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https://github.com/RGBCube/serenity
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105 lines
3 KiB
C++
105 lines
3 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "SlavePTY.h"
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#include "MasterPTY.h"
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#include <Kernel/FileSystem/DevPtsFS.h>
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#include <Kernel/Process.h>
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//#define SLAVEPTY_DEBUG
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namespace Kernel {
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SlavePTY::SlavePTY(MasterPTY& master, unsigned index)
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: TTY(201, index)
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, m_master(master)
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, m_index(index)
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{
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sprintf(m_tty_name, "/dev/pts/%u", m_index);
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auto process = Process::current();
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set_uid(process->uid());
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set_gid(process->gid());
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DevPtsFS::register_slave_pty(*this);
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set_size(80, 25);
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}
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SlavePTY::~SlavePTY()
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{
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#ifdef SLAVEPTY_DEBUG
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dbg() << "~SlavePTY(" << m_index << ")";
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#endif
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DevPtsFS::unregister_slave_pty(*this);
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}
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StringView SlavePTY::tty_name() const
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{
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return m_tty_name;
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}
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void SlavePTY::echo(u8 ch)
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{
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if (should_echo_input()) {
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m_master->on_slave_write(&ch, 1);
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}
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}
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void SlavePTY::on_master_write(const u8* buffer, ssize_t size)
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{
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for (ssize_t i = 0; i < size; ++i)
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emit(buffer[i]);
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}
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ssize_t SlavePTY::on_tty_write(const u8* data, ssize_t size)
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{
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return m_master->on_slave_write(data, size);
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}
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bool SlavePTY::can_write(const FileDescription&, size_t) const
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{
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return m_master->can_write_from_slave();
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}
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bool SlavePTY::can_read(const FileDescription& description, size_t offset) const
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{
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if (m_master->is_closed())
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return true;
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return TTY::can_read(description, offset);
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}
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ssize_t SlavePTY::read(FileDescription& description, size_t offset, u8* buffer, ssize_t size)
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{
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if (m_master->is_closed())
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return 0;
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return TTY::read(description, offset, buffer, size);
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}
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KResult SlavePTY::close()
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{
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m_master->notify_slave_closed({});
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return KSuccess;
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}
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}
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