Method chdir

lib/vfs/prodos.cc:265–278

    }

    std::unique_ptr<Directory> chdir(const Path& path)
    {
        std::unique_ptr<Directory> dir =
            std::make_unique<Directory>(this, ROOT_DIRECTORY_BLOCK);
        for (const auto& element : path)
        {
            auto entry = dir->find(element);
            if (entry->file_type == TYPE_FILE)
                throw BadPathException("tried to use a file like a directory");

            dir = std::make_unique<Directory>(this, entry->keyBlock);
        }
        return dir;
    }

    /* Always appends 128kB of data. */
    void readIndexBlock(const Bytes& indexBlock, ByteWriter& bw)