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|
#!/usr/bin/perl -w
require 5;
use strict;
use Debconf::Client::ConfModule ':all';
use Carp;
use vars qw($reconfiguring $exim3conf $capb $default_configtype);
sub get_value($) {
my $key = shift;
my($code,$text) = get($key);
return $text if ($code == 0);
croak("Unable to fetch value for \"$key\" (debconf code $code)");
}
sub enqueue_question($$) {
my $priority = shift;
my $template = shift;
my($code,$text) = input($priority, $template);
if ($code && $code != 30) {
croak("Error asking question \"$template\" (debconf code $code)");
}
}
sub set_default($$) {
my $key = shift;
my $defaultvalue = shift;
my($code, $text) = get($key);
if ($code == 0) {
if ($text eq '') {
($code,$text) = set($key, $defaultvalue);
# Check $code...
}
}
else {
croak("Unable to fetch value for \"$key\" (debconf code $code)");
}
}
sub fetch_default($$) {
my $key = shift;
my $defaultcb = shift;
my($code, $text) = get($key);
if ($code == 0) {
if ($text eq '') {
my $defaultvalue = &$defaultcb;
if (defined($defaultvalue)) {
($code, $text) = set($key, $defaultvalue);
# Check $code...
}
}
}
else {
croak("Unable to fetch value for \"$key\" (debconf code $code)");
}
}
sub debug {
if ($ENV{EXIMCONF_DEBUG}) {
print STDERR "$0: @_\n";
}
}
sub exim3_readconfig {
my $filename = shift || "/etc/exim/exim.conf";
if (open(EXIMCONF, $filename)) {
my $config;
my $keyword;
scanmain:
while (<EXIMCONF>) {
chomp;
if (/^end\b/) {
last scanmain;
}
elsif (/^\s*([a-zA-z0-9_]+)\s*=\s*(.*)/) {
$keyword = $1;
my $value = $2;
while ($value =~ s/\\$//) {
my $nextline = <EXIMCONF>;
$value .= $nextline;
}
$config->{main}->{$keyword} = $value;
}
elsif (/^\s*no_([a-zA-Z0-9_]+)\s*$/) {
$config->{main}->{$keyword} = '';
}
}
for my $section (qw|transports directors routers|) {
scansection:
while (<EXIMCONF>) {
chomp;
if (/^end\b/) {
last scansection;
}
elsif (/^([a-zA-Z0-9_]+):\s*/) {
my $objname = $1;
objectline:
while (<EXIMCONF>) {
next if (/^\s*\#/ || !/\S/);
if (/^\s*([a-zA-Z0-9_]+)\s*=\s*(.*)/) {
my $propname = $1;
my $value = $2;
while ($value =~ s/\\$//) {
my $nextline = <EXIMCONF>;
$value .= $nextline;
}
$config->{$section}->{$objname}->{$propname} = $value;
}
else {
redo scansection;
}
}
}
}
}
close(EXIMCONF);
debug("Read Exim 3 config file $filename");
return $config;
}
else {
debug("Unable to read $filename: $!");
}
return undef;
}
version('2.0');
$capb = capb(''); # FIXME: Support backup
######################################################################
$reconfiguring = 1 if ($ARGV[0] eq 'reconfigure');
if (-f "/etc/exim4/exim4.conf" && !$reconfiguring) {
exit(0); # exit if exim4.conf already built and we are not explicitly reconfiguring
}
######################################################################
# Look for old Exim3 config file
if (-f "/etc/exim/exim.conf") {
enqueue_question("high", "exim/configconvert/question");
go();
my $convertresponse = get_value("exim/configconvert/question");
if ($convertresponse eq 'convert') {
enqueue_question("high", "exim/configconvert/convertnotice");
go();
system("/etc/init.d/exim4", "stop") if ($reconfiguring);
exit(0);
}
elsif ($convertresponse eq 'none') {
enqueue_question("high", "exim/configconvert/breakagenotice");
go();
exit(0);
