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CURSES_TTY(3)			   BSD Library Functions Manual 		    CURSES_TTY(3)

NAME
     curses_tty, beep, flash, curs_set, def_prog_mode, reset_prog_mode, def_shell_mode,
     reset_shell_mode, echo, noecho, delay_output, erasechar, flushinp, gettmode, halfdelay,
     has_ic, has_il, idcok, idlok, intrflush, noqiflush, qiflush, killchar, meta, napms, nl,
     nonl, cbreak, nocbreak, raw, noraw, savetty, resetty -- curses terminal manipulation rou-
     tines

LIBRARY
     Curses Library (libcurses, -lcurses)

SYNOPSIS
     #include <curses.h>

     int
     beep(void);

     int
     flash(void);

     int
     curs_set(int visibility);

     int
     def_prog_mode(void);

     int
     reset_prog_mode(void);

     int
     def_shell_mode(void);

     int
     reset_shell_mode(void);

     int
     echo(void);

     int
     noecho(void);

     int
     delay_output(int ms);

     char
     erasechar(void);

     int
     flushinp(void);

     int
     gettmode(void);

     int
     has_ic(void);

     int
     has_il(void);

     int
     idcok(WINDOW *win, boolf flag);

     int
     idlok(WINDOW *win, boolf flag);

     int
     intrflush(WINDOW *win, boolf flag);

     void
     noqiflush(void);

     void
     qiflush(void);

     char
     killchar(void);

     int
     meta(WINDOW *win, boolf flag);

     int
     napms(int ms);

     int
     nl(void);

     int
     nonl(void);

     int
     cbreak(void);

     int
     nocbreak(void);

     int
     halfdelay(int);

     int
     raw(void);

     int
     noraw(void);

     int
     savetty(void);

     int
     resetty(void);

DESCRIPTION
     These functions manipulate curses terminal settings.

     The beep() function rings the terminal bell, if this is possible.	Failing that, the termi-
     nal screen will be flashed.  If neither of these are possible, then no action will be taken.
     flash() will flash the terminal screen if possible.  Failing that, the terminal bell will be
     rung.  If neither of these are possible then no action will be taken.

     The cursor visibility can be set by calling curs_set().  The following visibility settings
     are valid for curs_set():

	   Visibility  Effect
	   0	       cursor is invisible.
	   1	       cursor is normal visibility
	   2	       cursor is high visibility

     A successful call to curs_set() will return the previous visibility setting for the cursor.

     The delay_output() function pauses the output to the terminal by sending the appropriate
     number of terminal pad characters such that the transmission time of the pad characters will
     take ms milliseconds.

     Calling def_prog_mode() will cause the current terminal curses setting to be saved.  A sub-
     sequent call to reset_prog_mode(), will restore the saved settings.  This is useful when
     calls to external programs are made that may reset the terminal characteristics.

     The def_shell_mode() function saves the current terminal line settings.  These settings are
     the ones that will be restored when the curses application exits.	Conversely,
     reset_shell_mode() will save the current terminal curses settings for later restoration and
     restores the previously saved terminal line settings.

     The echo() function turns on curses echo mode, characters entered will be echoed to the ter-
     minal by curses.  The noecho() function disables this feature.

     The current erase character for the terminal can be determined by calling the erasechar()
     function.

     The flushinp() function discards any pending input for the current screen.

     The modes for the current terminal can be reset by calling gettmode(), this will perform the
     initialisation on the terminal that is normally done by curses at start up.

     The has_ic() function returns either TRUE or FALSE depending on whether or not the terminal
     has a insert character capability or not.	Similarly the has_il() function does the same
     test but for a insert line capability.

     The use of the insert character capability in curses operations can be enabled or disabled
     by calling idcok() on the desired window.	Similarly, the use of the insert line capability
     can be controlled using the idlok() function.

     The intrflush() function controls whether or not a flush of the input buffer is performed
     when an interrupt key (kill, suspend or quit) is pressed.	The win parameter is ignored.
     The noqiflush() function is equivalent to intrflush(stdscr, FALSE).  The qiflush() function
     is equivalent to intrflush(stdscr, TRUE).

     The character that performs the line kill function can be determined by calling the
     killchar() function.

     The meta() function turns on and off the generation of 8 bit characters by the terminal, if
     flag is FALSE then only 7 bit characters will be returned, if flag is TRUE then 8 bit char-
     acters will be returned by the terminal.

     The napms() causes the application to sleep for the number of milliseconds specified by ms.

     Calling nl() will cause curses to map all carriage returns to newlines on input, this func-
     tionality is enabled by default.  The nonl() function disables this behaviour.

     The cbreak() function will put the terminal into cbreak mode, which means that characters
     will be returned one at a time instead of waiting for a newline character, line discipline
     processing will be performed.  The nocbreak() function disables this mode.

     Calling halfdelay() puts the terminal into the same mode as cbreak() with the exception that
     if no character is received within the specified number of tenths of a second then the input
     routine will return ERR.  This mode can be cancelled by calling nocbreak().  The valid range
     for the timeout is from 1 to 255 tenths of a second.

     The noraw() function sets the input mode for the current terminal into Cooked mode, that is
     input character translation and signal character processing is performed.	The raw() func-
     tion puts the terminal into Raw mode, no input character translation is done nor is signal
     character processing.

     The terminal tty flags can be saved by calling savetty() and may be restored by calling
     resetty(), the use of these functions is discouraged as they may cause the terminal to be
     put into a state that is incompatible with curses operation.

RETURN VALUES
     Functions returning pointers will return NULL if an error is detected.  The functions that
     return an int will return one of the following values:

     OK   The function completed successfully.
     ERR  An error occurred in the function.

SEE ALSO
     getch(3), termios(4)

NOTES
     The idcok() and idlok() currently have no effect on the curses code at all, currently curses
     will always use the terminal insert character and insert line capabilities if available.

STANDARDS
     The NetBSD Curses library complies with the X/Open Curses specification, part of the Single
     Unix Specification.

HISTORY
     The Curses package appeared in 4.0BSD.

BSD					  June 13, 2003 				      BSD
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