From 6134f824529b62e95d743c04cdd59f51af3968d7 Mon Sep 17 00:00:00 2001
From: mdipierro <massimo.dipierro@gmail.com>
Date: Fri, 26 Jun 2015 06:58:07 -0500
Subject: [PATCH] fixed issuer #239, locking error on FreeBSD, thanks
 josejachuf

---
 gluon/portalocker.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gluon/portalocker.py b/gluon/portalocker.py
index 2bcd63f5..de584323 100644
--- a/gluon/portalocker.py
+++ b/gluon/portalocker.py
@@ -119,7 +119,7 @@ class LockedFile(object):
             lock(self.file, LOCK_EX)
             if not 'a' in mode:
                 self.file.seek(0)
-                self.file.truncate()
+                self.file.truncate(0)
         else:
             raise RuntimeError("invalid LockedFile(...,mode)")