284 lines
9.4 KiB
Bash
Executable File
284 lines
9.4 KiB
Bash
Executable File
#! /bin/bash
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# shellcheck source=./helper-functions.sh
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. /usr/local/bin/helper-functions.sh
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LOG_DATE=$(date +"%Y-%m-%d %H:%M:%S ")
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_notify 'task' "${LOG_DATE} Start check-for-changes script."
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SCRIPT_NAME="$(basename "$0")"
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# ? ––––––––––––––––––––––––––––––––––––––––––––– Checks
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cd /tmp/docker-mailserver || exit 1
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# check postfix-accounts.cf exist else break
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if [[ ! -f postfix-accounts.cf ]]
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then
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_notify 'inf' "${LOG_DATE} postfix-accounts.cf is missing! This should not run! Exit!"
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exit 0
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fi
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# verify checksum file exists; must be prepared by start-mailserver.sh
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if [[ ! -f ${CHKSUM_FILE} ]]
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then
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_notify 'err' "${LOG_DATE} ${CHKSUM_FILE} is missing! Start script failed? Exit!"
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exit 0
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fi
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# ? --------------------------------------------- Actual script begins
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# determine postmaster address, duplicated from start-mailserver.sh
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# this script previously didn't work when POSTMASTER_ADDRESS was empty
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if [[ -n ${OVERRIDE_HOSTNAME} ]]
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then
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DOMAINNAME="${OVERRIDE_HOSTNAME#*.}"
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else
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DOMAINNAME="$(hostname -d)"
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fi
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PM_ADDRESS="${POSTMASTER_ADDRESS:=postmaster@${DOMAINNAME}}"
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_notify 'inf' "${LOG_DATE} Using postmaster address ${PM_ADDRESS}"
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sleep 10
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CMP_RESULT=
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LAST_CMP_RESULT=
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while true
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do
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LOG_DATE=$(date +"%Y-%m-%d %H:%M:%S ")
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# Lock configuration while working
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create_lock "${SCRIPT_NAME}"
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# get chksum and check it, no need to lock config yet
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_monitored_files_checksums >"${CHKSUM_FILE}.new"
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CMP_RESULT=$(cmp -- "${CHKSUM_FILE}" "${CHKSUM_FILE}.new")
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if [[ -n "${CMP_RESULT}" ]] # If there is a difference between checksum files
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then
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# If the current run's CMP_RESULT is equal to the LAST_CMP_RESULT, changes have settled and we can safely proceed
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# This prevents multiple restarts of postfix from happening all at once and causing problems or delays
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if [[ "${CMP_RESULT}" == "${LAST_CMP_RESULT}" ]]
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then
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_notify 'inf' "${LOG_DATE} Changes to checksum files settled"
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CHANGED=$(grep -Fxvf "${CHKSUM_FILE}" "${CHKSUM_FILE}.new" | sed 's/^[^ ]\+ //')
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WAIT_FOR_PIDS=()
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# Bug alert! This overwrites the alias set by start-mailserver.sh
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# Take care that changes in one script are propagated to the other
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# ! NEEDS FIX -----------------------------------------
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# TODO FIX --------------------------------------------
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# ! NEEDS EXTENSIONS ----------------------------------
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# TODO Perform updates below conditionally too --------
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# Also note that changes are performed in place and are not atomic
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# We should fix that and write to temporary files, stop, swap and start
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for FILE in ${CHANGED}
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do
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case "${FILE}" in
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"/etc/letsencrypt/acme.json" )
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{
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for CERTDOMAIN in ${SSL_DOMAIN} ${HOSTNAME} ${DOMAINNAME}
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do
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_extract_certs_from_acme "${CERTDOMAIN}" && break
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done
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} &
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WAIT_FOR_PIDS+=($!)
