From 4f61acdbf38aa37617c083d57a3142137a8355a2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc=20Andr=C3=A9=20Tanner?= <mat@brain-dump.org>
Date: Wed, 8 Feb 2017 19:35:31 +0100
Subject: vis-menu: check read(2) return value

Fixes CID 137371
---
 vis-menu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/vis-menu.c b/vis-menu.c
index a5023e2..1682ed2 100644
--- a/vis-menu.c
+++ b/vis-menu.c
@@ -308,7 +308,8 @@ readstdin() {
 
 static void
 xread(int fd, void *buf, size_t nbyte) {
-	if (read(fd, buf, nbyte) < 0)
+	ssize_t r = read(fd, buf, nbyte);
+	if (r < 0 || (size_t)r != nbyte)
 		die("Can not read.");
 }
 
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