Hop this is felling better now ... Michael Weber

--- gtk-sunlight-0.2.1/callbacks.c
+++ gtk-sunlight-0.2.1callbacks.c
@@ -19,6 +19,9 @@
 
 
 #include "support.h"
+#include <glib.h>
+#include <glib/gstdio.h>
+#include <stdlib.h>
 
 void button_sensitive (ChData *data, gboolean sensitive);
 void change_wallpaper (ChData *data);
@@ -94,21 +97,21 @@
 
 void cmd_ok_clicked ( GtkButton *button, ChData *data)
 {
-	FILE *file;	
 	int time_out;
-	gchar *contents;
+	gchar *contents = g_malloc(1002);
 	gchar *fname = g_strconcat(g_get_home_dir(), DIR_PROJECT, "/sunlight_options", NULL);
 	
 	gtk_widget_hide(data->main_window);
 
 	/*Saving gi_rd1 and gi_rd2 to a file under DIR_PROJECT*/
-	sprintf(contents, "%d %d", data->gi_rd1, data->gi_rd2);
+	snprintf(contents, 1000, "%d %d", data->gi_rd1, data->gi_rd2);
 	
 	g_file_set_contents(fname, contents, -1, NULL);
 	
 	change_wallpaper (data);
 	time_out = gtk_timeout_add(1800000, (GtkFunction) change_wallpaper, data);
 	
+	g_free(contents);
 	g_free(fname);
 }
 
@@ -118,7 +121,6 @@
 void
 change_wallpaper (ChData *data)
 {
-	FILE *file;
 	gchar *text1, *text2, *image_address, *set_wallpaper;
 	gchar *dir_wallpapers = g_strconcat(g_get_home_dir(), DIR_WALLPAPERS, NULL);
 	gchar *dir_project = g_strconcat(g_get_home_dir(), DIR_PROJECT, NULL);
@@ -183,7 +185,6 @@
 void
 chk_startup_toggled_cb (GtkToggleButton *togglebutton, ChData *data)
 {
-	FILE *file;	
 	gchar *contents = "[Desktop Entry]\nEncoding=UTF-8\nIcon=/usr/share/icons/hicolor/48x48/apps/gtk-sunlight.png\nName=Real-time Sunlight Wallpaper\nComment=World sunlight map every 30 minutes\nExec=gtk-sunlight --nodisplay\nTerminal=false\nType=Application\nCategories=Utility;\nStartupNotify=false\nHidden=false\nNoDisplay=false";
 	gchar *path_startup = g_strconcat(g_get_home_dir(), "/.config/autostart/", NULL);
 
--- gtk-sunlight-0.2.1/sunlight.c
+++ gtk-sunlight-0.2.1/sunlight.c
@@ -20,9 +20,15 @@
 #include "support.h"
 #include "errno.h"
 //#include "time.h"
+#include <glib.h>
+#include <glib/gstdio.h>
+#include <stdlib.h>
+#include <ctype.h>
 
 #define UI_FILE "/usr/share/sunlight/sunlight.glade"
 
+void change_wallpaper (ChData *data);
+
 gboolean
 make_dir(gchar *trail)
 {
@@ -78,7 +84,7 @@
 	GError     	*error = NULL;
 	gchar 		*option_file = g_strconcat(g_get_home_dir(), DIR_PROJECT, "/sunlight_options", NULL);
 	gchar 		*contents;
-	gint 		length;
+	gsize 		length;
 	int 		time_out;
 	
 	GOptionContext 	*context;
@@ -111,8 +117,8 @@
 	data = g_slice_new( ChData );
 
 	/* create project directories if necessary */
-	if (!make_dir(DIR_PROJECT)) return;
-	if (!make_dir(DIR_WALLPAPERS)) return;
+	if (!make_dir(DIR_PROJECT)) return 1;
+	if (!make_dir(DIR_WALLPAPERS)) return 1;
 
 	/* Check for sunlight_options file and getting gi_rd1 and gi_rd2*/
 	if (g_file_test(option_file, G_FILE_TEST_EXISTS)){