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Hi all. In some articles I have read about a "UNIX Circuit Design System", which was written originally in some version of Research UNIX by Sandy Fraser. Here is a quote from the article "A Research UNIX Reader: Annotated Excerpts from the Programmer's Manual", by Douglas McIlroy: Even...

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curs_beep

curs_beep(3CURSES)					     Curses Library Functions						curs_beep(3CURSES)

NAME

       curs_beep, beep, flash - curses bell and screen flash routines

SYNOPSIS

       cc [ flag ... ] file ... -lcurses [ library ... ]
       #include <curses.h>

       int beep(void);

       int flash(void);

DESCRIPTION

       The  beep() and flash() routines are used to signal the terminal user. The routine beep() sounds the audible alarm on the terminal, if pos-
       sible; if that is not possible, it flashes the screen (visible bell), if that is possible. The routine flash() flashes the screen,  and	if
       that  is not possible, sounds the audible signal. If neither signal is possible, nothing happens. Nearly all terminals have an audible sig-
       nal (bell or beep), but only some can flash the screen.

RETURN VALUES

       These routines always return OK.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       curses(3CURSES), attributes(5)

NOTES

       The header <curses.h> automatically includes the headers  <stdio.h> and <unctrl.h>.

SunOS 5.10							    31 Dec 1996 						curs_beep(3CURSES)