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The Design and Implementation of the 4.4BSD Operating System

Marshall Kirk McKusick

Keith Bostic

Michael J. Karels

John S. Quarterman

The second chapter of the book, The Design and Implementation of the 4.4BSD Operating System is excerpted here with the permission of the publisher. No part of it may be further reproduced or distributed without the publisher's express written permission. The rest of the book explores the concepts introduced in this chapter in incredible detail and is an excellent reference for anyone with an interest in BSD UNIX. More information about this book is available from the publisher, with whom you can also sign up to receive news of related titles. Information about BSD courses is available from Kirk McKusick.

Table of Contents
2 Design Overview of 4.4BSD
2.1 4.4BSD Facilities and the Kernel
2.1.1 The Kernel
2.2 Kernel Organization
2.3 Kernel Services
2.4 Process Management
2.4.1 Signals
2.4.2 Process Groups and Sessions
2.5 Memory Management
2.5.1 BSD Memory-Management Design Decisions
2.5.2 Memory Management Inside the Kernel
2.6 I/O System
2.6.1 Descriptors and I/O
2.6.2 Descriptor Management
2.6.3 Devices
2.6.4 Socket IPC
2.6.5 Scatter/Gather I/O
2.6.6 Multiple Filesystem Support
2.7 Filesystems
2.8 Filestores
2.9 Network Filesystem
2.10 Terminals
2.11 Interprocess Communication
2.12 Network Communication
2.13 Network Implementation
2.14 System Operation
List of Tables
2-1. Machine-independent software in the 4.4BSD kernel
2-2. Machine-dependent software for the HP300 in the 4.4BSD kernel
List of Figures
2-1. Process lifecycle
2-2. A small filesystem

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