---
title: "CFSocketUnregister(_:_:_:)"
framework: corefoundation
role: symbol
role_heading: Function
path: "corefoundation/cfsocketunregister(_:_:_:)"
---

# CFSocketUnregister(_:_:_:)

Unregisters a value or socket signature with a CFSocket name server.

## Declaration

```swift
func CFSocketUnregister(_ nameServerSignature: UnsafePointer<CFSocketSignature>!, _ timeout: CFTimeInterval, _ name: CFString!) -> CFSocketError
```

## Parameters

- `nameServerSignature`: The socket signature for the name server. If NULL, this function contacts the default server, which is assumed to be a local process using TCP/IP to listen on the port number returned from doc://com.apple.corefoundation/documentation/CoreFoundation/CFSocketGetDefaultNameRegistryPortNumber(). If nameServerSignature is incomplete, the missing values are replaced with the default server’s values, if appropriate.
- `timeout`: The time to wait for the server to accept a connection and to reply to the registration request.
- `name`: The name of the property-list value or socket signature to unregister.

## Return Value

Return Value An error code indicating success or failure.

## Discussion

Discussion The value being unregistered was previously registered with CFSocketRegisterValue(_:_:_:_:) or CFSocketRegisterSocketSignature(_:_:_:_:).

## See Also

### Core Foundation Socket Name Server Utilities Miscellaneous Functions

- [CFSocketCopyRegisteredSocketSignature(_:_:_:_:_:)](corefoundation/cfsocketcopyregisteredsocketsignature(_:_:_:_:_:).md)
- [CFSocketCopyRegisteredValue(_:_:_:_:_:)](corefoundation/cfsocketcopyregisteredvalue(_:_:_:_:_:).md)
- [CFSocketGetDefaultNameRegistryPortNumber()](corefoundation/cfsocketgetdefaultnameregistryportnumber().md)
- [CFSocketRegisterSocketSignature(_:_:_:_:)](corefoundation/cfsocketregistersocketsignature(_:_:_:_:).md)
- [CFSocketRegisterValue(_:_:_:_:)](corefoundation/cfsocketregistervalue(_:_:_:_:).md)
- [CFSocketSetDefaultNameRegistryPortNumber(_:)](corefoundation/cfsocketsetdefaultnameregistryportnumber(_:).md)