docker-mailserver/target/check-for-changes.sh

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#!/bin/bash
# create date for log output
log_date=$(date +"%Y-%m-%d %H:%M:%S ")
echo "${log_date} Start check-for-changes script."
# change directory
cd /tmp/docker-mailserver
# 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
CHKSUM_FILE=/tmp/docker-mailserver-config-chksum
if [ ! -f $CHKSUM_FILE ]; then
echo "${log_date} ${CHKSUM_FILE} is missing! Start script failed? Exit!"
exit
fi
# Determine postmaster address, duplicated from start-mailserver.sh
# This script previously didn't work when POSTMASTER_ADDRESS was empty
if [[ -n "${OVERRIDE_HOSTNAME}" ]]; then
DOMAINNAME=$(echo "${OVERRIDE_HOSTNAME}" | sed s/[^.]*.//)
else
DOMAINNAME="$(hostname -d)"
fi
PM_ADDRESS="${POSTMASTER_ADDRESS:=postmaster@${DOMAINNAME}}"
echo "${log_date} Using postmaster address ${PM_ADDRESS}"
# Create an array of files to monitor, must be the same as in start-mailserver.sh
declare -a cf_files=()
for file in postfix-accounts.cf postfix-virtual.cf postfix-aliases.cf; do
[ -f "$file" ] && cf_files+=("$file")
done
# Wait to make sure server is up before we start
# Plus the files have just been generated, no hurry to process changes
sleep 20
# Run forever
while true; do
# recreate logdate
log_date=$(date +"%Y-%m-%d %H:%M:%S ")
# Get chksum and check it.
chksum=$(sha512sum -c --ignore-missing $CHKSUM_FILE)
if [[ $chksum == *"FAIL"* ]]; then
echo "${log_date} Change detected"
# Bug alert! This overwrites the alias set by start-mailserver.sh
# Take care that changes in one script are propagated to the other
# 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
#regen postix aliases.
echo "root: ${PM_ADDRESS}" > /etc/aliases
if [ -f /tmp/docker-mailserver/postfix-aliases.cf ]; then
cat /tmp/docker-mailserver/postfix-aliases.cf>>/etc/aliases
fi
postalias /etc/aliases
#regen postfix accounts.
echo -n > /etc/postfix/vmailbox
echo -n > /etc/dovecot/userdb
if [ -f /tmp/docker-mailserver/postfix-accounts.cf -a "$ENABLE_LDAP" != 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
sed -i -e '$a\' /tmp/docker-mailserver/postfix-accounts.cf
chown dovecot:dovecot /etc/dovecot/userdb
chmod 640 /etc/dovecot/userdb
sed -i -e '/\!include auth-ldap\.conf\.ext/s/^/#/' /etc/dovecot/conf.d/10-auth.conf
sed -i -e '/\!include auth-passwdfile\.inc/s/^#//' /etc/dovecot/conf.d/10-auth.conf
# rebuild relay host
if [ ! -z "$RELAY_HOST" ]; then
# keep old config
echo -n > /etc/postfix/sasl_passwd
echo -n > /etc/postfix/relayhost_map
if [ ! -z "$SASL_PASSWD" ]; then
echo "$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 line; do
if ! echo "$line" | grep -q -e "\s*#"; then
echo "$line" >> /etc/postfix/sasl_passwd
fi
done < /tmp/docker-mailserver/postfix-sasl-password.cf
fi
# add default relay
if [ ! -z "$RELAY_USER" ] && [ ! -z "$RELAY_PASSWORD" ]; then
echo "[$RELAY_HOST]:$RELAY_PORT $RELAY_USER:$RELAY_PASSWORD" >> /etc/postfix/sasl_passwd
fi
# add relay maps from file
if [ -f /tmp/docker-mailserver/postfix-relaymap.cf ]; then
while read line; do
if ! echo "$line" | grep -q -e "\s*#"; then
echo "$line" >> /etc/postfix/relayhost_map
fi
done < /tmp/docker-mailserver/postfix-relaymap.cf
fi
fi
# Creating users
# 'pass' is encrypted
# comments and empty lines are ignored
grep -v "^\s*$\|^\s*\#" /tmp/docker-mailserver/postfix-accounts.cf | while IFS=$'|' read login pass
do
# Setting variables for better readability
user=$(echo ${login} | cut -d @ -f1)
domain=$(echo ${login} | cut -d @ -f2)
