struct termios options;
openpty(&_masterfd, &_slavefd, _dev, NULL, NULL);
fcntl(_masterfd, F_SETFL, 0);
tcgetattr(_masterfd, &_savedOptions);
tcgetattr(_masterfd, &options);
cfmakeraw(&options);
options.c_cflag |= (CLOCAL | CREAD);
if (tcsetattr(_masterfd, TCSANOW, &options) != 0) {
    fprintf(stderr, "Can't set up PTYn");
}