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Leopard Sample Code: Darwin
The I/O Kit is the device driver subsystem of Mac OS X and is part of Darwin. The I/O Kit provides a set of C functions and C++ classes, including object-oriented abstractions common to various families of drivers. In addition, for many device types, the I/O Kit provides a device interface that enables an application to communicate with and control a device from user space.
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IOKitWithLibrary (HTML) (DMG) (ZIP)
Shows how an I/O Kit driver can link with a C library from a separate kernel extension.
 2003-08-27
IOPrintSuperClasses (HTML) (DMG) (ZIP)
Given the name of a class, this tool will print all of the super-classes of that class.
 2005-08-17
SampleFilterScheme (HTML) (DMG) (ZIP)
Demonstrates a simple filter scheme which passes all operations through to its provider unchanged.
2006-01-03
SampleUSBAudioPlugin (HTML) (DMG) (ZIP)
USB audio plugin that performs a lowpass filtering operation on audio streamed through an audio USB Device.
 2005-03-07
SCSIHBAEmulator (HTML) (DMG) (ZIP)
Demonstration of how to implement a virtual parallel tasking SCSI host bus adapter (HBA)
 2007-02-20
SimpleDataQueue (HTML) (DMG) (ZIP)
Implements an IODataQueue inside an I/O Kit KEXT which passes events and data to user space.
 2003-01-14
SimpleUserClient (HTML) (DMG) (ZIP)
Shows how to create a user client for an I/O Kit kernel driver.
 2008-08-27
TimerEventSample (HTML) (DMG) (ZIP)
Shows how to set up and use an IOTimerEventSource in a kext.
 2003-01-14
VendorSpecificType00 (HTML) (DMG) (ZIP)
Demonstrates how to access vendor-specific storage device functionality using a simple interface from user space code.
2006-10-02
VolumeToBSDNode (HTML) (DMG) (ZIP)
Shows how to iterate across all mounted volumes and retrieve their BSD node names.
 2006-10-16