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