Passing parameters to bash when executing a script fetched by curl

Question

I know how to execute remote Bash scripts like this:

curl http://example.com/script.sh | bash

or

bash < <( curl http:         


        

Answer 1

To improve on jinowolski's answer a bit, you should use:

curl http://example.com/script.sh | bash -s -- arg1 arg2

Notice the two dashes (--) which are telling bash to not process anything following it as arguments to bash.

This way it will work with any kind of arguments, e.g.:

curl -L http://bootstrap.saltstack.org | bash -s -- -M -N stable

This will of course work with any kind of input via stdin, not just curl, so you can confirm that it works with simple BASH script input via echo:

echo 'i=1; for a in $@; do echo "$i = $a"; i=$((i+1)); done' | \
bash -s -- -a1 -a2 -a3 --long some_text

Will give you the output

1 = -a1
2 = -a2
3 = -a3
4 = --long
5 = some_text