From d3e67ccbcdc69e392a7d93e88636136d16045e6f Mon Sep 17 00:00:00 2001
From: Lance Edgar <lance@edbob.org>
Date: Sun, 15 Jul 2018 17:40:46 -0500
Subject: [PATCH] Fix how we check file size when reading stdout for upgrade

i guess sometimes we were getting a negative number there
---
 tailbone/views/upgrades.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tailbone/views/upgrades.py b/tailbone/views/upgrades.py
index a62b3815..2bb58006 100644
--- a/tailbone/views/upgrades.py
+++ b/tailbone/views/upgrades.py
@@ -343,7 +343,7 @@ class UpgradeView(MasterView):
         offset = session.get('stdout.offset', 0)
         if os.path.exists(path):
             size = os.path.getsize(path) - offset
-            if size:
+            if size > 0:
                 with open(path, 'rb') as f:
                     f.seek(offset)
                     chunk = f.read(size)