Control modes

The control-modes field c_cflag specifies communication control for terminals. The value of c_cflag controls characteristics of the communications-port to a terminal-device, but the underlying hardware may fail to support all c_cflag values (see ``Control modes'' in termio(7)). A communication-port other than an asynchronous serial connection may ignore some of the control-modes; for example, if an attempt is made to set the baud-rate on a network-connection to a terminal on another host, the baud-rate may or may not be set on the connection between the terminal and the machine it is directly connected to.