In this section, we discuss the various GAWK-specific variables. They are not available in the original AWK distribution. However, on modern Linux systems, generally these options will work because AWK is set as a symbolic link to the GAWK executable.
Learning AWK Programming
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Learning AWK Programming
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Overview of this book
AWK is one of the most primitive and powerful utilities which exists in all Unix and Unix-like distributions. It is used as a command-line utility when performing a basic text-processing operation, and as programming language when dealing with complex text-processing and mining tasks. With this book, you will have the required expertise to practice advanced AWK programming in real-life examples.
The book starts off with an introduction to AWK essentials. You will then be introduced to regular expressions, AWK variables and constants, arrays and AWK functions and more. The book then delves deeper into more complex tasks, such as printing formatted output in AWK, control flow statements, GNU's implementation of AWK covering the advanced features of GNU AWK, such as network communication, debugging, and inter-process communication in the GAWK programming language which is not easily possible with AWK.
By the end of this book, the reader will have worked on the practical implementation of text processing and pattern matching using AWK to perform routine tasks.
Table of Contents (11 chapters)
Preface
Free Chapter
Getting Started with AWK Programming
Working with Regular Expressions
AWK Variables and Constants
Working with Arrays in AWK
Printing Output in AWK
AWK Expressions
AWK Control Flow Statements
AWK Functions
GNU's Implementation of AWK – GAWK (GNU AWK)
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