From mboxrd@z Thu Jan  1 00:00:00 1970
From: "David S. Miller" <davem@redhat.com>
Subject: Re: SIOCETHTOOL history ?
Date: Tue, 06 May 2003 04:49:26 -0700 (PDT)
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To: akumar@omnesysindia.com
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   From: "arun" <akumar@omnesysindia.com>
   Date: Tue, 6 May 2003 18:07:48 +0530
   
   I have used SIOCGMIIPHY before and it seemed not to require 
   any su rights or capabilities.

Yes it does:

                /*
                 *      These ioctl calls:
                 *      - require superuser power.
                 *      - require strict serialization.
                 *      - return a value
                 */
                case SIOCETHTOOL:
                case SIOCGMIIPHY:
                case SIOCGMIIREG:
                        if (!capable(CAP_NET_ADMIN))
                                return -EPERM;