perlmail-accept

   1 #! /usr/bin/perl
   2 #
   3 # $Id$
   4
   5 use vars qw($VERSION);
   6 $VERSION=do { my @r=(q$Revision$=~/\d+/g); sprintf "%d.".("%03d"x$#r),@r; };
   7 use strict;
   8 use warnings;
   9
  10
  11 INIT {
  12         require Sys::Syslog;
  13         Sys::Syslog::openlog("lacemail","pid","mail");
  14         my @syslogging_stack;
  15         sub syslogging_on_save
  16         {
  17                 push @syslogging_stack,$SIG{"__WARN__"},$SIG{"__DIE__" };
  18                 $SIG{"__WARN__"}=sub { Sys::Syslog::syslog("warning","WARN: %s",$_[0]); };      # disabled: print STDERR $_[0];
  19                 $SIG{"__DIE__" }=sub { Sys::Syslog::syslog("crit"   ,"DIE: %s" ,$_[0]); };
  20         }
  21         syslogging_on_save();
  22         sub syslogging_restore
  23         {
  24                 $SIG{"__DIE__" }=pop @syslogging_stack;
  25                 $SIG{"__WARN__"}=pop @syslogging_stack;
  26         }
  27         }
  28
  29
  30 use Mail::Audit qw(MAPS);
  31 require IO::Handle;
  32 use Carp qw(cluck confess);
  33 use POSIX qw(WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG WIFSTOPPED WSTOPSIG);
  34 require POSIX;  # for ceil
  35 use User::Utmp;
  36 require File::Basename;
  37 use Getopt::Long;
  38 require Mail::Address;
  39 require MIME::Words;
  40 require Cz::Cstocs;
  41 require HTML::Entities;
  42 require MIME::Head;
  43 require Lingua::EN::Squeeze;
  44 require Mail::Mailer;
  45 require HTTP::Cookies;
  46 require HTTP::Request;
  47 require LWP::UserAgent;
  48 use URI::Escape 'uri_escape';
  49 require WWW::SMS;
  50
  51
  52 my $HOME="/home/lace";
  53 my $Mail="$HOME/Mail";
  54 my @ValidUsers=qw(root lace short kratochvil _local);
  55 my $IdleMax=120;
  56 my $MaxBodySMS=0x1000;  # max bytes to pass to Lingua::EN::Squeeze
  57 my $SMSmailError='short+err@ucw.cz';
  58 my @SMSwebRcpt=qw(420 602 431329);
  59 my $SMSwebRcpt_username="lace2";
  60 my $SMScontact='<short@ucw.cz>';
  61
  62 our($Message,$Audit,@AuditStored,$store_ignore,$store_ignorenewmail,$store_profile,$DoBell);
  63 our(%audit_profile,@sms_squeezes,@alternates_host);     # imported
  64 my %alternates_host;    # from @alternates_host
  65
  66 # from RedHat "procmail-3.22-5"
  67 # /i should be only $procmailFROM_DAEMON but how it can hurt to /i all?
  68 our $procmailTO_        =qr'^((Original-)?(Resent-)?(To|Cc|Bcc)|(X-Envelope|Apparently(-Resent)?)-To):(.*[^-a-zA-Z0-9_.])?'mio;
  69 our $procmailTO         =qr'^((Original-)?(Resent-)?(To|Cc|Bcc)|(X-Envelope|Apparently(-Resent)?)-To):(.*[^a-zA-Z])?'mio;
  70 our $procmailFROM_DAEMON=qr'^(Mailing-List:|Precedence:.*(junk|bulk|list)|To: Multiple recipients of |(((Resent-)?(From|Sender)|X-Envelope-From):|>?From )([^>]*[^(.%@a-z0-9])?(Post(ma?(st(e?r)?|n)|office)|(send)?Mail(er)?|daemon|m(mdf|ajordomo)|n?uucp|LIST(SERV|proc)|NETSERV|o(wner|ps)|r(e(quest|sponse)|oot)|b(ounce|bs\.smtp)|echo|mirror|s(erv(ices?|er)|mtp(error)?|ystem)|A(dmin(istrator)?|MMGR|utoanswer))(([^).!:a-z0-9][-_a-z0-9]*)?[%@>        ][^<)]*(\(.*\).*)?)?$([^>]|$))'mio;
  71 our $procmailFROM_MAILER=qr'^(((Resent-)?(From|Sender)|X-Envelope-From):|>?From )[^>]*\b(Post(ma(st(er)?|n)|office)|(send)?Mail(er)?|daemon|mmdf|n?uucp|ops|r(esponse|oot)|(bbs\.)?smtp(error)?|s(erv(ices?|er)|ystem)|A(dmin(istrator)?|MMGR))(([^).!:a-z0-9][-_a-z0-9]*)?[%@>  ][^<)]*(\(.*\).*)?)?$([^>]|$)'mio;
  72 # perl-5.8.0 does not cope w/original FROM_MAILER on the third '?' character
  73 # Thus we did '([^>]*[^(.%@a-z0-9])?' -> '[^>]*\b', I hope it is somehow similiar
  74 # original FROM_MAILER  =qr'^(((Resent-)?(From|Sender)|X-Envelope-From):|>?From )([^>]*[^(.%@a-z0-9])?(Post(ma(st(er)?|n)|office)|(send)?Mail(er)?|daemon|mmdf|n?uucp|ops|r(esponse|oot)|(bbs\.)?smtp(error)?|s(erv(ices?|er)|ystem)|A(dmin(istrator)?|MMGR))(([^).!:a-z0-9][-_a-z0-9]*)?[%@>    ][^<)]*(\(.*\).*)?)?$([^>]|$)'mio;
  75
  76 my $opt_mode;
  77 my $opt_smstest;        # 1 or $smscount
  78 my $opt_idle;
