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The Design and Implementation of the
FreeBSD
®
Operating System
Second Edition
Marshall Kirk McKusick
George V. Neville-Neil
Robert N.M. Watson
Upper Saddle River, NJ • Boston • Indianapolis • San Francisco
New York • Toronto • Montreal • London • Munich • Paris • Madrid
Capetown • Sydney • Tokyo • Singapore • Mexico City
UNIX is a registered trademark of X/Open in the United States and other countries. FreeBSD
and the FreeBSD logo used on the cover of this book are registered and unregistered trademarks
of the FreeBSD Foundation and are used by Pearson Education with the permission of the
FreeBSD Foundation. Many of the designations used by manufacturers and sellers to
distinguish their products are claimed as trademarks. Where those designations appear in this
book, and Pearson was aware of a trademark claim, the designations have been printed with
initial capital letters or in all capitals.
The authors and publisher have taken care in the preparation of this book, but make no
expressed or implied warranty of any kind and assume no responsibility for errors or omissions.
No liability is assumed for incidental or consequential damages in connection with or arising out
of the use of the information or programs contained herein.
For information about buying this title in bulk quantities, or for special sales opportunities
(which may include electronic versions; custom cover designs; and content particular to your
business, training goals, marketing focus, or branding interests), please contact our corporate
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Library of Congress Cataloging-in-Publication Data
McKusick, Marshall Kirk.
The design and implementation of the FreeBSD operating system / Marshall
Kirk McKusick, George V. Neville-Neil, Robert N. M. Watson.
pages cm
Includes bibliographical references and index.
ISBN-13: 978-0-321-96897-5 (hardcover : alk. paper)
ISBN-10: 0-321-96897-2 (hardcover : alk. paper)
1. FreeBSD. 2. Free computer software. 3. Operating systems (Computers)
I. Neville-Neil, George V. II. Watson, Robert N. M. III. Title.
QA76.774.F74M35 2014
005.4’32—dc23 2014020072
Copyright © 2015 by Pearson Education, Inc.
All rights reserved. Printed in the United States of America. This publication is protected by
copyright, and permission must be obtained from the publisher prior to any prohibited
reproduction, storage in a retrieval system, or transmission in any form or by any means,
electronic, mechanical, photocopying, recording, or likewise. To obtain permission to use
material from this work, please submit a written request to Pearson Education, Inc.,
Permissions Department, One Lake Street, Upper Saddle River, New Jersey 07458, or you may
fax your request to (201) 236-3290.
ISBN-13: 978-0-321-96897-5
ISBN-10: 0-321-96897-2
Text printed on recycled and acid-free paper at Courier in Westford, Massachusetts.
First Printing, September 2014
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Dedication
This book is dedicated to the BSD community.
Without the contributions of that community’s members,
there would be nothing about which to write.
