case 5: options.c_cflag |= CS5; break;
case 6: options.c_cflag |= CS6; break;
case 7: options.c_cflag |= CS7; break;
case 8: options.c_cflag |= CS8; break;
default: return "Invalid number of data bits (need 5, 6, 7 or 8)";
}
case 5: options.c_cflag |= CS5; break;
case 6: options.c_cflag |= CS6; break;
case 7: options.c_cflag |= CS7; break;
case 8: options.c_cflag |= CS8; break;
default: return "Invalid number of data bits (need 5, 6, 7 or 8)";
}