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Kernel: Have File virtuals take a FileDescriptor& rather than a Process&.

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This will allow us to implement different behaviors depending on the role
of the descriptor a File is being accessed through.
This commit is contained in:
Andreas Kling 2019-04-29 13:58:40 +02:00
parent 3761bc3ed7
commit 8cbb7f101f
39 changed files with 156 additions and 155 deletions
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12
Kernel/TTY/MasterPTY.cpp
View file

@ -31,14 +31,14 @@ String MasterPTY::pts_name() const
return m_pts_name;
}
ssize_t MasterPTY::read(Process&, byte* buffer, ssize_t size)
ssize_t MasterPTY::read(FileDescriptor&, byte* buffer, ssize_t size)
{
if (!m_slave && m_buffer.is_empty())
return 0;
return m_buffer.read(buffer, size);
}
ssize_t MasterPTY::write(Process&, const byte* buffer, ssize_t size)
ssize_t MasterPTY::write(FileDescriptor&, const byte* buffer, ssize_t size)
{
if (!m_slave)
return -EIO;
@ -46,14 +46,14 @@ ssize_t MasterPTY::write(Process&, const byte* buffer, ssize_t size)
return size;
}
bool MasterPTY::can_read(Process&) const
bool MasterPTY::can_read(FileDescriptor&) const
{
if (!m_slave)
return true;
return !m_buffer.is_empty();
}
bool MasterPTY::can_write(Process&) const
bool MasterPTY::can_write(FileDescriptor&) const
{
return true;
}
@ -96,9 +96,9 @@ void MasterPTY::close()
}
}
int MasterPTY::ioctl(Process& process, unsigned request, unsigned arg)
int MasterPTY::ioctl(FileDescriptor& descriptor, unsigned request, unsigned arg)
{
if (request == TIOCSWINSZ)
return m_slave->ioctl(process, request, arg);
return m_slave->ioctl(descriptor, request, arg);
return -EINVAL;
}

10
Kernel/TTY/MasterPTY.h
View file

@ -20,13 +20,13 @@ public:
private:
// ^CharacterDevice
virtual ssize_t read(Process&, byte*, ssize_t) override;
virtual ssize_t write(Process&, const byte*, ssize_t) override;
virtual bool can_read(Process&) const override;
virtual bool can_write(Process&) const override;
virtual ssize_t read(FileDescriptor&, byte*, ssize_t) override;
virtual ssize_t write(FileDescriptor&, const byte*, ssize_t) override;
virtual bool can_read(FileDescriptor&) const override;
virtual bool can_write(FileDescriptor&) const override;
virtual void close() override;
virtual bool is_master_pty() const override { return true; }
virtual int ioctl(Process&, unsigned request, unsigned arg) override;
virtual int ioctl(FileDescriptor&, unsigned request, unsigned arg) override;
virtual const char* class_name() const override { return "MasterPTY"; }
RetainPtr<SlavePTY> m_slave;

8
Kernel/TTY/PTYMultiplexer.h
View file

@ -16,10 +16,10 @@ public:
// ^CharacterDevice
virtual KResultOr<Retained<FileDescriptor>> open(int options) override;
virtual ssize_t read(Process&, byte*, ssize_t) override { return 0; }
virtual ssize_t write(Process&, const byte*, ssize_t) override { return 0; }
virtual bool can_read(Process&) const override { return true; }
virtual bool can_write(Process&) const override { return true; }
virtual ssize_t read(FileDescriptor&, byte*, ssize_t) override { return 0; }
virtual ssize_t write(FileDescriptor&, const byte*, ssize_t) override { return 0; }
virtual bool can_read(FileDescriptor&) const override { return true; }
virtual bool can_write(FileDescriptor&) const override { return true; }
void notify_master_destroyed(Badge<MasterPTY>, unsigned index);

