#!/bin/sh

# interface to add email address to postfix/courier-imap
# written and copyright by Mads Joergensen (software@mads.sulau.dk) 
# a hot summer day in spring 2004
# published under the GPL license (see: gpl.txt)
# Perl would had been a better choise of language tho, but 
# the script just evolved out of nowhere

# discard path
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin

# configuration options
# home basedir - no tailing slash
MAIL_BASE="/home/vmail"
POSTFIX_VIRTUAL="/usr/local/etc/postfix/virtual"
POSTFIX_VIRTUAL_MAPS="/usr/local/etc/postfix/virtual_mailbox_maps"
COURIER_USERDB="/usr/local/etc/userdb"
MAIL_UID=1003
MAIL_GID=1003

# usage - duh
if [ -z "$1" ]; then
    echo "Usage: ${0} <email address>"
    exit 1
fi

# split the email adresse - ugly yes couldent figure out how to 
# do it another way
USER=`echo "$1" | { IFS=@ read user domain; echo $user; }`
DOMAIN=`echo "$1" | { IFS=@ read user domain; echo $domain; }`
HOME="${MAIL_BASE}/${DOMAIN}/${USER}/"
POSTFIX_HOME="${DOMAIN}\/${USER}\/"

# check that the user does not exist
if [ ! -z "`grep -e "^$USER" $POSTFIX_VIRTUAL`" ]; then
    echo "User exists allready"
    exit
fi

# add user to postfix virtual
sed -i -e "s/^#$DOMAIN.*---$/&\\
$1                  $1/g" $POSTFIX_VIRTUAL

# add user to postfix virtual_mailbox_maps
sed -i -e "s/^#$DOMAIN.*---$/&\\
$1                  $POSTFIX_HOME/g" $POSTFIX_VIRTUAL_MAPS

# add user to courier
userdb -f ${COURIER_USERDB} "${1}" set home=$HOME mail=$HOME uid=${MAIL_UID} gid=${MAIL_GID}

# set the password
echo "Setting imap password"
userdbpw | userdb -f ${COURIER_USERDB} "${1}" set imappw

echo "Rebuilding files ..."

makeuserdb
postmap $POSTFIX_VIRTUAL_MAPS
postmap $POSTFIX_VIRTUAL

echo "Reloading postfix"

postfix reload

# send user a mail so postfix can create the user's homedir
echo "Welcome to ${DOMAIN}" | mail -s "welcome to ${DOMAIN}" ${1}

echo "Done"