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

# open method




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




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





<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
void open(
    OpenFlags flags, int mode, String path, InterfaceRequest<Node> request,
    [OpenFlags? parentFlags]) {
  if (type() == DirentType.directory) {
    // dir types should implement this function
    throw UnimplementedError();
  }
  sendErrorEvent(flags, ZX.ERR_NOT_DIR, request);
}
```