int mtd_get_dev_info1(libmtd_t desc, int dev_num, struct mtd_dev_info *mtd)
{
int ret;
struct stat st;
struct libmtd *lib = (struct libmtd *)desc;
memset(mtd, 0, sizeof(struct mtd_dev_info));
mtd->dev_num = dev_num;
if (!lib->sysfs_supported)
return legacy_get_dev_info1(dev_num, mtd);
else {
char file[strlen(lib->mtd) + 10];
sprintf(file, lib->mtd, dev_num);
if (stat(file, &st)) {
if (errno == ENOENT)
errno = ENODEV;
return -1;
}
}
if (dev_get_major(lib, dev_num, &mtd->major, &mtd->minor))
return -1;
ret = dev_read_data(lib->mtd_name, dev_num, &mtd->name,
MTD_NAME_MAX + 1);
if (ret < 0)
return -1;
((char *)mtd->name)[ret - 1] = '\0';
ret = dev_read_data(lib->mtd_type, dev_num, &mtd->type_str,
MTD_TYPE_MAX + 1);
if (ret < 0)
return -1;
((char *)mtd->type_str)[ret - 1] = '\0';
if (dev_read_pos_int(lib->mtd_eb_size, dev_num, &mtd->eb_size))
return -1;
if (dev_read_pos_ll(lib->mtd_size, dev_num, &mtd->size))
return -1;
if (dev_read_pos_int(lib->mtd_min_io_size, dev_num, &mtd->min_io_size))
return -1;
if (dev_read_pos_int(lib->mtd_subpage_size, dev_num, &mtd->subpage_size))
return -1;
if (dev_read_pos_int(lib->mtd_oob_size, dev_num, &mtd->oob_size))
return -1;
if (dev_read_pos_int(lib->mtd_region_cnt, dev_num, &mtd->region_cnt))
return -1;
if (dev_read_hex_int(lib->mtd_flags, dev_num, &ret))
return -1;
mtd->writable = !!(ret & MTD_WRITEABLE);
mtd->eb_cnt = mtd->size / mtd->eb_size;
mtd->type = type_str2int(mtd->type_str);
mtd->bb_allowed = !!(mtd->type == MTD_NANDFLASH);
return 0;
}
/**
* find_dev_num - find UBI device number by its character device node.
*
* @lib UBI library descriptor
* @node UBI character device node name
*
* This function returns positive UBI device number in case of success and %-1
* in case of failure.
*/
static int find_dev_num(struct libubi *lib, const char *node)
{
struct stat stat;
struct ubi_info info;
int i, major, minor;
if (lstat(node, &stat))
return -1;
if (!S_ISCHR(stat.st_mode)) {
errno = EINVAL;
return -1;
}
major = major(stat.st_rdev);
minor = minor(stat.st_rdev);
if (minor != 0) {
errno = -EINVAL;
return -1;
}
if (ubi_get_info((libubi_t *)lib, &info))
return -1;
for (i = info.lowest_dev_num; i <= info.highest_dev_num; i++) {
int major1, minor1, ret;
char buf[50];
ret = dev_read_data(lib->dev_dev, i, &buf[0], 50);
if (ret < 0)
return -1;
ret = sscanf(&buf[0], "%d:%d\n", &major1, &minor1);
if (ret != 2) {
fprintf(stderr, "LIBUBI: bad value at sysfs file\n");
errno = EINVAL;
return -1;
}
if (minor1 == minor && major1 == major)
return i;
}
errno = ENOENT;
return -1;
}