log Device Driver

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The log driver is a STREAMS software device driver that provides an interface for the STREAMS error-logging and event-tracing processes.

The log driver presents two separate interfaces:
  • A function call interface in the kernel through which STREAMS drivers and modules submit log messages
  • A subset of ioctl operations and STREAMS messages for interaction with a user-level error logger, a trace logger, or processes that need to submit their own log messages