snprintf(path, PATH_MAX, "%s/%s", av[1], dirent->d_name);
        stat(path, &statbuf);
        if (S_ISREG(statbuf.st_mode) && statbuf.st_uid == uid && isupper((unsigned char) (dirent->d_name[0]))) {
            sum += statbuf.st_size;
        }