M_MAP
sp->s_flags |= M_MAP;
if (sp->s_flags & M_MAP) (void) printf("M_MAP ");
if ((perm & (M_ROOT | M_NONE | M_MAP)) == 0) {
if ((perm & (M_ROOT | M_NONE | M_MAP)) == 0 && (ngroups_max <= NGRPS ||