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From: Muttley@dastardlyhq.com
Newsgroups: comp.unix.programmer
Subject: Re: Beeping in Linux
Date: Sun, 27 Oct 2024 16:32:33 -0000 (UTC)
Organization: A noiseless patient Spider
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On Sun, 27 Oct 2024 20:00:34 +0800
wij <wyniijj5@gmail.com> wrote:
>On Sun, 2024-10-27 at 08:21 +0000, Muttley@dastardlyhq.com wrote:
>> I'm looking at a way of making the machine beep without relying on having=
> a=20
>> TTY available to send \7 to or going all heavyweight with ALSA.=20
>>=20
>> I've found something online that mentioned ioctl() + the KDMTONE option b=
>ut I=20
>> can't find any example code. Does anyone know how its done?
>>=20
>> Thanks for any help
>>=20
>
>This is the beep(..) implement in libwy https://sourceforge.net/projects/cs=
>call/files/latest/download
>Root privilege is required.
>
>/* Copyright is licensed by GNU LGPL, see file COPYING.       by I.J.Wang 2=
>018
>=20
>   This file is header only
>*/
>#ifndef WY_IOCTL_H__
>#define WY_IOCTL_H__
>#define WY_IOCTL_VERSION 69
>
>#include <sys/ioctl.h>
>#include <linux/kd.h>
>
>#ifndef CLOCK_TICK_RATE
>#define CLOCK_TICK_RATE 1193180
>#endif
>
>namespace Wy {
>
>inline
>Wy::Errno beep(Wy::FileHandle fh, unsigned int freq, unsigned int msec)
>{
> Wy::Errno r;
> if(((msec&0xffff)!=3Dmsec)||(freq<=3D0)||(CLOCK_TICK_RATE/freq>0xffff)) {
>   WY_RETURN( EINVAL );
> }
> if((::ioctl(fh.fd(),KDMKTONE,( (msec<<16)|(CLOCK_TICK_RATE/freq) )))=3D=3D=
>-1) {
>   WY_RETURN(errno);
> }
> return Wy::Ok;
>};
>
>}; // end namespce Wy
>
>#endif // end WY_IOCTL_H__

Thanks