1 # Copyright (C) 2020-2021 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # Used by public-inbox-watch for Maildir (and possibly MH in the future)
5 package PublicInbox::DirIdle;
7 use parent 'PublicInbox::DS';
8 use PublicInbox::Syscall qw(EPOLLIN EPOLLET);
9 use PublicInbox::In2Tie;
11 my ($MAIL_IN, $MAIL_GONE, $ino_cls);
12 if ($^O eq 'linux' && eval { require Linux::Inotify2; 1 }) {
13 $MAIL_IN = Linux::Inotify2::IN_MOVED_TO() |
14 Linux::Inotify2::IN_CREATE();
15 $MAIL_GONE = Linux::Inotify2::IN_DELETE();
16 $ino_cls = 'Linux::Inotify2';
17 # Perl 5.22+ is needed for fileno(DIRHANDLE) support:
18 } elsif ($^V ge v5.22 && eval { require PublicInbox::KQNotify }) {
19 $MAIL_IN = PublicInbox::KQNotify::MOVED_TO_OR_CREATE();
20 $MAIL_GONE = PublicInbox::KQNotify::NOTE_DELETE();
21 $ino_cls = 'PublicInbox::KQNotify';
23 require PublicInbox::FakeInotify;
24 $MAIL_IN = PublicInbox::FakeInotify::MOVED_TO_OR_CREATE();
25 $MAIL_GONE = PublicInbox::FakeInotify::IN_DELETE();
29 my ($class, $dirs, $cb, $gone) = @_;
30 my $self = bless { cb => $cb }, $class;
33 $inot = $ino_cls->new or die "E: $ino_cls->new: $!";
34 my $io = PublicInbox::In2Tie::io($inot);
35 $self->SUPER::new($io, EPOLLIN | EPOLLET);
37 require PublicInbox::FakeInotify;
38 $inot = PublicInbox::FakeInotify->new; # starts timer
41 # Linux::Inotify2->watch or similar
43 $fl |= $MAIL_GONE if $gone;
44 $inot->watch($_, $fl) for @$dirs;
45 $self->{inot} = $inot;
46 PublicInbox::FakeInotify::poll_once($self) if !$ino_cls;
53 local $PublicInbox::DS::in_loop = 0; # waitpid() synchronously
55 my @events = $self->{inot}->read; # Linux::Inotify2->read
56 $cb->($_) for @events;
58 warn "$self->{inot}->read err: $@\n" if $@;