diff options
| -rw-r--r-- | package/mtd/src/mtd.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/package/mtd/src/mtd.c b/package/mtd/src/mtd.c index a7d4c1b857..92873ca19b 100644 --- a/package/mtd/src/mtd.c +++ b/package/mtd/src/mtd.c @@ -286,7 +286,7 @@ indicate_writing(const char *mtd) } static int -mtd_write(int imagefd, const char *mtd, char *fis_layout) +mtd_write(int imagefd, const char *mtd, char *fis_layout, size_t part_offset) { char *next = NULL; char *str = NULL; @@ -370,6 +370,11 @@ resume: exit(1); } + if (part_offset > 0) { + fprintf(stderr, "Seeking on mtd device '%s' to: %u\n", mtd, part_offset); + lseek(fd, part_offset, SEEK_SET); + } + indicate_writing(mtd); w = e = 0; @@ -509,7 +514,7 @@ static void usage(void) fprintf(stderr, " fixtrx fix the checksum in a trx header on first boot\n"); } - fprintf(stderr, + fprintf(stderr, "Following options are available:\n" " -q quiet mode (once: no [w] on writing,\n" " twice: no status messages)\n" @@ -518,7 +523,8 @@ static void usage(void) " -f force write without trx checks\n" " -e <device> erase <device> before executing the command\n" " -d <name> directory for jffs2write, defaults to \"tmp\"\n" - " -j <name> integrate <file> into jffs2 data when writing an image\n"); + " -j <name> integrate <file> into jffs2 data when writing an image\n" + " -p write beginning at partition offset\n"); if (mtd_fixtrx) { fprintf(stderr, " -o offset offset of the image header in the partition(for fixtrx)\n"); @@ -554,7 +560,7 @@ int main (int argc, char **argv) int ch, i, boot, imagefd = 0, force, unlocked; char *erase[MAX_ARGS], *device = NULL; char *fis_layout = NULL; - size_t offset = 0; + size_t offset = 0, part_offset = 0; enum { CMD_ERASE, CMD_WRITE, @@ -575,7 +581,7 @@ int main (int argc, char **argv) #ifdef FIS_SUPPORT "F:" #endif - "frnqe:d:j:o:")) != -1) + "frnqe:d:j:p:o:")) != -1) switch (ch) { case 'f': force = 1; @@ -603,6 +609,14 @@ int main (int argc, char **argv) case 'd': jffs2dir = optarg; break; + case 'p': + errno = 0; + part_offset = strtoul(optarg, 0, 0); + if (errno) { + fprintf(stderr, "-p: illegal numeric string\n"); + usage(); + } + break; case 'o': if (!mtd_fixtrx) { fprintf(stderr, "-o: is not available on this platform\n"); @@ -704,7 +718,7 @@ int main (int argc, char **argv) case CMD_WRITE: if (!unlocked) mtd_unlock(device); - mtd_write(imagefd, device, fis_layout); + mtd_write(imagefd, device, fis_layout, part_offset); break; case CMD_JFFS2WRITE: if (!unlocked) |