From 8a95f3d279e32b0015881cd5dcc9488fcefe3439 Mon Sep 17 00:00:00 2001
From: Jim Hague <jim.hague@acm.org>
Date: Fri, 12 Jun 2020 10:49:47 +0100
Subject: [PATCH] Observe blocking flag in select run_once.

Currently run_once always blocks.
---
 src/extension/select_eventloop.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/extension/select_eventloop.c b/src/extension/select_eventloop.c
index 7855c21d..3311669b 100644
--- a/src/extension/select_eventloop.c
+++ b/src/extension/select_eventloop.c
@@ -244,7 +244,7 @@ select_eventloop_run_once(getdns_eventloop *loop, int blocking)
 	} else {
 #endif
 	if (select(max_fd + 1, &readfds, &writefds, NULL,
-	    (timeout == TIMEOUT_FOREVER ? NULL : &tv)) < 0) {
+		   ((blocking && timeout == TIMEOUT_FOREVER) ? NULL : &tv)) < 0) {
 		if (_getdns_socketerror_wants_retry())
 			return;