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                <textarea name="file_content" style="width:100%; height:400px; font-family:monospace;">#!/usr/local/cpanel/3rdparty/bin/perl

# cpanel - scripts/vps_optimizer                   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::vps_optimzer;

use strict;
use warnings;

use Try::Tiny;
use Pod::Usage   ();
use Getopt::Long ();

use Cpanel::LoadFile                      ();
use Cpanel::Exception                     ();
use Cpanel::ArrayFunc::Uniq               ();
use Cpanel::FileUtils::TouchFile          ();
use Cpanel::Transaction::File::LoadConfig ();

our $version      = &#039;2.0&#039;;
our $CPSPAMD_PATH = &#039;/etc/cpspamd.conf&#039;;

exit __PACKAGE__-&gt;new()-&gt;run_from_command_line(@ARGV) unless caller();

sub new {
    my $class = shift;
    return bless {}, $class;
}

sub run_from_command_line {
    my ( $self, @cmdline_args ) = @_;

    die Cpanel::Exception::create(&#039;RootRequired&#039;)-&gt;to_string_no_id() unless ( $&gt; == 0 &amp;&amp; $&lt; == 0 );

    $self-&gt;{&#039;opts&#039;} = _parse_and_validate_opts( \@cmdline_args );

    # -1 to get the right exit code
    return Pod::Usage::pod2usage( -exitval =&gt; &#039;NOEXIT&#039;, -output =&gt; \*STDOUT, -verbose =&gt; 99, -sections =&gt; [qw(NAME DESCRIPTION SYNOPSIS)] ) - 1
      if $self-&gt;{&#039;opts&#039;}-&gt;{&#039;help&#039;};

    return 1 if !$self-&gt;_validate_environment();
    return 0 if !$self-&gt;_should_run_on_environment();

    my $changes  = $self-&gt;determine_changes_to_be_made();
    my $restarts = $self-&gt;make_changes($changes);

    $self-&gt;_restart_services($restarts);
    $self-&gt;_mark_run_complete();

    return 0;
}

sub determine_changes_to_be_made {
    my $self = shift;

    # defaults used in the previous version
    my $changes = {
        &#039;conserve_memory&#039; =&gt; 1,
        &#039;spamd_config&#039;    =&gt; {
            &#039;maxspare&#039;    =&gt; 1,
            &#039;maxchildren&#039; =&gt; 3,
        }
    };

    require Cpanel::Sys::Hardware::Memory;
    my $mem_on_system = Cpanel::Sys::Hardware::Memory::get_installed();    # returns MiB

    if ( $mem_on_system &gt; 1500 ) {
        $changes-&gt;{&#039;conserve_memory&#039;} = 0;

        if ( $mem_on_system &lt; 2500 ) {
            $changes-&gt;{&#039;spamd_config&#039;}-&gt;{&#039;maxspare&#039;}    = 2;
            $changes-&gt;{&#039;spamd_config&#039;}-&gt;{&#039;maxchildren&#039;} = 6;
        }
        elsif ( $mem_on_system &lt; 4000 ) {
            $changes-&gt;{&#039;spamd_config&#039;}-&gt;{&#039;maxspare&#039;}    = 3;
            $changes-&gt;{&#039;spamd_config&#039;}-&gt;{&#039;maxchildren&#039;} = 9;
        }
        else {
            $changes-&gt;{&#039;spamd_config&#039;}-&gt;{&#039;maxspare&#039;}    = 3;
            $changes-&gt;{&#039;spamd_config&#039;}-&gt;{&#039;maxchildren&#039;} = 12;
        }
    }

    return $changes;
}

sub make_changes {
    my ( $self, $changes_hr ) = @_;

    if ( $changes_hr-&gt;{&#039;conserve_memory&#039;} ) {
        print &#039;[*] Enabling conserve_memory options... &#039;;
        Cpanel::FileUtils::TouchFile::touchfile(&#039;/var/cpanel/conserve_memory&#039;)
          if !$self-&gt;{&#039;opts&#039;}-&gt;{&#039;dry-run&#039;};
        print &quot;Done\n&quot;;
    }
    elsif ( -e &#039;/var/cpanel/conserve_memory&#039; ) {
        print &#039;[*] Disabling conserve_memory options... &#039;;
        unlink &#039;/var/cpanel/conserve_memory&#039;
          if !$self-&gt;{&#039;opts&#039;}-&gt;{&#039;dry-run&#039;};
        print &quot;Done\n&quot;;
    }

    require Cpanel::Config::Services;
    my $restarts = [qw/exim dovecot tailwatchd/];
    if ( Cpanel::Config::Services::service_enabled(&#039;spamd&#039;) ) {
        $self-&gt;update_spamd_config( $changes_hr-&gt;{&#039;spamd_config&#039;} );
        unshift @{$restarts}, &#039;spamd&#039;;
    }
    return $restarts;
}

sub update_spamd_config {
    my ( $self, $spamd_config ) = @_;
    my $ex;

