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<H1 class="no-header">curs_beep 3x 2025-02-01 ncurses 6.6 Library calls</H1>
<PRE>
<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>
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
<STRONG>beep</STRONG>, <STRONG>flash</STRONG> - ring the (visual) bell of the terminal with <EM>curses</EM>
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
<STRONG>int</STRONG> <STRONG>beep(void);</STRONG>
<STRONG>int</STRONG> <STRONG>flash(void);</STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
<STRONG>beep</STRONG> and <STRONG>flash</STRONG> alert the terminal user: the former by sounding the
terminal's audible alarm, and the latter by visibly attracting
attention. Commonly, a terminal implements a visual bell by
momentarily reversing the character foreground and background colors on
the entire display; even a monochrome device can do this. These
functions each attempt the other alert type if the one requested is
unavailable. If neither is available, <EM>curses</EM> performs no action.
Nearly all terminals have an audible alert mechanism such as a bell or
piezoelectric buzzer, but only some can flash the screen.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
These functions return <STRONG>OK</STRONG> on success and <STRONG>ERR</STRONG> on failure.
In <EM>ncurses</EM>, <STRONG>beep</STRONG> and <STRONG>flash</STRONG> return <STRONG>OK</STRONG> if the terminal type supports the
corresponding capability: <STRONG>bell</STRONG> (<STRONG>bel</STRONG>) for <STRONG>beep</STRONG> and <STRONG>flash_screen</STRONG> (<STRONG>flash</STRONG>)
for <STRONG>flash</STRONG>. Otherwise they return <STRONG>ERR</STRONG>.
</PRE><H2><a name="h2-EXTENSIONS">EXTENSIONS</a></H2><PRE>
In <EM>ncurses</EM>, these functions can return <STRONG>ERR</STRONG>.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
X/Open Curses Issue 4 describes these functions. It specifies no error
conditions for them.
On SVr4 <EM>curses</EM>, they always return <EM>OK</EM>, and X/Open Curses specifies them
as doing so.
</PRE><H2><a name="h2-HISTORY">HISTORY</a></H2><PRE>
SVr2 (1984) introduced <EM>beep</EM> and <EM>flash</EM>.
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="terminfo.5.html">terminfo(5)</A></STRONG>
ncurses 6.6 2025-02-01 <STRONG><A HREF="curs_beep.3x.html">curs_beep(3x)</A></STRONG>
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<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
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<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
<li><a href="#h2-EXTENSIONS">EXTENSIONS</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
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