ブックレビュー社
Kornシェルについて解説。シェル・プログラミングに役立つコマンドやプログラム例を豊富に掲載 シェルとは,UNIX上でユーザーとの対話を処理するプログラム。UNIXを利用するシステム・エンジニアやプログラマが主な想定読者である。筆者は,「Kornシェルは強力な機能を持っているにもかかわらず過小評価されている」と主張。UNIXとうまく付き合うには利用するシェルの選択がもっとも重要で,Kornシェルは主要な選択肢に入るという。Kornシェルのプログラミングの基本や環境のカスタマイズ方法などを説明し,日常的な仕事を自動化したり,システム・ユーティリティとして機能するシェル・スクリプトの書き方を解説した。プログラミングに関する主な内容は,フロー制御構造,コマンド・ライン・オプション,入出力処理とコマンドライン処理,プロセス処理,デバッグ・ツール,セキュリティを含む管理方法,などである。巻末の付録には,BourneシェルやBashなどのUNIXの他のシェルとの比較や,Kornシェルの各種コマンド・オプションのリファレンスを掲載した。 (ブックレビュー社)
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内容説明
The Korn shell is an interactive command and scripting language for accessing Unix(r) 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.
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