Linux下枚举系统中网卡的信息(二)

puts("");
puts("");
}
#endif
if (!(ioctl (fd, SIOCGIFHWADDR, (char *) &buf[intrface])))
{
puts ("HW address is:");

printf("%02x:%02x:%02x:%02x:%02x:%02x\n",
(unsigned char)buf[intrface].ifr_hwaddr.sa_data[0],
(unsigned char)buf[intrface].ifr_hwaddr.sa_data[1],
(unsigned char)buf[intrface].ifr_hwaddr.sa_data[2],
(unsigned char)buf[intrface].ifr_hwaddr.sa_data[3],
(unsigned char)buf[intrface].ifr_hwaddr.sa_data[4],
(unsigned char)buf[intrface].ifr_hwaddr.sa_data[5]);

puts("");
puts("");
}
#endif

else {
char str[256];

sprintf (str, "cpm: ioctl device %s", buf[intrface].ifr_name);
perror (str);
}
}
} else
perror ("cpm: ioctl");

} else
perror ("cpm: socket");

close(fd);
return retn;
}