Setting VMIN on a non-cooked port has no effect

[rkuris]

You must be in non-canonical mode and without setting O_NONBLOCK.

References:

• https://stackoverflow.com/questions/20154157/termios-vmin-vtime-and-blocking-non-blocking-read-operations
• http://unixwiz.net/techtips/termios-vmin-vtime.html