hooks: add exit hook

Signed-off-by: koniu <gkusnierz@gmail.com>
Signed-off-by: Julien Danjou <julien@danjou.info>

awesome.c

@@ -63,6 +63,9 @@ awesome_atexit(void)
 {
     int screen_nbr, nscreens;
 
+    if(globalconf.hooks.exit != LUA_REFNIL)
+        luaA_dofunction_from_registry(globalconf.L, globalconf.hooks.exit, 0, 0);
+
     a_dbus_cleanup();
 
     /* reparent systray windows, otherwise they may die with their master */

hooks.c

@@ -214,6 +214,18 @@ luaA_hooks_timer(lua_State *L)
     return 1;
 }
 
+/** Set the function called on awesome exit
+ * \param L The Lua VM state.
+ * \return The number of elements pushed on stack.
+ * \luastack
+ * \lparam A function to call on awesome exit.
+ */
+static int
+luaA_hooks_exit(lua_State *L)
+{
+    HANDLE_HOOK(L, globalconf.hooks.exit);
+}
+
 #ifdef WITH_DBUS
 /** Set the function to be called when a D-Bus event is received.
  * The first argument passed to this function is the type of the message we
@@ -249,6 +261,7 @@ const struct luaL_reg awesome_hooks_lib[] =
     { "tagged", luaA_hooks_tagged },
     { "startup_notification", luaA_hooks_startup_notification },
     { "timer", luaA_hooks_timer },
+    { "exit", luaA_hooks_exit },
 #ifdef WITH_DBUS
     { "dbus", luaA_hooks_dbus },
 #endif

luaa.c

@@ -743,6 +743,7 @@ luaA_init(xdgHandle* xdg)
     globalconf.hooks.property = LUA_REFNIL;
     globalconf.hooks.startup_notification = LUA_REFNIL;
     globalconf.hooks.timer = LUA_REFNIL;
+    globalconf.hooks.exit = LUA_REFNIL;
 #ifdef WITH_DBUS
     globalconf.hooks.dbus = LUA_REFNIL;
 #endif

structs.h

@@ -122,6 +122,8 @@ struct awesome_t
         luaA_ref property;
         /** Command to run on time */
         luaA_ref timer;
+        /** Command to run on awesome exit */
+        luaA_ref exit;
         /** Startup notification hooks */
         luaA_ref startup_notification;
 #ifdef WITH_DBUS