1 # Copyright (C) 2016-2021 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(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) = @_;
24 my $rdr = { 0 => _msg_to_fh($self, $msg) };
25 my ($fh, $pid) = popen_rd($self->{checkcmd}, undef, $rdr);
30 $$out = do { local $/; <$fh> };
31 close $fh or die "close failed: $!";
33 ($? || $$out eq '') ? 0 : 1;
37 my ($self, $msg, $rdr) = @_;
38 _learn($self, $msg, $rdr, 'hamcmd');
42 my ($self, $msg, $rdr) = @_;
43 _learn($self, $msg, $rdr, 'spamcmd');
47 my ($self, $msg, $rdr, $field) = @_;
49 $rdr->{0} = _msg_to_fh($self, $msg);
50 $rdr->{1} ||= $self->_devnull;
51 $rdr->{2} ||= $self->_devnull;
52 my $pid = spawn($self->{$field}, undef, $rdr);
59 $self->{-devnull} //= do {
60 open my $fh, '+>', '/dev/null' or
61 die "failed to open /dev/null: $!";
67 my ($self, $msg) = @_;
68 if (my $ref = ref($msg)) {
69 my $fd = eval { fileno($msg) };
70 return $msg if defined($fd) && $fd >= 0;
72 open(my $tmpfh, '+>', undef) or die "failed to open: $!";
74 $msg = \($msg->as_string) if $ref ne 'SCALAR';
75 print $tmpfh $$msg or die "failed to print: $!";
76 sysseek($tmpfh, 0, SEEK_SET) or
77 die "sysseek(fh) failed: $!";