update_sensor_sysctl
update_sensor_sysctl(sensor->desc, &len, idx, "%desc");
update_sensor_sysctl(sensor->location, &len, idx, "%location");
update_sensor_sysctl(sensor->pnpinfo, &len, idx, "%pnpinfo");
update_sensor_sysctl(sensor->parent, &len, idx, "%parent");
if (update_sensor_sysctl(&temp, &len, idx, "temperature") != 0)