  79 my $opt_dry;
  80
  81
  82 sub process;
  83
  84 sub stdin
  85 {
  86         syslogging_restore();   # This is more a debugging session
  87         local $/="\n";
  88         my $message="";
  89         local $_;
  90         while (<>) {
  91                 die "Invalid 'From ' line: $_" if $message eq "" && !/^From /;
  92                 if (/^From / && $message) {
  93                         process $message;
  94                         $message="";
  95                         }
  96                 $message.=$_;
  97                 }
  98         process $message if $message;
  99         exit 0;
 100 }
 101
 102 # FIXME: separate 'lacemail'-transfer together with lacemail-submit away
 103 sub inetd
 104 {
 105         die "Excessive arguments" if @ARGV;
 106
 107         IO::Handle::autoflush STDOUT 1;
 108
 109         while (1) {
 110                 local $/="\n";
 111                 my $length=<STDIN>;
 112                 confess "Unexpected EOF" if !defined $length;
 113                 confess "Missing EOL" if $length!~s/\n$//s;
 114                 exit 0 if $length eq "BYE";
 115                 confess "Unrecognized length: $length" if $length!~/^\d+$/;
 116                 my $message;
 117                 local $_;
 118                 $length==($_=read STDIN,$message,$length) or confess "Got $_ out of required $length bytes";
 119                 $length==length $message or confess "False read return ".length($message)." instead of $length";
 120                 {
 121                         local *STDOUT;
 122                         local *STDERR;
 123                         local $DoBell=0;
 124                         process $message;
 125                         if ($DoBell) {
 126                                 bell() or warn "Unable to BELL";
 127                                 }
 128                         }
 129                 print STDOUT "1";
 130                 }
 131         die "NOTREACHED";
 132 }
 133
 134 sub bell
 135 {
 136         local *BELL;
 137         open BELL,">/dev/tty11" or return 0;
 138         print BELL "\x07";
 139         close BELL or return 0;
 140         return 1;
 141 }
 142
 143 sub useridle
 144 {
 145         return 0 if ! -e $ENV{"HOME"}."/idle";
 146         my %valid_users=map(($_=>1),@ValidUsers);
 147         my($idlebest,$linebest);
 148         for my $utmp (User::Utmp::getut(),{ "ut_line"=>"psaux" }) {
 149                 local $_;
 150                 next if defined($_=$utmp->{"ut_type"}) && $_!=User::Utmp::USER_PROCESS;
 151                 next if defined($_=$utmp->{"ut_user"}) && !$valid_users{$_};
 152                 my $line="/dev/".$utmp->{"ut_line"};
 153                 my $atime=(stat $line)[8];
 154                 my $what="user \"".($utmp->{"ut_user"} || "<local>")."\", line \"$line\"";
 155                 warn "Unable to stat $what" and next if !$atime;
 156                 my $idle=time()-$atime;
 157                 warn "atime in future for $what" and next if $idle<0;
 158                 next if $idle>$IdleMax;
 159                 next if defined $idlebest && $idlebest<=$idle;
 160                 $idlebest=$idle;
 161                 $linebest=$line;
 162                 }
 163         return !wantarray() ? $idlebest : ($idlebest,$linebest);
 164 }
 165
 166 # return only the very (recursive) first part
 167 sub body_first
 168 {
 169         return $Audit if !$Audit->is_mime();
 170         my $first=$Audit;
 171         local $_;
 172         $first=$_ while $_=$first->parts(0);
 173         return $first;
 174 }
 175
 176 sub mimehead
 177 {
 178 my($part)=@_;
 179
 180         return $Audit->is_mime() ? $part->head()
 181                         : MIME::Head->new([ split "\n",$Audit->head()->as_string() ])
 182                         ;
 183 }
 184
 185 sub mimebody
 186 {
 187 my($part)=@_;
 188
 189         # be vary cautious here as most of $part methods will encode it!
