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

# cpanel - scripts/ensure_dovecot_memory_limits_meet_minimum
#                                                  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_dovecot_memory_limits_meet_minimum;

use strict;
use warnings;

use Cpanel::CachedDataStore               ();
use Cpanel::Services::Restart             ();
use Cpanel::AdvConfig::dovecot::Constants ();

our $MIN_SANE_LOGIN_PROCESS_SIZE  = Cpanel::AdvConfig::dovecot::Constants::MINIMUM_LOGIN_PROCESS_SIZE();
our $MIN_SANE_MAIL_PROCESS_SIZE   = Cpanel::AdvConfig::dovecot::Constants::MINIMUM_MAIL_PROCESS_SIZE();
our $RECOMMENDED_CONFIG_VSZ_LIMIT = Cpanel::AdvConfig::dovecot::Constants::RECOMMENDED_CONFIG_VSZ_LIMIT();
our $DEFAULT_PLUGIN_ACL           = Cpanel::AdvConfig::dovecot::Constants::DEFAULT_PLUGIN_ACL();
our $DEFAULT_AUTH_CACHE_SIZE      = Cpanel::AdvConfig::dovecot::Constants::DEFAULT_AUTH_CACHE_SIZE();

our $conf_file = '/var/cpanel/conf/dovecot/main';
exit( __PACKAGE__->script() ) unless caller();

sub script {
    my $dovecot_conf_obj = Cpanel::CachedDataStore::loaddatastore( $conf_file, 1 );    # lock and load
    my $modified         = 0;
    if ( 'HASH' ne ref $dovecot_conf_obj->{'data'} ) {
        $dovecot_conf_obj->{'data'} = {};
    }
    if ( $dovecot_conf_obj->{'data'}{'auth_cache_size'} && $dovecot_conf_obj->{'data'}{'auth_cache_size'} !~ tr{M}{} && $dovecot_conf_obj->{'data'}{'auth_cache_size'} < ( 1024**2 ) ) {
        $dovecot_conf_obj->{'data'}{'auth_cache_size'} = $DEFAULT_AUTH_CACHE_SIZE;
        $modified = 1;
    }
    if ( $dovecot_conf_obj->{'data'}{'login_process_size'} && $dovecot_conf_obj->{'data'}{'login_process_size'} < $MIN_SANE_LOGIN_PROCESS_SIZE ) {
        $dovecot_conf_obj->{'data'}{'login_process_size'} = $MIN_SANE_LOGIN_PROCESS_SIZE;
        $modified = 1;
    }
    if ( $dovecot_conf_obj->{'data'}{'mail_process_size'} && $dovecot_conf_obj->{'data'}{'mail_process_size'} < $MIN_SANE_MAIL_PROCESS_SIZE ) {
        $dovecot_conf_obj->{'data'}{'mail_process_size'} = $MIN_SANE_MAIL_PROCESS_SIZE;
        $modified = 1;
    }
    if ( $dovecot_conf_obj->{'data'}{'config_vsz_limit'} && $dovecot_conf_obj->{'data'}{'config_vsz_limit'} < $RECOMMENDED_CONFIG_VSZ_LIMIT ) {
        $dovecot_conf_obj->{'data'}{'config_vsz_limit'} = $RECOMMENDED_CONFIG_VSZ_LIMIT;
        $modified = 1;
    }
    if ( $dovecot_conf_obj->{'data'}{'plugin'}{'acl'} && $dovecot_conf_obj->{'data'}{'plugin'}{'acl'} !~ m{cache} ) {
        $dovecot_conf_obj->{'data'}{'plugin'}{'acl'} = $DEFAULT_PLUGIN_ACL;
        $modified = 1;
    }

    if ($modified) {
        $dovecot_conf_obj->save();

        # Either way we need to get the new settings in
        rebuild_dovecot_conf();
        Cpanel::Services::Restart::restartservice( 'dovecot', 1 );
    }
    else {
        $dovecot_conf_obj->abort();
    }
    return 0;
}

sub rebuild_dovecot_conf {

    return system('/usr/local/cpanel/scripts/builddovecotconf');
}