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beda478821
Dealing with the unsigned overflow propagation here just seems unreasonably error prone. Let's limit ourselves to 2GB buffer sizes instead.
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
#pragma once
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#include "DoubleBuffer.h"
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#include <Kernel/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(Process&, byte*, ssize_t) override;
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virtual ssize_t write(Process&, const byte*, ssize_t) override;
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virtual bool can_read(Process&) const override;
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virtual bool can_write(Process&) const override;
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virtual int ioctl(Process&, unsigned request, unsigned arg) override final;
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virtual String 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 byte*, 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(byte);
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void generate_signal(int signal);
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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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DoubleBuffer m_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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