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https://github.com/SerenityOS/serenity
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b55199c227
The TTY subsystem is represented with unix devices, so it should be under the Devices directory like the Audio, Storage, GPU and HID subsystems.
65 lines
1.8 KiB
C++
65 lines
1.8 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/Devices/TTY/TTY.h>
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#include <Kernel/FileSystem/InodeIdentifier.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(UserOrKernelBuffer const&, size_t);
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unsigned index() const { return m_index; }
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UnixDateTime time_of_last_write() const { return m_time_of_last_write; }
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virtual FileBlockerSet& blocker_set() override;
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UserID uid() const { return m_uid; }
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GroupID gid() const { return m_gid; }
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private:
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// ^Device
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virtual bool is_openable_by_jailed_processes() const override { return true; }
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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(UserOrKernelBuffer const&, 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(OpenFileDescription const&, 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(OpenFileDescription const&, 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(NonnullRefPtr<MasterPTY>, UserID, GroupID, unsigned index);
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NonnullRefPtr<MasterPTY> const m_master;
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UnixDateTime m_time_of_last_write {};
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unsigned m_index { 0 };
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UserID const m_uid { 0 };
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GroupID const m_gid { 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, LockRank::None>& all_instances();
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};
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}
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