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I want to write a Ruby program that will always be running in the background (a daemon) on my Mac.
Can someone point me in the right direction on how this would be done?
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Daemons provides an easy way to wrap existing ruby scripts (for example a self-written server) to be run as a daemon and to be controlled by simple start/stop/restart commands. You can also call blocks as daemons and control them from the parent or just daemonize the current process.
A daemon is a long-running background process that answers requests for services. The term originated with Unix, but most operating systems use daemons in some form or another. In Unix, the names of daemons conventionally end in "d". Some examples include inetd , httpd , nfsd , sshd , named , and lpd .
In a Unix environment, the parent process of a daemon is often, but not always, the init process. A daemon is usually created either by a process forking a child process and then immediately exiting, thus causing init to adopt the child process, or by the init process directly launching the daemon.
Ruby 1.9.x has now the following:
Process.daemon Put it in your code and that's it.
Taken from "Daemon Processes in Ruby."
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