This is a fairly common question it seems. One answer that might be helpful can be found here.

You must always remember that the primary goal is to drain the swamp even when you are hip-deep in alligators.

In reply to Re: Can a script tell if it is being run from inside a script versus in an interactive terminal session? by boftx
in thread Can a script tell if it is being run from inside a script versus in an interactive terminal session? by hepcat72

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