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Current File : //bin/hexdump.pl

#!/usr/bin/perl -w

use strict;
use Data::HexDump;
use FileHandle;

my $prgname = "hexdump";
my $file = shift;
my $fh;

if ($file) {
  die "$prgname: $file: Is a directory\n" if -d $file;
  $fh = new FileHandle $file;
  die "$prgname: $file: $!\n" unless defined $fh;

  my $f = new Data::HexDump;
  $f->fh($fh);
  $f->block_size(1024);
  print while $_ = $f->dump;

  close $fh;
}
else {
  # read STDIN
}

sub Usage {
  die "Usage: $prgname [FILE]\n" .
    "Dump FILE, or standard input, to standard output.\n\n" .
    "With no FILE, or when FILE is -, read standard input.\n";
}