Api::IoError::IoErrorCode IoFileError::getErrorCode() const {

  switch (errno_) {

  case HANDLE_ERROR_PERM:

    return IoErrorCode::Permission;

  case HANDLE_ERROR_INVALID:

    return IoErrorCode::BadFd;

  default:

    ENVOY_LOG_MISC(debug, "Unknown error code {} details {}", errno_, getErrorDetails());

    return IoErrorCode::UnknownError;

  }

}

std::string IoFileError::getErrorDetails() const { return errorDetails(errno_); }

bool FileSharedImpl::isOpen() const { return fd_ != INVALID_HANDLE; };

absl::string_view FileSharedImpl::path() const { return filepath_and_type_.path_; };

DestinationType FileSharedImpl::destinationType() const { return filepath_and_type_.file_type_; };

std::string FileSharedImpl::generateTmpFilePath(absl::string_view path) {

  static std::random_device rd;

  static std::mt19937 gen(rd());

  static std::uniform_int_distribution<> distribution('A', 'Z');

  std::array<char, 8> out;

  for (int i = 0; i < 8; i++) {

    out[i] = distribution(gen);

  }

  return absl::StrCat(path, "/envoy_", absl::string_view{&out[0], out.size()}, ".tmp");

}