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Edit File: setupmailserver

#!/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.

use strict;
use warnings;

use Cpanel::Config::LoadCpConf        ();
use Cpanel::Config::CpConfGuard       ();
use Cpanel::Chkservd::Manage          ();
use Cpanel::RPM::Versions::Directory  ();
use Cpanel::RPM::Versions::File       ();
use Cpanel::SSLCerts                  ();
use Cpanel::Usage                     ();
use Cpanel::PID                       ();
use Cpanel::Init                      ();
use Cpanel::MailUtils::SNI            ();
use Cpanel::AdvConfig::dovecot::utils ();
use Cpanel::SafeRun::Object           ();
use Cpanel::Dovecot::Service          ();
use Cpanel::Server::Type              ();
use Cpanel::ServerTasks               ();

our $DOVECOT_CONF_PATH = '/etc/dovecot/dovecot.conf';

my $help    = 0;
my $man     = 0;
my $force   = 0;
my $current = 0;
$| = 1;

delete $ENV{'cp_security_token'};
delete $ENV{'HTTP_REFERER'};

# Argument processing
my %opts = (
    'force'   => \$force,
    'current' => \$current,
);

Cpanel::Usage::wrap_options( \@ARGV, \&usage, \%opts );

@ARGV = ( grep( !/^--/, @ARGV ) );

my $selected_mailserver = shift;
usage() unless ( $selected_mailserver || $current );

my $cpconf_ref         = Cpanel::Config::LoadCpConf::loadcpconf();
my $current_mailserver = 'dovecot';

if ($current) {
    print "Current mailserver type: ${current_mailserver}\n";
    print "Current storage format: maildir or mdbox\n";
    exit 0;
}

if ( $> != 0 ) {
    die "You must perform the conversion process as the root user.";
}

if ( $selected_mailserver ne 'disabled' && $selected_mailserver ne 'dovecot' ) {
    print "You specified an unknown mailserver type.\nThe valid mailserver types are: “dovecot” and “disabled”.\nTry the $0 --help command.\n";
    exit 1;
}

if ( !$force && $selected_mailserver ne 'disabled' ) {
    my $dir          = Cpanel::RPM::Versions::Directory->new( { 'dont_set_legacy' => 1 } );
    my $target_state = $dir->fetch( { 'section' => 'target_settings', 'key' => 'exim' } );

if ( $target_state && $target_state =~ m/^(uninstalled|unmanaged)$/ ) {
        print "WARNING: You attempted to enable the dovecot mailserver, but exim is explicitly set to $target_state in the /var/cpanel/rpm.versions.d/ file.\n";

print "This means that cPanel & WHM does not manage the mailserver's packages."                           if ( $target_state eq 'unmanaged' );
        print "This means that cPanel & WHM has explicitly blocked the mailserver's packages from installation. " if ( $target_state eq 'uninstalled' );

print "If this was unintentional, run the following command to remove this flag, \nand then run the setupmailserver script.\n";
        print "\n    /usr/local/cpanel/scripts/update_local_rpm_versions --del target_settings.exim\n\n";

print "If this was intentional, run the setupmailserver script with the --force flag.\n\n";
        exit 2;
    }
}

if ( !-e '/etc/dovecot/ssl/dovecot.crt' ) {
    require Cpanel::SSLCerts;
    Cpanel::SSLCerts::createDefaultSSLFiles( 'service' => 'dovecot' );
}

$selected_mailserver = 'disabled' if Cpanel::Server::Type::is_dnsonly();

my $pid_obj = Cpanel::PID->new( { 'pid_file' => '/var/run/setupmailserver.pid' } );
unless ( $pid_obj->create_pid_file() > 0 ) {
    print "The setupmailserver script is running already.\n";
    print "Wait for this conversion process to finish before you attempt another.\n";
    exit 1;
}

my $installed = install_cpanel_rpms();

my $changed_enabled_protocols;
my $disabled_mailserver_text = '';
if ( $selected_mailserver eq 'disabled' ) {
    $changed_enabled_protocols = disable_imap_and_pop3();

# Dovecot must always be enabled
    # for local mail delivery
    $selected_mailserver      = 'dovecot';
    $disabled_mailserver_text = ' (local delivery only)';

}
else {
    $changed_enabled_protocols = enable_imap_and_pop3();
}

if ( !$cpconf_ref->{'mailserver'} || $cpconf_ref->{'mailserver'} ne $selected_mailserver ) {
    my $cpconf_guard = Cpanel::Config::CpConfGuard->new();
    $cpconf_ref->{'mailserver'} = $cpconf_guard->{'data'}->{'mailserver'} = $selected_mailserver;
    $cpconf_guard->save();
    print "\nThe system configured the new mailserver in the cpanel.config file as $selected_mailserver\n";
}

if ( !$force && !$installed ) {
    rebuildconf_if_not_valid();
    reconfigure_exim() if $selected_mailserver ne 'disabled';

if ($changed_enabled_protocols) {
        ensure_lmtp_is_monitored();
        local $@;
        eval { Cpanel::ServerTasks::queue_task( ['CpServicesTasks'], "restartsrv dovecot", "restartsrv tailwatchd" ); };
        warn if $@;
        exit(0);
    }
    print "The system is already configured for the ${selected_mailserver}${disabled_mailserver_text} mailserver.\n";
    exit 0;
}

my $error_count = 0;

