raw, noraw - enable/disable raw mode
The routine sets the terminal into RAW mode. RAW mode is similar to
CBREAK mode, in that characters are immediately passed through to the
user program as they are typed. In RAW mode, the interrupt, quit, sus‐
pend and flow control characters are passed through uninterpreted, and
do not generate a signal.
The behavior of the BREAK key depends on the settings of bits that are
not controlled by
The routine disables RAW mode.
The and functions return OK on success and ERR on error.