Chapter 5. THE LADDIE ALARM SYSTEM: A SAMPLE APPLIANCE
Previous chapters covered how to build and secure a daemon and how to communicate with the daemon while it is running. We'll tie these topics together in this chapter by building Laddie, a Linux-based alarm system.[1]
[1] Laddie is a sample appliance used to illustrate the techniques and software presented in this book. Laddie is not a commercially viable alarm system and should never be used in place of a real alarm system.
Laddie uses the five status inputs on a standard PC parallel port as sensor inputs to the alarm system. The heart of the Laddie appliance is the ladd (pronounced lad-dee) daemon that polls the status lines and reports input transitions using syslog(). An alarm system is ...
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