in reply to Continuous or timed?

Create a cron job running around midnight or high noon, have that job calculate sunrise and sunset and submit them to the cron system.

Depending on your cron implementation, it may be sufficient to create a file in a specific directory containing the two times and the open and close commands. Other cron implementations may need to run a command like crontab to submit such a file.

Alexander

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Re^2: Continuous or timed?
by Bod (Parson) on Dec 11, 2020 at 16:36 UTC

    Create a cron job running around midnight or high noon, have that job calculate sunrise and sunset and submit them to the cron system.

    That seems a very sensible approach and certainly one I would adopt if higher accuracy were needed. I like that is gets kicked off daily so is immune to the script failing.

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