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Code Issues Projects Releases Packages Wiki Activity Actions 9

Kernel: Make /proc/PID/fds display something useful for character devices.

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This commit is contained in:
Andreas Kling 2019-01-21 02:33:01 +01:00
parent 786b903d62
commit e6fc84e234
Notes: sideshowbarker 2024-07-19 15:59:33 +09:00
14 changed files with 46 additions and 6 deletions
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2
Kernel/Console.h
View file

@ -18,10 +18,12 @@ public:
Console();
virtual ~Console() override;
// ^CharacterDevice
virtual bool can_read(Process&) const override;
virtual bool can_write(Process&) const override { return true; }
virtual ssize_t read(Process&, byte* buffer, size_t size) override;
virtual ssize_t write(Process&, const byte* data, size_t size) override;
virtual const char* class_name() const override { return "Console"; }
void setImplementation(ConsoleImplementation* implementation) { m_implementation = implementation; }

1
Kernel/GUIEventDevice.h
View file

@ -13,4 +13,5 @@ private:
virtual ssize_t write(Process&, const byte* buffer, size_t bufferSize) override;
virtual bool can_read(Process&) const override;
virtual bool can_write(Process&) const override { return true; }
virtual const char* class_name() const override { return "GUIEventDevice"; }
};

3
Kernel/Keyboard.h
View file

@ -42,6 +42,9 @@ private:
// ^IRQHandler
virtual void handle_irq() override;
// ^CharacterDevice
virtual const char* class_name() const override { return "Keyboard"; }
void emit(byte);
KeyboardClient* m_client { nullptr };

4
Kernel/MasterPTY.h
View file

@ -10,6 +10,7 @@ public:
explicit MasterPTY(unsigned index);
virtual ~MasterPTY() override;
// ^CharacterDevice
virtual ssize_t read(Process&, byte*, size_t) override;
virtual ssize_t write(Process&, const byte*, size_t) override;
virtual bool can_read(Process&) const override;
@ -21,6 +22,9 @@ public:
void on_slave_write(const byte*, size_t);
private:
// ^CharacterDevice
virtual const char* class_name() const override { return "MasterPTY"; }
SlavePTY& m_slave;
unsigned m_index;
DoubleBuffer m_buffer;

3
Kernel/PS2MouseDevice.h
View file

@ -20,6 +20,9 @@ private:
// ^IRQHandler
virtual void handle_irq() override;
// ^CharacterDevice
virtual const char* class_name() const override { return "PS2MouseDevice"; }
void initialize();
void prepare_for_input();
void prepare_for_output();

3
Kernel/PTYMultiplexer.h
View file

@ -19,6 +19,9 @@ public:
virtual bool can_write(Process&) const override { return true; }
private:
// ^CharacterDevice
virtual const char* class_name() const override { return "PTYMultiplexer"; }
Lock m_lock;
Vector<RetainPtr<MasterPTY>> m_freelist;
};

14
Kernel/SlavePTY.h
View file

@ -8,16 +8,18 @@ class SlavePTY final : public TTY {
public:
virtual ~SlavePTY() override;
virtual String tty_name() const override;
void on_master_write(const byte*, size_t);
unsigned index() const { return m_index; }
protected:
virtual void on_tty_write(const byte*, size_t) override;
virtual bool can_write(Process&) const override;
private:
// ^TTY
virtual String tty_name() const override;
virtual void on_tty_write(const byte*, size_t) override;
// ^CharacterDevice
virtual bool can_write(Process&) const override;
virtual const char* class_name() const override { return "SlavePTY"; }
friend class MasterPTY;
SlavePTY(MasterPTY&, unsigned index);

3
Kernel/VirtualConsole.h
View file

@ -26,6 +26,9 @@ private:
virtual void on_tty_write(const byte*, size_t) override;
virtual String tty_name() const override;
// ^CharacterDevice
virtual const char* class_name() const override { return "VirtualConsole"; }
void set_active(bool);
void on_char(byte);

2
VirtualFileSystem/CharacterDevice.h
View file

@ -29,6 +29,8 @@ public:
virtual int ioctl(Process&, unsigned request, unsigned arg);
virtual const char* class_name() const = 0;
protected:
CharacterDevice(unsigned major, unsigned minor) : m_major(major), m_minor(minor) { }

5
VirtualFileSystem/FileDescriptor.cpp
View file

@ -297,6 +297,11 @@ String FileDescriptor::absolute_path()
ksprintf(buf, "fifo:%x", m_fifo.ptr());
return buf;
}
if (is_character_device()) {
char buf[128];
ksprintf(buf, "device:%u,%u (%s)", m_device->major(), m_device->minor(), m_device->class_name());
return buf;
}
ASSERT(m_inode);
return VFS::the().absolute_path(*m_inode);
}

3
VirtualFileSystem/FullDevice.h
View file

@ -8,9 +8,12 @@ public:
FullDevice();
virtual ~FullDevice() override;
private:
// ^CharacterDevice
virtual ssize_t read(Process&, byte* buffer, size_t bufferSize) override;
virtual ssize_t write(Process&, const byte* buffer, size_t bufferSize) override;
virtual bool can_read(Process&) const override;
virtual bool can_write(Process&) const override { return true; }
virtual const char* class_name() const override { return "FullDevice"; }
};

3
VirtualFileSystem/NullDevice.h
View file

@ -8,9 +8,12 @@ public:
NullDevice();
virtual ~NullDevice() override;
private:
// ^CharacterDevice
virtual ssize_t read(Process&, byte* buffer, size_t bufferSize) override;
virtual ssize_t write(Process&, const byte* buffer, size_t bufferSize) override;
virtual bool can_write(Process&) const override { return true; }
virtual bool can_read(Process&) const override;
virtual const char* class_name() const override { return "CharacterDevice"; }
};

3
VirtualFileSystem/RandomDevice.h
View file

@ -8,9 +8,12 @@ public:
RandomDevice();
virtual ~RandomDevice() override;
private:
// ^CharacterDevice
virtual ssize_t read(Process&, byte* buffer, size_t bufferSize) override;
virtual ssize_t write(Process&, const byte* buffer, size_t bufferSize) override;
virtual bool can_read(Process&) const override;
virtual bool can_write(Process&) const override { return true; }
virtual const char* class_name() const override { return "RandomDevice"; }
};

3
VirtualFileSystem/ZeroDevice.h
View file

@ -8,9 +8,12 @@ public:
ZeroDevice();
virtual ~ZeroDevice() override;
private:
// ^CharacterDevice
virtual ssize_t read(Process&, byte* buffer, size_t bufferSize) override;
virtual ssize_t write(Process&, const byte* buffer, size_t bufferSize) override;
virtual bool can_read(Process&) const override;
virtual bool can_write(Process&) const override { return true; }
virtual const char* class_name() const override { return "ZeroDevice"; }
};