mirror of
https://github.com/RGBCube/serenity
synced 2025-07-06 17:27:35 +00:00
b5ef900ccd
The obsolete ttyname and ptsname syscalls are removed. LibC doesn't rely on these anymore, and it helps simplifying the Kernel in many places, so it's an overall an improvement. In addition to that, /proc/PID/tty node is removed too as it is not needed anymore by userspace to get the attached TTY of a process, as /dev/tty (which is already a character device) represents that as well.
94 lines
2.8 KiB
C++
94 lines
2.8 KiB
C++
/*
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* Copyright (c) 2018-2020, 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 <AK/CircularDeque.h>
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#include <AK/WeakPtr.h>
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#include <Kernel/Devices/CharacterDevice.h>
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#include <Kernel/DoubleBuffer.h>
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#include <Kernel/ProcessGroup.h>
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#include <Kernel/UnixTypes.h>
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#define TTY_BUFFER_SIZE 1024
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namespace Kernel {
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class TTY : public CharacterDevice {
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public:
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virtual ~TTY() override;
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virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
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virtual ErrorOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
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virtual bool can_read(const OpenFileDescription&, u64) const override;
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virtual bool can_write(const OpenFileDescription&, u64) const override;
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virtual ErrorOr<void> ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override final;
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unsigned short rows() const { return m_rows; }
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unsigned short columns() const { return m_columns; }
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ProcessGroupID pgid() const
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{
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if (auto pg = m_pg.strong_ref())
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return pg->pgid();
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return 0;
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}
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ErrorOr<void> set_termios(const termios&);
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bool should_generate_signals() const { return (m_termios.c_lflag & ISIG) == ISIG; }
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bool should_flush_on_signal() const { return (m_termios.c_lflag & NOFLSH) != NOFLSH; }
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bool should_echo_input() const { return (m_termios.c_lflag & ECHO) == ECHO; }
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bool in_canonical_mode() const { return (m_termios.c_lflag & ICANON) == ICANON; }
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void set_default_termios();
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void hang_up();
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protected:
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virtual ErrorOr<size_t> on_tty_write(const UserOrKernelBuffer&, size_t) = 0;
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void set_size(unsigned short columns, unsigned short rows);
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TTY(MajorNumber major, MinorNumber minor);
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void emit(u8, bool do_evaluate_block_conditions = false);
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void echo_with_processing(u8);
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bool can_do_backspace() const;
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void do_backspace();
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void erase_word();
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void erase_character();
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void kill_line();
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void flush_input();
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bool is_eol(u8) const;
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bool is_eof(u8) const;
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bool is_kill(u8) const;
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bool is_erase(u8) const;
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bool is_werase(u8) const;
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void generate_signal(int signal);
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int m_available_lines { 0 };
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private:
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// ^CharacterDevice
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virtual bool is_tty() const final override { return true; }
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virtual void echo(u8) = 0;
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template<typename Functor>
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void process_output(u8, Functor put_char);
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CircularDeque<u8, TTY_BUFFER_SIZE> m_input_buffer;
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// FIXME: use something like AK::Bitmap but which takes a size template parameter
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u8 m_special_character_bitmask[TTY_BUFFER_SIZE / 8];
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WeakPtr<Process> m_original_process_parent;
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WeakPtr<ProcessGroup> m_pg;
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termios m_termios;
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unsigned short m_rows { 0 };
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unsigned short m_columns { 0 };
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};
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}
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