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Kernel: Create SelfTTYDevice class to help replace /dev/tty symlink

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This will replace the /dev/tty symlink created by SystemServer, so
instead of a symlink, a character device will be created. When doing
read(2), write(2) and ioctl(2) on this device, it will "redirect" these
operations to the attached TTY of the current process.
This commit is contained in:
Liav A 2022-02-15 21:24:31 +02:00 • committed by Andreas Kling
parent 2fb9eb5257
commit 12867d60ad
4 changed files with 102 additions and 0 deletions
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32
Kernel/Devices/SelfTTYDevice.h Normal file
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/*
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <Kernel/Devices/CharacterDevice.h>
namespace Kernel {
class SelfTTYDevice final : public CharacterDevice {
friend class DeviceManagement;
public:
static NonnullRefPtr<SelfTTYDevice> must_create();
virtual ~SelfTTYDevice() override;
private:
SelfTTYDevice();
// ^CharacterDevice
virtual ErrorOr<NonnullRefPtr<OpenFileDescription>> open(int options) override;
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, UserOrKernelBuffer const&, size_t) override;
virtual bool can_read(OpenFileDescription const&, u64) const override;
virtual bool can_write(OpenFileDescription const&, u64) const override;
virtual StringView class_name() const override { return "SelfTTYDevice"sv; }
};
}