Are there events when eth carrier changes state?

Are there events when eth carrier changes state?

[Karl O. Pinc]

Hi,

I see that eth0 has a ATTR{carrier}.
Are there any events that could be used
to trigger RUN rules when that changes?

How about ATTR{operstate}?

If not, is there somewhere I should be
looking besides udev?

There's a comment in the list archives
back in 2001 from Andrew Morton saying
that "better netdevice manageability"
is a goal, but I can't find any
further reference.

Thank you.

Karl <kop@meme.com>
Free Software:  "You don't pay back, you pay forward."
                  -- Robert A. Heinlein

Re: Are there events when eth carrier changes state?

[Kay Sievers]

On Fri, Nov 21, 2008 at 19:24, Karl O. Pinc <kop@meme.com> wrote:
> I see that eth0 has a ATTR{carrier}.
> Are there any events that could be used
> to trigger RUN rules when that changes?

No, there are no events for network interface state changes. Network
interface events have their own netlink NETLINK_ROUTE socket to listen
to events.

NetworkManager does all link handling on the desktop. Tiny custom
setups can use stuff like ifplugd to hook into these events.

Kay