| Current File : //usr/bin/ntpsweep |
#! /usr/bin/perl -w
#
# $Id$
#
# DISCLAIMER
#
# Copyright (C) 1999,2000 Hans Lambermont and Origin B.V.
#
# Permission to use, copy, modify and distribute this software and its
# documentation for any purpose and without fee is hereby granted,
# provided that the above copyright notice appears in all copies and
# that both the copyright notice and this permission notice appear in
# supporting documentation. This software is supported as is and without
# any express or implied warranties, including, without limitation, the
# implied warranties of merchantability and fitness for a particular
# purpose. The name Origin B.V. must not be used to endorse or promote
# products derived from this software without prior written permission.
#
# Hans Lambermont <ntpsweep@lambermont.dyndns.org>
package ntpsweep;
use 5.006_000;
use strict;
use lib "/usr/share/ntp/lib";
use NTP::Util qw(do_dns ntp_read_vars ntp_peers ntp_sntp_line);
(my $program = $0) =~ s%.*/(.+?)(.pl)?$%$1%;
my ($showpeers, $maxlevel, $strip);
my (%known_host_info, %known_host_peers);
exit run(@ARGV) unless caller;
sub run {
my $opts;
if (!processOptions(\@_, $opts) ||
(((@_ != 1) && !$opts->{host} && !@{$opts->{'host-list'}}))) {
usage(1);
};
# no STDOUT buffering
$| = 1;
($showpeers, $maxlevel, $strip) =
($opts->{peers}, $opts->{maxlevel}, $opts->{strip});
my $hostsfile = shift;
# Main program
my @hosts;
if ($opts->{host}) {
push @hosts, $opts->{host};
}
else {
@hosts = read_hosts($hostsfile) if $hostsfile;
push @hosts, @{$opts->{'host-list'}};
}
# Print header
print <<EOF;
Host st offset(s) version system processor
--------------------------------+--+---------+-----------+------------+---------
EOF
%known_host_info = ();
%known_host_peers = ();
scan_hosts(@hosts);
return 0;
}
sub scan_hosts {
my (@hosts) = @_;
my $host;
for $host (@hosts) {
scan_host($host, 0, $host => 1);
}
}
sub read_hosts {
my ($hostsfile) = @_;
my @hosts;
open my $hosts, $hostsfile
or die "$program: FATAL: unable to read $hostsfile: $!\n";
while (<$hosts>) {
next if /^\s*(#|$)/; # comment/empty
chomp;
push @hosts, $_;
}
close $hosts;
return @hosts;
}
sub scan_host {
my ($host, $level, %trace) = @_;
my $stratum = 0;
my $offset = 0;
my $daemonversion = "";
my $system = "";
my $processor = "";
my @peers;
my $known_host = 0;
if (exists $known_host_info{$host}) {
$known_host = 1;
}
else {
($offset, $stratum) = ntp_sntp_line($host);
# got answers ? If so, go on.
if ($stratum) {
my $vars = ntp_read_vars(0, [qw(processor system daemon_version)], $host) || {};
$daemonversion = $vars->{daemon_version};
$system = $vars->{system};
$processor = $vars->{processor};
# Shorten daemon_version string.
$daemonversion =~ s/(;|Mon|Tue|Wed|Thu|Fri|Sat|Sun).*$//;
$daemonversion =~ s/version=//;
$daemonversion =~ s/(x|)ntpd //;
$daemonversion =~ s/(\(|\))//g;
$daemonversion =~ s/beta/b/;
$daemonversion =~ s/multicast/mc/;
# Shorten system string
$system =~ s/UNIX\///;
$system =~ s/RELEASE/r/;
$system =~ s/CURRENT/c/;
# Shorten processor string
$processor =~ s/unknown//;
}
# got answers ? If so, go on.
if ($daemonversion) {
if ($showpeers) {
my $peers_ref = ntp_peers($host);
my @peers_tmp = @$peers_ref;
for (@peers_tmp) {
$_->{remote} =~ s/^(?: |x|\.|-|\+|#|\*|o)([^ ]+)/$1/;
push @peers, $_->{remote};
}
}
}
# Add scanned host to known_hosts array
#push @known_hosts, $host;
if ($stratum) {
$known_host_info{$host} = sprintf "%2d %9.3f %-11s %-12s %s",
$stratum, $offset, (substr $daemonversion, 0, 11),
(substr $system, 0, 12), (substr $processor, 0, 9);
}
else {
# Stratum level 0 is consider invalid
$known_host_info{$host} = " ?";
}
$known_host_peers{$host} = [@peers];
}
if ($stratum || $known_host) { # Valid or known host
my $printhost = ' ' x $level . (do_dns($host) || $host);
# Shorten host string
if ($strip) {
$printhost =~ s/$strip//;
}
# append number of peers in brackets if requested and valid
if ($showpeers && ($known_host_info{$host} ne " ?")) {
$printhost .= " (" . @{$known_host_peers{$host}} . ")";
}
# Finally print complete host line
printf "%-32s %s\n",
(substr $printhost, 0, 32), $known_host_info{$host};
if ($showpeers && ($maxlevel ? $level < $maxlevel : 1)) {
$trace{$host} = 1;
# Loop through peers
foreach my $peer (@{$known_host_peers{$host}}) {
if (exists $trace{$peer}) {
# we've detected a loop !
$printhost = ' ' x ($level + 1) . "= " . $peer;
# Shorten host string
$printhost =~ s/$strip// if $strip;
printf "%-32s\n", substr $printhost, 0, 32;
} else {
if ((substr $peer, 0, 3) ne "127") {
scan_host($peer, $level + 1, %trace);
}
}
}
}
}
else { # We did not get answers from this host
my $printhost = ' ' x $level . (do_dns($host) || $host);
$printhost =~ s/$strip// if $strip;
printf "%-32s ?\n", substr $printhost, 0, 32;
}
}
# EDIT THIS FILE WITH CAUTION (ntpsweep-opts)
#
# It has been AutoGen-ed June 23, 2020 at 02:21:34 AM by AutoGen 5.18.5
# From the definitions ntpsweep-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 = {
'host-list' => [],
'peers' => '',
'maxlevel' => '',
'strip' => '',
'host' => '',
'help' => '', 'more-help' => ''
};
my $argument = '[hostfile]';
my $ret = GetOptionsFromArray($args, $opts, (
'host-list|l=s', 'peers|p', 'maxlevel|m=i',
'strip|s=s', 'host|h=s',
'help|?', 'more-help'));
$usage = <<'USAGE';
ntpsweep - Print various informations about given ntp servers - Ver. 4.2.8p15
USAGE: ntpsweep [ -<flag> [<val>] | --<name>[{=| }<val>] ]... [hostfile]
-l, --host-list=str Host to execute actions on
- may appear multiple times
-p, --peers Recursively list all peers a host synchronizes to
-m, --maxlevel=num Traverse peers up to this level (4 is a reasonable number)
-s, --strip=str Strip this string from hostnames
-?, --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__