mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 18:22:45 +00:00
18e77aa285
This method will be used later in DevFS, to set the appropriate permissions for each device node.
110 lines
3.9 KiB
C++
110 lines
3.9 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/CircularDeque.h>
|
|
#include <AK/WeakPtr.h>
|
|
#include <Kernel/Devices/CharacterDevice.h>
|
|
#include <Kernel/DoubleBuffer.h>
|
|
#include <Kernel/ProcessGroup.h>
|
|
#include <Kernel/UnixTypes.h>
|
|
|
|
namespace Kernel {
|
|
|
|
class TTY : public CharacterDevice {
|
|
public:
|
|
virtual ~TTY() override;
|
|
|
|
virtual KResultOr<size_t> read(FileDescription&, size_t, UserOrKernelBuffer&, size_t) override;
|
|
virtual KResultOr<size_t> write(FileDescription&, size_t, const UserOrKernelBuffer&, size_t) override;
|
|
virtual bool can_read(const FileDescription&, size_t) const override;
|
|
virtual bool can_write(const FileDescription&, size_t) const override;
|
|
virtual int ioctl(FileDescription&, unsigned request, FlatPtr arg) override final;
|
|
virtual String absolute_path(const FileDescription&) const override { return tty_name(); }
|
|
|
|
virtual String tty_name() const = 0;
|
|
|
|
unsigned short rows() const { return m_rows; }
|
|
unsigned short columns() const { return m_columns; }
|
|
|
|
ProcessGroupID pgid() const
|
|
{
|
|
if (auto pg = m_pg.strong_ref())
|
|
return pg->pgid();
|
|
return 0;
|
|
}
|
|
|
|
void set_termios(const termios&);
|
|
bool should_generate_signals() const { return m_termios.c_lflag & ISIG; }
|
|
bool should_flush_on_signal() const { return !(m_termios.c_lflag & NOFLSH); }
|
|
bool should_echo_input() const { return m_termios.c_lflag & ECHO; }
|
|
bool in_canonical_mode() const { return m_termios.c_lflag & ICANON; }
|
|
|
|
void set_default_termios();
|
|
void hang_up();
|
|
|
|
// ^Device
|
|
virtual mode_t required_mode() const override { return 0620; }
|
|
|
|
protected:
|
|
virtual ssize_t on_tty_write(const UserOrKernelBuffer&, ssize_t) = 0;
|
|
void set_size(unsigned short columns, unsigned short rows);
|
|
|
|
TTY(unsigned major, unsigned minor);
|
|
void emit(u8, bool do_evaluate_block_conditions = false);
|
|
virtual void echo(u8) = 0;
|
|
|
|
bool can_do_backspace() const;
|
|
void do_backspace();
|
|
void erase_word();
|
|
void erase_character();
|
|
void kill_line();
|
|
void flush_input();
|
|
|
|
bool is_eol(u8) const;
|
|
bool is_eof(u8) const;
|
|
bool is_kill(u8) const;
|
|
bool is_erase(u8) const;
|
|
bool is_werase(u8) const;
|
|
|
|
void generate_signal(int signal);
|
|
|
|
int m_available_lines { 0 };
|
|
|
|
private:
|
|
// ^CharacterDevice
|
|
virtual bool is_tty() const final override { return true; }
|
|
|
|
CircularDeque<u8, 1024> m_input_buffer;
|
|
WeakPtr<Process> m_original_process_parent;
|
|
WeakPtr<ProcessGroup> m_pg;
|
|
termios m_termios;
|
|
unsigned short m_rows { 0 };
|
|
unsigned short m_columns { 0 };
|
|
};
|
|
|
|
}
|