snprintf_blkptr
snprintf_blkptr(blkbuf, sizeof (blkbuf), &blk);
snprintf_blkptr(blkbuf, buflen, bp);
snprintf_blkptr(blkbuf, sizeof (blkbuf), &ds->ds_bp);
snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
(void) snprintf_blkptr(blkbuf + strlen(blkbuf),
snprintf_blkptr(blkbuf, sizeof (blkbuf), &ub->ub_rootbp);
snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
snprintf_blkptr(blkbuf + strlen(blkbuf),
snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
snprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, bp); \
snprintf_blkptr(__blkbuf, BP_SPRINTF_LEN, (bp)); \
extern void snprintf_blkptr(char *buf, size_t buflen, const blkptr_t *bp);