From dcab91281821c69b4f0f4be3f497e3427a39a2b9 Mon Sep 17 00:00:00 2001
From: anton <anton@openbsd.org>
Date: Tue, 10 Oct 2023 18:18:05 +0000
Subject: [PATCH] Fix timing issue in which one thread could be left hanging in
 pipe_read().

---
 regress/sys/kern/pipe/test-kqueue.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/regress/sys/kern/pipe/test-kqueue.c b/regress/sys/kern/pipe/test-kqueue.c
index ede5bc96c88..f13015f8be7 100644
--- a/regress/sys/kern/pipe/test-kqueue.c
+++ b/regress/sys/kern/pipe/test-kqueue.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: test-kqueue.c,v 1.4 2021/10/22 05:03:57 anton Exp $	*/
+/*	$OpenBSD: test-kqueue.c,v 1.5 2023/10/10 18:18:05 anton Exp $	*/
 
 /*
  * Copyright (c) 2019 Anton Lindqvist <anton@openbsd.org>
@@ -137,6 +137,8 @@ test_kqueue_write(void)
 		n = read(ctx.c_pipe[0], &c, 1);
 		if (n == -1)
 			err(1, "read");
+		if (n == 0)
+			break;
 		if (n != 1)
 			errx(1, "read: %ld != 1", n);
 	}
@@ -296,5 +298,7 @@ kqueue_thread(void *arg)
 	ctx->c_alive = 0;
 	ctx_unlock(ctx);
 
+	close(fd);
+
 	return NULL;
 }
-- 
2.20.1