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https://github.com/RGBCube/serenity
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7053d7ece3
Contrary to the past, we don't attempt to assume the real name of a TTY device, but instead, we generate a pseudo name only when needed to do so which is still OK because we don't break abstraction layer rules and we still can provide userspace with the required information.
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <Kernel/FileSystem/InodeIdentifier.h>
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#include <Kernel/TTY/TTY.h>
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namespace Kernel {
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class MasterPTY;
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class SlavePTY final : public TTY {
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public:
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virtual bool unref() const override;
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virtual ~SlavePTY() override;
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void on_master_write(const UserOrKernelBuffer&, size_t);
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unsigned index() const { return m_index; }
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time_t time_of_last_write() const { return m_time_of_last_write; }
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virtual FileBlockerSet& blocker_set() override;
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private:
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// ^TTY
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virtual ErrorOr<NonnullOwnPtr<KString>> pseudo_name() const override;
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virtual ErrorOr<size_t> on_tty_write(const UserOrKernelBuffer&, size_t) override;
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virtual void echo(u8) override;
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// ^CharacterDevice
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virtual bool can_read(const OpenFileDescription&, u64) const override;
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virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
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virtual bool can_write(const OpenFileDescription&, u64) const override;
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virtual StringView class_name() const override { return "SlavePTY"sv; }
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virtual ErrorOr<void> close() override;
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friend class MasterPTY;
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SlavePTY(MasterPTY&, unsigned index);
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RefPtr<MasterPTY> m_master;
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time_t m_time_of_last_write { 0 };
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unsigned m_index { 0 };
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mutable IntrusiveListNode<SlavePTY> m_list_node;
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public:
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using List = IntrusiveList<&SlavePTY::m_list_node>;
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static SpinlockProtected<SlavePTY::List>& all_instances();
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};
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}
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