Returns the file handle associated with the standard input file.
- iOS 2.0+
- macOS 10.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
The shared file handle associated with the standard input file.
Conventionally this is a terminal device on which the user enters a stream of data. There is one standard input file handle per process; it is a shared instance.
When using this method to create a file handle object, the file handle owns its associated file descriptor and is responsible for closing it.