Retired Document

Important: This sample code may not represent best practices for current development. The project may use deprecated symbols and illustrate technologies and techniques that are no longer recommended.

IOPrintSuperClasses

Last Revision:	Version 1.1, 2005-08-17 Updated to produce a universal binary. No code changes were required. Separately, updated to use IOObjectCopySuperclassForClass, which was introduced in Mac OS X 10.4.
Build Requirements:	Xcode 2.1
Runtime Requirements:	Mac OS X 10.2 or later

The sample is a trivial example of using the I/O Kit registry, but it also represents a useful tool for exploring the I/O Kit class hierarchy. Given the name of a class, this tool will print all of the super-classes of that class. For example, if you ask it for the super-classes of IOUSBInterface, the tool will print IOUSBNub, IORegistryEntry, IOService, and OSObject.