int pkg_plugins_shutdown(void);
int pkg_plugins(struct pkg_plugin **plugin);
int pkg_plugin_set(struct pkg_plugin *p, pkg_plugin_key key, const char *str);
int pkg_plugin_display_loaded(void);
const char *pkg_plugin_get(struct pkg_plugin *p, pkg_plugin_key key);
void *pkg_plugin_func(struct pkg_plugin *p, const char *func);