Learning the Korn Shell

Bill Rosenblatt, Arnold Robbins

412 pages, parution le 30/04/2002 (2^eme édition)

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Résumé

The Korn shell is an interactive command and scripting language for accessing Unix® and other computer systems. As a complete and high-level programming language in itself, it's been a favorite since it was developed in the mid 1980s by David G. Korn at AT&T Bell Laboratories. Knowing how to use it is an essential skill for serious Unix users. Learning the Korn Shell shows you how to use the Korn shell as a user interface and as a programming environment.

Writing applications is often easier and quicker with Korn than with other high-level languages. Because of this, the Korn shell is the most often used shell in commercial environments and among inexperienced users. There are two other widely used shells, the Bourne shell and the C shell. The Korn shell, or ksh, has the best features of both, plus many new features of its own. ksh can do much to enhance productivity and the quality of a user's work, both in interacting with the system, and in programming. The new version, ksh93, has the functionality of other scripting languages such as awk, icon, Perl, rexx, and tcl.

Learning the Korn Shell is the key to gaining control of the Korn shell and becoming adept at using it as an interactive command and scripting language. Prior programming experience is not required in order to understand the chapters on basic shell programming. Readers will learn how to write many applications more easily and quickly than with other high-level languages. In addition, readers will also learn about Unix utilities and the way the Unix operating system works in general. The authors maintain that you shouldn't have to be an internals expert to use and program the shell effectively.

The second edition covers all the features of the current version of the Korn shell, including many new features not in earlier versions of ksh93, making it the most up-to-date reference available on the Korn shell. It compares the current version of the Korn shell to several other Bourne-compatible shells, including several Unix emulation environments for MS-DOS and Windows. In addition, it describes how to download and build ksh93 from source code.

A solid offering for many years, this newly revised title inherits a long tradition of trust among computer professionals who want to learn or refine an essential skill.

1. Korn Shell Basics
What Is a Shell?
Scope of This Book
History of Unix Shells
Getting the 1993 Korn Shell
Interactive Shell Use
Files
Input and Output
Background Jobs
Special Characters and Quoting

2. Command-Line Editing
Enabling Command-Line Editing
The History File
Emacs Editing Mode
Vi Editing Mode
The hist Command
Finger Habits

3. Customizing Your Environment
The .profile File
Aliases
Options
Shell Variables
Customization and Subprocesses
Customization Hints

4. Basic Shell Programming
Shell Scripts and Functions
Shell Variables
Compound Variables
Indirect Variable References (namerefs)
String Operators
Command Substitution
Advanced Examples: pushd and popd

5. Flow Control
if/else
for
case
select
while and until

6. Command-Line Options and Typed Variables
Command-Line Options
Numeric Variables and Arithmetic
Arithmetic for
Arrays
typeset

7. Input/Output and Command-Line Processing
I/O Redirectors
String I/O
Command-Line Processing

8. Process Handling
Process IDs and Job Numbers
Job Control
Signals
trap
Coroutines
Shell Subprocesses and Subshells

9. Debugging Shell Programs
Basic Debugging Aids
A Korn Shell Debugger

10. Korn Shell Administration
Installing the Korn Shell as the Standard Shell
Environment Customization
Customizing the Editing Modes
System Security Features

Appendix A. Related Shells
Appendix B. Reference Information
Appendix C. Building ksh from Source Code
Appendix D. AT&T ast Source Code License Agreement

L'auteur - Bill Rosenblatt

Bill Rosenblatt is author of the the O'Reilly Nutshell Handbook(R) Learning the Korn Shell; co-author, with Deb Cameron, of Learning GNU Emacs; and a contributor to UNIX Power Tools. He is director of publishing systems at the Times Mirror Company in New York City and a columnist in SunWorld Online magazine on the World Wide Web. Bill received a B.S.E. from Princeton University and an M.S. and A.B.D. from the University of Massachusetts at Amherst, each in some variant of computer science. His interests in the computing field include multimedia databases, electronic publishing, and object- oriented systems. Outside of the computing field, he's interested in jazz, classical music, antique maps, and Sherlock Holmes pastiche novels. Bill lives on the Upper West Side of Manhattan. He wishes his landlord allowed pets so that he could truthfully claim to have a dog and cat with suitably droll names like "Coltrane" and "Ravel."

L'auteur - Arnold Robbins

Arnold Robbins, an Atlanta native, is a professional programmer and technical author. He is also a happy husband, the father of four very cute children, and an amateur Talmudist (Babylonian and Jerusalem). Since late 1997, he and his family have been living happily in Israel. Arnold has been working with Unix systems since 1980, when he was introduced to a PDP-11 running a version of Sixth Edition Unix. He has been a heavy awk user since 1987, when he became involved with gawk, the GNU project's version of awk. As a member of the POSIX 1003.2 balloting group, he helped shape the POSIX standard for awk. He is currently the maintainer of gawk and its documentation.

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Caractéristiques techniques

	PAPIER
Éditeur(s)	O'Reilly
Auteur(s)	Bill Rosenblatt, Arnold Robbins
Parution	30/04/2002
Édition	2^eme édition
Nb. de pages	412
Format	18 x 23,5
Couverture	Broché
Poids	717g
Intérieur	Noir et Blanc
EAN13	9780596001957
ISBN13	978-0-596-00195-7