It still uses non-y2038 internal interfaces:

157           if (len > strlen (suffix)
158               && strcmp (ent->d_name + len - strlen (suffix), suffix) == 0)
159             {
160               char *conf;
161               struct stat64 st;
162               if (asprintf (&conf, "%s/%s", buf, ent->d_name) < 0)
163                 continue;
164 
165               if (ent->d_type != DT_UNKNOWN
166                   || (lstat64 (conf, &st) != -1 && S_ISREG (st.st_mode)))
167                 found |= read_conf_file (conf, dir, dir_len);
168