Re: How to tell if a network interface was renamed (and from what)

> On 20. Nov 2023, at 21:56, Kristof Provost <kp@FreeBSD.org> wrote:
> 
> I’d look in the direction of just adding a field to struct ifnet with the original interface name (likely easily done in if_attach()), along with a new ioctl to retrieve that field.

ifconfig_get_orig_name() already exists, but apart from wlandebug
nothing is using it.

The internally used IFDATA_DRIVERNAME also appears in ifinfo
(not installed in base) and bsnmpd but that's it.

if_dname is the target and it exists in ifnet struct along with
a man page entry in inet(9).

All that is really missing is a way to print it via ifconfig command.


Cheers,
Franco