Am I reading the bash script correctly?

Question

bash

Good day to all.
There is a bash script that is used as an entrypoint for the docker image. The script is not mine and contains several constructions that seem to be intuitive, but I did not find any mention of them anywhere in the documentation. Please look at the picture below and tell me if I understand the process and sequence of code blocks execution correctly?



Also I don't understand what does "* )" mean at the end of case? Is it something like PHP's default section (execute if nothing else fits) or should it be taken literally?

Answer 1

1 and 2 - yes
3 - anything that did not fall into the previous paragraphs (the list from the first paragraph or app: help). Yes, this is an analogue of default: in PHP