ldb_msg_element_compare_name);
}
-/*
- shallow copy a message - copying only the elements array so that the caller
- can safely add new elements without changing the message
-*/
-struct ldb_message *ldb_msg_copy_shallow(TALLOC_CTX *mem_ctx,
+static struct ldb_message *ldb_msg_copy_shallow_impl(TALLOC_CTX *mem_ctx,
const struct ldb_message *msg)
{
struct ldb_message *msg2;
return NULL;
}
+/*
+ shallow copy a message - copying only the elements array so that the caller
+ can safely add new elements without changing the message
+*/
+struct ldb_message *ldb_msg_copy_shallow(TALLOC_CTX *mem_ctx,
+ const struct ldb_message *msg)
+{
+ struct ldb_message *msg2;
+ unsigned int i;
+
+ msg2 = ldb_msg_copy_shallow_impl(mem_ctx, msg);
+ if (msg2 == NULL) {
+ return NULL;
+ }
+
+ for (i = 0; i < msg2->num_elements; ++i) {
+ /*
+ * Mark this message's elements as sharing their values with the
+ * original message, so that we don't inadvertently modify or
+ * free them. We don't mark the original message element as
+ * shared, so the original message element should not be
+ * modified or freed while the shallow copy lives.
+ */
+ struct ldb_message_element *el = &msg2->elements[i];
+ el->flags |= LDB_FLAG_INTERNAL_SHARED_VALUES;
+ }
+
+ return msg2;
+}
/*
copy a message, allocating new memory for all parts
struct ldb_message *msg2;
unsigned int i, j;
- msg2 = ldb_msg_copy_shallow(mem_ctx, msg);
+ msg2 = ldb_msg_copy_shallow_impl(mem_ctx, msg);
if (msg2 == NULL) return NULL;
if (msg2->dn != NULL) {
goto failed;
}
}
+
+ /*
+ * Since we copied this element's values, we can mark them as
+ * not shared.
+ */
+ el->flags &= ~LDB_FLAG_INTERNAL_SHARED_VALUES;
}
return msg2;
*/
#define LDB_FLAG_INTERNAL_FORCE_UNIQUE_INDEX 0x100
+/*
+ * indicates that this element's values are shared with another element (for
+ * example, in a shallow copy of an ldb_message) and should not be freed
+ */
+#define LDB_FLAG_INTERNAL_SHARED_VALUES 0x200
+
/* an extended match rule that always fails to match */
#define SAMBA_LDAP_MATCH_ALWAYS_FALSE "1.3.6.1.4.1.7165.4.5.1"