Filipe Abrantes wrote:
Hi all,
I need to detect when an interface (wired ethernet) has link up/down. Is
there a system signal which is sent when this happens? What is the best
way to this programatically?
Best Regards
Filipe
The best way is to open a netlink socket and look for the mesaages about
link up/down there. Read iproute2 http://developer.osdl.org/dev/iproute2
source for ip command (ipmonitor.c).
This works for almost all devices unlike ethtool and mii which only
work on a small subset of devices.
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