 190         return join "",@{$Audit->body()} if !$Audit->is_mime();
 191         my $bodyhandle=$part->bodyhandle();
 192         # If MIME is corrupted we don't get bodyhandle() for this part
 193         # It may occur when "boundary" is specified by header but no such boundary is found in the body
 194         return $bodyhandle->as_string() if $bodyhandle;
 195         warn "MIME corrupted, adapting";
 196         return $part->body_as_string();
 197 }
 198
 199 sub mime_type
 200 {
 201 my($part)=@_;
 202
 203         return $Audit->is_mime() ? $part->effective_type() : mimehead($part)->mime_type();
 204 }
 205
 206 sub body_simple
 207 {
 208         my $first=body_first();
 209         my $r=mimebody($first);
 210         my $mime_type=mime_type($first);
 211            if ($mime_type eq "text/html") {
 212                 # HTML::FormatText just does a useless text layouts
 213                 # PerlIO::via::StripHTML probably needs PerlIO input (?)
 214                 $r=~s/<[^>]*>//gs;
 215                 $r=HTML::Entities::decode($r);
 216                 # FIXME: detect charset from <meta> tag: "Content-type: text/html; charset=<???>"
 217                 }
 218         elsif ($mime_type eq "application/pgp-encrypted"
 219                && (my $filename=mimehead($first)->mime_attr("Content-Disposition.filename"))
 220                ) {
 221                 # first part contains just "Version: 1" as of GnuPG v1.0.4 (GNU/Linux)
 222                 $r="pgp($filename)";
 223                 }
 224         if ((my $charset=mimehead($first)->mime_attr("Content-Type.charset"))) {
 225                 my $cstocs=Cz::Cstocs->new($charset,"ascii");
 226                 $r=&$cstocs($r) if $cstocs;     # charset may be unknown
 227                 }
 228         return $r;
 229 }
 230
 231 sub parts_linear
 232 {
 233 my($part)=@_;
 234
 235         return $Audit if !$part && !$Audit->is_mime();
 236         $part||=$Audit;
 237         # don't use '!$part->parts()' as even 0-parts-multiparts are still multiparts
 238         return $part if $part->bodyhandle();
 239         return map { (parts_linear($_)); } $part->parts();
 240 }
 241
 242 sub smsbuild
 243 {
 244 my($smsi,$smscount)=@_;
 245
 246         return "$smsi/$smscount:" if $smscount>1;
 247         return "";
 248 }
 249
 250 sub smslens
 251 {
 252 my($ignorenewmail,$smscount,%args)=@_;
 253
 254         return map({
 255                         my $l=160;
 256                         if (!$ignorenewmail) {  # send by mail
 257                                 $l-=length("Z emailu $SMSmailError: ");
 258                                 $l-=length(smsbuild($_,$smscount));
 259                                 }
 260                         else {  # send by web
 261                                 $l-=6;  # 154 is the max length before split; why?
