+/* Iterator. */
+void *
+guestfs_first_private (guestfs_h *g, const char **key_rtn)
+{
+ if (g->pda == NULL)
+ return NULL;
+
+ g->pda_next = hash_get_first (g->pda);
+
+ /* Ignore any keys with NULL data pointers. */
+ while (g->pda_next && g->pda_next->data == NULL)
+ g->pda_next = hash_get_next (g->pda, g->pda_next);
+
+ if (g->pda_next == NULL)
+ return NULL;
+
+ *key_rtn = g->pda_next->key;
+ return g->pda_next->data;
+}
+
+void *
+guestfs_next_private (guestfs_h *g, const char **key_rtn)
+{
+ if (g->pda == NULL)
+ return NULL;
+
+ if (g->pda_next == NULL)
+ return NULL;
+
+ /* Walk to the next key with a non-NULL data pointer. */
+ do {
+ g->pda_next = hash_get_next (g->pda, g->pda_next);
+ } while (g->pda_next && g->pda_next->data == NULL);
+
+ if (g->pda_next == NULL)
+ return NULL;
+
+ *key_rtn = g->pda_next->key;
+ return g->pda_next->data;
+}
+