netdev - Use ioctl() to list all network interfaces.

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Date:	Thu, 6 Jan 2011 23:33:39 +0800
From:	Chin Shi Hong <cshong87@...il.com>
To:	netdev@...r.kernel.org
Subject: Use ioctl() to list all network interfaces.

Dear all,

The following codes are just part of my application's source codes:

--begin of some codes--
ifconf ifc;
ret = ioctl(n, SIOCGIFCONF,&ifc);
--End of some codes--

My application's role is to display all network interfaces, including
the network interface which are down.

However, with the above codes, my application only display the network
interface which are already up. The network interface which are down
will not be displayed.

So, what can I do to make my application display all network
interfaces, including the network interface which are down?

regards,
--
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