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Top Forums Shell Programming and Scripting Awk Multiple Field Separators Post 49658 by google on Wednesday 7th of April 2004 07:04:46 AM
Old 04-07-2004
Awk takes input and creates "records" by delimiting by the value of RS. Awk delimits each "record" by the value of "FS", the field separator. You can then slice and dice each value of a field at your whim. In addition, if you dont have an easy way to split records and fields, Awk (gawk) allows you to define your own record by specifying column widths using the FIELDWIDTHS variable. Example
Code:
BEGIN  { FIELDWIDTHS = "9 6 10 6 7 7 35" }

.....will define a record of fixed width including whitespace between columns. So $1 is defined as a field of 9 bytes, $2 is defined as a field of 6 bytes and so on.

This is a pretty good tutorial on Awk. GNU Awk Tutorial

Last edited by rbatte1; 12-17-2019 at 10:05 AM..
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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