Xin LI wrote:
The only question I have would be, that is it possible to uniquely
identify a NIC without assistance from kernel?  For instance, one can
change an interface from being called "em0" to "eth0" and from "bge0" to
"em0".  It's easy to track this information through ifconfig(8) with a
callback, clean up the file upon restart, but we can not prevent other
programs from calling IOCSIFNAME on the interface.  Any idea for this?

What about using interface index as a key(see if_nameindex(3))?

--
WBR, Andrey V. Elsukov
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