103 lines
2.8 KiB
C++
103 lines
2.8 KiB
C++
#pragma once
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#include <BAN/Array.h>
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#include <kernel/FS/Inode.h>
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#include <kernel/FS/VirtualFileSystem.h>
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#include <limits.h>
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#include <sys/stat.h>
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namespace Kernel
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{
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class OpenFileDescriptorSet
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{
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BAN_NON_COPYABLE(OpenFileDescriptorSet);
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public:
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OpenFileDescriptorSet(const Credentials&);
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~OpenFileDescriptorSet();
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OpenFileDescriptorSet& operator=(OpenFileDescriptorSet&&);
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BAN::ErrorOr<void> clone_from(const OpenFileDescriptorSet&);
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BAN::ErrorOr<int> open(VirtualFileSystem::File&&, int flags);
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BAN::ErrorOr<int> open(BAN::StringView absolute_path, int flags);
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BAN::ErrorOr<int> socket(int domain, int type, int protocol);
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BAN::ErrorOr<void> pipe(int fds[2]);
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BAN::ErrorOr<int> dup2(int, int);
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BAN::ErrorOr<int> fcntl(int fd, int cmd, int extra);
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BAN::ErrorOr<off_t> seek(int fd, off_t offset, int whence);
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BAN::ErrorOr<off_t> tell(int) const;
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BAN::ErrorOr<void> truncate(int fd, off_t length);
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BAN::ErrorOr<void> close(int);
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void close_all();
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void close_cloexec();
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BAN::ErrorOr<size_t> read(int fd, BAN::ByteSpan);
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BAN::ErrorOr<size_t> write(int fd, BAN::ConstByteSpan);
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BAN::ErrorOr<size_t> read_dir_entries(int fd, struct dirent* list, size_t list_len);
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BAN::ErrorOr<VirtualFileSystem::File> file_of(int) const;
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BAN::ErrorOr<BAN::StringView> path_of(int) const;
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BAN::ErrorOr<BAN::RefPtr<Inode>> inode_of(int);
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BAN::ErrorOr<int> status_flags_of(int) const;
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private:
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struct OpenFileDescription : public BAN::RefCounted<OpenFileDescription>
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{
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OpenFileDescription(VirtualFileSystem::File file, off_t offset, int status_flags)
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: file(BAN::move(file))
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, offset(offset)
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, status_flags(status_flags)
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{ }
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VirtualFileSystem::File file;
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off_t offset { 0 };
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int status_flags;
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friend class BAN::RefPtr<OpenFileDescription>;
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};
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struct OpenFile
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{
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OpenFile() = default;
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OpenFile(BAN::RefPtr<OpenFileDescription> description, int descriptor_flags)
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: description(BAN::move(description))
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, descriptor_flags(descriptor_flags)
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{ }
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BAN::RefPtr<Inode> inode() const { ASSERT(description); return description->file.inode; }
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BAN::StringView path() const { ASSERT(description); return description->file.canonical_path.sv(); }
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int& status_flags() { ASSERT(description); return description->status_flags; }
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const int& status_flags() const { ASSERT(description); return description->status_flags; }
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off_t& offset() { ASSERT(description); return description->offset; }
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const off_t& offset() const { ASSERT(description); return description->offset; }
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BAN::RefPtr<OpenFileDescription> description;
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int descriptor_flags { 0 };
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};
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BAN::ErrorOr<void> validate_fd(int) const;
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BAN::ErrorOr<int> get_free_fd() const;
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BAN::ErrorOr<void> get_free_fd_pair(int fds[2]) const;
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private:
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const Credentials& m_credentials;
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BAN::Array<OpenFile, OPEN_MAX> m_open_files;
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};
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}
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