---
title: "CFFileDescriptorEnableCallBacks(_:_:)"
framework: corefoundation
role: symbol
role_heading: Function
path: "corefoundation/cffiledescriptorenablecallbacks(_:_:)"
---

# CFFileDescriptorEnableCallBacks(_:_:)

Enables callbacks for a given CFFileDescriptor.

## Declaration

```swift
func CFFileDescriptorEnableCallBacks(_ f: CFFileDescriptor!, _ callBackTypes: CFOptionFlags)
```

## Parameters

- `f`: A CFFileDescriptor.
- `callBackTypes`: A bitmask that specifies which callbacks to enable (see doc://com.apple.corefoundation/documentation/CoreFoundation/1477595-callback-identifiers for possible components).

## See Also

### Managing Callbacks

- [CFFileDescriptorDisableCallBacks(_:_:)](corefoundation/cffiledescriptordisablecallbacks(_:_:).md)