8.8.1 Input Options

• int keypad(win, bf)  
  If TRUE, it enables the keypad on the keyboard of the user's terminal when waiting for input. Ncurses will then return a key code defined in .h as KEY_* for the function and arrow keys on the keypad. This is very useful for a PC keyboard because you can enable the numerical block and the cursor keys.

• int meta(win, bf)  
  If TRUE, the key codes returned from getch() are 8-bit-clean (the highest bit will not be stripped).
• int cbreak()  
  int nocbreak()  
  int crmode()  
  int nocrmode()  
  cbreak() and nocbreak() will turn the terminal CBREAK mode on or off. When CBREAK is on, input from a read will be immediately available to the program, when off the input will be buffered until newline occurs. (Note: crmode() and nocrmode() are for upward compatibility, don't use them.)
• int raw()  
  int noraw()  
  Turn RAW mode on or off. RAW is the same as CBREAK, except that in RAW mode no special character processing will be done.
• int echo()  
  int noecho()  
  Set echo() to echo input typed by the user and noecho() to be silent about it.
• int halfdelay(t)  
  As cbreak() with a delay of t seconds.
• int nodelay(win, bf)  
  Terminal will be set to no blocking mode. cetch() will return ERR if no input is ready. If set to FALSE, getch() will wait until a key is pressed.
• int timeout(t)  
  int wtimeout(win, t)  
  It is recommended to use these functions instead of halfdelay(t) and nodelay(win,bf). The result of getch() depends on the value of t. If t is positive, the read is blocked for t milliseconds, if t is zero, no blocking is done, and when t is negative the program blocks until input is available.
• int notimeout(win, bf)  
  If bf is TRUE, getch() will use a special timer (of one second length) to interpret and input sequence beginning with keys as ESCAPE etc.
• int typeahead(fd)  
  If fd is -1 no typeahead check will be done, else ncurses will use the file descriptor fd instead of for these checks.
• int intrflush(win, bf)  
  When enabled with bf TRUE an interrupt key pressed on the terminal (quit, break ...) will flush all output in the tty driver queue.
• void noqiflush()  
  void qiflush()  
  (Note: not implemented yet.)