From 7ea8baeae3affc468da39ecaeef8829a445e29ef Mon Sep 17 00:00:00 2001
From: Will Woods <wwoods@redhat.com>
Date: Tue, 1 Nov 2011 13:35:24 -0400
Subject: [PATCH] fix mkmacboot truncating the output file

Use open(imgfile, 'r+b'), not 'wb'. Duh.
---
 src/sbin/mkefiboot | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/sbin/mkefiboot b/src/sbin/mkefiboot
index c4c05e83..84b9c5e0 100755
--- a/src/sbin/mkefiboot
+++ b/src/sbin/mkefiboot
@@ -52,7 +52,7 @@ def macbless(imgfile):
     nodedata = struct.pack(">i", blessnode)
     dirdata = struct.pack(">i", dirnode)
     # Write it to the volume header
-    with open(imgfile, "wb") as img:
+    with open(imgfile, "r+b") as img:
         img.seek(0x450)      # HFSPlusVolumeHeader->finderInfo
         img.write(dirdata)   # finderInfo[0]
         img.write(nodedata)  # finderInfo[1]