mirror of
https://github.com/RGBCube/serenity
synced 2025-07-07 11:57:35 +00:00
4c35c8d7fd
The TTY driver now respects the ICANON flag, enabling basic line editing like VKILL, VERASE, VEOF and VWERASE. Additionally, ICANON is now set by default. Basic echoing has can now be enabled via the ECHO flag, though more complicated echoing like ECHOCTL or ECHONL has not been implemented.
69 lines
2 KiB
C++
69 lines
2 KiB
C++
#pragma once
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#include "DoubleBuffer.h"
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#include <AK/CircularDeque.h>
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#include <Kernel/Devices/CharacterDevice.h>
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#include <Kernel/UnixTypes.h>
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class Process;
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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 ssize_t read(FileDescription&, u8*, ssize_t) override;
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virtual ssize_t write(FileDescription&, const u8*, ssize_t) override;
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virtual bool can_read(FileDescription&) const override;
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virtual bool can_write(FileDescription&) const override;
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virtual int ioctl(FileDescription&, unsigned request, unsigned arg) override final;
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virtual String absolute_path(const FileDescription&) const override { return tty_name(); }
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virtual StringView tty_name() const = 0;
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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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void set_pgid(pid_t pgid) { m_pgid = pgid; }
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pid_t pgid() const { return m_pgid; }
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void set_termios(const termios&);
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bool should_generate_signals() const { return m_termios.c_lflag & ISIG; }
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bool should_echo_input() const { return m_termios.c_lflag & ECHO; }
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bool in_canonical_mode() const { return m_termios.c_lflag & 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 ssize_t on_tty_write(const u8*, ssize_t) = 0;
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void set_size(unsigned short columns, unsigned short rows);
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TTY(unsigned major, unsigned minor);
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void emit(u8);
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virtual void echo(u8) = 0;
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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 kill_line();
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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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CircularDeque<u8, 1024> m_input_buffer;
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pid_t m_pgid { 0 };
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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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