Preface

ChorusOS 4.0 Migration Guide provides information about:

• The major differences between version 3.2 and version 4.0 of the ChorusOS operating system.

• Porting your existing software applications and drivers.

• How to write new software applications and drivers.

This book assumes you are familiar with the ChorusOS operating system and the C programming language.

Who Should Use This Book

Read the ChorusOS 4.0 Migration Guide if you are:

• Interested in migrating software applications or drivers from the ChorusOS 3.2 operating system to the ChorusOS 4.0 operating system.

Before You Read This Book

If you are considering migrating your applications or drivers to the ChorusOS 4.0 operating system, and you are not familiar with ChorusOS, you must first read:

• ChorusOS 4.0 Introduction. This book introduces the features and components of the ChorusOS operating system.

• ChorusOS 4.0 Device Driver Framework Guide. This book describes the device driver architecture of the ChorusOS operating system and explains how to add a new driver.

How This Book Is Organized

This book consists of the following chapters:

Chapter 1, Overview of Enhancements to the ChorusOS 4.0 Operating System provides an overview of the major changes between version 3.2 and version 4.0 of the ChorusOS operating system, and also lists the APIs which are new, or have changed, since version 3.2.

Chapter 2, ChorusOS 4.0 Operating System Design Changes lists the changes and new features in the design of the operating system.

Chapter 3, ChorusOS 4.0 Library Changes lists the changes and new features in the operating system libraries.

Chapter 4, ChorusOS 4.0 Kernel Changes lists the changes and new features in the operating system kernel.

Chapter 5, ChorusOS 4.0 Build Tool Changes lists the changes and new features in the build tools.

Related Books

The following books contain additional information about version 4.0 of the ChorusOS operating system to help you with migration:

• The ChorusOS 4.0 Hot Restart Programmer's Guide. This book describes how to develop applications to use the hot restart functionality of the ChorusOS operating system.

• ChorusOS 4.0 Flash Guide. This book describes the support for flash memory provided in the ChorusOS operating system and explains how to use it.

Ordering Sun Documents

Fatbrain.com, an Internet professional bookstore, stocks selected product documentation from Sun Microsystems, Inc.

For a list of documents and how to order them, visit the Sun Documentation Center on Fatbrain.com at http://www1.fatbrain.com/documentation/sun.

Accessing Sun Documentation Online

The docs.sun.com^SM Web site enables you to access Sun technical documentation online. You can browse the docs.sun.com archive or search for a specific book title or subject. The URL is http://docs.sun.com.

What Typographic Conventions Mean

The following table describes the typographic changes used in this book.

Table P-1 Typographic Conventions

Typeface or Symbol	Meaning	Example
AaBbCc123	The names of commands, files, and directories; on-screen computer output	Edit your .login file. Use ls -a to list all files. machine_name% you have mail.
AaBbCc123	What you type, contrasted with on-screen computer output	machine_name% su Password:
AaBbCc123	Command-line placeholder: replace with a real name or value	To delete a file, type rm filename.
AaBbCc123	Book titles, new words, or terms, or words to be emphasized.	Read Chapter 6 in User's Guide. These are called class options. You must be root to do this.
Name(Section)	Name(Section)	See man(1) for more information.

Shell Prompts in Command Examples

The following table shows the default system prompt and superuser prompt for the C shell, Bourne shell, and Korn shell.

Table P-2 Shell Prompts

Shell	Prompt
C shell prompt	machine_name%
C shell superuser prompt	machine_name#
Bourne shell and Korn shell prompt	$
Bourne shell and Korn shell superuser prompt	#