 262                                 }
 263                         $l;
 264                         } (0..$smscount-1));
 265 }
 266
 267 sub smssend_web
 268 {
 269 my($squeezed,$smscount,@lens)=@_;
 270
 271         $smscount=POSIX::ceil($smscount/5);
 272         for my $smsi (0..$smscount-1) {
 273                 my $len=$lens[$smsi];
 274                 $squeezed=~/^.{0,$len}/s;
 275                 my $frag=$&;
 276                 $squeezed=$';
 277                 return 0 if 3!=@SMSwebRcpt;
 278                 local *F;
 279                 open F,"$HOME/priv/WWW-SMS-$SMSwebRcpt_username.pwd" or return 0;
 280                 my $pwd=<F>;
 281                 chomp $pwd;
 282                 close F;
 283                 my $sms=WWW::SMS->new(@SMSwebRcpt,$frag,"username"=>$SMSwebRcpt_username,"passwd"=>$pwd);
 284                 for ($sms->gateways("sorted"=>"reliability")) {
 285                         last if $sms->send($_);
 286                         Sys::Syslog::syslog("warning","Web SMS send failed: %s",$WWW::SMS::Error);
 287                         my $void=$WWW::SMS::Error;      # Prevent: Name "WWW::SMS::Error" used only once
 288                         }
 289                 }
 290         return 1;
 291 }
 292
 293 sub smssend_mail
 294 {
 295 my($squeezed,$smscount,@lens)=@_;
 296
 297         return 0;
 298 }
 299
 300 sub smssend
 301 {
 302 my($ignorenewmail,$smscount,%args)=@_;
 303
 304         my $text=audit_sms(
 305                         "subject"=>unmime($Audit->subject()),
 306                         "from"=>[ Mail::Address->parse(unmime($Audit->from())) ],
 307                         "body"=>substr(body_simple(),0,$MaxBodySMS*(1+0.25*$smscount)),
 308                         %args);
 309         my $texthead="";
 310         ($texthead,$text)=@$text if ref $text;
 311         do { print "$texthead\n$text\n"; return; } if $opt_smstest;
 312         my @lens=smslens($ignorenewmail,$smscount,%args);
 313         my $maxlen=0;
 314         $maxlen+=$_ for (@lens);
 315         my $squeezed;
 316         for my $squeeze (@sms_squeezes) {
 317                 local $_;
 318                  Lingua::EN::Squeeze::SqueezeControl($_)    if defined ($_=$squeeze->{"SqueezeControl"});
 319                 $Lingua::EN::Squeeze::SQZ_OPTIMIZE_LEVEL or 1;  # prevent: Name "$_" used only once: possible typo
 320                 $Lingua::EN::Squeeze::SQZ_OPTIMIZE_LEVEL=$_ if defined ($_=$squeeze->{"SQZ_OPTIMIZE_LEVEL"});
 321                 $squeezed=Lingua::EN::Squeeze::SqueezeText($text);
 322                 chomp $squeezed;
 323                 last if $maxlen>=length($texthead.$squeezed);
 324                 }
 325         $squeezed=substr $texthead.$squeezed,0,$maxlen; # strip if we passed thru last for() above
 326         my $recalclen=0;
 327         for ($smscount=0;$recalclen<length $squeezed;$smscount++) {
 328                 $recalclen+=$lens[$smscount];
 329                 }
 330         my $func=($ignorenewmail ? \&smssend_web : \&smssend_mail);
 331         &$func($squeezed,$smscount,@lens);
 332 }
 333
 334 sub smssend_tryall
 335 {
 336 my($ignorenewmail,@args)=@_;
 337
 338         return if !$opt_smstest && !$opt_idle && defined useridle();
 339         local $_;
 340         return $_ if                     $_=smssend(1,@args);   # web
 341         return $_ if !$ignorenewmail && ($_=smssend(0,@args));  # mail
 342         warn "Unable to SMSsend the mail";
 343         return 0;
 344 }
 345
 346 sub cut
 347 {
 348         local $_=$_[0];
 349         return "<???>" if !defined($_) || /^\s*$/s;
 350         s/^\s*//s;
 351         s/\s*$//s;
 352         return $_ if length($_)<128;
 353         return substr($_,0,128)."...";
 354 }
 355
 356 our $profile_eval_depth=0;
 357 # ($name || @$name)
 358 sub profile_eval
 359 {
 360 my($name)=@_;
 361
 362         die "Nesting profile: $name" if 0x10<=(local $profile_eval_depth=$profile_eval_depth+1);
 363         return @$name if ref $name;
 364         die "Profile not found: $name" if !exists $audit_profile{$name};
 365         my @this=@{$audit_profile{$name}};
 366         return (profile_eval($'),@this[1..$#this]) if $this[0] && $this[0]=~/^=/;
 367         return @this;
 368 }
 369
 370 sub address_show
