-# 3 FDs per-sendmsg(2) + buffer
-*send_cmd4 = sub ($$$$$$) { # (sock, in, out, err, buf, flags) = @_;
- my $mh = Socket::MsgHdr->new(buf => $_[4]);
- $mh->cmsghdr(SOL_SOCKET, SCM_RIGHTS, pack('iii', @_[1,2,3]));
- Socket::MsgHdr::sendmsg($_[0], $mh, $_[5]) or die "sendmsg: $!";
+# any number of FDs per-sendmsg(2) + buffer
+*send_cmd4 = sub ($$$$) { # (sock, fds, buf, flags) = @_;
+ my ($sock, $fds, undef, $flags) = @_;
+ my $mh = Socket::MsgHdr->new(buf => $_[2]);
+ $mh->cmsghdr(SOL_SOCKET, SCM_RIGHTS, pack('i' x scalar(@$fds), @$fds));
+ my $s;
+ my $try = 0;
+ do {
+ $s = Socket::MsgHdr::sendmsg($sock, $mh, $flags);
+ } while (!defined($s) &&
+ ($!{ENOBUFS} || $!{ENOMEM} || $!{ETOOMANYREFS}) &&
+ (++$try < 50) &&
+ warn "sleeping on sendmsg: $! (#$try)\n" &&
+ select(undef, undef, undef, 0.1) == 0);
+ $s;