退出时清理 xcb 按键资源避免内存泄露

src/xcb/xcb.c

@@ -10,6 +10,7 @@
 #include <xcb/xcb_ewmh.h>
 #include <xcb/xcb_icccm.h>
 #include <xcb/xcb_image.h>
+#include <xcb/xcb_keysyms.h>
 #include <xcb/xinerama.h>
 #include <xcb/xproto.h>
 
@@ -288,9 +289,11 @@ void clean_xcb(void) {
   focus_window(XCB_WINDOW_NONE);
   clean_xcb_cursor();
   clean_ewmh_extension();
+  if (key_symbols) xcb_key_symbols_free(key_symbols);
   xcb_disconnect(conn);
   conn = NULL;
   screen = NULL;
+  key_symbols = NULL;
 }
 
 void grab_keybindings(const keybinding_t *keys, const size_t length) {
@@ -310,6 +313,7 @@ void grab_keybindings(const keybinding_t *keys, const size_t length) {
     keycode = xcb_key_symbols_get_keycode(key_symbols, keysym);
     modifiers = keys[i].modifiers;
     cookie = xcb_grab_key(conn, key, root, modifiers, *keycode, mode, mode);
+    free(keycode);
     error = xcb_request_check(conn, cookie);
     if (error) {
       clean_xcb();