---
title: fd
framework: endpointsecurity
role: symbol
role_heading: Instance Property
path: endpointsecurity/es_fd_t/fd
---

# fd

The file descriptor number.

## Declaration

```swift
var fd: Int32
```

## See Also

### Inspecting File Descriptor Properties

- [fdtype](endpointsecurity/es_fd_t/fdtype.md)