Usage of a variable in awk BEGIN Post: 303013702

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Top Forums Shell Programming and Scripting Usage of a variable in awk BEGIN Post 303013702 by nms on Monday 26th of February 2018 07:19:30 AM

02-26-2018

Registered User

Usage of a variable in awk BEGIN

Hi,

Code:

diffcount=`awk 'BEGIN { while ( getline < "/scripts/matt/text.server1.reference" ) { arr[$0]++ } } { if (!( $0 in arr ) ) { print } }' $TMPDIR/$(basename $0 .sh) | wc -l`
        if [[ $diffcount -eq 0 ]]; then
        OK="OK - No change in the interfaces status"
        elif [[ $diffcount -gt 0 ]]; then
        DIFF=`awk 'BEGIN { while ( getline < "/scripts/matt/text.server1.reference" ) { arr[$0]++ } } { if (!( $0 in arr ) ) { print } }' $TMPDIR/$(basename $0 .sh).$1 | awk -F "|" '{print$2,"("$3")"}' ORS=' ' |  awk '{for(i=1;i<NF;i++)if(i%2==0){$i=$i","} }1'

i have a part of a script where i can output the difference between two text files. If there is a difference it will output it in the same line, comma separated. All works well, apart that i cannot understand how a variable can be entered to represent the file path "/scripts/matt/ and the name of the file as $1 in script, where $1 = server1" as when i do that it fails. Note that after the getline function, the other file (in which text.server1.reference is being compared with) "$TMPDIR/$(basename $0 .sh)" works fine when pushed to a variable. So this should be something like:

Code:

diffcount=`awk 'BEGIN { while ( getline < "/$MATTDIR/text.$1.reference" ) { arr[$0]++ } } { if (!( $0 in arr ) ) { print } }' $TMPDIR/$(basename $0 .sh) | wc -l`

Can you insert variables in the getline part?

Rgds,

Matt

nms

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get_defined_vars

GET_DEFINED_VARS(3)							 1						       GET_DEFINED_VARS(3)

get_defined_vars - Returns an array of all defined variables

SYNOPSIS

       array get_defined_vars (void  )

DESCRIPTION

	This  function	returns  a  multidimensional array containing a list of all defined variables, be them environment, server or user-defined
       variables, within the scope that get_defined_vars(3) is called.

RETURN VALUES

	A multidimensional array with all the variables.

EXAMPLES

       Example #1

	      get_defined_vars(3) Example

	      <?php
	      $b = array(1, 1, 2, 3, 5, 8);

	      $arr = get_defined_vars();

	      // print $b
	      print_r($arr["b"]);

	      /* print path to the PHP interpreter (if used as a CGI)
	       * e.g. /usr/local/bin/php */
	      echo $arr["_"];

	      // print the command-line parameters if any
	      print_r($arr["argv"]);

	      // print all the server vars
	      print_r($arr["_SERVER"]);

	      // print all the available keys for the arrays of variables
	      print_r(array_keys(get_defined_vars()));
	      ?>

SEE ALSO

       isset(3), get_defined_functions(3), get_defined_constants(3).

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