@b0rk we may be using different definitions of backspace here. I suspect you are talking about what is named the ERASE function in termios: undo the previously typed character on the line. I use backspace in the ASCII meaning, which is the ASCII code associated with ctrl-H. If your keyboard does not generate that ASCII code when you press ctrl-H, that's a seriously non-standard setup. This is a function of the terminal (emulator), not of the tty driver.