SIOCGIFGROUP
if (ioctl(sock, SIOCGIFGROUP, &ifgr) == -1) {
if (ioctl(sock, SIOCGIFGROUP, &ifgr) == -1)
if (ioctl(s, SIOCGIFGROUP, &ifgr) == -1)
if (ioctl(s, SIOCGIFGROUP, &ifgr) == -1) {
case SIOCGIFGROUP: