DIR_CHUNKSIZE
if ((dh->dbuf = calloc(1, DIR_CHUNKSIZE)) == NULL) {
dh->reslen = dh->bufsize = DIR_CHUNKSIZE;
dh->dbuf = realloc(dh->dbuf, dh->bufsize + DIR_CHUNKSIZE);
dh->reslen += DIR_CHUNKSIZE;
dh->bufsize += DIR_CHUNKSIZE;