521 {

   521 {

   522     ec_ioctl_slave_state_t data;

   522     ec_ioctl_slave_state_t data;

   523 

   523 

   524     data.slave_position = slavePosition;

   524     data.slave_position = slavePosition;

   525     data.al_state = state;

   525     data.al_state = state;

   527     if (ioctl(fd, EC_IOCTL_SLAVE_STATE, &data)) {

   527     if (ioctl(fd, EC_IOCTL_SLAVE_STATE, &data)) {

   528         stringstream err;

   528         stringstream err;

   529         err << "Failed to request slave state: ";

   529         err << "Failed to request slave state: ";

   530         if (errno == EINVAL)

   530         if (errno == EINVAL)

   531             err << "Slave " << slavePosition << " does not exist!";

   531             err << "Slave " << slavePosition << " does not exist!";