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Top Forums Shell Programming and Scripting Paste columns based on common column: multiple files Post 303009545 by RudiC on Friday 15th of December 2017 01:54:34 PM
Old 12-15-2017
In awk, input lines are counted in the (internal) NR variable across ALL files, while FNR does the same but is reset for every new file. So FNR==1 indicates the begin of a new file, and the (user defined) file count FC is incremented.
I highly recommend to do some reading on awk, e.g. man awk. There, all system variables are listed and you can tell them from user vars like TF and SEQ that are declared and allocated when needed.
The square brackets [...] enclose array indices, so LINE and SEQ are arrays, holding the output lines and the order in which to print them. SN is a scalar serial number.
 

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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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