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113 lines
5.8 KiB
HTML
113 lines
5.8 KiB
HTML
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* @Id: curs_beep.3x,v 1.42 2025/02/01 23:46:11 tom Exp @
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
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<HTML>
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<HEAD>
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<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
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<meta name="generator" content="Manpage converted by man2html - see https://invisible-island.net/scripts/readme.html#others_scripts">
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<TITLE>curs_beep 3x 2025-02-01 ncurses 6.6 Library calls</TITLE>
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<link rel="author" href="mailto:bug-ncurses@gnu.org">
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</HEAD>
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<BODY>
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<H1 class="no-header">curs_beep 3x 2025-02-01 ncurses 6.6 Library calls</H1>
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<PRE>
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<STRONG><A HREF="curs_beep.3x.html">curs_beep(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_beep.3x.html">curs_beep(3x)</A></STRONG>
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</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
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<STRONG>beep</STRONG>, <STRONG>flash</STRONG> - ring the (visual) bell of the terminal with <EM>curses</EM>
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</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
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<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
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<STRONG>int</STRONG> <STRONG>beep(void);</STRONG>
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<STRONG>int</STRONG> <STRONG>flash(void);</STRONG>
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</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
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<STRONG>beep</STRONG> and <STRONG>flash</STRONG> alert the terminal user: the former by sounding the
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terminal's audible alarm, and the latter by visibly attracting
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attention. Commonly, a terminal implements a visual bell by
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momentarily reversing the character foreground and background colors on
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the entire display; even a monochrome device can do this. These
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functions each attempt the other alert type if the one requested is
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unavailable. If neither is available, <EM>curses</EM> performs no action.
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Nearly all terminals have an audible alert mechanism such as a bell or
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piezoelectric buzzer, but only some can flash the screen.
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</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
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These functions return <STRONG>OK</STRONG> on success and <STRONG>ERR</STRONG> on failure.
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In <EM>ncurses</EM>, <STRONG>beep</STRONG> and <STRONG>flash</STRONG> return <STRONG>OK</STRONG> if the terminal type supports the
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corresponding capability: <STRONG>bell</STRONG> (<STRONG>bel</STRONG>) for <STRONG>beep</STRONG> and <STRONG>flash_screen</STRONG> (<STRONG>flash</STRONG>)
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for <STRONG>flash</STRONG>. Otherwise they return <STRONG>ERR</STRONG>.
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</PRE><H2><a name="h2-EXTENSIONS">EXTENSIONS</a></H2><PRE>
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In <EM>ncurses</EM>, these functions can return <STRONG>ERR</STRONG>.
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</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
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X/Open Curses Issue 4 describes these functions. It specifies no error
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conditions for them.
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On SVr4 <EM>curses</EM>, they always return <EM>OK</EM>, and X/Open Curses specifies them
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as doing so.
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</PRE><H2><a name="h2-HISTORY">HISTORY</a></H2><PRE>
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SVr2 (1984) introduced <EM>beep</EM> and <EM>flash</EM>.
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</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
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<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>
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ncurses 6.6 2025-02-01 <STRONG><A HREF="curs_beep.3x.html">curs_beep(3x)</A></STRONG>
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</PRE>
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<div class="nav">
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<ul>
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<li><a href="#h2-NAME">NAME</a></li>
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<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
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<li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
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<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
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<li><a href="#h2-EXTENSIONS">EXTENSIONS</a></li>
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<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
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<li><a href="#h2-HISTORY">HISTORY</a></li>
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<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
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</ul>
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</div>
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</BODY>
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</HTML>
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