#branch to uninsall/install functions
enable_dovecot();
rebuildconf_if_not_valid();
reconfigure_exim();
run_fastmail();
ensure_lmtp_is_monitored();
{
    local $@;
    eval { Cpanel::ServerTasks::queue_task( ['CpServicesTasks'], "restartsrv tailwatchd" ); };
    warn if $@;
}
$pid_obj->remove_pid_file();

if ($error_count) {
    print "\nWARNING: The system encountered errors during the conversion process.\n";
    exit 1;
}
else {
    print "\nMailserver conversion complete.\n";
    exit 0;
}

#----------------------------------------------------------------------

sub rebuildconf_if_not_valid {
    require Cpanel::AdvConfig::dovecot;
    if ( !( Cpanel::AdvConfig::dovecot::check_if_config_file_is_valid($DOVECOT_CONF_PATH) )[0] ) {
        Cpanel::SafeRun::Object->new_or_die( 'program' => '/usr/local/cpanel/scripts/builddovecotconf' );
    }
    return 1;
}

sub enable_imap_and_pop3 {
    print "\nEnabling IMAP and POP3.\n";
    return _setup_dovecot_services( 'protocols' => { 'pop3' => 1, 'imap' => 1 } );
}

sub _setup_dovecot_services {
    my (@args) = @_;
    my $ret = Cpanel::Dovecot::Service::set_dovecot_service_state(@args);
    Cpanel::Dovecot::Service::set_dovecot_monitoring_state(@args);
    return $ret;
}

sub disable_imap_and_pop3 {
    print "\nDisabling IMAP and POP3.\n";
    return _setup_dovecot_services( 'protocols' => { 'pop3' => 0, 'imap' => 0 } );
}

sub run_fastmail {
    system '/usr/local/cpanel/scripts/fastmail';
    return;
}

sub enable_dovecot {
    print "\nChecking that Dovecot is up-to-date...\n";
    install_cpanel_rpms($force);

if ($force) {
        print "\nChecking the status of Dovecot's installed packages...\n";
        system( '/usr/local/cpanel/scripts/check_cpanel_pkgs', '--fix', '--long-list', ( $ENV{'CPANEL_BASE_INSTALL'} ? '--no-broken' : () ), '--targets', 'exim' );    # dovecot is now a dependency of exim (see CPANEL-7391)
    }

print "\nChecking SSL certificates...";
    my $dovecot_cert_ref = Cpanel::SSLCerts::fetchSSLFiles( 'service' => 'dovecot' );
    unless ( $dovecot_cert_ref->{'crt'} ) {
        print "The certificate is missing or unusable. Generating a default certificate...";
        {
            no warnings 'once';
            open OLDSTDERR, '>&STDERR';
        }
        open STDERR, '>', '/dev/null';
        Cpanel::SSLCerts::createDefaultSSLFiles( 'service' => 'dovecot' );
        open STDERR, '>&OLDSTDERR';
        print "Done.\n";
    }
    else {
        print "Done.\n";
    }

print "\n" . txt_for_enabling_service('Dovecot') . "\n";
    my $init   = Cpanel::Init->new();
    my $output = $init->run_command_for_one( 'enable', 'dovecot' );

print "\nRebuilding SNI configuration...";
    if ( !eval { Cpanel::MailUtils::SNI->rebuild_dovecot_sni_conf() } ) {
        print " failed! Error: " . $@ . "\n";
    }
    print "Done.\nSuccessfully built Dovecot SNI configuration: " . Cpanel::AdvConfig::dovecot::utils::find_dovecot_sni_conf() . "\n";

print "\nEnqueueing restart of Dovecot...\n";
    local $@;
    eval { Cpanel::ServerTasks::queue_task( ['CpServicesTasks'], "restartsrv dovecot" ); };
    warn if $@;
    return;
}

sub txt_for_enabling_service {
    my $service = shift;

return qq{Enabling the $service service in the systemd system...};
}

sub install_cpanel_rpms {
    my $versions = Cpanel::RPM::Versions::File->new( { 'only_targets' => [qw/exim/] } );    # dovecot is now a dependency of exim (see CPANEL-7391)
    $versions->stage();
    return $versions->commit_changes();
}

sub ensure_lmtp_is_monitored {
    my %monitored_services = Cpanel::Chkservd::Manage::getmonitored();
    Cpanel::Chkservd::Manage::enable('lmtp') if !$monitored_services{'lmtp'};
    return;
}

sub reconfigure_exim {
    print "\nReconfiguring Exim for the new mailserver...\n";
    local $@;
    eval { Cpanel::ServerTasks::queue_task( ['EximTasks'], 'buildeximconf --restart' ); };
    warn if $@;
    return;
}

sub usage {
    print "Usage: setupmailserver [options] <mailserver>\n\n";
    print "Options:\n";
    print "  --force                    Perform conversion even if server is already configured\n";
    print "  --current                  Display the currently configured mail server\n";
    print "\n";
    print "MailServers:\n";
    print "  dovecot    Standard mail server on cPanel systems.\n";
    print "  disabled   Disable local POP3 and IMAP functionality (dovecot will function in authentication only mode)\n";
    print "\n";

exit 0;
}

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Edit File: setupmailserver

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