Source: https://github.com/dubiousjim/dcron
Ever wonder how your cron jobs are being run? Today, we deep dive into the source code of a light-weight cron daemon written by Linux veteran Matthew Dillon. We learn all about daemon processes, the fork system call, and file redirection; we also see some of the standard practices and patterns around background jobs, job management, and signals.
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Errata:
At 15:05 I mention Dillon uses arbitrary braces to create an inner closure. While this is indeed a use case for this, there's another possible reason: in C89, declarations were only valid at the beginning of blocks. It's possible Dillon did this for backward compatibility with older compilers.
