lua add ability to pass PLUGIN_ ret vals with os.exit() + add defines

Change-Id: I45998245271fbd8fee4534f8497b014025e4dcc7

apps/plugins/lua/rbdefines_helper.pl

@@ -50,6 +50,7 @@ if ($def_type eq "rb_defines") {
         '^SYS_(TIMEOUT|POWEROFF|BATTERY_UPDATE)$',
         '^SYS_USB_(DIS|)CONNECTED$',
         '^HOME_DIR$',
+        '^PLUGIN(_OK|_USB_CONNECTED|_POWEROFF|_GOTO_WPS|_GOTO_PLUGIN)$',
         '^PLUGIN_DIR$',
         '^PLUGIN(_APPS_|_GAMES_|_)DATA_DIR$',
         '^ROCKBOX_DIR$',

apps/plugins/lua/rocklua.c

@@ -175,9 +175,10 @@ static int loadfile_newstate(lua_State **L, const char *filename)
 static void lua_atexit(void)
 {
   char *filename;
-
+  int err_n;
   if(Ls && lua_gettop(Ls) > 1)
   {
+    err_n = lua_tointeger(Ls, -1); /* os.exit? */
     if (Ls == lua_touserdata(Ls, -1)) /* signal from restart_lua */
     {
       filename = (char *) malloc((MAX_PATH * 2) + 1);
@@ -195,7 +196,12 @@ static void lua_atexit(void)
       free(filename);
       plugin_start(NULL);
     }
-    else if (lua_tointeger(Ls, -1) != 0) /* os.exit */
+    else if (err_n >= PLUGIN_USB_CONNECTED) /* INTERNAL PLUGIN RETVAL */
+    {
+      lua_close(Ls);
+      _exit(err_n);  /* don't call exit handler */
+    }
+    else if (err_n != 0)
     {
 ERR_RUN:
       lu_status = LUA_ERRRUN;
@@ -205,7 +211,7 @@ ERR_RUN:
     else
       lua_close(Ls);
   }
-  _exit(0); /* don't call exit handler */
+  _exit(PLUGIN_OK); /* don't call exit handler */
 }
 
 /* split filename at argchar

apps/plugins/lua_scripts/return2WPS.lua

@@ -0,0 +1,19 @@
+--[[
+             __________               __   ___.
+   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+                     \/            \/     \/    \/            \/
+ $Id$
+ Example Lua Return to WPS on exit
+ Copyright (C) 2021 William Wilgus
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ as published by the Free Software Foundation; either version 2
+ of the License, or (at your option) any later version.
+ This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ KIND, either express or implied.
+]]--
+
+os.exit(rb.PLUGIN_GOTO_WPS)