# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1572787983 -3600
# Node ID b8bd79c57040cee45c35467c63175590c7c896f8
# Parent  9a3d25311fd9351482074bffd2c67dcca5620be5
mod_log_json: Open file in read+append mode

Dunno why but this is what core.loggingmanager does

diff -r 9a3d25311fd9 -r b8bd79c57040 mod_log_json/mod_log_json.lua
--- a/mod_log_json/mod_log_json.lua	Sun Nov 03 14:33:01 2019 +0100
+++ b/mod_log_json/mod_log_json.lua	Sun Nov 03 14:33:03 2019 +0100
@@ -6,7 +6,7 @@
 module:set_global();
 
 local function sink_maker(config)
-	local logfile = io.open(config.filename, "a");
+	local logfile = io.open(config.filename, "a+");
 	logfile:setvbuf("no");
 	return function (source, level, message, ...)
 		local args = pack(...);