this post was submitted on 27 Jul 2023
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bash is veeery old and it implements all of posix.
Bash's posix mode still has a lot of bashisms. The only way to test true posix compliance is to test with other shells like
dashandash. I have found this is the case a lot of time. People will say it's POSIX compliant shell, but it'll obviously only be tested in bash Like at that point just make it a bash script, since pretty much every system under the sun has it.