if (ioctl(s, SIOCSIFNAME, &ifr) < 0) {
syslog(LOG_NOTICE, "netdevice %s rename to %s failed\n", buf, name);
perror("ioctl SIOCSIFNAME rename");
if (ioctl(s, SIOCSIFNAME, &ifr) < 0) {
syslog(LOG_NOTICE, "netdevice %s rename to %s failed\n", buf, name);
perror("ioctl SIOCSIFNAME rename");