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#pragma once
#include "VirtualFileSystem.h"
#include "InodeMetadata.h"
#include "FIFO.h"
#include <AK/ByteBuffer.h>
#include <AK/CircularQueue.h>
#include <AK/Retainable.h>
#ifdef SERENITY
class TTY;
class Process;
#endif
class FileDescriptor : public Retainable<FileDescriptor> {
public:
static RetainPtr<FileDescriptor> create(RetainPtr<Vnode>&&);
static RetainPtr<FileDescriptor> create_pipe_writer(FIFO&);
static RetainPtr<FileDescriptor> create_pipe_reader(FIFO&);
~FileDescriptor();
RetainPtr<FileDescriptor> clone();
int close();
Unix::off_t seek(Unix::off_t, int whence);
ssize_t read(byte*, size_t);
ssize_t write(const byte* data, size_t);
int stat(Unix::stat*);
bool has_data_available_for_reading(Process&);
bool can_write();
ssize_t get_dir_entries(byte* buffer, size_t);
ByteBuffer read_entire_file();
String absolute_path();
bool is_directory() const;
bool is_character_device() const { return m_vnode && m_vnode->isCharacterDevice(); }
CharacterDevice* character_device() { return m_vnode ? m_vnode->characterDevice() : nullptr; }
#ifdef SERENITY
bool is_tty() const;
const TTY* tty() const;
TTY* tty();
#endif
InodeMetadata metadata() const { return m_vnode->metadata(); }
Vnode* vnode() { return m_vnode.ptr(); }
Inode* inode() { return m_vnode ? m_vnode->core_inode() : nullptr; }
#ifdef SERENITY
bool is_blocking() const { return m_is_blocking; }
void set_blocking(bool b) { m_is_blocking = b; }
dword file_flags() const { return m_file_flags; }
void set_file_flags(dword flags) { m_file_flags = flags; }
bool is_fifo() const { return m_fifo; }
FIFO::Direction fifo_direction() { return m_fifo_direction; }
#endif
ByteBuffer& generator_cache() { return m_generator_cache; }
private:
friend class VFS;
explicit FileDescriptor(RetainPtr<Vnode>&&);
FileDescriptor(FIFO&, FIFO::Direction);
RetainPtr<Vnode> m_vnode;
Unix::off_t m_current_offset { 0 };
ByteBuffer m_generator_cache;
#ifdef SERENITY
bool m_is_blocking { true };
dword m_file_flags { 0 };
RetainPtr<FIFO> m_fifo;
FIFO::Direction m_fifo_direction { FIFO::Neither };
#endif
};
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