push (@flags, "OPF_EXTENSION") if $op->{EXTENSION};
push (@flags, "OPF_UNIMPLEMENTED") if $op->{UNIMPLEMENTED};
push (@flags, "OPF_PERM_ONLY") if $op->{PERM_ONLY};
push (@flags, "OPF_EXTENSION") if $op->{EXTENSION};
push (@flags, "OPF_UNIMPLEMENTED") if $op->{UNIMPLEMENTED};
push (@flags, "OPF_PERM_ONLY") if $op->{PERM_ONLY};