Creates a file descriptor from a dictionary directly.
- macOS 10.7+
- Mac Catalyst 13.0+
The dictionary object which is to be examined.
The key whose value is to be obtained.
A new file descriptor created from the value for the specified key. You are responsible for close(2)ing this descriptor. -1 if the value for the specified key is not a file descriptor value or if there is no value for the specified key.