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Full Discussion: How to Pass filename to AWK in bash script
Top Forums Shell Programming and Scripting How to Pass filename to AWK in bash script Post 302684441 by nixie on Thursday 9th of August 2012 02:58:24 PM
Old 08-09-2012
How to Pass filename to AWK in bash script (SOLVED)
I have written a script which works fine, to remove patterns contained in EXCLUDE.DAT from input.txt

Code:
awk 'BEGIN {n=0;while (getline < "EXCLUDE.DAT" > 0){ex[n]=$0;n++}}  {for(var in ex){print  var "-" ex[var] $0 ;i++}}' input.txt


The last problem I need to solve is how to pass the file EXCLUDE.DAT to the script from the shell so that EXCLUDE.DAT can be any file. Obviously

Code:
excludefile=somefile.dat
awk 'BEGIN {n=0;while (getline < "$excludefile" > 0){ex[n]=$0;n++}}  {for(var in ex){print  var "-" ex[var] $0 ;i++}}' input.txt

won't work because of the single quotes.

I also tried


Code:
excludefile=somefile.dat
awk -v EXF=${exludefile}  'BEGIN {n=0;while (getline < EXF > 0){ex[n]=$0;n++}}  {for(var in ex){print  var "-" ex[var] $0 ;i++}}' input.txt

which gives the error

awk: fatal: expression for `<' redirection has null string value

Any help or hints how to solve this would be much appreciated.
Last edited by nixie; 08-12-2012 at 11:44 AM.. Reason: Edited to mark (SOLVED)
 

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LEARN ABOUT DEBIAN

igawk

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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