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curs_beep
Section: Library calls (3X) Updated: 202-0-01 Index
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NAME
beep,
flash -
ring the (visual) bell of the terminal with curses
SYNOPSIS
#include <curses.h>
int beep(void);
int flash(void);
DESCRIPTION
beep
and
flash
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,
curses
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.
RETURN VALUE
These functions return
OK
on success and
ERR
on failure.
In
ncurses,
beep
and
flash
return
OK
if the terminal type supports the corresponding capability:
bell
(bel)
for
beep
and
flash_screen
(flash)
for
flash.
Otherwise they return
ERR.
EXTENSIONS
In
ncurses,
these functions can return
ERR.
PORTABILITY
X/Open Curses Issue 4 describes these functions.
It specifies no error conditions for them.
On SVr4
curses,
they always return
OK,
and X/Open Curses specifies them as doing so.
HISTORY
SVr2 (1984)
introduced
beep
and
flash.
SEE ALSO
curses(3X),
terminfo(5)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- EXTENSIONS
-
- PORTABILITY
-
- HISTORY
-
- SEE ALSO
-
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