In the previous part if ”Linux terminal magick” we show how to let use user use ^C and ^\ in the terminal, that was the last part of creating a graphical terminal user interface. The parts are [almost] not ordered!
For this part we add two more functions:
* Sets the the value of the ECHO flag; iff on the input to the terminal will be echoed back while typing.
* This can be used to hide what the user is type, for example when a password is requested.