TTY
- http://www.linusakesson.net/programming/tty/index.php
- http://blog.eduardofleury.com/archives/2007/11/16/
- http://vmlinux.org/jocke/editor/txt/termios-faq_4.html
- http://blog.nelhage.com/archives/27
- http://www.captain.at/howto-simple-serial-port-test-example.php
- http://unixwiz.net/techtips/termios-vmin-vtime.html