RP
&SU, &DS, &RP, &FL, &WE, &LN, 0
len = printf("%s changed\n", RP(p)); \
len = printf("%s: ", RP(p)); \
mtree_err("%s: %s", RP(parent), strerror(errno));
warnx("%s: %s", RP(p), strerror(p->fts_errno));
printf("extra: %s", RP(p));