ISDOT
#define ISDOTDOT(c) (UC(c)[0] == '.' && ISDOT(&((c)[1])))
if (ISDOT(cp)) {
if (ISDOT(p)) {
if (!ISSET(FTS_SEEDOT) && ISDOT(dp->d_name))
if (ISDOT(p->fts_name))