From 18cb5432ff8d12065d091b8a0b4508d5734742ae Mon Sep 17 00:00:00 2001
From: Philip Withnall <philip@tecnocode.co.uk>
Date: Mon, 3 Nov 2014 09:49:03 +0000
Subject: [PATCH] connection: Fix sendmsg() on FreeBSD

It expects ((msg_controllen == 0) == (msg_control == NULL)), and returns
EINVAL otherwise. It can't hurt to be tidy about things on other platforms
either though.

See: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=99356#c5

Signed-off-by: Philip Withnall <philip at tecnocode.co.uk>
Signed-off-by: Karsten Otto <ottoka at posteo.de>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
---
 src/connection.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/connection.c b/src/connection.c
index f2928536..1e271c42 100644
--- a/src/connection.c
+++ b/src/connection.c
@@ -287,7 +287,7 @@ wl_connection_flush(struct wl_connection *connection)
 		msg.msg_namelen = 0;
 		msg.msg_iov = iov;
 		msg.msg_iovlen = count;
-		msg.msg_control = cmsg;
+		msg.msg_control = (clen > 0) ? cmsg : NULL;
 		msg.msg_controllen = clen;
 		msg.msg_flags = 0;