# Let's go!
echo "${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}::" >> /etc/dovecot/userdb
mkdir -p /var/mail/${domain}
if [ ! -d "/var/mail/${domain}/${user}" ]; then
maildirmake.dovecot "/var/mail/${domain}/${user}"
maildirmake.dovecot "/var/mail/${domain}/${user}/.Sent"
maildirmake.dovecot "/var/mail/${domain}/${user}/.Trash"
maildirmake.dovecot "/var/mail/${domain}/${user}/.Drafts"
echo -e "INBOX\nSent\nTrash\nDrafts" >> "/var/mail/${domain}/${user}/subscriptions"
touch "/var/mail/${domain}/${user}/.Sent/maildirfolder"
fi
# Copy user provided sieve file, if present
test -e /tmp/docker-mailserver/${login}.dovecot.sieve && cp /tmp/docker-mailserver/${login}.dovecot.sieve /var/mail/${domain}/${user}/.dovecot.sieve
echo ${domain} >> /tmp/vhost.tmp
# add domains to relayhost_map
if [ ! -z "$RELAY_HOST" ]; then
if ! grep -q -e "^@${domain}\s" /etc/postfix/relayhost_map; then
echo "@${domain} [$RELAY_HOST]:$RELAY_PORT" >> /etc/postfix/relayhost_map
fi
fi
done
fi
if [ -f /etc/postfix/sasl_passwd ]; then
chown root:root /etc/postfix/sasl_passwd
chmod 0600 /etc/postfix/sasl_passwd
fi
if [ -f /etc/postfix/relayhost_map ]; then
chown root:root /etc/postfix/relayhost_map
chmod 0600 /etc/postfix/relayhost_map
fi
if [ -f postfix-virtual.cf ]; then
# regen postfix aliases
echo -n > /etc/postfix/virtual
echo -n > /etc/postfix/regexp
if [ -f /tmp/docker-mailserver/postfix-virtual.cf ]; then
# Copying virtual file
cp -f /tmp/docker-mailserver/postfix-virtual.cf /etc/postfix/virtual
while read from to
do
# Setting variables for better readability
uname=$(echo ${from} | cut -d @ -f1)
domain=$(echo ${from} | cut -d @ -f2)
# if they are equal it means the line looks like: "user1 other@domain.tld"
test "$uname" != "$domain" && echo ${domain} >> /tmp/vhost.tmp
done < /tmp/docker-mailserver/postfix-virtual.cf
fi
if [ -f /tmp/docker-mailserver/postfix-regexp.cf ]; then
# Copying regexp alias file
cp -f /tmp/docker-mailserver/postfix-regexp.cf /etc/postfix/regexp
sed -i -e '/^virtual_alias_maps/{
s/ regexp:.*//
s/$/ regexp:\/etc\/postfix\/regexp/
}' /etc/postfix/main.cf
fi
fi
# Set vhost
if [ -f /tmp/vhost.tmp ]; then
cat /tmp/vhost.tmp | sort | uniq > /etc/postfix/vhost && rm /tmp/vhost.tmp
fi
# Set right new if needed
if [ `find /var/mail -maxdepth 3 -a \( \! -user 5000 -o \! -group 5000 \) | grep -c .` != 0 ]; then
chown -R 5000:5000 /var/mail
fi
# Restart of the postfix
supervisorctl restart postfix
# Prevent restart of dovecot when smtp_only=1
if [ ! $SMTP_ONLY = 1 ]; then
supervisorctl restart dovecot
fi
echo "${log_date} Update checksum"
sha512sum ${cf_files[@]/#/--tag } >$CHKSUM_FILE
fi
sleep 1
done