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

# cpanel - scripts/find_outdated_services          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::find_outdated_services;

=encoding utf-8

=head1 NAME

F<scripts/find_outdated_services>

=head1 USAGE

    find_outdated_services [ --always-restart | --never-restart | --auto ]

    find_outdated_services --help

=head1 DESCRIPTION

This command examines your system and identifies any services that are
“outdated”—i.e., that depend on libraries that are no longer present
on the system. This can often happen when such libraries receive updates,
e.g., from C<yum>.

Normal behavior is to ask you whether you’d like to restart the outdated
service(s); however, you can specify the C<--always-restart> or
C<--never-restart> flags
to bypass this prompt and either restart or not, respectively.

The C<--auto> flag is specified when this script is run automatically from
maintenance.  By default, it acts as C<--always-restart>; however, if
C</var/cpanel/disabled/auto-restart-services> exists, it acts as
C<--never-restart> instead.

=head1 EXCLUSION OF INDIVIDUAL SERVICES

You can make this script ignore a given service by including the service
name in F</etc/cpanel/local/ignore_outdated_services>. This file is
newline-delimited. Use a pound character (C<#>) at the start of a line
to indicate a comment. For example, to exclude the services C<cloud-init>
and C<cloud-final>, your file might look thus:

    # Prevent cPanel from checking about the cloud-init service
    cloud-init
    cloud-final

=cut

use strict;
use warnings;

use Try::Tiny;

use IO::Prompt ();

use Cpanel::Alarm                  ();
use Cpanel::ProcessCheck::Outdated ();
use Cpanel::Services::Restart      ();
use Cpanel::SysPkgs                ();

use parent qw( Cpanel::HelpfulScript );

use constant _OPTIONS => (
    'always-restart',
    'never-restart',
    'auto',
);

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

sub run {
    my ($self) = @_;

    my $alarm = Cpanel::Alarm->new( 90 * 3600 );    #90 minutes

    $self->say_maketext('Looking for outdated services …');

    my $err;
    my @services;
    try {

        #For CPANEL-39432: clean and rebuild package manager cache
        Cpanel::SysPkgs->new->clean;
        @services = grep( !m/^httpd\.service$|^cpinit\.service$/, _get_outdated_services() );    # yum hooks already restart apache when needed
    }
    catch {
        $err = $_;
        if ( $err =~ qr/PID \d+ does not belong to any loaded unit/ ) {

            # https://bugzilla.redhat.com/show_bug.cgi?id=2122587
            # TL;DR - systemd-libs got updated so now dbus can't find its hat.
            # As such just say that we need a reboot (phrases were taken
            # from securityadvisor, but since this is a CLI tool, the URL
            # anchor building bits were omitted).
            $self->say_maketext('The system’s core libraries or services have been updated.');
            $self->say_maketext('Reboot the server to ensure the system benefits from these updates.');
            return 0;
        }
        elsif ( !try { $err->isa('Cpanel::Exception::Unsupported') } ) {
            local $@ = $err;
            die;
        }
        print STDERR $err;
    };
    return 1 if $err;
    if (@services) {
        s<\.service\z><> for @services;

        $self->say(q<>);
        $self->say_maketext( 'The system found [quant,_1,outdated service,outdated services]:', 0 + @services );
        $self->say("\t$_") for @services;

        my $proceed_yn = $self->getopt('always-restart');
        $proceed_yn //= $self->getopt('never-restart') ? 0 : undef;
        $proceed_yn //= $self->getopt('auto') ? $self->auto_disabled ? 0 : 1 : undef;

        my $yes = $self->locale()->maketext('Yes');

        $proceed_yn //= IO::Prompt::prompt(
            '-one_char',
            '-yes_no',
            "\n" . $self->locale()->maketext( 'Would you like to restart [numerate,_1,this service,these services]?', 0 + @services ) . ' [y/n]: ',
        );

        if ($proceed_yn) {
            for my $svc (@services) {
                $self->say(q<>);
                $self->say_maketext( 'Restarting “[_1]” …', $svc );

                #Since we don’t report anything other than just
                #success or failure, and we want STDOUT and STDERR
                #to pass through, the system() built-in is fine.
                my $output = Cpanel::Services::Restart::restartservice($svc);

                my $msg;

                if ( $output =~ m/ has failed/ ) {
                    $msg = $self->locale()->maketext( 'The system failed to restart “[_1]”.', $svc );
                }
                else {
                    $msg = $self->locale()->maketext( 'The system has restarted “[_1]”.', $svc );
                }

                $self->say( $self->bold($msg) );
            }
        }
    }
    else {
        $self->say_maketext('The system did not find any outdated services.');
    }

    return 0;
}

sub auto_disabled {
    return -e '/var/cpanel/disabled/auto-restart-services';
}

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

#overridden in tests
BEGIN {
    *_get_outdated_services = *Cpanel::ProcessCheck::Outdated::outdated_services;
}

1;