 371 {
 372 my($text)=@_;
 373
 374         return join(",",map({ $_->name() or $_->address(); } Mail::Address->parse($text)));
 375 }
 376
 377 sub unmime
 378 {
 379 my($text)=@_;
 380
 381         return join "",map({
 382                         my $cstocs;
 383                         for (${$_}[1],"iso-8859-2") {
 384                                 last if $_ && ($cstocs=Cz::Cstocs->new($_,"ascii"));
 385                                 }
 386                         &$cstocs(${$_}[0]);
 387                         } MIME::Words::decode_mimewords($text));
 388 }
 389
 390 # $folder: "$folder; comment"
 391 # $profile as profile_eval($name)
 392 sub store
 393 {
 394 my($folder,$profile,%args)=@_;
 395
 396         $profile=$store_profile if !$profile;
 397         my %do=map({ (!/=/ ? ($_=>1) : ($`=>$')); } profile_eval($profile));
 398         Sys::Syslog::syslog("info","%s%s%s: %s: %s",
 399                                         (!$opt_dry ? "" : "--dry: "),
 400                                         (!$store_ignore ? "" : "IGNORED[$store_ignore]: "),
 401                                         map({ cut($_); } $folder,address_show(unmime($Audit->from())),unmime($Audit->subject())),
 402                                         )
 403                         if $do{"syslog"} || $opt_dry;
 404         $folder=~s/;.*$//s;
 405         $folder="$Mail/".$' if $folder=~/^=/;
 406         push @AuditStored,$folder if $do{"did"};
 407         return if $store_ignore || $opt_dry;
 408         $DoBell++ if $do{"bell"};
 409         write_message($folder);
 410         smssend_tryall $store_ignorenewmail,$do{"sms"},%args if $do{"sms"};
 411 }
 412
 413 our $did_last=0;
 414
 415 # no &$funcref=>did smth in this block
 416 # &$funcref,@funcargs
 417 sub did
 418 {
 419 my($funcref,@funcargs)=@_;
 420
 421         return @AuditStored!=$did_last if !$funcref;
 422         local $did_last=@AuditStored;
 423         &$funcref(@funcargs);
 424         return @AuditStored!=$did_last;
 425 }
 426
 427 # Never use Mail::Audit->store() as it will reformat MIME bodies and possibly corrupt OpenPGP!
 428 sub write_message
 429 {
 430 my($folder)=@_;
 431
 432         return if $opt_dry;
 433         local *F;
 434         open F,">>$folder" or do { warn "Append \"$folder\": $!"; return 0; };
 435         {
 436                 local $_;
 437                 ($_=Mail::Audit::audit_get_lock(\*F,$folder)) and do { warn "Lock \"$folder\": $!"; last; };
 438                 seek F,0,IO::Handle::SEEK_END or do { warn "Seek-end \"$folder\": $!"; last; };
 439                 # FIXME: Check for '^From ' to not to rely on our network peer
 440                 print F $Message or do { warn "Write to \"$folder\": $!"; last; };
 441                 do { print F "\n"; warn "Missing trailing newline, fixed"; } if $Message!~/\n$/s;
 442                 close F or do { warn "Close \"$folder\""; last; };
 443                 return 1;       # OK
 444                 }
 445         warn "MAIL DROPPED for folder: $folder";
 446         close F;
 447         return 0;       # failed
 448 }
 449
 450 sub process
 451 {
 452 my($message)=@_;
 453
 454         local $_=$_;
 455         my $save_=$_;
 456         local $Message=$message;
 457         local $Audit=Mail::Audit->new(
 458                         "emergency"=>"$Mail/emergency",
 459                         "data"=>[map("$_\n",split("\n",$message))],
 460                         "log"=>"$HOME/.lacemail.log",
 461                         "loglevel"=>99,
 462                         );
 463         local @AuditStored=();
 464         do { smssend 0,$opt_smstest; return; } if $opt_smstest;
 465         write_message("$Mail/input");
 466         audit();
 467         warn 'Corrupted $_, repaired' if defined($save_)!=defined($_) || (defined($_) && $save_ ne $_);
 468 }
 469
 470 # utility functions:
 471
 472 # return: true (error-message or "1") if is spam
 473 sub razor2
 474 {
 475         # razor-check has exit code 1 if NOT spam, code 0 if IS spam
 476         local *CHILD;
 477         local $SIG{"PIPE"}=sub { warn "razor2 gave me SIGPIPE: broken pipe"; };
 478         # prevent Razor2's: Can't call method "log" on unblessed reference at Razor2/Client/Agent.pm line 212.
