From 5c0c4793478fe231fe8a54147533ffe6d0f0a184 Mon Sep 17 00:00:00 2001
From: Jonas 'Sortie' Termansen <sortie@maxsi.org>
Date: Wed, 1 Oct 2014 20:12:08 +0200
Subject: [PATCH] Fix mbr error messages on empty partitions.

---
 mbr/mbrfs.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/mbr/mbrfs.cpp b/mbr/mbrfs.cpp
index a7f2b2f7..0bae2786 100644
--- a/mbr/mbrfs.cpp
+++ b/mbr/mbrfs.cpp
@@ -237,9 +237,10 @@ int main(int argc, char* argv[])
 		if ( fd < 0 )
 			error(1, errno, "`%s'", path);
 		struct mbr mbr;
-		if ( preadall(fd, &mbr, sizeof(mbr), 0) != sizeof(mbr) )
+		size_t amount = preadall(fd, &mbr, sizeof(mbr), 0);
+		if ( amount < sizeof(mbr) && errno != EEOF )
 			error(1, errno, "read: `%s'", path);
-		if ( !verify_is_mbr(&mbr) )
+		if ( amount < sizeof(mbr) || !verify_is_mbr(&mbr) )
 		{
 			if ( probe )
 				exit(1);