Add lua_shutdown_hook.

doc/config_settings.xml

@@ -370,6 +370,24 @@
         <listitem>Loads the Lua scripts separated by spaces. 
         <para /></listitem>
     </varlistentry>
+    <varlistentry>
+        <term>
+            <command>
+                <option>lua_shutdown_hook</option>
+            </command>
+            <option>function_name [function arguments]</option>
+        </term>
+        <listitem>
+            <para>This function, if defined, will be called by
+            Conky at shutdown or when the configuration is
+            reloaded. Use this hook to clean up after yourself,
+            such as freeing memory which has been allocated by
+            external libraries via Lua. Conky puts 'conky_' in
+            front of function_name to prevent accidental calls to
+            the wrong function unless you put you place 'conky_' in
+            front of it yourself.</para>
+        </listitem>
+    </varlistentry>
     <varlistentry>
         <term>
             <command>

extras/nano/conky.nanorc

@@ -5,7 +5,7 @@
 syntax "conky" "(\.*conkyrc.*$|conky.conf)"
 
 ## Configuration items
-color green "\<(alignment|append_file|background|border_inner_margin|border_outer_margin|border_width|color0|color1|color2|color3|color4|color5|color6|color7|color8|color9|colorN|cpu_avg_samples|default_bar_size|default_color|default_gauge_size|default_graph_size|default_outline_color|default_shade_color|diskio_avg_samples|display|double_buffer|draw_borders|draw_graph_borders|draw_outline|draw_shades|extra_newline|font|format_human_readable|gap_x|gap_y|if_up_strictness|imap|imlib_cache_flush_interval|imlib_cache_size|lua_draw_hook_post|lua_draw_hook_pre|lua_load|mail_spool|max_port_monitor_connections|max_specials|max_user_text|maximum_width|minimum_size|mpd_host|mpd_password|mpd_port|music_player_interval|net_avg_samples|no_buffers|out_to_console|out_to_ncurses|out_to_stderr|out_to_x|override_utf8_locale|overwrite_file|own_window|own_window_class|own_window_colour|own_window_hints|own_window_title|own_window_transparent|own_window_type|pad_percents|pop3|sensor_device|short_units|show_graph_range|show_graph_scale|stippled_borders|temperature_unit|template|template0|template1|template2|template3|template4|template5|template6|template7|template8|template9|text|text_buffer_size|top_cpu_separate|top_name_width|total_run_times|update_interval|update_interval_on_battery|uppercase|use_spacer|use_xft|xftalpha|xftfont)\>"
+color green "\<(alignment|append_file|background|border_inner_margin|border_outer_margin|border_width|color0|color1|color2|color3|color4|color5|color6|color7|color8|color9|colorN|cpu_avg_samples|default_bar_size|default_color|default_gauge_size|default_graph_size|default_outline_color|default_shade_color|diskio_avg_samples|display|double_buffer|draw_borders|draw_graph_borders|draw_outline|draw_shades|extra_newline|font|format_human_readable|gap_x|gap_y|if_up_strictness|imap|imlib_cache_flush_interval|imlib_cache_size|lua_draw_hook_post|lua_draw_hook_pre|lua_load|lua_shutdown_hook|mail_spool|max_port_monitor_connections|max_specials|max_user_text|maximum_width|minimum_size|mpd_host|mpd_password|mpd_port|music_player_interval|net_avg_samples|no_buffers|out_to_console|out_to_ncurses|out_to_stderr|out_to_x|override_utf8_locale|overwrite_file|own_window|own_window_class|own_window_colour|own_window_hints|own_window_title|own_window_transparent|own_window_type|pad_percents|pop3|sensor_device|short_units|show_graph_range|show_graph_scale|stippled_borders|temperature_unit|template|template0|template1|template2|template3|template4|template5|template6|template7|template8|template9|text|text_buffer_size|top_cpu_separate|top_name_width|total_run_times|update_interval|update_interval_on_battery|uppercase|use_spacer|use_xft|xftalpha|xftfont)\>"
 
 ## Configuration item constants
 color yellow "\<(above|below|bottom_left|bottom_right|bottom_middle|desktop|dock|no|none|normal|override|skip_pager|skip_taskbar|sticky|top_left|top_right|top_middle|middle_left|middle_right|undecorated|yes)\>"

