+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;
+}
+