localmkpostfixvirtual



#!/bin/bash
#
# /usr/local/sbin/localmkpostfixvirtual
# Copyright 2001-2002 Jonas Smedegaard <dr@jones.dk>
#
# $Id: localmkpostfixvirtual,v 1.19 2006-08-02 16:00:12 jonas Exp $
#
# Generate virtual file for postfix
#
# Hints are stored in the "Other" field (using chfn).
#
# Each user should have space-separated hints like this:
# "mailname1@ mailname2@mailgroup1 mailname3@mailgroup2 mailname4@maildomain7".
#
# The user of each mailgroup should have hints like "@domain1 @domain2"
# for each hosted maildomain.
#
# Generate virtual file like this:
#
#  # ( cd /etc/postfix && localmkpostfixvirtual > virtual.new && diff virtual virtual.new )
#
# ..and if the changes are correct, activate the new virtual file:
#
#  # ( cd /etc/postfix && mv virtual.new virtual && postmap virtual )
#
# Optional: Several mailgroups can be tied together (when amount of hints
# exceeds the limit of the "Other" field: List them all in
# "Office" or "roomnumber" field of primary mailgroup (include the
# primary mailgroup itself!).
#
# Optional: root can have hints like "postmaster@ hostmaster@ support@"
# for default accounts tied to the sysadmin (default: "postmaster@").
#
# Suggestion: Add mailgroup users like this:
# adduser --system --no-create-home --group --disabled-password <uid>
#
# TODO: reuse getent requests (drastically improves speed)
# TODO: Write command "members" as internal code
#

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|$maildomain)?$" | sed -e 's/@.*//'; }
function sort_u()       { for x in $@; do echo $x; done | sort -u; }

function print_accounts() {
    uid=$1
    maildomain=$2
    pre_text=$3
    post_fallback_text=$4

    test -n "$pre_text" && echo "$pre_text"
    uid_seen=""
    joker_seen=""
    for mailaccountchunk in `get_other_field $uid`; do
        for mailaccount in `get_account $mailaccountchunk`; do
            case $mailaccount in
                '+')
                if [ -z "$joker_seen" ]; then
                    echo "@$maildomain $uid"
                    joker_seen="$uid"
                else
                    echo "#WARNING: Catch-all for $maildomain already set to $joker_seen: `get_fullname_field $uid`"
                fi
                ;;
                *)
                echo "$mailaccount@$maildomain $uid"
                ;;
            esac
            uid_seen=1
        done
    done
    test -n "$post_fallback_text" -a -z "$uid_seen" && echo "$post_fallback_text"
    echo
}

loop=""
if [ $# -lt 1 ]; then
    mailgroups="`members maildomains`"
else
    mailgroups="$@"
fi
for mailgroup in $mailgroups; do
    for maildomainchunk in `get_other_field $mailgroup`; do
        for maildomain in `get_domain $maildomainchunk`; do
            if [ $loop ]; then
                echo
                echo "##################################################################"
                echo
            fi
            loop=true
            print_accounts root "$maildomain" "$maildomain VIRTUAL" "postmaster@$maildomain root"
            mailgroupowners=""
            mailusers=""
            mailgroupgroups="`get_roomnumber_field $mailgroup`"
            test -z "$mailgroupgroups" && mailgroupgroups="$mailgroup"
            for mailgroupgroup in $mailgroupgroups; do
                mailgroupowners="$mailgroupowners `members -p "$mailgroupgroup"`"
                mailusers="$mailusers `members -s "$mailgroupgroup"`"
            done
            # Do mailgroup owners (and don't warn if there's no addresses attached)
            for mailgroupowner in `sort_u $mailgroupowners`; do
                print_accounts $mailgroupowner "$maildomain" "# `get_fullname_field "$mailgroupowner"` (`get_groups "$mailgroupowner"`)" ""
            done
            # Do secondary mailgroup members
            for mailuser in `sort_u $mailusers`; do
                print_accounts "$mailuser" "$maildomain" "# `get_fullname_field "$mailuser"` (`get_groups "$mailuser"`)" "#WARNING: No addresses for $mailuser"
            done
        done
    done
done