From 1869e46caf56959e43f0adee84af6e6670727079 Mon Sep 17 00:00:00 2001
From: rzalamena <rzalamena@openbsd.org>
Date: Mon, 8 Aug 2016 16:49:17 +0000
Subject: [PATCH] Handle imsg_read() EAGAIN like the man page code example.

ok reyk@
---
 usr.sbin/switchd/control.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/usr.sbin/switchd/control.c b/usr.sbin/switchd/control.c
index b5ee43cb4dd..0cf1422c41c 100644
--- a/usr.sbin/switchd/control.c
+++ b/usr.sbin/switchd/control.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: control.c,v 1.2 2016/07/20 21:01:06 reyk Exp $	*/
+/*	$OpenBSD: control.c,v 1.3 2016/08/08 16:49:17 rzalamena Exp $	*/
 
 /*
  * Copyright (c) 2010-2016 Reyk Floeter <reyk@openbsd.org>
@@ -309,7 +309,8 @@ control_dispatch_imsg(int fd, short event, void *arg)
 	}
 
 	if (event & EV_READ) {
-		if ((n = imsg_read(&c->iev.ibuf)) == -1 || n == 0) {
+		if (((n = imsg_read(&c->iev.ibuf)) == -1 && errno != EAGAIN) ||
+		    n == 0) {
 			control_close(fd, cs);
 			return;
 		}
-- 
2.20.1