If you pass an invalid option to Artemis CLI, it will return 0.

Here's an example:

./artemis create --force ---allow-anonymous --password=admin --http-host 0.0.0.0 --password "" --aio --role=admin --user=admin --java-options="" --name=amq /home/jamq/runtime-aio-baselineiii ; echo $?
Found unexpected parameters: [---allow-anonymous]

usage: artemis <command> [<args>]

The most commonly used artemis commands are:
address Address tools group (create|delete|update|show) (example ./artemis address create)
browser It will send consume messages from an instance
consumer It will send consume messages from an instance
create creates a new broker instance
data data tools group (print) (example ./artemis data print)
help Display help information
mask mask a password and print it out
migrate1x Migrates the configuration of a 1.x Artemis Broker
producer It will send messages to an instance
queue Queue tools group (create|delete|update) (example ./artemis queue create)

See 'artemis help <command>' for more information on a specific command.

0

A more adequate approach would be to return an error code to the OS. Among other things, this help users automating the creation of instances if they make a mistake.