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#!/usr/local/cpanel/3rdparty/bin/perl # cpanel - scripts/ensure_hostname_resolves 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 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(); if ( $self->hostname_resolves() ) { print "[+] Successfully updated hostname to auto-resolving hostname: $new_hostname\n"; } else { print "[!] Failed to update hostname to an auto-resolving hostname.\n"; return 1; } } return 0; } sub hostname_resolves ($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;