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Top Forums Shell Programming and Scripting Evaluate Expression within awk Post 302916814 by Don Cragun on Friday 12th of September 2014 04:54:54 AM
Old 09-12-2014
The way you're doing it, command is a string; not an awk condition to be processed. Since the string $3 == hello is not an empty string and does not evaluate to "0", testing the string yields TRUE. The following should work but it gets a lot more complex if the operator you want varies from invocation to invocation rather than being a constant ==

Code:
field=3
value="hello" 

awk -F "^T" -v fn="$field" -v val="$value" '
{     if ( $fn == val )   {     print "hye"   } 
}' test

This User Gave Thanks to Don Cragun For This Post:
 

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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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