Thanks for the Help. I already tried the given regex and it's not working. Here is my Perl script. 
#!/usr/bin/perl

chdir("/tmp") or die "$!";
opendir (DIR, ".") or die "$!";
my @files = grep {/2010*/}  readdir DIR;
close DIR;
{   local @ARGV = @files;


foreach my $file (@files) 
{
   open(FILE,"/tmp/$file") or die "No file!";
        
###############################

while ($fields = <FILE>)
    {

    @logs = split (/ /,$fields); # split log fields by space.

            foreach $msg (@logs)

            { 
        
            #if ( $msg=~(/^msg="(.*?)"/))
            #if ( $msg=~(/msg=/))
            if ( $msg=~/\bmsg="[^"]*"/)
            #if ($message =~ /msg=\"+((?:([^:,]+):\s|)([^,]+?)\s*(?:\s
+*,.*?|))\"+/)
                {
                print "$msg\n";
                }
            }
   
        }
   close(FILE);

    }

}
close FILE;
exit(0);

[download]

And here is the log file format:
20 Nov 17:43:1 10 28 2010 02:18:33: date=2010-10-28 time=00:27:54 log_id=2 type=ips subtype=signature pri=alert fwver=040002 severity=medium carrier_ep="N/A" profile="IPS" src=X.X.X.X dst=X.X.X.X src_int="wan1" dst_int="internal" policyid=2 status=detected proto=17 service=1434/udp vd="root" count=1 src_port=111 dst_port=80 attack_id=10328 sensor="IPS_sensor" ref="http://www.fortinet.com/ids/VID10328" user="N/A" group="N/A" incident_serialno=2004954881 msg="database: MS.SQL.Server.Resolution.Service.Stack.Overflow"

Am I missing anything in my code, I tried debugging but could not do anything inside debugger.

In reply to Re^2: Perl Regex by cipher
in thread Perl Regex by cipher

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