line 5: ${$2/.*=/}: bad substitution

[Galera-Monitor]

type=monitor

module=galeramon

servers=C1N1,

        C1N2,

        C1N3

user=maxscale

password=password

monitor_interval=10000

script=/path/to/maxscale_monitor_alert_script.sh --initiator=$INITIATOR --parent=$PARENT --children=$CHILDREN --event=$EVENT --node_list=$NODELIST --list=$LIST --master_list=$MASTERLIST --slave_list=$SLAVELIST --synced_list=$SYNCEDLIST

#!/usr/bin/env bash

initiator=""

parent=""

children=""

event=""

# credentials aren't needed for an alert script

#credentials=""

node_list=""

list=""

master_list=""

slave_list=""

synced_list=""

process_arguments()

{

   while [ "$1" != "" ]; do

      if [[ "$1" =~ ^--initiator=.* ]]; then

         initiator=${1#'--initiator='}

      elif [[ "$1" =~ ^--parent.* ]]; then

         parent=${1#'--parent='}

      elif [[ "$1" =~ ^--children.* ]]; then

         children=${1#'--children='}

      elif [[ "$1" =~ ^--event.* ]]; then

         event=${1#'--event='}

#      elif [[ "$1" =~ ^--credentials.* ]]; then

#         credentials=${1#'--credentials='}

      elif [[ "$1" =~ ^--node_list.* ]]; then

         node_list=${1#'--node_list='}

      elif [[ "$1" =~ ^--list.* ]]; then

         list=${1#'--list='}

      elif [[ "$1" =~ ^--master_list.* ]]; then

         master_list=${1#'--master_list='}

      elif [[ "$1" =~ ^--slave_list.* ]]; then

         slave_list=${1#'--slave_list='}

      elif [[ "$1" =~ ^--synced_list.* ]]; then

         synced_list=${1#'--synced_list='}

      fi

      shift

   done

}

process_arguments $@

read -r -d '' MESSAGE << EOM

A server has changed state. The following information was provided:

Initiator: $initiator

Parent: $parent

Children: $children

Event: $event

Node list: $node_list

List: $list

Master list: $master_list

Slave list: $slave_list

Synced list: $synced_list

EOM

echo "$MESSAGE" | mail -s "MaxScale received $event event for initiator $initiator." mariadb_admin@domain.com