+ /*
+ * no unknown element was supplied, assume that we can just update
+ * an existing entry
+ */
+ if (o)
+ e = &o->e;
+ else
+ e = &s->e;
+
+ uci_add_history(ctx, p, UCI_CMD_CHANGE, section, option, value);
+ return uci_set_element_value(ctx, &e, value);
+
+notfound:
+ /*
+ * the entry that we need to update was not found,
+ * check if the search failed prematurely.
+ * this can happen if the package was not found, or if
+ * an option was supplied, but the section wasn't found
+ */
+ if (!p || (!s && option))
+ UCI_THROW(ctx, UCI_ERR_NOTFOUND);
+
+ /* now add the missing entry */
+ uci_add_history(ctx, p, UCI_CMD_ADD, section, option, value);
+ if (s)
+ uci_alloc_option(s, option, value);
+ else
+ uci_alloc_section(p, value, section);
+
+ return 0;
+}