Update

u_skins/players.lua

@@ -1,26 +1,38 @@
-u_skins.file = minetest.get_worldpath() .. "/u_skins.mt"
-u_skins.load = function()
-	local input = io.open(u_skins.file, "r")
-	local data = nil
-	if input then
-		data = input:read('*all')
-	end
-	if data and data ~= "" then
-		lines = string.split(data,"\n")
-		for _, line in ipairs(lines) do
-			data = string.split(line, ' ', 2)
+u_skins.load_players = function()
+	local file = io.open(u_skins.file, "r")
+	if file then
+		for line in file:lines() do
+			local data = string.split(line, " ", 2)
 			u_skins.u_skins[data[1]] = data[2]
 		end
-		io.close(input)
+		io.close(file)
 	end
 end
-u_skins.load()
+u_skins.load_players()
+
+local ttime = 0
+minetest.register_globalstep(function(t)
+	ttime = ttime + t
+	if ttime < 360 then --every 6min'
+		return
+	end
+	ttime = 0
+	u_skins.save()
+end)
+
+minetest.register_on_shutdown(function() u_skins.save() end)
 
 u_skins.save = function()
-	local output = io.open(u_skins.file,'w')
+	if not u_skins.file_save then
+		return
+	end
+	u_skins.file_save = false
+	local output = io.open(u_skins.file, "w")
 	for name, skin in pairs(u_skins.u_skins) do
 		if name and skin then
-			output:write(name .. " " .. skin .. "\n")
+			if skin ~= "character_1" then
+				output:write(name.." "..skin.."\n")
+			end
 		end
 	end
 	io.close(output)