• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 626
  • Last Modified:

Parse text file, look for string, remove other lines, replace string with known names

I am trying to see what the best way to do this. Either perl, batch, cscript or some other command line means.
I need to parse a multi-line text file which contains data like:
---------------------------------------------------------------------------------
Variable = .iso.org.dod.internet.private.enterprises.9.9.392.1.3.21.1.10.10.83.72.65.82.75.45.66.71.65.78.4151
Value    = String 123.123.123.248

Variable = .iso.org.dod.internet.private.enterprises.9.9.392.1.3.21.1.10.10.83.72.65.82.75.45.66.71.65.78.4154
Value    = String 123.123.123.240

End of MIB subtree.
---------------------------------------------------------------------------------

Then I need to only show the results that start with 123.123 so it looks like:
123.123.123.248
123.123.123.240
---------------------------------------------------------------------------------

I then would like to compare it to another source, either a flat file or even a SQL source that would contain a common name for that number and replace the number with the text.

Example:
123.123.123.248 would become                   Host248
123.123.123.240 would become                   Host240
---------------------------------------------------------------------------------
Results file would contain
Host248
Host240
---------------------------------------------------------------------------------
The results find/replace could be up to over 100 so doind a command line replace would be complex.

Thoughts and ideas welcomed.
0
edrz01
Asked:
edrz01
  • 4
  • 4
  • 3
1 Solution
 
Adam314Commented:

##I then would like to compare it to another source,
##either a flat file or even a SQL source
##If you load this into %cn
 
while(<>) {
    next unless /^Value\s*=\s*String\s*(.*)/;
    print "$cn{$1}\n";
}

Open in new window

0
 
gregcmcseCommented:
This could be done easily in either Perl or VBScript.  Is Perl your preference?
0
 
gregcmcseCommented:
This should be pretty much what you need:
my %ip_names;
 
open (IN,"myIPtoNAMEfile.txt");
 
	# Following assumes IP address to friendly names file is a CSV 
	# in this format:  123.123.123.240,Host240  [each host on its own line]
while (<IN>) {
	chomp;
	my ( $ip, $friendlyname ) = split(/,/);
	$ip_names{$ip} = $friendlyname;
}
close(IN);
 
open(OUT, "> myoutputfile.txt");
 
open (IN,"mylogfile.txt");
	#Value    = String 123.123.123.240
while (<IN>) {
	chomp;
	if ( /^Value\s*=\s*String\s*(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/ ) {
		print OUT $ip_names{$1} . "\n";
	}
}
close(IN);
 
close(OUT);

Open in new window

0
Cloud Class® Course: Microsoft Exchange Server

The MCTS: Microsoft Exchange Server 2010 certification validates your skills in supporting the maintenance and administration of the Exchange servers in an enterprise environment. Learn everything you need to know with this course.

 
gregcmcseCommented:
Note, I'd prefer to make sure we're seeing an IP address by validating that we're seeing 1-3 digits, a period, 1-3 digits, a period, 1-3 digits, a period, and 1-3 digits.  I'm assuming there could be other "Value = String" lines in the file.  It gets a little more complicated if there might be other IP addresses in the file that you don't wish to look up that are in the same format:
      Value    = String 123.123.123.240

If there are, let me know and we'll take a different approach.
0
 
edrz01Author Commented:
Gregcmcse,

I appreciate your help on this. I took your code snippet and created a file called myiptoname.txt file and put my IP's and hostnames seperated by a comma. When I ran the perl script it created a blank myoutputfile.txt - no data.

Also, what if I do have some IP's that have a 1 or 2 digit value for the last octet?
0
 
Adam314Commented:
Did you have your data in mylogfile.txt, formatted as in your original post?

Post your log file and ip to name file here.
0
 
edrz01Author Commented:
My source file is called VPNOUT.TXT and looks like this (minus the ------'s):
-----------------------
Variable = .iso.org.dod.internet.private.enterprises.9.9.392.1.3.21.1.10.10.83.72.65.82.75.45.66.71.65.78.4227
123.123.123.248

Variable = .iso.org.dod.internet.private.enterprises.9.9.392.1.3.21.1.10.10.83.72.65.82.75.45.66.71.65.78.4289
123.123.123..240

End of MIB subtree.
--------------------------------------
My myIPtoNAMEfile.txt looks like:
--------------------------------------
123.123.123.240,3P8-5019
123.123.123.248,3P8-5020
123.123.123.88,3S2-5034
123.123.123.96,3S2-5035
--------------------------------------

My (your code) looks like:
my %ip_names;
open (IN,"myIPtoNAMEfile.txt");
      # Following assumes IP address to friendly names file is a CSV
      # in this format:  123.123.123.240,Host240  [each host on its own line]
while (<IN>) {
      chomp;
      my ( $ip, $friendlyname ) = split(/,/);
      $ip_names{$ip} = $friendlyname;
}
close(IN);
open(OUT, "> myoutputfile.txt");
open (IN,"VPNOUT.txt");
      #Value    = String 123.123.123.240
while (<IN>) {
      chomp;
            print  $ip_names{$1};
      if ( /^Value\s*=\s*String\s*(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/ ) {
            print OUT $ip_names{$1} . "\n";
      }
}
close(IN);
close(OUT);
0
 
Adam314Commented:
This version also handles it correctly when there is no name for a given IP - it prints "<the_ip> - no name" (where <the_ip> is the ip address).

#!/usr/bin/perl
use strict;
use warnings;
 
my %ip_names;
open (my $in,"<myIPtoNAMEfile.txt") or die "ip2name: $!\n";
while (<$in>) {
	chomp;
	my @f=split/,/;
	next unless $#f>=1;
	$ip_names{$f[0]} = $f[1];
}
close($in);
 
 
open(my $out, ">output.txt") or die "output: $!\n";
open ($in,"VPNOUT.TXT");
while(<$in>) {
	chomp;
	next unless /(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})/;
	if(exists($ip_names{$1})) {print "$ip_names{$1}\n";}
	else {print "$1 - no name\n";}
}
close($in);
close($out);

Open in new window

0
 
edrz01Author Commented:
Perfect! Thank you so much!
0
 
edrz01Author Commented:
Adam...
I just realized that this was not updating the external file. When I try to add the print Out code it bombs.
How would I get the output to a file?
0
 
Adam314Commented:
       if(exists($ip_names{$1})) {print $out "$ip_names{$1}\n";}
        else {print $out "$1 - no name\n";}
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Cloud Class® Course: CompTIA Cloud+

The CompTIA Cloud+ Basic training course will teach you about cloud concepts and models, data storage, networking, and network infrastructure.

  • 4
  • 4
  • 3
Tackle projects and never again get stuck behind a technical roadblock.
Join Now