curs_beep(3X)

✨ curs_beep — the bell one 🔔

okay so bestie, this is a page from the curses library calls manual (yes, section 3X, we're fancy 💅). Let's get into it.

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💖 NAME 💖

beep, flash — ring the (visual) bell of the terminal with curses

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🎀 SYNOPSIS 🎀

#include <curses.h>

int beep(void);
int flash(void);

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🦋 DESCRIPTION 🦋

So beep and flash are both here to alert the terminal user, they just have different love languages 💖

• beep does it by sounding the terminal's audible alarm.
• flash does it by visibly attracting attention.

Typically, a terminal pulls off a visual bell by momentarily reversing the character foreground and background colors on the entire display — and get this, even a monochrome device can do it. iconic.

Here's the cute part: these functions each attempt the other alert type if the one requested is unavailable. So they've got each other's backs 🫶. And if neither is available? curses just does nothing, no action, periodt.

Nearly all terminals have an audible alert mechanism like a bell or a piezoelectric buzzer 🔔, but only some can flash the screen. iykyk.

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🌸 RETURN VALUE 🌸

These functions return OK on success and ERR on failure.

In ncurses specifically: 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. 💀

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🌈 EXTENSIONS 🌈

In ncurses, these functions can return ERR. (yes that's the whole extension, we love a short king)

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👑 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.

so like, if you're porting and relying on ERR… bestie. different curses, different story 😭

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🧚 HISTORY 🧚

SVr2 (1984) introduced beep and flash. retro legends, honestly. ✨

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⭐ SEE ALSO ⭐

• curses(3X)
• terminfo(5)

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and that's the whole page, no notes 💜 this was ncurses 6.6, dated 2025-02-01 — mwah, slay, go ring that bell 🎀🔔