Here is a list of all documented struct and union fields with links to the struct/union documentation for each field:

### - u -

- u : DBusTypeReader , DBusTypeWriter , DBusMessageRealIter
- u16 : DBusBasicValue
- u32 : DBusBasicValue
- uid : DBusUserInfo , DBusStat
- unique_name : BusData
- unix_fd_negotiated : DBusAuth
- unix_fd_possible : DBusAuth
- unix_fd_value : DBusCounter
- unix_user_data : DBusTransport
- unix_user_function : DBusTransport
- unregister_function : DBusObjectSubtree , DBusObjectPathVTable
- unused_bytes_recovered : DBusTransport
- used_so_far : DBusMemBlock
- user_data : DBusMessageFilter , DBusObjectSubtree
- username : DBusUserInfo