STREAMS-UX Programmer's Guide (February 2007)

Differences Between STREAMS/UX and System V Release 4 STREAMS
HP-UX Changes to STREAMS/UX Drivers and Modules
Appendix E
271
The sc provides auxiliary functions for the sad driver.
timod
Module ID Number: 5006
Maximum Packet Size: INFPSZ
Minimum Packet Size: 0
High Water Mark: 2048
Low Water Mark: 128
The timod provides TLI functionality as described in the UNIX SVR4.2 System Files and Devices Reference
manual.
tirdwr
Module ID Number: 0
Maximum Packet Size: INFPSZ
Minimum Packet Size: 0
High Water Mark: 16384
Low Water Mark: 128
The tirdwr provides an alternative interface to the TLI library for accessing a transport protocol provider.
The tirdwr is described in the UNIX SVR4.2 System Files and Devices Reference manual.
Stream Head
Module ID Number: 0
Module Name: sth
Maximum Packet Size: INFPSZ
Minimum Packet Size: 0
High Water Mark: 65536
Low Water Mark: 8192
The Stream head provides the interface between HP-UX system calls and STREAMS/UX utilities in the
kernel. The Stream head is the first queue pair of every Stream and is involved in flow control. Data being
read from a stream will be taken off the stream head.
pipemod
Module ID Number: 5303
Maximum Packet Size: 8192
Minimum Packet Size: 0
High Water Mark: 16384
Low Water Mark: 8192