localmkpostfixvirtual



#!/bin/bash

# Generate virtual file for postfix
#
# Each user should have space-separated hints like "mailname1@ mailname2@gid1 mailname3@gid2"
# stored in the "Other" field (using chfn).
#
# The user of each mailgroup should have hints like "@domain1 @domain2" for each hosted domain
# stored in the "Other" field (using chfn).

#TODO: reuse getent requests (drastically improves speed with multiple domains)

function get_fullname_field()   { getent passwd $1 | awk -F: '{print $5}' | awk -F, '{print $1}'; }
function get_roomnumber_field() { getent passwd $1 | awk -F: '{print $5}' | awk -F, '{print $2}'; }
function get_other_field()  { getent passwd $1 | awk -F: '{print $5}' | awk -F, '{print $5}'; }
function get_groups()       { groups $1 | sed -e 's/^.*: //' -e "s/\( \+\|^\)$1\( \+\|$\)/\1/"; }
function get_domain()       { echo $1 | egrep "^@[\.[:alnum:]]+$" | sed -e 's/@//'; }
function get_account()      { echo $1 | egrep "^[\.[:alnum:]]+@($gid)?$" | sed -e 's/@.*//'; }

loop=""
for gid in $@; do
    for maildomainchunk in `get_other_field $gid`; do
        for maildomain in `get_domain $maildomainchunk`; do
            if [ $loop ]; then
                echo
                echo "##################################################################"
                echo
            fi
            loop=true
            echo "$maildomain VIRTUAL"
            echo "postmaster@$maildomain root"
            echo
            mailusers=""
            for mailgroup in `get_roomnumber_field $gid`; do
                mailusers="$mailusers `members $mailgroup`"
            done
#           for uid in `members $gid | sort`; do
            for uid in `echo $mailusers | tsort | uniq | sort`; do
                echo "# `get_fullname_field $uid` (`get_groups $uid`)"
                uid_seen=""
                for mailaccountchunk in `get_other_field $uid`; do
                    for mailaccount in `get_account $mailaccountchunk`; do
                        echo "$mailaccount@$maildomain $uid"
                        uid_seen=true
                    done
                done
                if [ ! $uid_seen ]; then
                    echo "#WARNING: No addresses for $uid"
                fi
                echo
            done
        done
    done
done