Bug#573141: exim4-config: update-exim4.conf strips required characters from dc_other_hostnames

[Andrew Schulman]

Package: exim4-config
Version: 4.71-3
Severity: normal


I have a regular expression that I want to put into MAIN_LOCAL_DOMAINS, so that it ends up as

MAIN_LOCAL_DOMAINS=@:localhost:5200-glenwood.net:^[^.]+\$

The backslash before the $ is required in order to make exim interpret the $ as an anchor and not as the start of a parameter expansion.  If the backslash isn't there, exim issues an error to the paniclog whenever mail is sent.

In order to set this up with update-exim4.conf, I tried setting

dc_other_hostnames='5200-glenwood.net;^[^.]+\\$'

But update-exim4.conf strips both backslashes away, so there's none in MAIN_LOCAL_DOMAINS.  So next I tried

dc_other_hostnames='5200-glenwood.net;^[^.]+\\\\$'

But then update-exim4.conf complains that

/usr/sbin/update-exim4.conf: non-ascii value 5200-glenwood.net;^[^.]+\$ read from /etc/exim4/update-exim4.conf.conf, sanitizing to 5200-glenwood.net;^[^.]+\$

So it seems that at present, it's not possible to do this with dc_other_domains.  As a workaround, I put the assignment of MAIN_LOCAL_DOMAINS directly into my exim configuration.  That works fine.

Thanks,
Andrew.

-- Package-specific info:
Exim version 4.71 #1 built 01-Jan-2010 13:39:44
Copyright (c) University of Cambridge, 1995 - 2007
Berkeley DB: Berkeley DB 4.8.26: (December 18, 2009)
Support for: crypteq iconv() IPv6 PAM Perl Expand_dlfunc GnuTLS move_frozen_messages Content_Scanning DKIM Old_Demime
Lookups: lsearch wildlsearch nwildlsearch iplsearch cdb dbm dbmnz dnsdb dsearch ldap ldapdn ldapm mysql nis nis0 passwd pgsql sqlite
Authenticators: cram_md5 cyrus_sasl dovecot plaintext spa
Routers: accept dnslookup ipliteral iplookup manualroute queryprogram redirect
Transports: appendfile/maildir/mailstore/mbx autoreply lmtp pipe smtp
Fixed never_users: 0
Size of off_t: 8
GnuTLS compile-time version: 2.8.5
GnuTLS runtime version: 2.8.3
Configuration file is /var/lib/exim4/config.autogenerated
# /etc/exim4/update-exim4.conf.conf
#
# Edit this file and /etc/mailname by hand and execute update-exim4.conf
# yourself or use 'dpkg-reconfigure exim4-config'
#
# Please note that this is _not_ a dpkg-conffile and that automatic changes
# to this file might happen. The code handling this will honor your local
# changes, so this is usually fine, but will break local schemes that mess
# around with multiple versions of the file.
#
# update-exim4.conf uses this file to determine variable values to replace
# the DEBCONFsomethingDEBCONF strings in the configuration template files.
#
# Most settings found in here do have corresponding questions in the
# Debconf configuration, but not all of them.
#
# This is a Debian specific file

# Cause exim to route mail sent to users at unqualified hostnames
# (e.g. andrex at helium) for local delivery.  We don't want it sent out
# via the smarthost, which will fail.  There are three ways to do this:
# (1) Set primary_hostname = helium.  This works for user at helium,
#     which is the usual case, since by default MAIN_LOCAL_DOMAINS
#     includes @, which is a synonym for primary_hostname.
# (2) Set MAIN_LOCAL_DOMAINS to include a regex for all unqualified
#     hostnames.  This will also then work for e.g. andrex at arsenic.
# (3) Add the above-mentioned regex to dc_other_hostnames.
#     update-exim4.conf will then propagate that to MAIN_LOCAL_DOMAINS.
dc_other_hostnames='5200-glenwood.net;^[^.]+\\$'

dc_eximconfig_configtype='smarthost'
dc_local_interfaces='127.0.0.1;192.168.1.2'
dc_readhost='5200-glenwood.net'
dc_relay_domains=''
dc_minimaldns='false'
dc_relay_nets='192.168.0.0/16'
dc_smarthost='smtp.comcast.net::587'
dc_localdelivery='maildir_home'

CFILEMODE='644'
dc_use_split_config='true'
dc_hide_mailname='false'
dc_mailname_in_oh='true'
mailname:5200-glenwood.net

-- System Information:
Distributor ID:	Ubuntu
Description:	Ubuntu 9.10
Release:	9.10
Codename:	karmicArchitecture: amd64 (x86_64)

Kernel: Linux 2.6.31-20-generic (SMP w/3 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages exim4-config depends on:
ii  adduser                    3.110ubuntu7  add and remove users and groups
ii  debconf [debconf-2.0]      1.5.27ubuntu2 Debian configuration management sy

exim4-config recommends no packages.

exim4-config suggests no packages.

-- debconf information:
  exim4/dc_other_hostnames: 5200-glenwood.net;^[^.]+\\$
  exim4/dc_eximconfig_configtype: mail sent by smarthost; received via SMTP or fetchmail
  exim4/no_config: true
  exim4/hide_mailname: false
  exim4/dc_postmaster:
  exim4/dc_smarthost: smtp.comcast.net::587
  exim4/dc_relay_domains:
  exim4/dc_relay_nets: 192.168.0.0/16
  exim4/mailname: 5200-glenwood.net
  exim4/dc_readhost: 5200-glenwood.net
  exim4/use_split_config: true
  exim4/exim4-config-title:
  exim4/dc_localdelivery: Maildir format in home directory
  exim4/dc_local_interfaces: 127.0.0.1;192.168.1.2
  exim4/dc_minimaldns: false