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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <Kernel/FileSystem/InodeIdentifier.h>
#include <Kernel/TTY/TTY.h>
namespace Kernel {
class MasterPTY;
class SlavePTY final : public TTY {
public:
virtual bool unref() const override;
virtual ~SlavePTY() override;
void on_master_write(UserOrKernelBuffer const&, size_t);
unsigned index() const { return m_index; }
UnixDateTime time_of_last_write() const { return m_time_of_last_write; }
virtual FileBlockerSet& blocker_set() override;
private:
// ^Device
virtual bool is_openable_by_jailed_processes() const override { return true; }
// ^TTY
virtual ErrorOr<NonnullOwnPtr<KString>> pseudo_name() const override;
virtual ErrorOr<size_t> on_tty_write(UserOrKernelBuffer const&, size_t) override;
virtual void echo(u8) override;
// ^CharacterDevice
virtual bool can_read(OpenFileDescription const&, u64) const override;
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual bool can_write(OpenFileDescription const&, u64) const override;
virtual StringView class_name() const override { return "SlavePTY"sv; }
virtual ErrorOr<void> close() override;
friend class MasterPTY;
SlavePTY(NonnullRefPtr<MasterPTY>, unsigned index);
NonnullRefPtr<MasterPTY> const m_master;
UnixDateTime m_time_of_last_write {};
unsigned m_index { 0 };
mutable IntrusiveListNode<SlavePTY> m_list_node;
public:
using List = IntrusiveList<&SlavePTY::m_list_node>;
static SpinlockProtected<SlavePTY::List, LockRank::None>& all_instances();
};
}
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