From cb711f6d5d029298892bd1ad508619f6bb7f25d7 Mon Sep 17 00:00:00 2001
From: Eitan Adler <eadler@FreeBSD.org>
Date: Thu, 15 Nov 2012 15:05:57 +0000
Subject: [PATCH] Add a missing check for fread

Approved by:	cperciva
MFC after:	3 days
---
 usr.sbin/ndiscvt/ndiscvt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/usr.sbin/ndiscvt/ndiscvt.c b/usr.sbin/ndiscvt/ndiscvt.c
index 3775a3390817..7636c4c75059 100644
--- a/usr.sbin/ndiscvt/ndiscvt.c
+++ b/usr.sbin/ndiscvt/ndiscvt.c
@@ -325,6 +325,8 @@ main(int argc, char *argv[])
 	rewind (fp);
 	img = calloc(fsize, 1);
 	n = fread (img, fsize, 1, fp);
+	if (n == 0)
+		err(1, "reading .SYS file '%s' failed", sysfile);
 
 	fclose(fp);