---
title: kCTErrorDomainPOSIX
framework: Core Telephony
role: symbol
role_heading: Global Variable
platforms: [iOS 4.0+, iPadOS 4.0+, Mac Catalyst 14.0+, macOS 10.10+]
path: coretelephony/kcterrordomainposix
---

# kCTErrorDomainPOSIX

The domain value for errors from POSIX.

## Declaration

```swift
var kCTErrorDomainPOSIX: Int { get }
```

## Discussion

Discussion POSIX error codes are listed in sys/errno.h.

## See Also

### Error Domains

- [kCTErrorDomainMach](coretelephony/kcterrordomainmach.md)
- [kCTErrorDomainNoError](coretelephony/kcterrordomainnoerror.md)