-int opkg_install_package (opkg_t *opkg, const char *package_name, opkg_progress_callback_t callback, void *user_data);
-int opkg_remove_package (opkg_t *opkg, const char *package_name, opkg_progress_callback_t callback, void *user_data);
-int opkg_upgrade_package (opkg_t *opkg, const char *package_name, opkg_progress_callback_t callback, void *user_data);
-int opkg_upgrade_all (opkg_t *opkg, opkg_progress_callback_t callback, void *user_data);
-int opkg_update_package_lists (opkg_t *opkg, opkg_progress_callback_t callback, void *user_data);
+int opkg_install_package (const char *package_name, opkg_progress_callback_t callback, void *user_data);
+int opkg_remove_package (const char *package_name, opkg_progress_callback_t callback, void *user_data);
+int opkg_upgrade_package (const char *package_name, opkg_progress_callback_t callback, void *user_data);
+int opkg_upgrade_all (opkg_progress_callback_t callback, void *user_data);
+int opkg_update_package_lists (opkg_progress_callback_t callback, void *user_data);