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Full Discussion: How to find ip addresses in logfiles?
Top Forums Shell Programming and Scripting How to find ip addresses in logfiles? Post 302506317 by LivinFree on Sunday 20th of March 2011 01:22:30 AM
Old 03-20-2011
OK, here's try #2:
Code:
#! /bin/bash

for file in /logs/logfile.*; do
	while read ip; do
		if [[ "${file#${file%??}}" == ".Z" ]]; then
			# This is a compressed file - it ends with .Z - use zgrep
			zgrep ${ip} ${file} >> ~/results/output_log_${ip}
		else
			# Not a .Z file - regular ol' grep
			grep ${ip} ${file} >> ~/results/output_log_${ip}
		fi
	done <iplist
done

In your example, you're redefining the "logfile" variable - only the last one will count. You could set an array or a simple list of files to loop through, though.

See mine above - it gathers the list of logfiles at run time and loops over each one, checks to see if it has a .Z (I assume you use that to mean compressed - it's typical but not necessarily true) to determine if it should run grep or zgrep, appends the output to the output_log_$ip file (append will create if necessary).

I haven't really tested it - does it work on your system with your data?
 

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LEARN ABOUT XFREE86

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
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