Part of what you want is a simple loop: 
foreach my $file ("$LOGDIR\\sec-ghost01-12-09-2004-21-43.csv",
                  "$LOGDIR\\sec-ghost01-12-10-2004-21-43.csv",
                  "$LOGDIR\\sec-ghost01-12-11-2004-21-43.csv")
{
  open(INPUT,"< $file")
    or die "Can't open '$file': $!\n";
  while (my $line = <INPUT>)
  {
    chomp($line);
    # process
  }
}

[download]

If you don't want to list the files explicitly, you'll want to use opendir and readdir, or else follow Zed_Lopez's suggestion and use glob.

In reply to Re: Opening multiple files for input by sgifford
in thread Opening multiple files for input by meenac

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