docker-mailserver/target/check-for-changes.sh
Georg Lauterbach da8171388f
Complete Refactor for target/bin (#1654)
* documentation and script updates trying to fix #1647
* preparations for refactoring target/bin/
* complete refactor for target/bin/
* changing script output slightly
* outsourcing functions in `bin-helper.sh`
* re-wrote linting to allow for proper shellcheck -x execution
* show explanation for shellcheck ignore
* adding some more information
2020-10-21 18:16:32 +02:00

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#! /bin/bash
# version 0.2.0
#
# <INSERT TASK HERE>
# shellcheck source=./helper-functions.sh
. /usr/local/bin/helper-functions.sh
LOG_DATE=$(date +"%Y-%m-%d %H:%M:%S ")
echo "${LOG_DATE} Start check-for-changes script."
# ? Checks ------------------------------------------------
cd /tmp/docker-mailserver || exit 1
# Check postfix-accounts.cf exist else break
if [[ ! -f postfix-accounts.cf ]]
then
echo "${LOG_DATE} postfix-accounts.cf is missing! This should not run! Exit!"
exit
fi
# Verify checksum file exists; must be prepared by start-mailserver.sh
if [[ ! -f ${CHKSUM_FILE} ]]
then
echo "${LOG_DATE} ${CHKSUM_FILE} is missing! Start script failed? Exit!"
exit
fi
# ? Actual script begins ----------------------------------
# Determine postmaster address, duplicated from start-mailserver.sh
# This script previously didn't work when POSTMASTER_ADDRESS was empty
if [[ -n ${OVERRIDE_HOSTNAME} ]]
then
DOMAINNAME="${OVERRIDE_HOSTNAME#*.}"
else
DOMAINNAME="$(hostname -d)"
fi
PM_ADDRESS="${POSTMASTER_ADDRESS:=postmaster@${DOMAINNAME}}"
echo "${LOG_DATE} Using postmaster address ${PM_ADDRESS}"
sleep 10
while true
do
LOG_DATE=$(date +"%Y-%m-%d %H:%M:%S ")
# get chksum and check it, no need to lock config yet
_monitored_files_checksums >"${CHKSUM_FILE}.new"
if ! cmp --silent -- "${CHKSUM_FILE}" "${CHKSUM_FILE}.new"
then
echo "${LOG_DATE} Change detected"
CHANGED=$(grep -Fxvf "${CHKSUM_FILE}" "${CHKSUM_FILE}.new" | sed 's/^[^ ]\+ //')
mv "${CHKSUM_FILE}.new" "${CHKSUM_FILE}"
# Bug alert! This overwrites the alias set by start-mailserver.sh
# Take care that changes in one script are propagated to the other
# ! NEEDS FIX -----------------------------------------
# TODO FIX --------------------------------------------
# ! NEEDS EXTENSIONS ----------------------------------
# TODO Perform updates below conditionally too --------
# Also note that changes are performed in place and are not atomic
# We should fix that and write to temporary files, stop, swap and start
# Lock configuration while working
(
flock -e 200
for FILE in ${CHANGED}
do
case ${FILE} in
/etc/letsencrypt/acme.json)
for certdomain in ${SSL_DOMAIN} ${HOSTNAME} ${DOMAINNAME}
do
if _extract_certs_from_acme "${certdomain}"
then
break
fi
done
;;
* ) _notify 'warn' 'file not found for certificate in check_for_changes.sh' ;;
esac
done
# regenerate postix aliases
echo "root: ${PM_ADDRESS}" >/etc/aliases
if [[ -f /tmp/docker-mailserver/postfix-aliases.cf ]]
then
cat /tmp/docker-mailserver/postfix-aliases.cf >>/etc/aliases
fi
postalias /etc/aliases
# regenerate postfix accounts
: >/etc/postfix/vmailbox
: >/etc/dovecot/userdb
if [[ -f /tmp/docker-mailserver/postfix-accounts.cf ]] && [[ ${ENABLE_LDAP} -ne 1 ]]
then
sed -i 's/\r//g' /tmp/docker-mailserver/postfix-accounts.cf
echo "# WARNING: this file is auto-generated. Modify config/postfix-accounts.cf to edit user list." >/etc/postfix/vmailbox
# Checking that /tmp/docker-mailserver/postfix-accounts.cf ends with a newline
# shellcheck disable=SC1003
sed -i -e '$a\' /tmp/docker-mailserver/postfix-accounts.cf
chown dovecot:dovecot /etc/dovecot/userdb
chmod 640 /etc/dovecot/userdb
