mdw@git.distorted.org.uk Git - dvdrip/blob - distill

   1 #! /usr/bin/perl
   2
   3 use autodie;
   4
   5 my $ZERO = "\0" x 2048;
   6 for my $f (@ARGV) {
   7   open my $fh, "<", $f; binmode $fh;
   8   my $buf;
   9   my $i = 0;
  10   SECTOR: for (;;) {
  11     my $n = read $fh, $buf, 2048; last SECTOR if $n < 2048;
  12     my $head;
  13     if ($buf eq $ZERO) { $head = "---"; }
  14     else { $head = unpack "H*", substr $buf, 0, 16; }
  15     printf "%8d: %s\n", $i++, $head;
  16   }
  17 }