f9/sdk/dart/package-fuchsia_vfs_vfs/ComposedPseudoDir/open.md

# open method




    *[<Null safety>](https://dart.dev/null-safety)*



- @override

void open
(dynamic flags, int mode, String path, [InterfaceRequest](../../package-fidl_fidl/InterfaceRequest-class.md) request, [dynamic parentFlags])

_<span class="feature override">override</span>_



<p>This function is called from <code>fidl_fuchsia_io.Directory#open</code>.
This function parses path and opens correct node.</p>
<p>Vnode provides a simplified implementation for non-directory types.
Behavior:
For directory types, it will throw UnimplementedError error.
For non empty path it will fail with <code>ERR_NOT_DIR</code>.</p>



## Implementation

```dart
@override
void open(fidl_io.OpenFlags flags, int mode, String path,
    fidl.InterfaceRequest<fidl_io.Node> request,
    [fidl_io.OpenFlags? parentFlags]) {
  if (_inheritedNodes.contains(path)) {
    _directory.open(flags, mode, path, request);
  } else {
    super.open(
        flags, mode, path, request, parentFlags ?? Flags.fsRightsDefault());
  }
}
```