some jffs2 data */
mtd_replace_jffs2(mtd, fd, e, jffs2file);
goto done;
}
/* no EOF marker, make sure we figure out the last inode number
* before appending some data */
mtd_parse_jffs2data(buf, jffs2dir);
}
/* need to erase the next block before writing data to it */
while (w + buflen > e) {
if (!quiet)
fprintf(stderr, "\b\b\b[e]");
mtd_erase_block(fd, e);
/* erase the chunk */
e += erasesize;
}
if (!quiet)
fprintf(stderr, "\b\b\b[w]");
if ((result = write(fd, buf, buflen)) < buflen) {
if (result < 0) {
fprintf(stderr, "Error writing image.\n");
exit(1);
} else {
fprintf(stderr, "Insufficient space.\n");
exit(1);
}
}
w += buflen;
buflen = 0;
}
if (!quiet)
fprintf(stderr, "\b\b\b\b");
done:
if (quiet < 2)
fprintf(stderr, "\n");
close(fd);
return 0;
}
int
mtd_fixwrgg(const char *mtd, size_t offset, size_t data_size)
{
int fd;
char *first_block;
ssize_t res;
size_t block_offset;
size_t data_offset;
struct wrgg03_header *shdr;
if (quiet < 2)
fprintf(stderr, "Trying to fix WRGG header in %s at 0x%x...\n",
mtd, offset);
block_offset = offset & ~(erasesize - 1);
offset -= block_offset;
fd = mtd_check_open(mtd);
if(fd < 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
exit(1);
}
if (block_offset + erasesize > mtdsize) {
fprintf(stderr, "Offset too large, device size 0x%x\n",
mtdsize);
exit(1);
}
first_block = malloc(erasesize);
if (!first_block) {
perror("malloc");
exit(1);
}
res = pread(fd, first_block, erasesize, block_offset);
if (res != erasesize) {
perror("pread");
exit(1);
}
shdr = (struct wrgg03_header *)(first_block + offset);
/* The magic is always stored in little-endian byte order */
if (le32_to_cpu((uint8_t *)&shdr->magic1) != WRGG03_MAGIC) {
fprintf(stderr, "magic1 = %x\n", shdr->magic1);
fprintf(stderr, "WRGG03_MAGIC = %x\n", WRGG03_MAGIC);
fprintf(stderr, "No WRGG header found\n");
exit(1);
} else if (!shdr->size) {
fprintf(stderr, "WRGG entity with empty image\n");
exit(1);
}
data_offset = offset + sizeof(struct wrgg03_header);
if (!data_size)
data_size = mtdsize - data_offset;
if (data_size > shdr->size)
data_size = shdr->size;
if (wrgg_fix_md5(shdr, fd, data_offset, data_size))
goto out;
if (mtd_erase_block(fd, block_offset)) {
fprintf(stderr, "Can't erease block at 0x%x (%s)\n",
block_offset, strerror(errno));
exit(1);
}
if (quiet < 2)
fprintf(stderr, "Rewriting block at 0x%x\n", block_offset);
if (pwrite(fd, first_block, erasesize, block_offset) != erasesize) {
fprintf(stderr, "Error writing block (%s)\n", strerror(errno));
exit(1);
}
if (quiet < 2)
fprintf(stderr, "Done.\n");
out:
close (fd);
sync();
return 0;
}
static int
mtd_fixtrx(const char *mtd, size_t offset)
{
int fd;
struct trx_header *trx;
char *buf;
ssize_t res;
size_t block_offset;
if (quiet < 2)
fprintf(stderr, "Trying to fix trx header in %s at 0x%x...\n", mtd, offset);
block_offset = offset & ~(erasesize - 1);
offset -= block_offset;
fd = mtd_check_open(mtd);
if(fd < 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
exit(1);
}
if (block_offset + erasesize > mtdsize) {
fprintf(stderr, "Offset too large, device size 0x%x\n", mtdsize);
exit(1);
}
buf = malloc(erasesize);
if (!buf) {
perror("malloc");
exit(1);
}
res = pread(fd, buf, erasesize, block_offset);
if (res != erasesize) {
perror("pread");
exit(1);
}
trx = (struct trx_header *) (buf + offset);
if (trx->magic != STORE32_LE(0x30524448)) {
fprintf(stderr, "No trx magic found\n");
exit(1);
}
if (trx->len == STORE32_LE(erasesize - offset)) {
if (quiet < 2)
fprintf(stderr, "Header already fixed, exiting\n");
close(fd);
return 0;
}
trx->len = STORE32_LE(erasesize - offset);
trx->crc32 = STORE32_LE(crc32buf((char*) &trx->flag_version, erasesize - offset - 3*4));
if (mtd_erase_block(fd, block_offset)) {
fprintf(stderr, "Can't erease block at 0x%x (%s)\n", block_offset, strerror(errno));
exit(1);
}
if (quiet < 2)
fprintf(stderr, "New crc32: 0x%x, rewriting block\n", trx->crc32);
if (pwrite(fd, buf, erasesize, block_offset) != erasesize) {