sed -i -e '/\!include auth-ldap\.conf\.ext/s/^/#/' /etc/dovecot/conf.d/10-auth.conf
sed -i -e '/\!include auth-passwdfile\.inc/s/^#//' /etc/dovecot/conf.d/10-auth.conf
# rebuild relay host
if [[ -n ${RELAY_HOST} ]]
then
# keep old config
: >/etc/postfix/sasl_passwd
if [[ -n ${SASL_PASSWD} ]]
then
echo "${SASL_PASSWD}" >>/etc/postfix/sasl_passwd
fi
# add domain-specific auth from config file
if [[ -f /tmp/docker-mailserver/postfix-sasl-password.cf ]]
then
while read -r LINE
do
if ! echo "${LINE}" | grep -q -e "\s*#"
then
echo "${LINE}" >>/etc/postfix/sasl_passwd
fi
done < <(grep -v "^\s*$\|^\s*\#" /tmp/docker-mailserver/postfix-sasl-password.cf || true)
fi
# add default relay
if [[ -n "${RELAY_USER}" ]] && [[ -n "${RELAY_PASSWORD}" ]]
then
echo "[${RELAY_HOST}]:${RELAY_PORT} ${RELAY_USER}:${RELAY_PASSWORD}" >>/etc/postfix/sasl_passwd
fi
fi
# creating users ; 'pass' is encrypted
# comments and empty lines are ignored
while IFS=$'|' read -r LOGIN PASS
do
USER=$(echo "${LOGIN}" | cut -d @ -f1)
DOMAIN=$(echo "${LOGIN}" | cut -d @ -f2)
user_attributes=""
# test if user has a defined quota
if [[ -f /tmp/docker-mailserver/dovecot-quotas.cf ]]
then
declare -a USER_QUOTA
IFS=':' ; read -r -a USER_QUOTA < <(grep "${USER}@${DOMAIN}:" -i /tmp/docker-mailserver/dovecot-quotas.cf)
unset IFS
[[ ${#USER_QUOTA[@]} -eq 2 ]] && user_attributes="${user_attributes}userdb_quota_rule=*:bytes=${USER_QUOTA[1]}"
fi
echo "${LOGIN} ${DOMAIN}/${USER}/" >>/etc/postfix/vmailbox
# user database for dovecot has the following format:
# user:password:uid:gid:(gecos):home:(shell):extra_fields
# example :
# ${LOGIN}:${PASS}:5000:5000::/var/mail/${DOMAIN}/${USER}::userdb_mail=maildir:/var/mail/${DOMAIN}/${USER}
echo "${LOGIN}:${PASS}:5000:5000::/var/mail/${DOMAIN}/${USER}::${user_attributes}" >>/etc/dovecot/userdb
mkdir -p "/var/mail/${DOMAIN}/${USER}"
if [[ -e /tmp/docker-mailserver/${LOGIN}.dovecot.sieve ]]
then
cp "/tmp/docker-mailserver/${LOGIN}.dovecot.sieve" "/var/mail/${DOMAIN}/${USER}/.dovecot.sieve"
fi
echo "${DOMAIN}" >>/tmp/vhost.tmp
done < <(grep -v "^\s*$\|^\s*\#" /tmp/docker-mailserver/postfix-accounts.cf)
fi
[[ -n ${RELAY_HOST} ]] && _populate_relayhost_map
if [[ -f /etc/postfix/sasl_passwd ]]
then
chown root:root /etc/postfix/sasl_passwd
chmod 0600 /etc/postfix/sasl_passwd
fi
if [[ -f postfix-virtual.cf ]]
then
# regenerate postfix aliases
: >/etc/postfix/virtual
: >/etc/postfix/regexp
if [[ -f /tmp/docker-mailserver/postfix-virtual.cf ]]
then
cp -f /tmp/docker-mailserver/postfix-virtual.cf /etc/postfix/virtual
# the `to` seems to be important; don't delete it
# shellcheck disable=SC2034
while read -r FROM TO
do
UNAME=$(echo "${FROM}" | cut -d @ -f1)
DOMAIN=$(echo "${FROM}" | cut -d @ -f2)
# if they are equal it means the line looks like: "user1 other@domain.tld"
[ "${UNAME}" != "${DOMAIN}" ] && echo "${DOMAIN}" >>/tmp/vhost.tmp
done < <(grep -v "^\s*$\|^\s*\#" /tmp/docker-mailserver/postfix-virtual.cf || true)
fi
if [[ -f /tmp/docker-mailserver/postfix-regexp.cf ]]
then
cp -f /tmp/docker-mailserver/postfix-regexp.cf /etc/postfix/regexp
sed -i -e '/^virtual_alias_maps/{
s/ regexp:.*//
s/$/ regexp:\/etc\/postfix\/regexp/
}' /etc/postfix/main.cf
fi
fi
if [[ -f /tmp/vhost.tmp ]]
then
# shellcheck disable=SC2002
cat /tmp/vhost.tmp | sort | uniq >/etc/postfix/vhost && rm /tmp/vhost.tmp
fi
if [[ $(find /var/mail -maxdepth 3 -a \( \! -user 5000 -o \! -group 5000 \) | grep -c .) -ne 0 ]]
then
chown -R 5000:5000 /var/mail
fi
supervisorctl restart postfix
# prevent restart of dovecot when smtp_only=1
[[ ${SMTP_ONLY} -ne 1 ]] && supervisorctl restart dovecot
) 200<postfix-accounts.cf # end lock
fi
sleep 1
done