}
elsif ($convertresponse eq 'createnew') {
# Do not read exim3 config file for defaults if exim4.conf has been created already
# The defaults should have been seen once by the user and stored in debconf anyway.
$exim3conf = exim3_readconfig() unless (-f "/etc/exim4/exim4.conf");
}
else {
die "exim/configconvert/question has an unrecognised answer: (\"$convertresponse\")\n";
}
}
######################################################################
# Ask eximconfig questions
# Grab the configtype from the old exim3 config file
# TRANSPORT(remote_smtp) does not exist ==> local
# ROUTER(lookuphost) exists ==> internet
# DIRECTOR(smart) exists ==> satellite
# DEFAULT ==> smarthost
fetch_default("exim/eximconfig/configtype", sub {
return "local" if (!defined($exim3conf->{transports}->{remote_smtp}));
return "internet" if (defined($exim3conf->{routers}->{lookuphost}));
return "satellite" if (defined($exim3conf->{directors}->{smart}));
return "smarthost"; });
enqueue_question("high", "exim/eximconfig/configtype");
go();
my $configtype = get_value("exim/eximconfig/configtype");
if ($configtype eq 'none') {
exit(0);
}
my $syshostname = $exim3conf->{main}->{primary_hostname} || $exim3conf->{main}->{qualify_domain} || `hostname --fqdn` || `hostname`;
my $visiblename;
if ($configtype eq 'satellite') {
set_default("exim/eximconfig/satellite_hostname", $syshostname);
enqueue_question("medium", "exim/eximconfig/satellite_hostname");
go();
$visiblename = get_value("exim/eximconfig/satellite_hostname");
}
else {
set_default("exim/eximconfig/visible_hostname", $syshostname);
enqueue_question("medium", "exim/eximconfig/visible_hostname");
go();
$visiblename = get_value("exim/eximconfig/visible_hostname");
}
if ($configtype eq 'internet' || $configtype eq 'smarthost') {
subst("exim/eximconfig/other_hostnames", "visiblename", $visiblename);
enqueue_question("high", "exim/eximconfig/other_hostnames");
# Downgrade these to medium since having them empty is likely to be reasonable?
enqueue_question("high", "exim/eximconfig/relay_domains");
enqueue_question("high", "exim/eximconfig/relay_nets");
}
my $ourdomain = $syshostname;
$ourdomain =~ s/^[^.][^.]*\.//;
if ($configtype eq 'satellite') {
# Exim 3 satellite configuration?
# Look for director called "smart"
# .. and new_address setting of "${local_part}@SOME_DOMAIN"
if ($exim3conf->{directors}->{smart} && $exim3conf->{directors}->{smart}->{new_address} =~ /^\${local_part}\@(.+)/) {
set_default("exim/eximconfig/readhost", $1);
}
else {
set_default("exim/eximconfig/readhost", $ourdomain);
}
# This is high priority even though it has a default, since $ourdomain
# is not necessarily "reasonable".. mail.$ourdomain would be equally "reasonable"
enqueue_question("high", "exim/eximconfig/readhost");
go();
my $readhost = get_value("exim/eximconfig/readhost");
set_default("exim/eximconfig/smarthost", $readhost);
enqueue_question("medium", "exim/eximconfig/smarthost");
}
elsif ($configtype eq 'smarthost') {
set_default("exim/eximconfig/smarthost", $ourdomain);
enqueue_question("high", "exim/eximconfig/smarthost");
}
enqueue_question("medium", "exim/eximconfig/overwrite_aliases");
enqueue_question("medium", "exim/daemon/permissions");
go();
if ($reconfiguring) {
system("/etc/init.d/exim4", "stop");
if (-f "/etc/exim4/exim4.conf") {
unlink("/etc/exim4/exim4.conf-reconfigure");
rename("/etc/exim4/exim4.conf", "/etc/exim4/exim4.conf-reconfigure");
}
}
exit(0);
|
