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Top Forums Shell Programming and Scripting awk get search pattern from a file. Post 302666291 by togotutor on Wednesday 4th of July 2012 05:01:59 AM
Old 07-04-2012
awk get search pattern from a file.

Here Is a problem I am facing with awk.

Query --> I want to search for a string in a file and print next 15 lines below the matched string.

1.We do not have GNU grep so cannot use grep -A or grep -B commands.
2. Instead of passing the search pattern as a string to awk. I want the awk to read the pattern from a file.

This is the command which I am using:
Code:
cat fulldatafile.txt | awk 'c-->0;/'`cat IDnumber.txt`'/{c=17}'

So what I did:
cat the full data file (file which contains information associated with ID) and then using the awk command I want to search for the only single ID, the ID is in the IDnumberfile which is updated by an external program sometimes. Kindly, help me in finding out how to read a file to get the pattern.
 

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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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