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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>
# for systems lacking Linux::Inotify2 or IO::KQueue, just emulates
# enough of Linux::Inotify2
package PublicInbox::FakeInotify;
use strict;
use Time::HiRes qw(stat);
my $IN_CLOSE = 0x08 | 0x10; # match Linux inotify
sub new { bless { watch => {} }, __PACKAGE__ }
# behaves like Linux::Inotify2->watch
sub watch {
my ($self, $path, $mask, $cb) = @_;
my @st = stat($path) or return;
$self->{watch}->{"$path\0$mask"} = [ @st, $cb ];
}
# behaves like non-blocking Linux::Inotify2->poll
sub poll {
my ($self) = @_;
my $watch = $self->{watch} or return;
for my $x (keys %$watch) {
my ($path, $mask) = split(/\0/, $x, 2);
my @now = stat($path) or next;
my $prv = $watch->{$x};
my $cb = $prv->[-1];
# 10: ctime, 7: size
if ($prv->[10] != $now[10]) {
if (($mask & $IN_CLOSE) == $IN_CLOSE) {
eval { $cb->() };
}
}
@$prv = (@now, $cb);
}
}
1;
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