FPIN
if ((t->t_dflg & FPIN) == 0 && t->t_dlef) {
if (didfds==0 && t->t_dflg&FPIN) {
(t->t_dflg & (FPIN|FAND|FDIAG|FINT));
t->t_dcdr->t_dflg |= FPIN |
} else if (flags & FPIN) {
right = makefork(FPIN, term(NLFLG));
if (treeflgs & FPIN)
if (treeflgs & FPIN)