Rundeck looping over multi-value options

gistfile1.bash

# This job has two options, action and binary.
# binary accepts multi-values, and the separator is ','
# the following is a script step that loops over the binary arguments
# commandline arguments are : ${option.action} ${option.binary}

ACT=$1 
BLIST=$2 
IFS=$',' 
for B in $BLIST; do 
    sudo $B $ACT 
done 
unset IFS