register_interface
struct interface_info *register_interface(const char *,
if ((sp->intf = register_interface(argv[0], got_one,
register_interface(interfaces->name, got_one, 0) == NULL)
struct interface_info *register_interface(const char *,
sp->intf = register_interface(sp->intf->name,
interfaces = register_interface(interfaces->name, got_one);