From 5a43dca273c2628bb4936deb168acb063da5cee9 Mon Sep 17 00:00:00 2001
From: Baptiste Daroussin <bapt@FreeBSD.org>
Date: Tue, 12 Jun 2018 16:40:22 +0000
Subject: [PATCH] Correctly test return value of pipe(2)

CID:		1393351
---
 usr.bin/diff/pr.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/usr.bin/diff/pr.c b/usr.bin/diff/pr.c
index eaf6e37f9f4..ce8620e1432 100644
--- a/usr.bin/diff/pr.c
+++ b/usr.bin/diff/pr.c
@@ -58,7 +58,8 @@ start_pr(char *file1, char *file2)
 	signal(SIGPIPE, SIG_IGN);
 	fflush(stdout);
 	rewind(stdout);
-	pipe(pfd);
+	if (pipe(pfd) == -1)
+		err(2, "pipe");
 	switch ((pid = pdfork(&pr_pd, PD_CLOEXEC))) {
 	case -1:
 		status |= 2;