5.6. Summary

This chapter tied the previous chapters together by showing you how to build ladd, a simple alarm daemon, using RTA and the empty daemon. You saw the design of ladd's RTA table, the control point by which the user interfaces manage the alarm daemon. You also saw the alarm daemon's source code, including the three subroutines used by the empty daemon to implement the alarm daemon's run-time behavior. Finally, you saw how to configure the alarm daemon and how to manually set and clear an alarm from the command line.

The next chapter continues to develop Laddie's design by showing you how to handle events on an appliance, including events such as ladd sending messages to syslog.

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