/usr/bin/ntptrace is in ntp 1:4.2.8p10+dfsg-3+deb9u2.
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 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 | #! /usr/bin/perl -w
# John Hay -- John.Hay@icomtek.csir.co.za / jhay@FreeBSD.org
package ntptrace;
use 5.006_000;
use strict;
use lib "/usr/share/ntp/lib";
use NTP::Util qw(ntp_read_vars do_dns);
exit run(@ARGV) unless caller;
sub run {
my $opts;
if (!processOptions(\@_, $opts)) {
usage(1);
};
my $dodns = $opts->{numeric} ? 0 : 1;
my $max_hosts = $opts->{'max-hosts'};
my $host = shift || $opts->{host};
my $nb_host = 0;
for (;;) {
$nb_host++;
my %info = get_info($host);
last if not %info;
my $dhost = $host;
if ($dodns) {
my $name = do_dns($host);
$dhost = $name if defined $name;
}
printf "%s: stratum %d, offset %f, synch distance %f",
$dhost, $info{stratum}, $info{offset}, $info{syncdistance};
printf ", refid '%s'", $info{refid} if $info{stratum} == 1;
print "\n";
last if $info{stratum} == 0 || $info{stratum} == 1 ||
$info{stratum} == 16;
last if $info{refid} =~ /^127\.127\.\d{1,3}\.\d{1,3}$/;
last if $nb_host == $max_hosts;
my $next_host = get_next_host($info{peer}, $host);
last if $next_host eq '';
last if $next_host =~ /^127\.127\.\d{1,3}\.\d{1,3}$/;
$host = $next_host;
}
return 0;
}
sub get_info {
my ($host) = @_;
my ($rootdelay, $rootdisp, $info) = (0, 0);
$info = ntp_read_vars(0, [], $host);
return if not defined $info;
return if not exists $info->{stratum};
$info->{offset} /= 1000;
$info->{syncdistance} = ($info->{rootdisp} + ($info->{rootdelay} / 2)) / 1000;
return %$info;
}
sub get_next_host {
my ($peer, $host) = @_;
my $info = ntp_read_vars($peer, [qw(srcadr)], $host);
return if not defined $info;
return $info->{srcadr};
}
# EDIT THIS FILE WITH CAUTION (ntptrace-opts)
#
# It has been AutoGen-ed March 21, 2017 at 10:40:18 AM by AutoGen 5.18.5
# From the definitions ntptrace-opts.def
# and the template file perlopt
use Getopt::Long qw(GetOptionsFromArray);
Getopt::Long::Configure(qw(no_auto_abbrev no_ignore_case_always));
my $usage;
sub usage {
my ($ret) = @_;
print STDERR $usage;
exit $ret;
}
sub paged_usage {
my ($ret) = @_;
my $pager = $ENV{PAGER} || '(less || more)';
open STDOUT, "| $pager" or die "Can't fork a pager: $!";
print $usage;
exit $ret;
}
sub processOptions {
my $args = shift;
my $opts = {
'numeric' => '',
'max-hosts' => '99',
'host' => '127.0.0.1',
'help' => '', 'more-help' => ''
};
my $argument = '[host]';
my $ret = GetOptionsFromArray($args, $opts, (
'numeric|n', 'max-hosts|m=i', 'host|r=s',
'help|?', 'more-help'));
$usage = <<'USAGE';
ntptrace - Trace peers of an NTP server - Ver. 4.2.8p10
USAGE: ntptrace [ -<flag> [<val>] | --<name>[{=| }<val>] ]... [host]
-n, --numeric Print IP addresses instead of hostnames
-m, --max-hosts=num Maximum number of peers to trace
-r, --host=str Single remote host
-?, --help Display usage information and exit
--more-help Pass the extended usage text through a pager
Options are specified by doubled hyphens and their name or by a single
hyphen and the flag character.
USAGE
usage(0) if $opts->{'help'};
paged_usage(0) if $opts->{'more-help'};
$_[0] = $opts;
return $ret;
}
END { close STDOUT };
1;
__END__
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