qmailadmin/filter.pl

   1 #!/usr/local/bin/perl
   2 # filter.pl
   3
   4 # read qmail module config
   5 $p = -l $0 ? readlink($0) : $0;
   6 $p =~ /^(.*)\/[^\/]+$/;
   7 open(CONF, "$1/config");
   8 while(<CONF>) {
   9         if (/^(\S+)=(.*)/) {
  10                 $config{$1} = $2;
  11                 }
  12         }
  13 close(CONF);
  14
  15 # read headers and body
  16 $fromline = <STDIN>;
  17 while(<STDIN>) {
  18         $headers .= $_;
  19         s/\r|\n//g;
  20         if (/^(\S+):\s+(.*)/) {
  21                 $header{lc($1)} = $2;
  22                 }
  23         elsif (!$_) { last; }
  24         }
  25 while(<STDIN>) {
  26         $body .= $_;
  27         }
  28
  29 # read the filter file
  30 if (open(FILTER, $ARGV[0])) {
  31         while(<FILTER>) {
  32                 s/\r|\n//g;
  33                 if (/^(\S+)\s+(\S+)\s+(\S+)\s+(.*)$/) {
  34                         push(@filter, [ $1, $2, $3, $4 ]);
  35                         }
  36                 elsif (/^(\S+)\s+(\S+)$/) {
  37                         push(@filter, [ $1, $2 ]);
  38                         }
  39                 }
  40         close(FILTER);
  41         }
  42 else {
  43         print STDERR "Filter file $ARGV[0] does not exist!\n";
  44         exit 1;
  45         }
  46
  47 # run the filter to find the first matching rule
  48 open(LOG, ">>$ARGV[0].log");
  49 foreach $f (@filter) {
  50         local $field = $f->[2] eq 'body' ? $body : $header{$f->[2]};
  51         local $st = 0;
  52         if ($f->[0] == 0) {
  53                 $st = ($field !~ /$f->[3]/i);
  54                 }
  55         elsif ($f->[0] == 1) {
  56                 $st = ($field =~ /$f->[3]/i);
  57                 }
  58         elsif ($f->[0] == 2) {
  59                 $st = 1;
  60                 }
  61         if ($st) {
  62                 # The rule matched!
  63                 if ($f->[1] =~ /^\//) {
  64                         # Write to a file
  65                         open(MAIL, ">>$f->[1]");
  66                         print MAIL $fromline;
  67                         }
  68                 else {
  69                         # Forward to another address
  70                         $f->[1] =~ s/\\/\\\\/g;
  71                         $f->[1] =~ s/'/\\'/g;
  72                         open(MAIL, "|$config{'qmail_dir'}/bin/qmail-inject '$f->[1]'");
  73                         }
  74                 print MAIL $headers;
  75                 print MAIL $body;
  76                 close(MAIL);
  77                 $now = localtime(time());
  78                 print LOG "[$now] [$header{'from'}] [",join(" ",@$f),"]\n";
  79                 last;
  80                 }
  81         }
  82