Daemon: Create and control Unix daemon processes

This package provides a base class that can create and manage daemon processes on Linux or other Unix-like systems.

This base class can fork the current process and store the child process identifier in a pid file. The forked process enters an infinite loop executing its job until it receives a termination signal.

The base class is not useful by itself. It needs to be derived to implement daemon job as a function of the sub-class. A daemon job subclass is provided as an example.