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| | # Copyright (C) 2020 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
# Used by public-inbox-watch for Maildir (and possibly MH in the future)
package PublicInbox::DirIdle;
use strict;
use parent 'PublicInbox::DS';
use PublicInbox::Syscall qw(EPOLLIN EPOLLET);
use PublicInbox::In2Tie;
my ($MAIL_IN, $ino_cls);
if ($^O eq 'linux' && eval { require Linux::Inotify2; 1 }) {
$MAIL_IN = Linux::Inotify2::IN_MOVED_TO() |
Linux::Inotify2::IN_CREATE();
$ino_cls = 'Linux::Inotify2';
# Perl 5.22+ is needed for fileno(DIRHANDLE) support:
} elsif ($^V ge v5.22 && eval { require PublicInbox::KQNotify }) {
$MAIL_IN = PublicInbox::KQNotify::MOVED_TO_OR_CREATE();
$ino_cls = 'PublicInbox::KQNotify';
} else {
require PublicInbox::FakeInotify;
$MAIL_IN = PublicInbox::FakeInotify::MOVED_TO_OR_CREATE();
}
sub new {
my ($class, $dirs, $cb) = @_;
my $self = bless { cb => $cb }, $class;
my $inot;
if ($ino_cls) {
$inot = $ino_cls->new or die "E: $ino_cls->new: $!";
my $io = PublicInbox::In2Tie::io($inot);
$self->SUPER::new($io, EPOLLIN | EPOLLET);
} else {
require PublicInbox::FakeInotify;
$inot = PublicInbox::FakeInotify->new; # starts timer
}
# Linux::Inotify2->watch or similar
$inot->watch($_, $MAIL_IN) for @$dirs;
$self->{inot} = $inot;
PublicInbox::FakeInotify::poll_once($self) if !$ino_cls;
$self;
}
sub event_step {
my ($self) = @_;
my $cb = $self->{cb};
local $PublicInbox::DS::in_loop = 0; # waitpid() synchronously
eval {
my @events = $self->{inot}->read; # Linux::Inotify2->read
$cb->($_) for @events;
};
warn "$self->{inot}->read err: $@\n" if $@;
}
1;
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