Quick Test Your Bash Shell

Challenge Yourself

See following bash code and answer what the output is without running it

https://github.com/vumdao/bash/blob/master/bash_test/wq.sh

#!/bin/bash
set -e

mutex_test() { return -23; }

mutex_test

echo $?

echo "Done"

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Comments

[Ben Sinclair]

If you run it via bash or make it executable and run it, it'll presumably either display nothing (which is what I expect to happen because -23 is non-zero and set -e means bomb out whenever anything returns non-zero) or possibly display -23 (if it doesn't count in a function, but I don't think that's the case).

If you source/dot the file to run it in the current context, you'll end up closing your shell.

[Bobby]

I use the shellcheck tool as described here:

devdojo.com/guide/bash/debugging-a...

You can use their website directly or you could install the CLI tool as well.

It is very handy, it gives you some suggestions on some best practices too.