X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=examples%2Funsubscribe.milter;h=608524cbaca40337a8ca45a1f0b7d0ba38cfd774;hb=44812cbbec44625083b6e5441a798a21a5e79f71;hp=232295112d54b4e6b51716cf814da433ee97a1f9;hpb=95bdac7f09c69036efed537a4d03d5bdd2ae4eb6;p=public-inbox.git

diff --git a/examples/unsubscribe.milter b/examples/unsubscribe.milter
index 23229511..608524cb 100644
--- a/examples/unsubscribe.milter
+++ b/examples/unsubscribe.milter
@@ -1,8 +1,7 @@
 #!/usr/bin/perl -w
-# Copyright (C) 2016-2020 all contributors <meta@public-inbox.org>
+# Copyright (C) 2016-2021 all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 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 {