-extern int lib_ring_buffer_read_cstr(struct lib_ring_buffer_backend *bufb,
- size_t offset, void *dest, size_t len);
+extern int lib_ring_buffer_read_cstr(struct lttng_ust_lib_ring_buffer_backend *bufb,
+ size_t offset, void *dest, size_t len,
+ struct lttng_ust_shm_handle *handle);