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STREAMS Programming Guide Oracle Solaris 11.1 Information Library |
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STREAMS Programming Guide Oracle Solaris 11.1 Information Library |
Part I Application Programming Interface
2. STREAMS Application-Level Components
3. STREAMS Application-Level Mechanisms
4. Application Access to the STREAMS Driver and Module Interfaces
7. STREAMS Framework - Kernel Level
8. STREAMS Kernel-Level Mechanisms
11. Configuring STREAMS Drivers and Modules
14. Debugging STREAMS-based Applications
B. Kernel Utility Interface Summary
Certain system parameters referred to by STREAMS are configurable when building a new operating system (see the file /etc/system and the Oracle Solaris Administration: Common Tasks for further details). These parameters are:
Maximum number (should be at least 8) of modules that can be pushed onto a single stream.
Maximum number of bytes of information that a single system call can pass to a stream to be placed into the data part of a message (in M_DATA blocks). Any write(2) exceeding this size is broken into multiple messages. A putmsg(2) with a data part exceeding this size fails with ERANGE. If STRMSGSZ is set to 0, the number of bytes passed to a stream is infinite.
Maximum number of bytes of information that a single system call can pass to a stream to be placed into the control part of a message (in an M_PROTO or M_PCPROTO block). A putmsg(2) with a control part that exceeds this size fails with ERANGE.
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