 479         local $ENV{"HOME"}=$HOME;
 480         open CHILD,'|'
 481                                         .'('.'(razor-check 2>&1;echo >&3 $?)'
 482                                                         .'|sed "s/^/razor-check: /"'
 483                                                         .'|logger -t "lacemail['.$$.']" -p mail.crit'
 484                                                         .') 3>&1'
 485                                         .'|exit `cat`'
 486                         or return 0;
 487         print CHILD $Message;
 488         my $return;
 489         {
 490                 local $/=undef();
 491                 $return=<CHILD> || 1;
 492                 }
 493         close CHILD;
 494         return undef() if !WIFEXITED($?);
 495         return undef() if  WIFSIGNALED($?);
 496         return undef() if  WIFSTOPPED($?);
 497         return undef() if WEXITSTATUS($?);
 498         return $return; # is-spam
 499 }
 500
 501 # NOTE: returns undef() if !wantarray and the first header is unrecognized
 502 # Returns also hosts
 503 sub Received_for
 504 {
 505         my @r=();
 506         for my $hdr ($Audit->head->get("Received")) {
 507                 my($for)=($hdr=~/\bfor\s+\<?(\S+)\>?\b/);
 508                 return $for if !wantarray();
 509                 push @r,$for if $for;
 510                 my($from,$fromaddr)=($hdr=~/\bfrom\s+(?:(\S+)\b.*?)??\[((?:\d{1,3}\.){3}\d{1,3})\]/);
 511                 $from=$fromaddr if !defined $from;
 512                 push @r,"$from:$fromaddr" if $from;
 513                 }
 514         return @r;
 515 }
 516
 517 my %dnsbl_whitelist=map(($_=>1),(
 518                 "195.250.128.83"        # smtp3.vol.cz; 83.128.250.195.blackholes.five-ten-sg.com
 519                 ));
 520
 521 # Extended Mail::Audit::MAPS
 522 # $domain,$full,[$timeout]
 523 sub dnsbl
 524 {
 525 my($domain,$full,$timeout)=@_;
 526
 527         $timeout||=30;  # sec
 528         $Mail::Audit::MAPS::host=$domain;
 529         my @hosts=map({ s/^.*://; "[$_]"; }     # strip DNS part
 530                         grep({ /^([^:@]*):/ && !$alternates_host{$1}    # leave only foreign hosts
 531                                         && !$dnsbl_whitelist{$1}; } (Received_for()))
 532                         );
 533         splice @hosts,1 if !$full && @hosts;    # "&& @hosts" to prevent: WARN: splice() offset past end of array
 534         {
 535                 package My::Audit::Faked;
 536                 sub received { return @{$_[0]->{"received"}}; }
 537                 }
 538         my $self_faked={
 539                         "received"=>[@hosts],
 540                         };
 541         bless $self_faked,"My::Audit::Faked";
 542         return Mail::Audit::rblcheck($self_faked,$timeout);
 543 }
 544
 545 our %muttrc_pending=();
 546 sub muttrc
 547 {
 548 my($muttrc)=@_;
 549
 550         $muttrc||="$HOME/.muttrc";
 551         $muttrc=~s/^\~/$HOME/;
 552         do { warn "Looping muttrc, ignoring: $muttrc"; return (); } if $muttrc_pending{$muttrc};
 553         local $muttrc_pending{$muttrc}=1;
 554         local *MUTTRC;
 555         open MUTTRC,$muttrc or do { warn "open \"$muttrc\": $!"; return (); };
 556         local $/="\n";
 557         local $_;
 558         my @r=();
 559         # far emulation mutt/init.c/mutt_parse_rc_line()
 560         while (<MUTTRC>) {
 561                 s/^[\s;]*//s;
 562                 s/[#;].*$//s;
 563                 s/\s*$//s;
 564                 next if !/^(\S+)\s*/s;
 565                 if ($1 eq "source") {
 566                         $_=$';
 567                         do { warn "Wrong 'source' parameters at $muttrc:$.: $_"; next; } if !/^\S+$/;
 568                         push @r,muttrc($_);
 569                         next;
 570                         }
 571                 push @r,$_;
 572                 }
 573         close MUTTRC or warn "close \"$muttrc\": $!";
 574         return wantarray() ? @r : join("",map("$_\n",@r));
 575 }
 576
 577 my %mutteval_charmap=(          # WARNING: Don't use "" or "0" here, see below for "|| warn"!
