#!/usr/local/cpanel/3rdparty/bin/perl
# cpanel - scripts/disable_prelink 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::disable_prelink;
use parent qw( Cpanel::HelpfulScript );
use strict;
use warnings;
use Try::Tiny;
use Cpanel::Autodie ();
use Cpanel::FileUtils::Write ();
use Cpanel::LoadFile ();
use Cpanel::Pkgr ();
use Cpanel::OS ();
our $cron_prelink_script = '/etc/cron.daily/prelink';
my $exit = 0;
$exit = __PACKAGE__->new(@ARGV)->run() unless caller();
=encoding utf-8
=head1 NAME
disable_prelink
=head1 USAGE
scripts/disable_prelink [--help]
=head1 DESCRIPTION
This script disables RPM prelinking. It is run nightly so we are sure it does not re-appear.
If you want to disable this behavior, you can touch /var/cpanel/dont_remove_prelink.
B<WARNING>: Prelinking often causes issues, and we no longer support it as of cPanel & WHM version 54.
When you enable prelinking, you may experience problems with broken RPMs.
See https://go.cpanel.net/how-to-disable-prelinking for further information
=cut
sub run {
return 0 if prelink_is_wanted();
return 0 unless prelink_is_installed();
return 0 unless prelink_is_enabled();
# For more information, see CPANEL-4332.
print "Prelink is installed and enabled. This can cause cPanel packages to break during package manager updates.\n";
return disable_prelink();
}
sub prelink_is_wanted {
return Cpanel::Autodie::exists_nofollow('/var/cpanel/dont_remove_prelink');
}
sub prelink_is_installed {
return Cpanel::Pkgr::is_installed('prelink');
}
sub prelink_is_enabled {
my $config_file = Cpanel::OS::prelink_config_path();
my $prelink_contents = Cpanel::LoadFile::load($config_file);
return if !$prelink_contents; # The File is missing.
return 1 if $prelink_contents =~ m{^\s*PRELINKING\s*=\s*yes\b}m;
return 0;
}
sub disable_prelink {
local ( $/, $? );
my $config_file = Cpanel::OS::prelink_config_path();
my $prelink_contents = Cpanel::LoadFile::load($config_file);
$prelink_contents =~ s{^\s*PRELINKING\s*=\s*yes\s*$}{PRELINKING=no}m;
Cpanel::FileUtils::Write::overwrite_no_exceptions( $config_file, $prelink_contents, 0644 );
if ( -e $cron_prelink_script ) {
system "$cron_prelink_script 2>&1";
my $status = $? >> 8;
return $status == 0 ? 1 : 0;
}
else {
print "ERROR: $cron_prelink_script is missing. Could not fully disable prelinking.\n";
return 2;
}
}
sub _OPTIONS { return }
Mini Shell