better signal handling

main.c

@@ -9,9 +9,19 @@
 #include <X11/Xatom.h>
 #include <cairo.h>
 #include <cairo-xlib.h>
+#include <signal.h> 
 #include "config.h"
 #define VERSION "0.100"
 
+// --- Globals for Signal Handling ---
+volatile sig_atomic_t running = 1; // <--- Flag to control main loop
+
+// --- Signal Handler Function ---
+void handle_signal(int signum) { // <--- Simple handler to stop the loop
+    (void) signum;
+    running = 0;
+}
+
 typedef struct _rectangle {
     int pos_x;
     int pos_y;
@@ -183,7 +193,13 @@ int main(int argc, char** argv) {
                                     DefaultVisual(d, s),
                                     width, height);
     cairo_t *cr = cairo_create(surf);
-    while(1){
+
+    // --- Register Signal Handlers ---
+    signal(SIGINT, handle_signal);  // <--- Catch Ctrl+C
+    signal(SIGTERM, handle_signal); // <--- Catch standard termination signal
+
+    // --- Main Loop ---
+    while(running){ // <--- Changed loop condition
         drawFibbTime(cr, width, height);
         XChangeProperty(d, w, prop_root, XA_PIXMAP, 32, PropModeReplace,
             (unsigned char*) &pix, 1);
@@ -193,6 +209,9 @@ int main(int argc, char** argv) {
         XFlush(d);
         sleep(REFRESH_TIME);
     }
+
+    // --- Cleanup (Now reachable) ---
+    printf("\nFibonacci Clock: Shutting down gracefully...\n"); // Optional message
     cairo_destroy(cr);
     cairo_surface_destroy(surf);
     XFreePixmap(d, pix);