-# Copyright (C) 2020-2021 all contributors <meta@public-inbox.org>
+# Copyright (C) all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
# callers should use PublicInbox::CmdIPC4->can('send_cmd4') (or recv_cmd4)
# first choice for script/lei front-end and 2nd choice for lei backend
# libsocket-msghdr-perl is in Debian but not many other distros as of 2021.
package PublicInbox::CmdIPC4;
-use strict;
-use v5.10.1;
+use v5.12;
use Socket qw(SOL_SOCKET SCM_RIGHTS);
BEGIN { eval {
require Socket::MsgHdr; # XS
*recv_cmd4 = sub ($$$) {
my ($s, undef, $len) = @_; # $_[1] = destination buffer
my $mh = Socket::MsgHdr->new(buflen => $len, controllen => 256);
- my $r = Socket::MsgHdr::recvmsg($s, $mh, 0) // return ($_[1] = undef);
+ my $r = Socket::MsgHdr::recvmsg($s, $mh, 0) // return (undef);
$_[1] = $mh->buf;
return () if $r == 0;
my (undef, undef, $data) = $mh->cmsghdr;