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18e77aa285
This method will be used later in DevFS, to set the appropriate permissions for each device node.
70 lines
2.6 KiB
C++
70 lines
2.6 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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#pragma once
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#include <AK/Badge.h>
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#include <Kernel/Devices/CharacterDevice.h>
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#include <Kernel/Lock.h>
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namespace Kernel {
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class MasterPTY;
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class PTYMultiplexer final : public CharacterDevice {
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AK_MAKE_ETERNAL
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public:
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PTYMultiplexer();
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virtual ~PTYMultiplexer() override;
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static void initialize()
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{
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the();
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}
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static PTYMultiplexer& the();
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// ^CharacterDevice
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virtual KResultOr<NonnullRefPtr<FileDescription>> open(int options) override;
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virtual KResultOr<size_t> read(FileDescription&, size_t, UserOrKernelBuffer&, size_t) override { return 0; }
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virtual KResultOr<size_t> write(FileDescription&, size_t, const UserOrKernelBuffer&, size_t) override { return 0; }
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virtual bool can_read(const FileDescription&, size_t) const override { return true; }
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virtual bool can_write(const FileDescription&, size_t) const override { return true; }
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void notify_master_destroyed(Badge<MasterPTY>, unsigned index);
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// ^Device
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virtual mode_t required_mode() const override { return 0666; }
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private:
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// ^CharacterDevice
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virtual const char* class_name() const override { return "PTYMultiplexer"; }
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Lock m_lock { "PTYMultiplexer" };
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Vector<unsigned> m_freelist;
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};
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}
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