 578                 '\\'=>"\\",
 579                 'r'=>"\r",
 580                 'n'=>"\n",
 581                 't'=>"\t",
 582                 'f'=>"\f",
 583                 'e'=>"\e",
 584                 );
 585 # mutt/init.c/mutt_extract_token()
 586 sub mutteval
 587 {
 588         local $_=$_[0];
 589         return $_ if !s/^"//;
 590         do { warn "Missing trailing quote in: $_"; return $_; } if !s/"$//;
 591         s/\\(.)/$mutteval_charmap{$1} || warn "Undefined '\\$1' sequence in: $_";/ges;
 592         return $_;
 593 }
 594
 595 sub muttrc_get
 596 {
 597 my(@headers)=@_;
 598
 599         my @r=map({ (ref $_ ? $_ : qr/^\s*set\s+\Q$_\E\s*=\s*(.*?)\s*$/si); } @headers);
 600         my %r=map(($_=>undef()),@r);
 601         for (muttrc()) {
 602                 for my $ritem (@r) {
 603                         /$ritem/si or next;
 604                         $r{$ritem}=mutteval $1;
 605                         }
 606                 }
 607         for my $var (grep { !defined($r{$_}) } @r) {
 608                 warn "Variable '$var' not found in muttrc";
 609                 return undef();
 610                 }
 611         return wantarray() ? %r : $r{$r[0]};
 612 }
 613
 614 sub muttrc_aliases
 615 {
 616         my %r=();
 617         for (muttrc()) {
 618                 next if !(my $key=(/^alias\s+(\S+)\s+/)[0]);
 619                 for my $addrobj (Mail::Address->parse($')) {
 620                         my $addr=$addrobj->address();
 621                         my $ref=\$r{"\L$addr"};
 622                         $$ref=$key if !$$ref;   # use always the first occurence to prefer nicks
 623                         }
 624                 }
 625         return %r;
 626 }
 627
 628 # FIXME: Unify
 629 # BEGIN lacemail-sendmail
 630 # return: Mail::Address instance or undef()
 631 sub parseone
 632 {
 633 my($line)=@_;
 634
 635         return undef() if !defined $line;
 636         my @r=Mail::Address->parse($line);
 637         warn "Got ".scalar(@r)." addresses while wanting just one; when parsing: $line" if 1!=@r;
 638         return $r[0];
 639 }
 640 # END lacemail-sendmail
 641
 642 # FIXME: host may get multiple recipients and thus not showing "for <...>"
 643 # FIXME: muttrc_get("from") is too strict
 644 sub store_muttrc_alternates
 645 {
 646 my($prefix,$profile)=@_;
 647
 648         my $alternates=muttrc_get("alternates") or return;
 649         my $alternatesre=qr/$alternates/si;
 650         my $From=muttrc_get("from") or return;
 651         my $Fromre=qr/^\Q$From\E$/si;
 652         my $Fromobj=parseone $From or return;
 653         warn "'From' \"$From\" not matched by 'alternates': $alternatesre"
 654                         if $From!~/$alternates/si;
 655         for my $for (reverse Received_for()) {
 656                 $for=~s/:.*$//; # strip IP address here
 657                 if ($Fromobj->user() ne "prog-mutt") {
 658                         next if lc($for) eq lc($From);
 659                         }
 660                 else {
 661                         my $forobj=parseone $for;
 662                         if ($forobj && $forobj->host()) {
 663                                 # it is 'for' our primary address
 664                                 next if lc($forobj->host()) eq lc($Fromobj->host());    # or 'return'? shouldn't matter
 665                                 }
 666                         }
 667                 next if !$alternates_host{lc $for} && $for!~/$alternatesre/si;
 668                 store "$prefix\L$for",($profile || []);
 669                 return;
