#!/usr/bin/perl -w
-# Copyright (C) 2013-2015 all contributors <meta@public-inbox.org>
-# License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt)
+# Copyright (C) 2013-2021 all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
#
# Mail delivery agent for public-inbox, run from your MTA upon mail delivery
+my $help = <<EOF;
+usage: public-inbox-mda [OPTIONS] </path/to/RFC2822_message
+
+options:
+
+ --no-precheck skip internal checks for spam messages
+
+See public-inbox-mda(1) man page for full documentation.
+EOF
use strict;
-use warnings;
-my $usage = 'public-inbox-mda < rfc2822_message';
+use Getopt::Long qw(:config gnu_getopt no_ignore_case auto_abbrev);
+my ($ems, $emm, $show_help);
+my $precheck = 1;
+GetOptions('precheck!' => \$precheck, 'help|h' => \$show_help) or
+ do { print STDERR $help; exit 1 };
+
+my $do_exit = sub {
+ my ($code) = shift;
+ $emm = $ems = undef; # trigger DESTROY
+ exit $code;
+};
-use Email::Filter;
-use Email::MIME;
-use File::Path::Expand qw/expand_filename/;
-use IPC::Run qw(run);
+use PublicInbox::Eml;
use PublicInbox::MDA;
-use PublicInbox::Filter;
use PublicInbox::Config;
-use PublicInbox::Import;
-use PublicInbox::Git;
+use PublicInbox::Emergency;
+use PublicInbox::Filter::Base;
+use PublicInbox::InboxWritable;
+use PublicInbox::Spamcheck;
# n.b: hopefully we can setup the emergency path without bailing due to
# user error, we really want to setup the emergency destination ASAP
# in case there's bugs in our code or user error.
-my $emergency = $ENV{PI_EMERGENCY} || '~/.public-inbox/emergency/';
-$emergency = expand_filename($emergency);
-
-# this reads the message from stdin
-my $filter = Email::Filter->new(emergency => $emergency);
-my $config = PublicInbox::Config->new;
-
+my $emergency = $ENV{PI_EMERGENCY} || "$ENV{HOME}/.public-inbox/emergency/";
+$ems = PublicInbox::Emergency->new($emergency);
+my $str = do { local $/; <STDIN> };
+$str =~ s/\A[\r\n]*From [^\r\n]*\r?\n//s;
+$ems->prepare(\$str);
+my $eml = PublicInbox::Eml->new(\$str);
+my $cfg = PublicInbox::Config->new;
+my $key = 'publicinboxmda.spamcheck';
+my $default = 'PublicInbox::Spamcheck::Spamc';
+my $spamc = PublicInbox::Spamcheck::get($cfg, $key, $default);
+my $dests = [];
my $recipient = $ENV{ORIGINAL_RECIPIENT};
-defined $recipient or die "ORIGINAL_RECIPIENT not defined in ENV\n";
-my $dst = $config->lookup($recipient); # first check
-defined $dst or exit(1);
-my $main_repo = $dst->{mainrepo} or exit(1);
-my $filtered; # string dest
-
-if (PublicInbox::MDA->precheck($filter, $dst->{address}) &&
- do_spamc($filter->simple, \$filtered)) {
- # update our message with SA headers (in case our filter rejects it)
- my $msg = Email::MIME->new(\$filtered);
- $filtered = undef;
- $filter->simple($msg);
+if (defined $recipient) {
+ my $ibx = $cfg->lookup($recipient); # first check
+ push @$dests, $ibx if $ibx;
+}
+if (!scalar(@$dests)) {
+ $dests = PublicInbox::MDA->inboxes_for_list_id($cfg, $eml);
+ if (!scalar(@$dests) && !defined($recipient)) {
+ die "ORIGINAL_RECIPIENT not defined in ENV\n";
+ }
+ scalar(@$dests) or $do_exit->(67); # EX_NOUSER 5.1.1 user unknown
+}
- my $filter_arg;
- my $fcfg = $dst->{filter};
- if (!defined $fcfg || $filter eq 'reject') {
- $filter_arg = $filter;
- } elsif ($fcfg eq 'scrub') {
- $filter_arg = undef; # the default for legacy versions
+my $err;
+@$dests = grep {
+ my $ibx = PublicInbox::InboxWritable->new($_);
+ eval { $ibx->assert_usable_dir };
+ if ($@) {
+ warn $@;
+ $err = 1;
+ 0;
+ # pre-check, MDA has stricter rules than an importer might;
+ } elsif ($precheck) {
+ !!PublicInbox::MDA->precheck($eml, $ibx->{address});
} else {
- warn "publicinbox.$dst->{name}.filter=$fcfg invalid\n";
- warn "must be either 'scrub' or 'reject' (the default)\n";
+ 1;
}
+} @$dests;
- if (PublicInbox::Filter->run($msg, $filter_arg)) {
- # run spamc again on the HTML-free message
- if (do_spamc($msg, \$filtered)) {
- $msg = Email::MIME->new(\$filtered);
- PublicInbox::MDA->set_list_headers($msg, $dst);
- $filter->simple($msg);
+$do_exit->(67) if $err && scalar(@$dests) == 0;
- END {
- index_sync($main_repo) if ($? == 0);
- };
- my $git = PublicInbox::Git->new($main_repo);
- my $im = PublicInbox::Import->new($git,
- $dst->{name}, $recipient);
- if (defined $im->add($msg)) {
- $im->done;
- $filter->ignore; # exits
- }
- # this message is similar to what ssoma-mda shows:
- print STDERR "CONFLICT: Message-ID: ",
- $msg->header_obj->header_raw('Message-ID'),
- " exists\n";
- }
- }
-} else {
- # Ensure emergency spam gets spamassassin headers.
