STREAMS-UX Programmer's Guide (February 2007)

Overview
STREAMS Components
Chapter 1
12
STREAMS Components
A stream consists of the following components shown in Figure 1-1, “Stream with a STREAMS
Module.”Figure 1-2 on page 13 shows a stream without a STREAMS module.
•Stream head
• Modules (optional)
• Target device driver or pseudo-driver
Figure 1-1 Stream with a STREAMS Module
Stream Head
Driver
User Space
Kernel Space
UpstreamDownstream
User Application
Module