- Dedication
- Foreword to the Third Edition
- Foreword to the Fourth Edition
- Preface
- I. The awk Language
- 1. Getting Started with awk
- 2. Running awk and gawk
- 3. Regular Expressions
- 4. Reading Input Files
- How Input Is Split into Records
- Examining Fields
- Nonconstant Field Numbers
- Changing the Contents of a Field
- Specifying How Fields Are Separated
- Reading Fixed-Width Data
- Defining Fields by Content
- Multiple-Line Records
- Explicit Input with getline
- Using getline with No Arguments
- Using getline into a Variable
- Using getline from a File
- Using getline into a Variable from a File
- Using getline from a Pipe
- Using getline into a Variable from a Pipe
- Using getline from a Coprocess
- Using getline into a Variable from a Coprocess
- Points to Remember About getline
- Summary of getline Variants
- Reading Input with a Timeout
- Directories on the Command Line
- Summary
- 5. Printing Output
- The print Statement
- print Statement Examples
- Output Separators
- Controlling Numeric Output with print
- Using printf Statements for Fancier Printing
- Redirecting Output of print and printf
- Special Files for Standard Preopened Data Streams
- Special Filenames in gawk
- Closing Input and Output Redirections
- Summary
- 6. Expressions
- Constants, Variables, and Conversions
- Operators: Doing Something with Values
- Truth Values and Conditions
- Function Calls
- Operator Precedence (How Operators Nest)
- Where You Are Makes a Difference
- Summary
- 7. Patterns, Actions, and Variables
- 8. Arrays in awk
- 9. Functions
- II. Problem Solving with awk
- 10. A Library of awk Functions
- 11. Practical awk Programs
- Running the Example Programs
- Reinventing Wheels for Fun and Profit
- A Grab Bag of awk Programs
- Finding Duplicated Words in a Document
- An Alarm Clock Program
- Transliterating Characters
- Printing Mailing Labels
- Generating Word-Usage Counts
- Removing Duplicates from Unsorted Text
- Extracting Programs from Texinfo Source Files
- A Simple Stream Editor
- An Easy Way to Use Library Functions
- Finding Anagrams from a Dictionary
- And Now for Something Completely Different
- Summary
- III. Moving Beyond Standard awk with gawk
- 12. Advanced Features of gawk
- 13. Internationalization with gawk
- 14. Debugging awk Programs
- 15. Arithmetic and Arbitrary-Precision Arithmetic with gawk
- 16. Writing Extensions for gawk
- Introduction
- Extension Licensing
- How It Works at a High Level
- API Description
- How gawk Finds Extensions
- Example: Some File Functions
- The Sample Extensions in the gawk Distribution
- File-Related Functions
- Interface to fnmatch()
- Interface to fork(), wait(), and waitpid()
- Enabling In-Place File Editing
- Character and Numeric values: ord() and chr()
- Reading Directories
- Reversing Output
- Two-Way I/O Example
- Dumping and Restoring an Array
- Reading an Entire File
- Extension Time Functions
- API Tests
- The gawkextlib Project
- Summary
- IV. Appendices
- A. The Evolution of the awk Language
- B. Installing gawk
- C. GNU General Public License
- Index
- Colophon
- Copyright
To my parents, for their love, and for the wonderful example they set for me.
To my wife Miriam, for making me complete. Thank you for building your life together with me.
To our children Chana, Rivka, Nachum, and Malka, for enrichening our lives in innumerable ways.
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