- # This makes it easier to prioritize obvious spam from less obvious
- if (defined($filtered) && $filtered ne '') {
- my $drop = Email::MIME->new(\$filtered);
- $filtered = undef;
- $filter->simple($drop);
+$eml = undef;
+my $spam_ok;
+if ($spamc) {
+ $str = '';
+ $spam_ok = $spamc->spamcheck($ems->fh, \$str);
+ # update the emergency dump with the new message:
+ $emm = PublicInbox::Emergency->new($emergency);
+ $emm->prepare(\$str);
+ $ems = $ems->abort;
+} else { # no spam checking configured:
+ $spam_ok = 1;
+ $emm = $ems;
+ my $fh = $emm->fh;
+ read($fh, $str, -s $fh);
+}
+$do_exit->(0) unless $spam_ok;
+
+# -mda defaults to the strict base filter which we won't use anywhere else
+sub mda_filter_adjust ($) {
+ my ($ibx) = @_;
+ my $fcfg = $ibx->{filter} || '';
+ if ($fcfg eq '') {
+ $ibx->{filter} = 'PublicInbox::Filter::Base';
+ } elsif ($fcfg eq 'scrub') { # legacy alias, undocumented, remove?
+ $ibx->{filter} = 'PublicInbox::Filter::Mirror';
}
}
-exit 0; # goes to emergency
-# we depend on "report_safe 0" in /etc/spamassassin/*.cf with --headers
-# not using Email::Filter->pipe here since we want the stdout of
-# the command even on failure (spamc will set $? on error).
-sub do_spamc {
- my ($msg, $out) = @_;
- eval {
- my $orig = $msg->as_string;
- run([qw/spamc -E --headers/], \$orig, $out);
- };
+my @rejects;
+for my $ibx (@$dests) {
+ mda_filter_adjust($ibx);
+ my $filter = $ibx->filter;
+ my $mime = PublicInbox::Eml->new($str);
+ my $ret = $filter->delivery($mime);
+ if (ref($ret) && ($ret->isa('PublicInbox::Eml') ||
+ $ret->isa('Email::MIME'))) { # filter altered message
+ $mime = $ret;
+ } elsif ($ret == PublicInbox::Filter::Base::IGNORE) {
+ next; # nothing, keep looping
+ } elsif ($ret == PublicInbox::Filter::Base::REJECT) {
+ push @rejects, $filter->err;
+ next;
+ }
- return ($@ || $? || !defined($$out) || $$out eq '') ? 0 : 1;
+ PublicInbox::MDA->set_list_headers($mime, $ibx);
+ my $im = $ibx->importer(0);
+ if (defined $im->add($mime)) {
+ # ->abort is idempotent, no emergency if a single
+ # destination succeeds
+ $emm->abort;
+ } else { # v1-only
+ my $mid = $mime->header_raw('Message-ID');
+ # this message is similar to what ssoma-mda shows:
+ print STDERR "CONFLICT: Message-ID: $mid exists\n";
+ }
+ $im->done;
}
-sub index_sync {
- my ($git_dir) = @_;
- eval {
- require PublicInbox::SearchIdx;
- PublicInbox::SearchIdx->new($git_dir, 2)->index_sync;
- };
+if (scalar(@rejects) && scalar(@rejects) == scalar(@$dests)) {
+ $! = 65; # EX_DATAERR 5.6.0 data format error
+ die join("\n", @rejects, '');
}
+
+$do_exit->(0);