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/*
* BRLTTY - A background process providing access to the console screen (when in
* text mode) for a blind person using a refreshable braille display.
*
* Copyright (C) 1995-2025 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU Lesser General Public License, as published by the Free Software
* Foundation; either version 2.1 of the License, or (at your option) any
* later version. Please see the file LICENSE-LGPL for details.
*
* Web Page: http://brltty.app/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include <fcntl.h>
#include <sys/kbio.h>
#include <sys/kbd.h>
#include "log.h"
#include "beep.h"
static int
getKeyboard (void) {
static int keyboard = -1;
if (keyboard == -1) {
if ((keyboard = open("/dev/kbd", O_WRONLY)) != -1) {
logMessage(LOG_DEBUG, "keyboard opened: fd=%d", keyboard);
} else {
logSystemError("keyboard open");
}
}
return keyboard;
}
int
canBeep (void) {
return getKeyboard() != -1;
}
int
asynchronousBeep (BeepFrequency frequency, BeepDuration duration) {
return 0;
}
int
synchronousBeep (BeepFrequency frequency, BeepDuration duration) {
return 0;
}
int
startBeep (BeepFrequency frequency) {
int keyboard = getKeyboard();
if (keyboard != -1) {
int command = KBD_CMD_BELL;
if (ioctl(keyboard, KIOCCMD, &command) != -1) return 1;
logSystemError("ioctl KIOCCMD KBD_CMD_BELL");
}
return 0;
}
int
stopBeep (void) {
int keyboard = getKeyboard();
if (keyboard != -1) {
int command = KBD_CMD_NOBELL;
if (ioctl(keyboard, KIOCCMD, &command) != -1) return 1;
logSystemError("ioctl KIOCCMD KBD_CMD_NOBELL");
}
return 0;
}
void
endBeep (void) {
}
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