Cfgetispeed returns the input baud rate stored in the termios structure.

Cfgetospeed returns the output baud rate stored in the termios structure.

Cfmakecbreak modifies attr for cbreak mode.

Cfmakeraw modifies attr for raw mode.

Pty returns a UNIX 98 pseudoterminal device.

Tcdrain waits until all output written to the object referred to by fd has been transmitted.

Tcflush discards data written to the object referred to by fd but not transmitted, or data received but not read, depending on the value of selector.

Tcgetattr gets the current serial port settings.

Tcsendbreak transmits a continuous stream of zero-valued bits for a specific duration, if the terminal is using asynchronous serial data transmission.

Tcsetattr sets the current serial port settings.

Tiocgwinsz return the width and height of the screen.

Tiocinq returns the number of bytes in the input buffer.

Tiocmbic clears the indicated modem bits.

Tiocmbis sets the indicated modem bits.

Tiocmget returns the state of the MODEM bits.

Tiocmset sets the state of the MODEM bits.

Tiocoutq return the number of bytes in the output buffer.