US Patent 7099866 Method of generating and presenting kernel data

IDDS is implemented as a kernel resident data source which provides per-system call audit records into user space in a timely manner. Each invocation of a system call is audited and a record of the activity is placed into a circular buffer in the kernel. A user-space process reads the data from the buffer via a device driver interface. A device driver provides a clean interface between the kernel and the IDS. The semantics of device drivers are familiar to most UNIX programmers, following the standard file-based open-read-write-close paradigm.