Beeping in Linux

[M***@dastardlyhq.com]

I'm looking at a way of making the machine beep without relying on having a
TTY available to send \7 to or going all heavyweight with ALSA.

I've found something online that mentioned ioctl() + the KDMTONE option but I
can't find any example code. Does anyone know how its done?

Thanks for any help

[Marcel Mueller]

Post by M***@dastardlyhq.com
I'm looking at a way of making the machine beep without relying on having a
TTY available to send \7 to or going all heavyweight with ALSA.

Many PC hardware has no embedded speaker anymore.


Marcel

[wij]

Post by M***@dastardlyhq.com
I'm looking at a way of making the machine beep without relying on having a
TTY available to send \7 to or going all heavyweight with ALSA.
I've found something online that mentioned ioctl() + the KDMTONE option but I
can't find any example code. Does anyone know how its done?
Thanks for any help

This is the beep(..) implement in libwy https://sourceforge.net/projects/cscall/files/latest/download
Root privilege is required.

/* Copyright is licensed by GNU LGPL, see file COPYING. by I.J.Wang 2018

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)!=msec)||(freq<=0)||(CLOCK_TICK_RATE/freq>0xffff)) {
WY_RETURN( EINVAL );
}
if((::ioctl(fh.fd(),KDMKTONE,( (msec<<16)|(CLOCK_TICK_RATE/freq) )))==-1) {
WY_RETURN(errno);
}
return Wy::Ok;
};

}; // end namespce Wy

#endif // end WY_IOCTL_H__

[M***@dastardlyhq.com]

On Sun, 27 Oct 2024 20:00:34 +0800

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