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Add basic PTY support.
For now, there are four hard-coded PTYs: /dev/pt{m,s}[0123] Use this in the Terminal to open a pty pair and spawn a shell.
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21 changed files with 287 additions and 10 deletions
26
Kernel/MasterPTY.h
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26
Kernel/MasterPTY.h
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#pragma once
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#include <VirtualFileSystem/CharacterDevice.h>
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#include "DoubleBuffer.h"
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class SlavePTY;
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class MasterPTY final : public CharacterDevice {
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public:
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explicit MasterPTY(unsigned index);
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virtual ~MasterPTY() override;
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void set_slave(SlavePTY& slave) { m_slave = &slave; }
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virtual ssize_t read(byte*, size_t) override;
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virtual ssize_t write(const byte*, size_t) override;
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virtual bool has_data_available_for_reading(Process&) const override;
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virtual bool is_master_pty() const override { return true; }
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String pts_name() const;
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void on_slave_write(const byte*, size_t);
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private:
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unsigned m_index;
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SlavePTY* m_slave { nullptr };
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DoubleBuffer m_buffer;
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};
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