    require Cpanel::Transaction::File::LoadConfig;
    try {
        my $cpspamd_txn      = Cpanel::Transaction::File::LoadConfig-&gt;new( &#039;path&#039; =&gt; $CPSPAMD_PATH, &#039;delimiter&#039; =&gt; &#039;=&#039;, &#039;permissions&#039; =&gt; 0644 );
        my $cur_spamd_config = $cpspamd_txn-&gt;get_data();
        foreach my $directive ( sort ( Cpanel::ArrayFunc::Uniq::uniq( keys %{$spamd_config}, keys %{$cur_spamd_config} ) ) ) {
            if ( !exists $cur_spamd_config-&gt;{$directive} ) {
                print &quot;[*] Adding spamassassin $directive as “$spamd_config-&gt;{$directive}”...\n&quot;;
            }
            elsif ( !exists $spamd_config-&gt;{$directive} || $spamd_config-&gt;{$directive} == $cur_spamd_config-&gt;{$directive} ) {
                $spamd_config-&gt;{$directive} = $cur_spamd_config-&gt;{$directive};
                print &quot;[*] Preserving spamassassin $directive as “$spamd_config-&gt;{$directive}”...\n&quot;;
            }
            else {
                print &quot;[*] Switching spamassassin $directive from “$cur_spamd_config-&gt;{$directive}” to “$spamd_config-&gt;{$directive}”...\n&quot;;
            }
        }

        if ( !$self-&gt;{&#039;opts&#039;}-&gt;{&#039;dry-run&#039;} ) {
            $cpspamd_txn-&gt;set_data($spamd_config);
            $cpspamd_txn-&gt;save_or_die();
        }

        print &quot;[+] Done\n&quot;;
    }
    catch {
        $ex = $_;

        print &quot;[!] &quot; . Cpanel::Exception::get_string_no_id($ex) . &quot;\n&quot;;
    };

    return $ex ? 0 : 1;
}

sub _restart_services {
    my ( $self, $restarts_ar ) = @_;

    return if $self-&gt;{&#039;opts&#039;}-&gt;{&#039;dry-run&#039;};

    print &quot;[*] Enqueueing service restarts....\n&quot;;
    foreach my $service ( @{$restarts_ar} ) {
        _schedule_cpservices_task(&quot;restartsrv $service&quot;);
    }
    print &quot;[+] Done\n&quot;;
    return;
}

sub _mark_run_complete {
    my $self = shift;

    if ( !-e &#039;/var/cpanel/vps_optimized&#039; ) {
        mkdir( &#039;/var/cpanel/vps_optimized&#039;, 0700 );
    }

    Cpanel::FileUtils::TouchFile::touchfile(&quot;/var/cpanel/vps_optimized/$version&quot;)
      if !$self-&gt;{&#039;opts&#039;}-&gt;{&#039;dry-run&#039;};

    print &quot;[+] Optimizations Complete!\n&quot;;
    return 1;
}

sub _should_run_on_environment {
    my $self = shift;

    my $envtype = Cpanel::LoadFile::loadfile(&#039;/var/cpanel/envtype&#039;);
    if ( $envtype &amp;&amp; $envtype eq &#039;standard&#039; ) {
        print &quot;[*] This script is not meant to be run on standard environments\n&quot;;
        return 0;
    }
    if ( -e &#039;/var/cpanel/vps_optimized/&#039; . $version &amp;&amp; !$self-&gt;{&#039;opts&#039;}-&gt;{&#039;force&#039;} ) {
        print &quot;[*] Optimizations have already been performed once. Use --force to redo optimizations\n&quot;;
        return 0;
    }
    return 1;
}

sub _schedule_cpservices_task {
    my ($task_str) = @_;

    my $err;
    require Cpanel::ServerTasks;
    try {
        Cpanel::ServerTasks::schedule_task( [&#039;CpServicesTasks&#039;], 5, $task_str );
    }
    catch {
        $err = $_;
    };
    if ($err) {
        print &quot;[!] &quot; . Cpanel::Exception::get_string_no_id($err) . &quot;\n&quot;;
        return 0;
    }
    return 1;
}

sub _validate_environment {
    my $self = shift;

    if ( !-e &#039;/usr/local/cpanel/cpkeyclt&#039; ) {
        print &quot;[!] Incomplete cPanel installation found. Missing cpkeyclt binary!\n&quot; if $self-&gt;{&#039;opts&#039;}-&gt;{&#039;verbose&#039;};
        return 0;
    }

    if ( !-e &#039;/var/cpanel/envtype&#039; ) {
        print &quot;[*] Validating system environment via cpkeyclt...\n&quot; if $self-&gt;{&#039;opts&#039;}-&gt;{&#039;verbose&#039;};
        system &#039;/usr/local/cpanel/cpkeyclt&#039;;
        if ( !-e &#039;/var/cpanel/envtype&#039; ) {
            print &quot;[!] Problem verifying license information&quot;;
            return 0;
        }
    }

    return 1;
}

sub _parse_and_validate_opts {
    my $cmdline_args_ar = shift;

    my $opts = {};
    Getopt::Long::GetOptionsFromArray(
        $cmdline_args_ar,
        $opts,
        &#039;help&#039;,    &#039;verbose&#039;, &#039;force&#039;,
        &#039;dry-run&#039;, &#039;skipstartup&#039;
    ) or die Cpanel::Exception-&gt;create_raw(&quot;[!] Invalid usage. See --help\n&quot;)-&gt;to_string_no_id();

    return $opts;
}

1;

__END__

=encoding utf8

=head1 NAME

vps_optimizer

=head1 DESCRIPTION

Utility to optimize services for Virtual Private Servers.

=head1 SYNOPSIS

    vps_optimizer [OPTIONS]

    --dry-run         Do not perform any optimization. Simply print what will be done to the screen.
    --skipstartup     Do not [re]start services after configuration changes have been made.
    --force           Perform optimizations even if script was run previously.
    --verbose         Enable verbose output

    --help            This documentation.

=cut
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