docker-mailserver/target/bin/addsaslpassword

#! /bin/bash

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

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

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

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

[[ -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