+int serial_open(const char *pathname, int flags);
+int serial_close(int fd);
+int serial_flush(int fd);
+void *serial_backup_params(int fd);
+void serial_restore_params(int fd, void *backup);
+int serial_set_params(int fd, int speed, int bits, int parity, int stopbits,
+ int flowcontrol);
+
+/* libsigrok/hardware/common/misc.c */
+/* TODO: Should not be public. */
+int opendev2(int device_index, struct sigrok_device_instance **sdi,
+ libusb_device *dev, struct libusb_device_descriptor *des,
+ int *skip, uint16_t vid, uint16_t pid, int interface);
+int opendev3(struct sigrok_device_instance **sdi, libusb_device *dev,
+ struct libusb_device_descriptor *des,
+ uint16_t vid, uint16_t pid, int interface);