X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=examples%2Funsubscribe.milter;h=608524cbaca40337a8ca45a1f0b7d0ba38cfd774;hb=a34e62ec1d84eafb67cc63532a383d15a18dcc4d;hp=7b126e3094e4f0e2b46aebc81bae952d8dadfaec;hpb=af0b0fb7a454470a32c452119d0392e0dedb3fe1;p=public-inbox.git
diff --git a/examples/unsubscribe.milter b/examples/unsubscribe.milter
index 7b126e30..608524cb 100644
--- a/examples/unsubscribe.milter
+++ b/examples/unsubscribe.milter
@@ -2,7 +2,6 @@
# Copyright (C) 2016-2021 all contributors
# License: AGPL-3.0+
use strict;
-use warnings;
use Sendmail::PMilter qw(:all);
use IO::Socket;
use Crypt::CBC;
@@ -128,7 +127,7 @@ my $fds = $ENV{LISTEN_FDS};
if ($fds && (($ENV{LISTEN_PID} || 0) == $$)) {
die "$0 can only listen on one FD\n" if $fds != 1;
my $start_fd = 3;
- my $s = IO::Socket->new_from_fd($start_fd, 'r') or
+ open(my $s, '<&=', $start_fd) or
die "inherited bad FD from LISTEN_FDS: $!\n";
$milter->set_socket($s);
} else {