You might want to translate the dates into something more human readable and change the string extracted from the files, but here's a start: 
use FileHandle;

my $directory = 'c:\temp';
my @logfile;
my $handle;
my %number;
my $date;
my $string;

opendir LOGDIR, $directory
    or die "Unable to open $directory: $!";
@logfile = grep {/\.log$/} readdir(LOGDIR)        # only .log files
    or die "unable to read $directory: $!";

foreach my $logfile (@logfile) {
    unless ($handle = new FileHandle "<$directory/$logfile") {
        print "Unable to open $logfile: $!\n";
        next;
    }

    unless (read $handle, $string, 5, 0 ) {     # get first 5 bytes
        print "unable to read $logfile: $!\n";
        close $handle;
        next;
    }
    $date = (stat $handle)[9];        # get modify time
    close $handle;
    $number{"$string,$date"}++;

    print "$logfile --> $string,$date," . $number{"$string,$date"} . "
+.log\n";
    rename "$directory/$logfile", "$directory/$string,$date," . $numbe
+r{"$string,$date"} . ".log"
        or print "unable to rename $logfile: $!\n";
}

[download]
Have fun,
Carl Forde

In reply to this kinda what you're looking for? by cforde
in thread Modified Date, file renaming by ManicMantis

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