This idea didn't work out as well as I thought it would, but I will post for entertainment value. There are a lot of ways to skin these cats... 
#!/usr/bin/perl -w
use strict;

my @data = do{local $/ = "\n["; (<DATA>)};
 
@data = map{ s/\n/ /g; s/\[//g; s/\]/ ==/g;  $_}@data;

print join "\n", @data;

=prints
2012/02/16 00:08:34 == 29 == ERRORMSG unknown error Can't insert into 
+price table Please check Valueprice.pm line 52. 
2012/02/16 00:08:34 == 39 == ERRORMSG Invalid User 
2012/02/16 00:14:52 == 105 == ERRORMSG missing conversion rate 
2012/02/16 00:14:52 == 29 == ERRORMSG Can't use an undefined value as 
+a HASH reference at Value.pm line 77. 
=cut

__DATA__
[2012/02/16 00:08:34] [29] ERRORMSG unknown error Can't insert into pr
+ice table
Please check
Valueprice.pm line 52.
[2012/02/16 00:08:34] [39] ERRORMSG Invalid User
[2012/02/16 00:14:52] [105] ERRORMSG missing conversion rate
[2012/02/16 00:14:52] [29] ERRORMSG Can't use an undefined value as a 
+HASH reference at Value.pm line 77.

[download]
Update:
I suppose the first two little regex's in the map could be replaced with a single tr
@data = map{ tr/\n[/ /d;  s/\]/ ==/g;  $_}@data;
tr is faster than regex because it is "lighter weight" meaning "dumber". It cannot substitute one character into two. But in this case performance appears not to be a significant factor - or at least that is not mentioned in the requirements.

My personal advice on parsing very regular program generated things like log files is to keep the regex complexity as low as possible - make it just as complicated as it needs to be and no more. If you are validating "user input" then the complexity level has to be more.

In reply to Re: Not able to capture information by Marshall
in thread Not able to capture information by Anonymous Monk

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