```typescript
import { fchownSync } from "node:node__fs.d.ts";
```
fchownSync(
fd: number,
uid: number,
gid: number,
): void
Sets the owner of the file. Returns `undefined`.
See the POSIX [`fchown(2)`](http://man7.org/linux/man-pages/man2/fchown.2.html) documentation for more detail.