From a70f65817d71450c31c39c0e9a46b5739484da9e Mon Sep 17 00:00:00 2001
From: kn <kn@openbsd.org>
Date: Wed, 27 Jul 2022 19:42:22 +0000
Subject: [PATCH] Print poll(2) errno

Distinguish between return values -1 (errno set) and 0.

OK kettenis
---
 usr.sbin/ldomd/ds.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/usr.sbin/ldomd/ds.c b/usr.sbin/ldomd/ds.c
index 47fc147a277..0090a6047a9 100644
--- a/usr.sbin/ldomd/ds.c
+++ b/usr.sbin/ldomd/ds.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ds.c,v 1.11 2021/10/24 21:24:18 deraadt Exp $	*/
+/*	$OpenBSD: ds.c,v 1.12 2022/07/27 19:42:22 kn Exp $	*/
 
 /*
  * Copyright (c) 2012 Mark Kettenis
@@ -741,8 +741,10 @@ ds_conn_serve(void)
 
 	while (1) {
 		nfds = poll(pfd, num_ds_conns, -1);
-		if (nfds == -1 || nfds == 0)
-			errx(1, "poll");
+		if (nfds == -1)
+			err(1, "poll");
+		if (nfds == 0)
+			errx(1, "poll timeout");
 
 		TAILQ_FOREACH(dc, &ds_conns, link) {
 			if (pfd[dc->id].revents)
-- 
2.20.1