extras/vim/syntax/conkyrc.vim

@@ -12,7 +12,7 @@ endif
 
 syn region ConkyrcComment start=/^\s*#/ end=/$/
 
-syn keyword ConkyrcSetting alignment append_file background border_inner_margin border_outer_margin border_width color0 color1 color2 color3 color4 color5 color6 color7 color8 color9 colorN cpu_avg_samples default_bar_size default_color default_gauge_size default_graph_size default_outline_color default_shade_color diskio_avg_samples display double_buffer draw_borders draw_graph_borders draw_outline draw_shades extra_newline font format_human_readable gap_x gap_y if_up_strictness imap imlib_cache_flush_interval imlib_cache_size lua_draw_hook_post lua_draw_hook_pre lua_load mail_spool max_port_monitor_connections max_specials max_user_text maximum_width minimum_size mpd_host mpd_password mpd_port music_player_interval net_avg_samples no_buffers out_to_console out_to_ncurses out_to_stderr out_to_x override_utf8_locale overwrite_file own_window own_window_class own_window_colour own_window_hints own_window_title own_window_transparent own_window_type pad_percents pop3 sensor_device short_units show_graph_range show_graph_scale stippled_borders temperature_unit template template0 template1 template2 template3 template4 template5 template6 template7 template8 template9 text text_buffer_size top_cpu_separate top_name_width total_run_times update_interval update_interval_on_battery uppercase use_spacer use_xft xftalpha xftfont
+syn keyword ConkyrcSetting alignment append_file background border_inner_margin border_outer_margin border_width color0 color1 color2 color3 color4 color5 color6 color7 color8 color9 colorN cpu_avg_samples default_bar_size default_color default_gauge_size default_graph_size default_outline_color default_shade_color diskio_avg_samples display double_buffer draw_borders draw_graph_borders draw_outline draw_shades extra_newline font format_human_readable gap_x gap_y if_up_strictness imap imlib_cache_flush_interval imlib_cache_size lua_draw_hook_post lua_draw_hook_pre lua_load lua_shutdown_hook mail_spool max_port_monitor_connections max_specials max_user_text maximum_width minimum_size mpd_host mpd_password mpd_port music_player_interval net_avg_samples no_buffers out_to_console out_to_ncurses out_to_stderr out_to_x override_utf8_locale overwrite_file own_window own_window_class own_window_colour own_window_hints own_window_title own_window_transparent own_window_type pad_percents pop3 sensor_device short_units show_graph_range show_graph_scale stippled_borders temperature_unit template template0 template1 template2 template3 template4 template5 template6 template7 template8 template9 text text_buffer_size top_cpu_separate top_name_width total_run_times update_interval update_interval_on_battery uppercase use_spacer use_xft xftalpha xftfont
 
 syn keyword ConkyrcConstant
 			\ above

src/conky.c

@@ -7780,6 +7780,7 @@ void clean_up(void *memtofree1, void* memtofree2)
 	weather_free_info();
 #endif
 #ifdef HAVE_LUA
+	llua_shutdown_hook();
 	llua_close();
 #endif /* HAVE_LUA */
 
@@ -8931,6 +8932,13 @@ char load_config_file(const char *f)
 				CONF_ERR;
 			}
 		}
+		CONF("lua_shutdown_hook") {
+			if (value) {
+				llua_set_shutdown_hook(value);
+			} else {
+				CONF_ERR;
+			}
+		}
 #endif /* X11 */
 #endif /* HAVE_LUA */
 

src/llua.c

@@ -39,8 +39,9 @@ void llua_rm_notifies(void);
 static int llua_block_notify = 0;
 #endif /* HAVE_SYS_INOTIFY_H */
 
-static char *draw_pre = 0;
+static char *draw_pre_hook = 0;
-static char *draw_post = 0;
+static char *draw_post_hook = 0;
+static char *shutdown_hook = 0;
 
 lua_State *lua_L = NULL;
 
@@ -287,13 +288,13 @@ void llua_close(void)
 #ifdef HAVE_SYS_INOTIFY_H
 	llua_rm_notifies();
 #endif /* HAVE_SYS_INOTIFY_H */
-	if (draw_pre) {
+	if (draw_pre_hook) {
-		free(draw_pre);
+		free(draw_pre_hook);
-		draw_pre = 0;
+		draw_pre_hook = 0;
 	}
-	if (draw_post) {
+	if (draw_post_hook) {
-		free(draw_post);
+		free(draw_post_hook);
-		draw_post = 0;
+		draw_post_hook = 0;
 	}
 	if(!lua_L) return;
 	lua_close(lua_L);
@@ -391,24 +392,35 @@ void llua_set_number(const char *key, double value)
 #ifdef X11
 void llua_draw_pre_hook(void)
 {
-	if (!lua_L || !draw_pre) return;
+	if (!lua_L || !draw_pre_hook) return;
-	llua_do_call(draw_pre, 0);
+	llua_do_call(draw_pre_hook, 0);
 }
 
 void llua_draw_post_hook(void)
 {
-	if (!lua_L || !draw_post) return;
+	if (!lua_L || !draw_post_hook) return;
-	llua_do_call(draw_post, 0);
+	llua_do_call(draw_post_hook, 0);
+}
+
+void llua_shutdown_hook(void)
+{
+	if (!lua_L || !shutdown_hook) return;
+	llua_do_call(shutdown_hook, 0);
 }
 
 void llua_set_draw_pre_hook(const char *args)
 {
-	draw_pre = strdup(args);
+	draw_pre_hook = strdup(args);
 }
 
 void llua_set_draw_post_hook(const char *args)
 {
-	draw_post = strdup(args);
+	draw_post_hook = strdup(args);
+}
+
+void llua_set_shutdown_hook(const char *args)
+{
+	shutdown_hook = strdup(args);
 }
 
 #ifdef LUA_EXTRAS

src/llua.h

@@ -54,8 +54,11 @@ void llua_inotify_query(int wd, int mask);
 #ifdef X11
 void llua_draw_pre_hook(void);
 void llua_draw_post_hook(void);
+void llua_shutdown_hook(void);
+
 void llua_set_draw_pre_hook(const char *args);
 void llua_set_draw_post_hook(const char *args);
+void llua_set_shutdown_hook(const char *args);
 
 void llua_setup_window_table(int text_start_x, int text_start_y, int text_width, int text_height);
 void llua_update_window_table(int text_start_x, int text_start_y, int text_width, int text_height);