Writing Device Drivers

Entry Points for STREAMS Device Drivers

STREAMS is a separate programming model for writing a character driver. Devices that receive data asynchronously, such as terminal and network devices, are suited to a STREAMS implementation. STREAMS device drivers must provide the loading and autoconfiguration support described in Chapter 6, Driver Autoconfiguration. See the STREAMS Programming Guide for additional information on how to write STREAMS drivers.

The following table lists additional entry points that can be used by STREAMS device drivers. For other entry points, see Entry Points Common to All Drivers and Entry Points for Character Device Drivers.

Table 1–4 Entry Points for STREAMS Drivers

Entry Point 




See Description 

Coordinates the passing of messages from one queue to the next queue in a stream. Required, except for the side of the driver that reads data. Additional information: STREAMS Programming Guide



Manipulate messages in a queue. Additional information: STREAMS Programming Guide