+int gpiotools_request_linehandle(const char *device_name, unsigned int *lines,
+ unsigned int nlines, unsigned int flag,
+ struct gpiohandle_data *data,
+ const char *consumer_label);
+int gpiotools_set_values(const int fd, struct gpiohandle_data *data);
+int gpiotools_get_values(const int fd, struct gpiohandle_data *data);
+int gpiotools_release_linehandle(const int fd);
+
+int gpiotools_get(const char *device_name, unsigned int line);
+int gpiotools_gets(const char *device_name, unsigned int *lines,
+ unsigned int nlines, struct gpiohandle_data *data);
+int gpiotools_set(const char *device_name, unsigned int line,
+ unsigned int value);
+int gpiotools_sets(const char *device_name, unsigned int *lines,
+ unsigned int nlines, struct gpiohandle_data *data);
+