1 # Copyright (C) 2016-2019 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # Default spam filter class for wrapping spamc(1)
5 package PublicInbox::Spamcheck::Spamc;
8 use PublicInbox::Spawn qw(popen_rd spawn);
10 use Fcntl qw(:DEFAULT SEEK_SET);
15 checkcmd => [qw(spamc -E --headers)],
16 hamcmd => [qw(spamc -L ham)],
17 spamcmd => [qw(spamc -L spam)],
22 my ($self, $msg, $out) = @_;
25 my $fd = _msg_to_fd($self, $msg, \$tmp);
26 my $rdr = { 0 => $fd };
27 my ($fh, $pid) = popen_rd($self->{checkcmd}, undef, $rdr);
28 defined $pid or die "failed to popen_rd spamc: $!\n";
36 $r = sysread($fh, $$out, 65536, length($$out));
37 } while (defined($r) && $r != 0);
39 goto again if $!{EINTR};
40 die "read failed: $!";
42 close $fh or die "close failed: $!";
44 ($? || $$out eq '') ? 0 : 1;
48 my ($self, $msg, $rdr) = @_;
49 _learn($self, $msg, $rdr, 'hamcmd');
53 my ($self, $msg, $rdr) = @_;
54 _learn($self, $msg, $rdr, 'spamcmd');
58 my ($self, $msg, $rdr, $field) = @_;
60 $rdr->{1} ||= $self->_devnull;
61 $rdr->{2} ||= $self->_devnull;
63 $rdr->{0} = _msg_to_fd($self, $msg, \$tmp);
64 my $pid = spawn($self->{$field}, undef, $rdr);
71 my $fd = $self->{-devnullfd};
72 return $fd if defined $fd;
73 open my $fh, '+>', '/dev/null' or
74 die "failed to open /dev/null: $!";
75 $self->{-devnull} = $fh;
76 $self->{-devnullfd} = fileno($fh);
80 my ($self, $msg, $tmpref) = @_;
82 if (my $ref = ref($msg)) {
83 my $fileno = eval { fileno($msg) };
84 return $fileno if defined $fileno;
86 open(my $tmpfh, '+>', undef) or die "failed to open: $!";
88 $msg = \($msg->as_string) if $ref ne 'SCALAR';
89 print $tmpfh $$msg or die "failed to print: $!";
90 sysseek($tmpfh, 0, SEEK_SET) or
91 die "sysseek(fh) failed: $!";
94 return fileno($tmpfh);