#-*- perl -*-
#
# Copyright (C) 2004,2005,2007,2008 Ken'ichi Fukamachi
# All rights reserved. This program is free software; you can
# redistribute it and/or modify it under the same terms as Perl itself.
#
# $FML: clamscan.pm,v 1.7 2007/01/16 11:59:54 fukachan Exp $
#
package FML::Filter::External::clamscan;
use strict;
use vars qw(@ISA @EXPORT @EXPORT_OK $AUTOLOAD);
use Carp;
=head1 NAME
FML::Filter::External::clamscan - clamav interface.
=head1 SYNOPSIS
use FML::Filter::External::clamscan;
my $ext_filter = new FML::Filter::External::clamscan;
$ext_filter->process($curproc, $msg);
=head1 DESCRIPTION
This module checks the specified message $msg by clamav.
=head1 METHODS
=head2 new()
constructor.
=cut
# Descriptions: constructor.
# Arguments: OBJ($self)
# Side Effects: none
# Return Value: OBJ
sub new
{
my ($self) = @_;
my ($type) = ref($self) || $self;
my $me = {};
return bless $me, $type;
}
=head2 process($curproc, $msg)
top level dispather.
It checks if the current message $msg looks a virus by clamav.
=cut
# Descriptions: check if the current message looks a virus.
# Arguments: OBJ($self) OBJ($curproc) OBJ($msg)
# Side Effects: none
# Return Value: NUM(1 or 0) (1 if spam)
sub process
{
my ($self, $curproc, $msg) = @_;
my $config = $curproc->config();
my $program = $config->{ path_clamscan } || '';
my $_opts = "--quiet --mbox";
my $opts = $config->{ article_virus_filter_clamav_options } || $_opts;
if ($program) {
if (-x $program) {
my $_program = sprintf("%s %s", $program, $opts);
return $self->_check($curproc, $_program);
}
else {
$curproc->logerror("$program not exists");
}
}
else {
$curproc->logerror("path_clamscan undefined");
}
return 0;
}
# Descriptions: check the message through $program.
# Arguments: OBJ($self) OBJ($curproc) STR($program)
# Side Effects: none
# Return Value: NUM(1 or 0) (1 if virus)
sub _check
{
my ($self, $curproc, $program) = @_;
use FileHandle;
my $tmp_file = $curproc->tmp_file_path();
my $wh = new FileHandle "> $tmp_file";
if (defined $wh) {
$wh->autoflush(1);
my $msg = $curproc->incoming_message();
$msg->print($wh);
$wh->close();
# XXX-TODO: correct ?
unless (-f $tmp_file) {
return 0;
}
my $status = 0;
system "$program $tmp_file";
if ($status = $?) {
if ($status == 1) {
my $r = "virus found by clamav";
$curproc->logerror($r);
$curproc->filter_state_virus_checker_set_error($r);
return 1;
}
else {
$curproc->logerror("clamscan error: code=$?");
return 0;
}
}
}
return 0;
}
=head1 CODING STYLE
See C on fml coding style guide.
=head1 AUTHOR
Ken'ichi Fukamachi
=head1 COPYRIGHT
Copyright (C) 2004,2005,2007,2008 Ken'ichi Fukamachi
All rights reserved. This program is free software; you can
redistribute it and/or modify it under the same terms as Perl itself.
=head1 HISTORY
FML::Filter::External::clamscan appeared in fml8 mailing list driver package.
See C for more details.
=cut
1;