 670                 }
 671 }
 672
 673 # $header: ref CODE
 674 # $header: !ref => $Audit->get($header)
 675 # $maybeaddress: qr/regex/i
 676 # $maybeaddress: "string"
 677 # $maybeaddress: "<Regexp:regex>"       # hack :-(
 678 # $maybeaddress: "<user@host>"
 679 # $maybeaddress: "<user@>"
 680 # $maybeaddress: "<@host>"
 681 sub _headercore
 682 {
 683 my($re,$justone,$header,$maybeaddress)=@_;
 684
 685         if (ref $header) {
 686                 $header=join(",",&$header());
 687                 }
 688         else {
 689                 $header=$Audit->get($header);
 690                 }
 691         return 0 if !$header;
 692         return $header=~/$maybeaddress/i if "Regexp" eq ref $maybeaddress;
 693         return $header=~/$re/i if !defined(my $want=($maybeaddress=~/^\<(.*)\>$/)[0]);
 694         my @parsed=Mail::Address->parse($header);
 695         warn "'mailto:' forbidden in pattern: $want" if $want=~/^\Qmailto:\E/;
 696         return 0 if $justone && 1!=@parsed;
 697         return grep {
 698                            if ($want=~/^Regexp:/)
 699                                 { $_->address()=~/$'/i; }
 700                         elsif ($want=~/\@$/)
 701                                 { $_->user()   =~/^(?:\Qmailto:\E)?\Q$`\E/i; }
 702                         elsif ($want=~/^\@/)
 703                                 { $_->host()   =~/^\Q$'\E/i; }
 704                         else
 705                                 { $_->address()=~/^(?:\Qmailto:\E)?\Q$want\E/i; }
 706                         } @parsed;
 707 }
 708
 709 sub headerhas
 710 {
 711 my($header,$substr)=@_;
 712
 713         return _headercore(qr/\Q$substr\E/i,0,$header,$substr);
 714 }
 715
 716 sub headeris
 717 {
 718 my($header,$string)=@_;
 719
 720         return _headercore(qr/\Q$string\E/i,1,$header,$string);
 721 }
 722
 723 # $header,%$map
 724 sub header_remap
 725 {
 726 my($header,$map)=@_;
 727
 728         my $text=$Audit->get($header);
 729         my $orig=$text;
 730         while (my($from,$to)=each(%$map)) {
 731                 $text=~s/\b\Q$from\E\b/$to/gsi;
 732                 }
 733         return if $text eq $orig;
 734         $Audit->put_header("X-LaceMail-header_remap-$header",$orig);
 735         $Audit->replace_header($header,$text);
 736 }
 737
 738
 739 # MAIN
 740
 741 my $basedir=File::Basename::dirname($0);
 742 $Getopt::Long::ignorecase=0;
 743 die "GetOptions error" if !Getopt::Long::GetOptions(
 744                   "inetd"    ,sub { $opt_mode=\&inetd; },
 745                   "stdin"    ,sub { $opt_mode=\&stdin; },
 746                   "dry"      ,\$opt_dry,
 747                   "smstest:s",sub { $opt_mode=\&stdin; $opt_smstest=($_[1] || 1); },
 748                   "idle!"    ,\$opt_idle,
 749                   "idletest" ,sub { syslogging_restore(); print((defined($_=useridle()) ? $_ : "<undef>")."\n"); exit 0; },
 750                   "muttrc"   ,sub { syslogging_restore(); print scalar muttrc(); exit 0; },
 751                 "d|basedir=s",\&basedir,
 752                 );
 753 # "Excessive arguments" checked in &inetd
 754 die "Missing mode" if !$opt_mode;
 755
 756 my $filenameMyAudit="$basedir/My-Audit.pm";
 757 open AUDIT,$filenameMyAudit or die "open \"$filenameMyAudit\": $!";
 758 {
 759         local $/=undef();
 760         eval <AUDIT> or die "eval \"$filenameMyAudit\": $@";
 761         audit_init();
 762         %alternates_host=map((lc($_)=>1),@alternates_host);
 763         }
 764 close AUDIT or warn "close \"$filenameMyAudit\": $!";
 765
 766 &$opt_mode();
 767 die "NOTREACHED";