get_vlan_id
if (get_vlan_id(argv[1], &req.ifbr_pvid) < 0)
if (get_vlan_id(argv[arg], &req.ifba_vlan) < 0)
if (get_vlan_id(argv[arg], &req.ifba_vlan) < 0)
static int get_vlan_id(const char *cp, ether_vlanid_t *valp);
if (get_vlan_id(vlanid, &req.ifbr_pvid) < 0)
if (get_vlan_id(arg, &req.ifbrp_defpvid) < 0)