Effective awk programming (3rd ed.)
Arnold Robbins · O'Reilly & Associates, Inc. eBooks · 2001
Effective awk Programming delivers complete coverage of the gawk 3.1 language and the most up-to-date coverage of the POSIX standard for awk available anywhere. Author Arnold Robbins clearly distinguishes standard awk features from GNU awk (gawk)-specific features, shines light into many of the dark corners of the language, and devotes two full chapters to example programs. A brand new chapter is devoted to TCP/IP networking with gawk. This book is the official User's Guide for the GNU implementation of awk.