Method getChild

system/lib/wasmfs/file.cpp:54–78

}

std::shared_ptr<File> Directory::Handle::getChild(const std::string& name) {
  // Unlinked directories must be empty, without even "." or ".."
  if (!getParent()) {
    return nullptr;
  }
  if (name == ".") {
    return file;
  }
  if (name == "..") {
    return getParent();
  }
  // Check whether the cache already contains this child.
  auto& dcache = getDir()->dcache;
  if (auto it = dcache.find(name); it != dcache.end()) {
    return it->second.file;
  }
  // Otherwise check whether the backend contains an underlying file we don't
  // know about.
  auto child = getDir()->getChild(name);
  if (!child) {
    return nullptr;
  }
  cacheChild(name, child, DCacheKind::Normal);
  return child;
}

bool Directory::Handle::mountChild(const std::string& name,
                                   std::shared_ptr<File> child) {