ladybird/Kernel/Syscalls/beep.cpp
Liav A 69f054616d Kernel: Add CommandLine option to disable or enable the PC speaker
By default, we disable the PC speaker as it's quite annoying when using
the text mode console.
2022-01-23 00:40:54 +00:00

27 lines
604 B
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/CommandLine.h>
#include <Kernel/Devices/PCSpeaker.h>
#include <Kernel/Process.h>
namespace Kernel {
ErrorOr<FlatPtr> Process::sys$beep()
{
VERIFY_NO_PROCESS_BIG_LOCK(this);
if (!kernel_command_line().is_pc_speaker_enabled())
return ENODEV;
PCSpeaker::tone_on(440);
auto result = Thread::current()->sleep(Time::from_nanoseconds(200'000'000));
PCSpeaker::tone_off();
if (result.was_interrupted())
return EINTR;
return 0;
}
}