-ui/menu.cpp: Don't pass IPT_UI_BACK event to the implementation when dismissing the menu.

-plugins/autofire, plugins/inputmacro: Don't be so eager to create empty settings folders.

plugins/autofire/autofire_save.lua

@@ -75,9 +75,7 @@ end
 function lib:save_settings(buttons)
 	local path = get_settings_path()
 	local attr = lfs.attributes(path)
-	if not attr then
-		lfs.mkdir(path)
-	elseif attr.mode ~= 'directory' then
+	if attr and (attr.mode ~= 'directory') then
 		emu.print_error(string.format('Error saving autofire settings: "%s" is not a directory', path))
 		return
 	end
@@ -85,6 +83,8 @@ function lib:save_settings(buttons)
 	if #buttons == 0 then
 		os.remove(filename)
 		return
+	elseif not attr then
+		lfs.mkdir(path)
 	end
 	local json = require('json')
 	local settings = serialize_settings(buttons)

plugins/autofire/init.lua

@@ -23,13 +23,12 @@ function autofire.startplugin()
 	--   'counter' - position in autofire cycle
 	local buttons = {}
 
+	local input_manager
 	local menu_handler
 
 	local function process_frame()
-		local input = manager.machine.input
-
 		local function process_button(button)
-			local pressed = input:seq_pressed(button.key)
+			local pressed = input_manager:seq_pressed(button.key)
 			if pressed then
 				local state = button.counter < button.on_frames and 1 or 0
 				button.counter = (button.counter + 1) % (button.on_frames + button.off_frames)
@@ -65,6 +64,8 @@ function autofire.startplugin()
 		if loader then
 			buttons = loader:load_settings()
 		end
+
+		input_manager = manager.machine.input
 	end
 
 	local function save_settings()
@@ -74,6 +75,7 @@ function autofire.startplugin()
 		end
 
 		menu_handler = nil
+		input_manager = nil
 		buttons = {}
 	end
 
@@ -87,7 +89,10 @@ function autofire.startplugin()
 
 	local function menu_populate()
 		if not menu_handler then
-			menu_handler = require('autofire/autofire_menu')
+			local status, msg = pcall(function () menu_handler = require('autofire/autofire_menu') end)
+			if not status then
+				emu.print_error(string.format('Error loading autofire menu: %s', msg))
+			end
 			if menu_handler then
 				menu_handler:init_menu(buttons)
 			end

plugins/inputmacro/inputmacro_persist.lua

@@ -101,7 +101,7 @@ end
 local lib = { }
 
 function lib:load_settings()
-	filename = settings_path() .. '/' .. settings_filename()
+	local filename = settings_path() .. '/' .. settings_filename()
 	local file = io.open(filename, 'r')
 	if not file then
 		return { }
@@ -127,17 +127,17 @@ end
 function lib:save_settings(macros)
 	local path = settings_path()
 	local stat = lfs.attributes(path)
-	if not stat then
-		lfs.mkdir(path)
-	elseif stat.mode ~= 'directory' then
+	if stat and (stat.mode ~= 'directory') then
 		emu.print_error(string.format('Error saving input macros: "%s" is not a directory', path))
 		return
 	end
-	filename = path .. '/' .. settings_filename()
+	local filename = path .. '/' .. settings_filename()
 
 	if #macros == 0 then
 		os.remove(filename)
 		return
+	elseif not stat then
+		lfs.mkdir(path)
 	end
 
 	local json = require('json')

src/frontend/mame/ui/menu.cpp

@@ -1032,7 +1032,7 @@ void menu::handle_keys(uint32_t flags, int &iptkey)
 	{
 		if (is_last_selected() && m_needs_prev_menu_item)
 		{
-			iptkey = IPT_UI_BACK;
+			iptkey = IPT_INVALID;
 			stack_pop();
 			if (is_special_main_menu())
 				machine().schedule_exit();
@@ -1059,6 +1059,7 @@ void menu::handle_keys(uint32_t flags, int &iptkey)
 	{
 		if (!custom_ui_back())
 		{
+			iptkey = IPT_INVALID;
 			stack_pop();
 			if (is_special_main_menu())
 				machine().schedule_exit();