docker-mailserver/target/bin/addsaslpassword

#! /bin/bash

# shellcheck source=../scripts/helper-functions.sh
. /usr/local/bin/helper-functions.sh

DATABASE=${DATABASE:-/tmp/docker-mailserver/postfix-sasl-password.cf}

function __usage { echo "Usage: addsaslpassword <domain> <username> <password>" ; }

[[ ${1:-} == 'help' ]] && { __usage ; exit 0 ; }

DOMAIN="${1}"
USER="${2}"
PASSWD="${3}"

[[ -z ${DOMAIN} ]] && { __usage ; errex 'No domain specified' ; }
[[ -z ${USER} ]] && { __usage ; errex 'No username specified' ; }

if [[ -z ${PASSWD} ]]
then
  read -r -s -p "Enter Password: " PASSWD
  echo
  [[ -z ${PASSWD} ]] && errex 'Password must not be empty'
fi

if grep -qi "^@${DOMAIN}" "${DATABASE}" 2>/dev/null
then
  sed -i \
    "s|^@${DOMAIN}.*|@${DOMAIN}\t\t${USER}:${PASSWD}|" \
    "${DATABASE}"
else
  echo -e "@${DOMAIN}\t\t${USER}:${PASSWD}" >>"${DATABASE}"
fi