docker-mailserver/target/bin/setquota

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#! /bin/bash
# ? This is done to ignore the message "Make sure not to read and write
# ? the same file in the same pipeline", which is a result of ${DATABASE}
# ? being used below. (This disables the message file-wide.)
# shellcheck disable=SC2094
# shellcheck source=../bin-helper.sh
. /usr/local/bin/bin-helper.sh
DATABASE=${DATABASE:-/tmp/docker-mailserver/dovecot-quotas.cf}
USER_DATABASE=${USER_DATABASE:-/tmp/docker-mailserver/postfix-accounts.cf}
USER="${1}"
shift
QUOTA="${*}"
function usage { echo "Usage: setquota <user@domain> [<quota>]" ; }
[[ -z ${USER} ]] && { usage ; errex "no username specified" ; }
[[ "${USER}" =~ .*\@.* ]] || { usage ; errex "username must include the domain" ; }
if ! grep -qE "^${USER}\|" "${USER_DATABASE}"
then
usage; errex "user ${USER} does not exist"
fi
# check quota
if [[ -n ${QUOTA} ]] && ! echo "${QUOTA}" | grep -qE "^([0-9]+(B|k|M|G|T)|0)\$"
then
usage
errex "invalid quota format. e.g. 302M (B (byte), k (kilobyte), M (megabyte), G (gigabyte) or T (terabyte))"
fi
# Protect config file with lock to avoid race conditions
touch "${DATABASE}"
(
flock -e 200
if [ -z "${QUOTA}" ]; then
read -r -s "Enter quota (e.g. 10M): " QUOTA
echo
[[ -z "${QUOTA}" ]] && errex "Quota must not be empty. Use 0 for unlimited quota"
fi
# check quota
if [[ -n ${QUOTA} ]] && ! echo "${QUOTA}" | grep -qE "^([0-9]+(B|k|M|G|T)|0)\$"
then
usage
errex "invalid quota format. e.g. 302M (B (byte), k (kilobyte), M (megabyte), G (gigabyte) or T (terabyte))"
fi
delquota "${USER}"
echo "${USER}:${QUOTA}" >>"${DATABASE}"
) 200< "${DATABASE}"