Re: Interfacing with terminal device using termios in canonical mode.

[Gregory Nutt]

You might want to try using apps/system/readline to read lines from 
serial.  It has some tricks that make it behave a little more like 
canonical mode. 

If you something more like a Bask command line, then you might also 
consider apps/system/cle which works like readline but provides for a 
full emacs-command command line editor (CLE).