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

# cpanel - scripts/unsuspendacct                   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::unsuspendacct;

use strict;
use warnings;

use Try::Tiny;

use Cpanel::Passwd::Shell                      ();
use Cpanel::Auth::Shadow                       ();
use Cpanel::SafeFile                           ();
use AcctLock                                   ();
use Cpanel::PwCache                            ();
use Cpanel::ConfigFiles                        ();
use Cpanel::Validate::Domain::Tiny             ();
use Cpanel::Exception                          ();
use Cpanel::Dovecot::Action                    ();
use Cpanel::FileUtils::Match                   ();
use Cpanel::Hooks                              ();
use Cpanel::Hostname                           ();
use Cpanel::OS                                 ();
use Cpanel::PwCache::Clear                     ();
use Cpanel::AccessIds::ReducedPrivileges       ();
use Cpanel::AcctUtils::AccountingLog           ();
use Cpanel::AcctUtils::Domain                  ();
use Cpanel::AcctUtils::Owner                   ();
use Cpanel::AcctUtils::DomainOwner::Tiny       ();
use Cpanel::SafetyBits                         ();
use Cpanel::Config::LoadCpConf                 ();
use Cpanel::Config::LoadCpUserFile             ();
use Cpanel::Config::LoadWwwAcctConf            ();
use Cpanel::Config::CpUserGuard                ();
use Cpanel::ConfigFiles                        ();
use Cpanel::IP::Remote                         ();
use Cpanel::Quota::Temp                        ();
use Cpanel::ServerTasks                        ();
use Cpanel::Services::Enabled                  ();
use Cpanel::Logger                             ();
use Cpanel::Auth::Digest::DB::Manage           ();
use Cpanel::Mailman::ListManager               ();
use Cpanel::MysqlUtils::Suspension             ();
use Whostmgr::Accounts::SuspensionData::Writer ();
use Whostmgr::Accounts::Email                  ();
use Whostmgr::Accounts::Unsuspend              ();
use Whostmgr::Accounts::Unsuspend::Htaccess    ();
use Cpanel::Validate::Domain::Normalize        ();
use Cpanel::Notify                             ();
use Cpanel::Sys::Setsid::Fast                  ();
use Getopt::Long                               ();
use Cpanel::Team::Constants                    ();
use Cpanel::Team::Config                       ();

use Cpanel::Locale 'lh';

exit( run(@ARGV) ) unless caller;

my $logger;

sub run {    ## no critic qw(Subroutines::ProhibitExcessComplexity)
    my @argv = @_;

my $retain_service_proxies = 0;
    my $usage                  = 0;
    my $child_ok               = 0;

Getopt::Long::GetOptionsFromArray(
        \@argv,
        'retain-service-proxies' => \$retain_service_proxies,
        'help|usage'             => \$usage,
        'child-ok'               => \$child_ok,
    );

my $user = $argv[0];

$logger = Cpanel::Logger->new();

local $ENV{'REMOTE_USER'} = $ENV{'REMOTE_USER'};
    local $ENV{'USER'}        = $ENV{'USER'};

if ( ( !$ENV{'USER'} || !$ENV{'REMOTE_USER'} ) && $> == 0 ) {
        $ENV{'REMOTE_USER'} = 'root';    ## no critic qw(Variables::RequireLocalizedPunctuationVars) - local above
        $ENV{'USER'}        = 'root';    ## no critic qw(Variables::RequireLocalizedPunctuationVars) - local above
    }

if ($user) {
        $user =~ s/\///g;
    }

return usage(0) if $usage;
    return usage(1) if ( !$user || $user eq 'root' );

my $pass = ( Cpanel::PwCache::getpwnam($user) )[1];
    if ( !$pass ) {
        print "“$user” is not a user on this system. Maybe it’s a domain?\n";

my $old_user = $user;
        $user = Cpanel::AcctUtils::DomainOwner::Tiny::getdomainowner( $user, { default => undef } );

if ($user) {
            print "“$user” is the user who owns that domain. Verifying user …\n";