10
Kernel/TTY/SlavePTY.cpp
View file

@ -41,23 +41,23 @@ ssize_t SlavePTY::on_tty_write(const byte* data, ssize_t size)
return m_master->on_slave_write(data, size);
}
bool SlavePTY::can_write(Process&) const
bool SlavePTY::can_write(FileDescriptor&) const
{
return m_master->can_write_from_slave();
}
bool SlavePTY::can_read(Process& process) const
bool SlavePTY::can_read(FileDescriptor& descriptor) const
{
if (m_master->is_closed())
return true;
return TTY::can_read(process);
return TTY::can_read(descriptor);
}
ssize_t SlavePTY::read(Process& process, byte* buffer, ssize_t size)
ssize_t SlavePTY::read(FileDescriptor& descriptor, byte* buffer, ssize_t size)
{
if (m_master->is_closed())
return 0;
return TTY::read(process, buffer, size);
return TTY::read(descriptor, buffer, size);
}
void SlavePTY::close()

6
Kernel/TTY/SlavePTY.h
View file

@ -21,9 +21,9 @@ private:
virtual ssize_t on_tty_write(const byte*, ssize_t) override;
// ^CharacterDevice
virtual bool can_read(Process&) const override;
virtual ssize_t read(Process&, byte*, ssize_t) override;
virtual bool can_write(Process&) const override;
virtual bool can_read(FileDescriptor&) const override;
virtual ssize_t read(FileDescriptor&, byte*, ssize_t) override;
virtual bool can_write(FileDescriptor&) const override;
virtual const char* class_name() const override { return "SlavePTY"; }
virtual void close() override;

11
Kernel/TTY/TTY.cpp
View file

@ -24,12 +24,12 @@ void TTY::set_default_termios()
memcpy(m_termios.c_cc, default_cc, sizeof(default_cc));
}
ssize_t TTY::read(Process&, byte* buffer, ssize_t size)
ssize_t TTY::read(FileDescriptor&, byte* buffer, ssize_t size)
{
return m_buffer.read(buffer, size);
}
ssize_t TTY::write(Process&, const byte* buffer, ssize_t size)
ssize_t TTY::write(FileDescriptor&, const byte* buffer, ssize_t size)
{
#ifdef TTY_DEBUG
dbgprintf("TTY::write {%u} ", size);
@ -42,12 +42,12 @@ ssize_t TTY::write(Process&, const byte* buffer, ssize_t size)
return size;
}
bool TTY::can_read(Process&) const
bool TTY::can_read(FileDescriptor&) const
{
return !m_buffer.is_empty();
}
bool TTY::can_write(Process&) const
bool TTY::can_write(FileDescriptor&) const
{
return true;
}
@ -106,8 +106,9 @@ void TTY::set_termios(const termios& t)
);
}
int TTY::ioctl(Process& process, unsigned request, unsigned arg)
int TTY::ioctl(FileDescriptor&, unsigned request, unsigned arg)
{
auto& process = current->process();
pid_t pgid;
termios* tp;
winsize* ws;

10
Kernel/TTY/TTY.h
View file

@ -10,11 +10,11 @@ class TTY : public CharacterDevice {
public:
virtual ~TTY() override;
virtual ssize_t read(Process&, byte*, ssize_t) override;
virtual ssize_t write(Process&, const byte*, ssize_t) override;
virtual bool can_read(Process&) const override;
virtual bool can_write(Process&) const override;
virtual int ioctl(Process&, unsigned request, unsigned arg) override final;
virtual ssize_t read(FileDescriptor&, byte*, ssize_t) override;
virtual ssize_t write(FileDescriptor&, const byte*, ssize_t) override;
virtual bool can_read(FileDescriptor&) const override;
virtual bool can_write(FileDescriptor&) const override;
virtual int ioctl(FileDescriptor&, unsigned request, unsigned arg) override final;
virtual String absolute_path() const override { return tty_name(); }
virtual String tty_name() const = 0;