How I know the net card is link off?

[canbaby]

In linux, c program, How I know the net card's link is off?
I had no idea now.
Thanks

 

[Stephan Ferraro]

In linux, c program, How I know the net card's link is off?
I had no idea now.

It's not ANSI C but I will answer you always:
Probably with an ioctl call but I'm not sure.
Try to get and understand the source code of the package "mii-tool" in
Linux.
http://nibiru.borg.metux.de:7000/wiki/index.php/mii-tool

 

[Joe Wright]

In linux, c program, How I know the net card's link is off?
I had no idea now.
Thanks

What do you think "net card's link is off" means in a C language group?
Go away now, get a clue, and if you still need c.l.c, come on back.

 

[canbaby]

Can you gave me a clue? If you had a clue.
I know I get in the wrong door, sorry.

 

[canbaby]

I try it, all run ok, thanks.