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#!/usr/bin/perl -T -w use strict; use warnings; use re 'taint'; my $PREFIX = '/usr'; # substituted at 'make' time my $DEF_RULES_DIR = '/usr/share/spamassassin'; # substituted at 'make' time my $LOCAL_RULES_DIR = '/etc/spamassassin'; # substituted at 'make' time my $LOCAL_STATE_DIR = '/var/lib/spamassassin'; # substituted at 'make' time use lib '/usr/share/perl5'; # substituted at 'make' time use Errno qw(EBADF); use File::Spec; use Config; BEGIN { # see comments in "spamassassin.raw" for doco my @bin = File::Spec->splitpath($0); my $bin = ($bin[0] ? File::Spec->catpath(@bin[0..1], '') : $bin[1]) || File::Spec->curdir; if (-e $bin.'/lib/Mail/SpamAssassin.pm' || !-e '/usr/share/perl5/Mail/SpamAssassin.pm' ) { my $searchrelative; if ($searchrelative && $bin eq '../' && -e '../blib/lib/Mail/SpamAssassin.pm') { unshift ( @INC, '../blib/lib' ); } else { foreach ( qw(lib ../lib/site_perl ../lib/spamassassin ../share/spamassassin/lib)) { my $dir = File::Spec->catdir( $bin, split ( '/', $_ ) ); if ( -f File::Spec->catfile( $dir, "Mail", "SpamAssassin.pm" ) ) { unshift ( @INC, $dir ); last; } } } } } sub usage { die " usage: sa-awl [--clean] [--min n] [dbfile] "; } use Fcntl; use Getopt::Long; use POSIX qw(locale_h setsid sigprocmask _exit); POSIX::setlocale(LC_TIME,'C'); our ( $opt_clean, $opt_min, $opt_help ); GetOptions( 'clean' => \$opt_clean, 'min:i' => \$opt_min, 'help' => \$opt_help ) or usage(); $opt_help and usage(); $opt_min ||= 2; BEGIN { @AnyDBM_File::ISA = qw(DB_File GDBM_File NDBM_File SDBM_File); } use AnyDBM_File ; my $db; if ($#ARGV == -1) { $db = $ENV{HOME}."/.spamassassin/auto-whitelist"; } else { $db = $ARGV[0]; } my %h; if ($opt_clean) { tie %h, "AnyDBM_File",$db, O_RDWR,0600 or die "Cannot open r/w file $db: $!\n"; } else { tie %h, "AnyDBM_File",$db, O_RDONLY,0600 or die "Cannot open file $db: $!\n"; } if (!$opt_clean) { # just pretend to be cleaning while (my($key, $count) = each %h) { next if $key =~ /totscore$/; my $totscore = $h{"$key|totscore"}; next unless defined($totscore); printf("%8.1f %15s -- %s\n", $totscore/$count, sprintf("(%.1f/%d)",$totscore,$count), $key); } } else { # really do the cleaning for (;;) { my @delete_keys; my $more; while (my($key, $count) = each %h) { next if $key =~ /totscore$/; my $totscore = $h{"$key|totscore"}; next unless defined($totscore); next if $count >= $opt_min; printf("cleaning: %8.1f %15s -- %s\n", $totscore/$count, sprintf("(%.1f/%d)",$totscore,$count), $key); # according to perlfunc man page: # If you add or delete a hash's elements while iterating over it, # entries may be skipped or duplicated -- so don't do that. # Exception: It is always safe to delete the item most recently # returned by each(), delete $h{$key}; # this is safe push(@delete_keys, "$key|totscore"); # this should be postponed # see Bug 6793 - reduce sa-awl memory usage if (@delete_keys >= 10000) { $more = 1; last } # avoid worst case } delete $h{$_} for @delete_keys; last if !$more; } } untie %h; =head1 NAME sa-awl - examine and manipulate SpamAssassin's auto-whitelist db =head1 SYNOPSIS B<sa-awl> [--clean] [--min n] [dbfile] =head1 DESCRIPTION Check or clean a SpamAssassin auto-whitelist (AWL) database file. The name of the file is specified after any options, as C<dbfile>. The default is C<$HOME/.spamassassin/auto-whitelist>. =head1 OPTIONS =over 4 =item --clean Clean out infrequently-used AWL entries. The C<--min> switch can be used to select the threshold at which entries are kept or deleted. =item --min n Select the threshold at which entries are kept or deleted when C<--clean> is used. The default is C<2>, so entries that have only been seen once are deleted. =back =head1 OUTPUT The output looks like this: AVG (TOTSCORE/COUNT) -- EMAIL|ip=IPBASE For example: 0.0 (0.0/7) -- dawson@example.com|ip=208.192 21.8 (43.7/2) -- mcdaniel_2s2000@example.com|ip=200.106 C<AVG> is the average score; C<TOTSCORE> is the total score of all mails seen so far; C<COUNT> is the number of messages seen from that sender; C<EMAIL> is the sender's email address, and C<IPBASE> is the B<AWL base IP address>. B<AWL base IP address> is a way to identify the sender's IP address they frequently send from, in an approximate way, but remaining hard for spammers to spoof. The algorithm is as follows: - take the last Received header that contains a public IP address -- namely one which is not in private, unrouted IP space. - chop off the last two octets, assuming that the user may be in an ISP's dynamic address pool. =cut
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