fDataPort
if (fDataPort > 0) {
fDataPort, 0);
delete_port(fDataPort);
fDataPort = -1;
ssize_t size = read_port_etc(interface->fDataPort, &messageCode,
fDataPort = create_port(100, buffer);
if (fDataPort < 0)
return fDataPort;
fDataPort, 0);
port_id fDataPort;