From 92345b0a01c6c0142d2e3582275cd582743a729b Mon Sep 17 00:00:00 2001
From: daurnimator <quae@daurnimator.com>
Date: Sun, 24 Nov 2013 04:35:44 -0500
Subject: [PATCH 1/1] luatz/tzfile: Open files in readonly binary mode; and if
 invalid: throw a better error message

---
 luatz/tzfile.lua | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/luatz/tzfile.lua b/luatz/tzfile.lua
index eed426e..96686dc 100644
--- a/luatz/tzfile.lua
+++ b/luatz/tzfile.lua
@@ -39,7 +39,7 @@ end
 
 local fifteen_nulls = ("\0"):rep(15)
 local function read_tz ( fd )
-	assert ( fd:read(4) == "TZif" )
+	assert ( fd:read(4) == "TZif" , "Invalid TZ file" )
 	local version = assert ( fd:read(1) )
 	if version == "\0" or version == "2" then
 		local MIN_TIME = -2^32+1
@@ -198,7 +198,7 @@ local function read_tz ( fd )
 end
 
 local function read_tzfile ( path )
-	local fd = assert ( io.open ( path ) )
+	local fd = assert ( io.open ( path , "rb" ) )
 	local tzinfo = read_tz ( fd )
 	fd:close ( )
 	return tzinfo
-- 
2.39.5