static void GCC_FMT_ATTR(2, 3) blkverify_err(BlkverifyAIOCB *acb, const char *fmt, ...) { va_list ap; va_start(ap, fmt); fprintf(stderr, "blkverify: %s sector_num=%" PRId64 " nb_sectors=%d ", acb->is_write ? "write" : "read", acb->sector_num, acb->nb_sectors); vfprintf(stderr, fmt, ap); fprintf(stderr, "\n"); va_end(ap); exit(1); }