1 # Copyright (C) 2020 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
5 # inot: Linux::Inotify2-like object
6 # pathmap => { inboxdir => [ ibx, watch1, watch2, watch3... ] } mapping
7 package PublicInbox::InboxIdle;
9 use parent qw(PublicInbox::DS);
11 use PublicInbox::Syscall qw(EPOLLIN EPOLLET);
12 my $IN_MODIFY = 0x02; # match Linux inotify
14 if ($^O eq 'linux' && eval { require Linux::Inotify2; 1 }) {
15 $IN_MODIFY = Linux::Inotify2::IN_MODIFY();
16 $ino_cls = 'Linux::Inotify2';
17 } elsif (eval { require PublicInbox::KQNotify }) {
18 $IN_MODIFY = PublicInbox::KQNotify::NOTE_WRITE();
19 $ino_cls = 'PublicInbox::KQNotify';
21 require PublicInbox::In2Tie if $ino_cls;
23 sub in2_arm ($$) { # PublicInbox::Config::each_inbox callback
24 my ($ibx, $self) = @_;
25 my $dir = abs_path($ibx->{inboxdir});
27 warn "W: $ibx->{inboxdir} not watched: $!\n";
30 my $inot = $self->{inot};
31 my $cur = $self->{pathmap}->{$dir} //= [];
33 # transfer old subscriptions to the current inbox, cancel the old watch
34 if (my $old_ibx = $cur->[0]) {
35 $ibx->{unlock_subs} and
36 die "BUG: $dir->{unlock_subs} should not exist";
37 $ibx->{unlock_subs} = $old_ibx->{unlock_subs};
38 $cur->[1]->cancel; # Linux::Inotify2::Watch::cancel
42 my $lock = "$dir/".($ibx->version >= 2 ? 'inbox.lock' : 'ssoma.lock');
43 if (my $w = $cur->[1] = $inot->watch($lock, $IN_MODIFY)) {
44 $self->{on_unlock}->{$w->name} = $ibx;
46 warn "E: ".ref($inot)."->watch($lock, IN_MODIFY) failed: $!\n";
49 # TODO: detect deleted packs (and possibly other files)
53 my ($self, $pi_cfg) = @_;
54 $pi_cfg->each_inbox(\&in2_arm, $self);
58 my ($class, $pi_cfg) = @_;
59 my $self = bless {}, $class;
62 $inot = $ino_cls->new or die "E: $ino_cls->new: $!";
63 my $io = PublicInbox::In2Tie::io($inot);
64 $self->SUPER::new($io, EPOLLIN | EPOLLET);
66 require PublicInbox::FakeInotify;
67 $inot = PublicInbox::FakeInotify->new;
69 $self->{inot} = $inot;
70 $self->{pathmap} = {}; # inboxdir => [ ibx, watch1, watch2, watch3...]
71 $self->{on_unlock} = {}; # lock path => ibx
72 refresh($self, $pi_cfg);
73 PublicInbox::FakeInotify::poll_once($self) if !$ino_cls;
80 my @events = $self->{inot}->read; # Linux::Inotify2::read
81 my $on_unlock = $self->{on_unlock};
82 for my $ev (@events) {
83 if (my $ibx = $on_unlock->{$ev->fullname}) {
88 warn "{inot}->read err: $@\n" if $@;
91 # for graceful shutdown in PublicInbox::Daemon,
92 # just ensure the FD gets closed ASAP and subscribers