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#!/usr/local/cpanel/3rdparty/bin/perl

# cpanel - scripts/updatenameserverips             Copyright 2022 cPanel, L.L.C.
#                                                           All rights reserved.
# copyright@cpanel.net                                         http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited

# ignore our parent if it dies
$SIG{'HUP'} = 'IGNORE';
$SIG{'INT'} = 'IGNORE';

use strict;

use Getopt::Long ();

use Cpanel::DnsUtils::NameServerIPs ();
use Cpanel::Logger                  ();
use Cpanel::PID                     ();

my $logger = Cpanel::Logger->new();

if ( $> != 0 ) {
    $logger->die("This program can only be run as root");
}

my ( $debug, $help );
if (
    !Getopt::Long::GetOptions(
        "debug!" => \$debug,
        "help!"  => \$help
    )
) {
    print_usage();
    $logger->die("Invalid command line options");
}

if ($help) {
    print_usage();
    exit();
}

my $pid_obj = Cpanel::PID->new( { 'pid_file' => '/var/run/updatenameserverips.pid' } );
unless ( $pid_obj->create_pid_file() > 0 ) {
    print "Updatenameserverips appears to be running already.\n";
    print "Please wait for the current update to finish before attempting another.\n";
    exit 1;
}

eval { Cpanel::DnsUtils::NameServerIPs::updatenameserveriplist($debug); };

if ($@) {
    $logger->warn("An error occurred in building name server ip list: $@");
}

$pid_obj->remove_pid_file();
exit();

sub print_usage {
    print <<"USAGE";

$0 [ options ]

    Generates a list of name servers and their ip addresses.

    Options:

        --debug     print extra debugging information
        --help      print this message

USAGE
}