This file is indexed.

/usr/bin/dnssort is in ndisc6 1.0.1-1ubuntu2.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
#! /usr/bin/perl
#
# Perl script to sort DNS names
# 
# $Id: dnssort.in 483 2007-08-08 15:09:36Z remi $

# *************************************************************************
# *  Copyright © 2004-2006 Rémi Denis-Courmont.                           *
# *  This program is free software: you can redistribute and/or modify    *
# *  it under the terms of the GNU General Public License as published by *
# *  the Free Software Foundation, versions 2 or 3 of the license.        *
# *                                                                       *
# *  This program is distributed in the hope that it will be useful,      *
# *  but WITHOUT ANY WARRANTY; without even the implied warranty of       *
# *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
# *  GNU General Public License for more details.                         *
# *                                                                       *
# *  You should have received a copy of the GNU General Public License    *
# *  along with this program. If not, see <http://www.gnu.org/licenses/>. *
# *************************************************************************

use strict;
#use locale; -- not very useful for DNS
use Getopt::Std;

$Getopt::Std::STANDARD_HELP_VERSION = 1;
$main::VERSION = '1.0.1';

sub main::HELP_MESSAGE()
{
	print "Usage: dnssort [-r] [FILES]\n".
	      "       Sorts DNS hostnames from input.\n";
}


# Parse command line
our $opt_r;
getopts('r');

if ($#ARGV < 0)
{
	# No files specified -> Use standard input
	push @ARGV, '-';
}

# Read files
my @names = ();

foreach (@ARGV)
{
	open FD,"< $_" or die "$_: $!\n";
	while(<FD>)
	{
		chomp;
		split /\./;
		push @names, join('.', reverse @_);
	}
	close FD;
}

# Sort entries
@names = sort { lc($a) cmp lc($b) } @names;
if ($opt_r)
{
	@names = reverse @names;
}

# Print results
foreach (@names)
{
	split /\./;
	print join('.', reverse @_)."\n";
}