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;;
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* )
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_notify 'warn' 'File not found for certificate in check_for_changes.sh'
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;;
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esac
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done
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# regenerate postix aliases
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{
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echo "root: ${PM_ADDRESS}" >/etc/aliases
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if [[ -f /tmp/docker-mailserver/postfix-aliases.cf ]]
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then
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cat /tmp/docker-mailserver/postfix-aliases.cf >>/etc/aliases
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fi
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postalias /etc/aliases
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} &
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WAIT_FOR_PIDS+=($!)
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# regenerate postfix accounts
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{
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: >/etc/postfix/vmailbox
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: >/etc/dovecot/userdb
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} &
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WAIT_FOR_PIDS+=($!)
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if [[ -f /tmp/docker-mailserver/postfix-accounts.cf ]] && [[ ${ENABLE_LDAP} -ne 1 ]]
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then
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sed -i 's/\r//g' /tmp/docker-mailserver/postfix-accounts.cf
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echo "# WARNING: this file is auto-generated. Modify config/postfix-accounts.cf to edit user list." >/etc/postfix/vmailbox
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# Checking that /tmp/docker-mailserver/postfix-accounts.cf ends with a newline
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# shellcheck disable=SC1003
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sed -i -e '$a\' /tmp/docker-mailserver/postfix-accounts.cf
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chown dovecot:dovecot /etc/dovecot/userdb
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chmod 640 /etc/dovecot/userdb
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sed -i -e '/\!include auth-ldap\.conf\.ext/s/^/#/' /etc/dovecot/conf.d/10-auth.conf
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sed -i -e '/\!include auth-passwdfile\.inc/s/^#//' /etc/dovecot/conf.d/10-auth.conf
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# rebuild relay host
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if [[ -n ${RELAY_HOST} ]]
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then
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# keep old config
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: >/etc/postfix/sasl_passwd
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if [[ -n ${SASL_PASSWD} ]]
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then
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echo "${SASL_PASSWD}" >>/etc/postfix/sasl_passwd
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fi
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# add domain-specific auth from config file
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if [[ -f /tmp/docker-mailserver/postfix-sasl-password.cf ]]
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then
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while read -r LINE
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do
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if ! grep -q -e "\s*#" <<< "${LINE}"
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then
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echo "${LINE}" >>/etc/postfix/sasl_passwd
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fi
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done < <(grep -v "^\s*$\|^\s*\#" /tmp/docker-mailserver/postfix-sasl-password.cf || true)
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fi
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# add default relay
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if [[ -n "${RELAY_USER}" ]] && [[ -n "${RELAY_PASSWORD}" ]]
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then
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echo "[${RELAY_HOST}]:${RELAY_PORT} ${RELAY_USER}:${RELAY_PASSWORD}" >>/etc/postfix/sasl_passwd
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fi
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fi
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# creating users ; 'pass' is encrypted
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# comments and empty lines are ignored
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while IFS=$'|' read -r LOGIN PASS USER_ATTRIBUTES
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do
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USER=$(echo "${LOGIN}" | cut -d @ -f1)
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DOMAIN=$(echo "${LOGIN}" | cut -d @ -f2)
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# test if user has a defined quota
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if [[ -f /tmp/docker-mailserver/dovecot-quotas.cf ]]
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then
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declare -a USER_QUOTA
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IFS=':' ; read -r -a USER_QUOTA < <(grep "${USER}@${DOMAIN}:" -i /tmp/docker-mailserver/dovecot-quotas.cf)
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unset IFS
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[[ ${#USER_QUOTA[@]} -eq 2 ]] && USER_ATTRIBUTES="${USER_ATTRIBUTES} userdb_quota_rule=*:bytes=${USER_QUOTA[1]}"
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fi
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echo "${LOGIN} ${DOMAIN}/${USER}/" >>/etc/postfix/vmailbox
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# user database for dovecot has the following format:
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# user:password:uid:gid:(gecos):home:(shell):extra_fields
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# example :
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# ${LOGIN}:${PASS}:5000:5000::/var/mail/${DOMAIN}/${USER}::userdb_mail=maildir:/var/mail/${DOMAIN}/${USER}
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echo "${LOGIN}:${PASS}:5000:5000::/var/mail/${DOMAIN}/${USER}::${USER_ATTRIBUTES}" >>/etc/dovecot/userdb
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mkdir -p "/var/mail/${DOMAIN}/${USER}"
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if [[ -e /tmp/docker-mailserver/${LOGIN}.dovecot.sieve ]]
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then
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cp "/tmp/docker-mailserver/${LOGIN}.dovecot.sieve" "/var/mail/${DOMAIN}/${USER}/.dovecot.sieve"
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fi
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echo "${DOMAIN}" >>/tmp/vhost.tmp
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done < <(grep -v "^\s*$\|^\s*\#" /tmp/docker-mailserver/postfix-accounts.cf)
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fi
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if [[ -n ${RELAY_HOST} ]]
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then
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_populate_relayhost_map &
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WAIT_FOR_PIDS+=($!)
