struct lttng_directory_handle {
int dirfd;
};
+
+static inline
+int lttng_directory_handle_get_dirfd(
+ const struct lttng_directory_handle *handle)
+{
+ return handle->dirfd;
+}
+
#else
struct lttng_directory_handle {
char *base_path;
/*
* Initialize a directory handle to the provided path. Passing a NULL path
- * returns a handle to the current working directory. The working directory
- * is not sampled; it will be accessed at the time of use of the functions
- * of this API.
+ * returns a handle to the current working directory.
*
* An initialized directory handle must be finalized using
* lttng_directory_handle_fini().
int lttng_directory_handle_init(struct lttng_directory_handle *handle,
const char *path);
+/*
+ * Initialize a new directory handle to a path relative to an existing handle.
+ *
+ * The provided path must already exist. Note that the creation of a
+ * subdirectory and the creation of a handle are kept as separate operations
+ * to highlight the fact that there is an inherent race between the creation of
+ * a directory and the creation of a handle to it.
+ *
+ * Passing a NULL path effectively copies the original handle.
+ *
+ * An initialized directory handle must be finalized using
+ * lttng_directory_handle_fini().
+ */
+LTTNG_HIDDEN
+int lttng_directory_handle_init_from_handle(
+ struct lttng_directory_handle *new_handle,
+ const char *path,
+ const struct lttng_directory_handle *handle);
+
+/*
+ * Initialize a new directory handle from an existing directory fd.
+ *
+ * The new directory handle assumes the ownership of the directory fd.
+ * Note that this method should only be used in very specific cases, such as
+ * re-creating a directory handle from a dirfd passed over a unix socket.
+ *
+ * An initialized directory handle must be finalized using
+ * lttng_directory_handle_fini().
+ */
LTTNG_HIDDEN
int lttng_directory_handle_init_from_dirfd(
struct lttng_directory_handle *handle, int dirfd);
+/*
+ * Copy a directory handle.
+ */
+LTTNG_HIDDEN
+int lttng_directory_handle_copy(const struct lttng_directory_handle *handle,
+ struct lttng_directory_handle *new_copy);
+
+/*
+ * Move a directory handle. The original directory handle may no longer be
+ * used after this call. This call cannot fail; directly assign the
+ * return value to the new directory handle.
+ *
+ * It is safe (but unnecessary) to call lttng_directory_handle_fini on the
+ * original handle.
+ */
+LTTNG_HIDDEN
+struct lttng_directory_handle
+lttng_directory_handle_move(struct lttng_directory_handle *original);
+
/*
* Release the resources of a directory handle.
*/