Search notes:
drivers/tty/tty_io.c
Session management: Direct the keyboard input to the correct application.
This source gives an »orthogonal feeling« to
tty's regardless if they are consoles or rs-channels.
Echoing and cooked mode is also implemented.
tty_read()
The read method for tty device files: it perofrms the read system call function on the associated terminal device.
tty_write()
Write dagta to a tty via the line discipline.