fprintf(stderr, "Error writing block (%s)\n", strerror(errno));
exit(1);
}
if (quiet < 2)
fprintf(stderr, "Done.\n");
close (fd);
sync();
return 0;
}
int
mtd_fixseama(const char *mtd, size_t offset)
{
int fd;
char *first_block;
ssize_t res;
size_t block_offset;
size_t data_offset;
size_t data_size;
struct seama_entity_header *shdr;
if (quiet < 2)
fprintf(stderr, "Trying to fix SEAMA header in %s at 0x%x...\n",
mtd, offset);
block_offset = offset & ~(erasesize - 1);
offset -= block_offset;
fd = mtd_check_open(mtd);
if(fd < 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
exit(1);
}
if (block_offset + erasesize > mtdsize) {
fprintf(stderr, "Offset too large, device size 0x%x\n",
mtdsize);
exit(1);
}
first_block = malloc(erasesize);
if (!first_block) {
perror("malloc");
exit(1);
}
res = pread(fd, first_block, erasesize, block_offset);
if (res != erasesize) {
perror("pread");
exit(1);
}
shdr = (struct seama_entity_header *)(first_block + offset);
if (shdr->magic != htonl(SEAMA_MAGIC)) {
fprintf(stderr, "No SEAMA header found\n");
exit(1);
} else if (!ntohl(shdr->size)) {
fprintf(stderr, "Seama entity with empty image\n");
exit(1);
}
data_offset = offset + sizeof(struct seama_entity_header) + ntohs(shdr->metasize);
data_size = mtdsize - data_offset;
if (data_size > ntohl(shdr->size))
data_size = ntohl(shdr->size);
if (seama_fix_md5(shdr, fd, data_offset, data_size))
goto out;
if (mtd_erase_block(fd, block_offset)) {
fprintf(stderr, "Can't erease block at 0x%x (%s)\n",
block_offset, strerror(errno));
exit(1);
}
if (quiet < 2)
fprintf(stderr, "Rewriting block at 0x%x\n", block_offset);
if (pwrite(fd, first_block, erasesize, block_offset) != erasesize) {
fprintf(stderr, "Error writing block (%s)\n", strerror(errno));
exit(1);
}
if (quiet < 2)
fprintf(stderr, "Done.\n");
out:
close (fd);
sync();
return 0;
}
int mtd_resetbc(const char *mtd)
{
struct mtd_info_user mtd_info;
struct bootcounter *curr = (struct bootcounter *)page;
unsigned int i;
unsigned int bc_offset_increment;
int last_count = 0;
int num_bc;
int fd;
int ret;
int retval = 0;
DLOG_OPEN();
fd = mtd_check_open(mtd);
if (ioctl(fd, MEMGETINFO, &mtd_info) < 0) {
DLOG_ERR("Unable to obtain mtd_info for given partition name.");
retval = -1;
goto out;
}
/* Detect need to override increment (for EA6350v3) */
if (mtd_info.writesize < BC_OFFSET_INCREMENT_MIN) {
bc_offset_increment = BC_OFFSET_INCREMENT_MIN;
DLOG_DEBUG("Offset increment set to %i for writesize of %i",
bc_offset_increment, mtd_info.writesize);
} else {
bc_offset_increment = mtd_info.writesize;
}
num_bc = mtd_info.size / bc_offset_increment;
for (i = 0; i < num_bc; i++) {
pread(fd, curr, sizeof(*curr), i * bc_offset_increment);
/* Existing code assumes erase is to 0xff; left as-is (2019) */
if (curr->magic != BOOTCOUNT_MAGIC &&
curr->magic != 0xffffffff) {
DLOG_ERR("Unexpected magic %08x at offset %08x; aborting.",
curr->magic, i * bc_offset_increment);
retval = -2;
goto out;
}
if (curr->magic == 0xffffffff)
break;
last_count = curr->count;
}
if (last_count == 0) { /* bootcount is already 0 */
retval = 0;
goto out;
}
if (i == num_bc) {
DLOG_NOTICE("Boot-count log full with %i entries; erasing (expected occasionally).",
i);
struct erase_info_user erase_info;
erase_info.start = 0;
erase_info.length = mtd_info.size;
ret = ioctl(fd, MEMERASE, &erase_info);
if (ret < 0) {
DLOG_ERR("Failed to erase boot-count log MTD; ioctl() MEMERASE returned %i",
ret);
retval = -3;
goto out;
}
i = 0;
}
memset(curr, 0xff, bc_offset_increment);
curr->magic = BOOTCOUNT_MAGIC;
curr->count = 0;
curr->checksum = BOOTCOUNT_MAGIC;
/* Assumes bc_offset_increment is a multiple of mtd_info.writesize */
ret = pwrite(fd, curr, bc_offset_increment, i * bc_offset_increment);
if (ret < 0) {
DLOG_ERR("Failed to write boot-count log entry; pwrite() returned %i",
errno);
retval = -4;
goto out;
} else {
sync();
DLOG_NOTICE("Boot count sucessfully reset to zero.");
retval = 0;
goto out;
}
out:
close(fd);
return retval;
}