Re: [patch net-next 1/2] ip: add support for alternative name addition/deletion/list

[Stephen Hemminger]

On Mon, 30 Sep 2019 11:59:02 +0200
Jiri Pirko <j...@resnulli.us> wrote:

> +             open_json_array(PRINT_JSON, "altnames");
> +             for (i = RTA_DATA(proplist); RTA_OK(i, rem);
> +                  i = RTA_NEXT(i, rem)) {
> +                     if (i->rta_type != IFLA_ALT_IFNAME)
> +                             continue;
> +                     print_string(PRINT_FP, "NULL", "%s    altname ", _SL_);

You can pass real NULL versus quoted NULL when doing print to file only