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fi
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if [[ -f /etc/postfix/sasl_passwd ]]
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then
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{
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chown root:root /etc/postfix/sasl_passwd
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chmod 0600 /etc/postfix/sasl_passwd
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} &
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WAIT_FOR_PIDS+=($!)
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fi
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if [[ -f postfix-virtual.cf ]]
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then
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# regenerate postfix aliases
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: >/etc/postfix/virtual
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: >/etc/postfix/regexp
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if [[ -f /tmp/docker-mailserver/postfix-virtual.cf ]]
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then
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cp -f /tmp/docker-mailserver/postfix-virtual.cf /etc/postfix/virtual
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# the `to` seems to be important; don't delete it
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# shellcheck disable=SC2034
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while read -r FROM TO
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do
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UNAME=$(echo "${FROM}" | cut -d @ -f1)
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DOMAIN=$(echo "${FROM}" | cut -d @ -f2)
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# if they are equal it means the line looks like: "user1 other@domain.tld"
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[ "${UNAME}" != "${DOMAIN}" ] && echo "${DOMAIN}" >>/tmp/vhost.tmp
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done < <(grep -v "^\s*$\|^\s*\#" /tmp/docker-mailserver/postfix-virtual.cf || true)
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fi
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if [[ -f /tmp/docker-mailserver/postfix-regexp.cf ]]
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then
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cp -f /tmp/docker-mailserver/postfix-regexp.cf /etc/postfix/regexp
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sed -i -e '/^virtual_alias_maps/{
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s/ regexp:.*//
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s/$/ regexp:\/etc\/postfix\/regexp/
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}' /etc/postfix/main.cf
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fi
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fi
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# shellcheck disable=SC2044
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for USER_MAIL_LOCATION in $(find /var/mail -maxdepth 3 -a \( \! -user 5000 -o \! -group 5000 \)); do
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chown -R 5000:5000 "${USER_MAIL_LOCATION}" &
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WAIT_FOR_PIDS+=($!)
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done
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# relies on if [[ -f postfix-virtual.cf ]] block
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if [[ -f /tmp/vhost.tmp ]]
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then
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sort < /tmp/vhost.tmp | uniq >/etc/postfix/vhost
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rm /tmp/vhost.tmp
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fi
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# shellcheck disable=SC2086
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wait ${WAIT_FOR_PIDS[*]}
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supervisorctl restart postfix &
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wait $!
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# prevent restart of dovecot when smtp_only=1
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if [[ ${SMTP_ONLY} -ne 1 ]]
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then
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supervisorctl restart dovecot &
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wait $!
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fi
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LAST_CMP_RESULT=
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CMP_RESULT=
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# mark changes as applied
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mv "${CHKSUM_FILE}.new" "${CHKSUM_FILE}"
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else # The files differ...
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_notify 'inf' "${LOG_DATE} Changes to checksum files detected... Ensuring changes have settled before proceeding..."
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LAST_CMP_RESULT="${CMP_RESULT}"
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sleep 5 # The longer the sleep here, the more time there is for users to make changes before a full restart
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fi
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else # Checksum files don't differ
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LAST_CMP_RESULT=
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fi
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remove_lock "${SCRIPT_NAME}"
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done
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exit 0
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