$pass = ( Cpanel::PwCache::getpwnam($user) )[1] or do {
                die "Invalid user ($user)\n";
            };
        }
        else {
            die "“$old_user” isn’t a domain, either. Exiting …\n";
        }

if ( $old_user ne $user ) {
            print "Domain lookup of domain '$old_user' yielded user '$user'\n";
        }
    }

unless ( $pass =~ m/^\!/ || $pass =~ m/^\*/ ) {
        print lh->maketext( 'An error occurred while attempting to unsuspend “[_1]”. The user “[_1]” is not in a suspended state.', $user ) . "\n";
        if ( -e "/var/cpanel/bwlimited/$user" ) {
            print "\nThe user is currently bandwidth limited. You may remove this limitation by increasing their bandwidth limit.\n";
        }
        return 1;
    }

if ( !$child_ok ) {
        my $cpuser_obj = Cpanel::Config::LoadCpUserFile::load_or_die($user);
        if ( $cpuser_obj->child_workloads() ) {
            print "To unsuspend “$user”, do so on the account’s parent node.\n";
            return 1;
        }
    }

if ( !do_hook( $user, 'pre' ) ) {
        print "Pre-unsuspend hook script returned failure.\n";
        return 1;
    }
    system '/usr/local/cpanel/scripts/preunsuspendacct', @argv if -x '/usr/local/cpanel/scripts/preunsuspendacct';

# Load account creation defaults
    my $cref = Cpanel::Config::LoadWwwAcctConf::loadwwwacctconf();

# Determine default shell
    my $shell = $cref->{'DEFSHELL'};
    if ( !$shell || !-e $shell ) {
        $shell = '/bin/bash';
    }

my $homedir = Cpanel::PwCache::gethomedir($user);
    my %CPCONF  = Cpanel::Config::LoadCpConf::loadcpconf();
    if ( exists $CPCONF{'acls'} && $CPCONF{'acls'} eq '1' ) {
        if ( my $pid = fork() ) {
            waitpid( $pid, 0 );
        }
        else {
            Cpanel::Sys::Setsid::Fast::fast_setsid();
            Cpanel::SafetyBits::setuids($user);
            system(
                'setfacl',
                '-kb',
                '-m', 'group:nobody:x',
                '-m', 'group:mail:x',
                '-m', 'group:cpanel:x',
                '-m', 'group:mailnull:x',
                '-m', 'group:65535:x',
                '-m', 'group:ftp:x', '--',
                $homedir
            );
            chmod 0750, $homedir;
            exit;
        }
    }
    else {
        chmod( 0711, $homedir );    # root owns parent
    }

if ( -e '/var/cpanel/fileprotect' ) {
        my $httpgid = ( getgrnam('nobody') )[2];
        my $useruid = ( getpwnam($user) )[2];
        Cpanel::SafetyBits::safe_userchgid( $useruid, $httpgid, $homedir . '/public_html' );
        Cpanel::SafetyBits::safe_chmod( 0750, $useruid, $homedir . '/public_html' );
        Cpanel::SafetyBits::safe_userchgid( $useruid, $httpgid, $homedir . '/.htpasswds' );
        Cpanel::SafetyBits::safe_chmod( 0750, $useruid, $homedir . '/.htpasswds' );

}
    else {
        Cpanel::SafetyBits::safe_chmod( 0755, $user, $homedir . '/public_html' );
        Cpanel::SafetyBits::safe_chmod( 0755, $user, $homedir . '/.htpasswds' );
    }

#
    # Since scripts/suspendacct will chagne the permissions of this file to 0000,
    # it is necessary to perform the chmod() operation as root to actually be able
    # to restore the permissions.
    #
    if ( -e '/var/cpanel/noanonftp' ) {
        Cpanel::SafetyBits::safe_chmod( 0750, $user, $homedir . '/public_ftp' );
    }
    else {
        Cpanel::SafetyBits::safe_chmod( 0755, $user, $homedir . '/public_ftp' );
    }

print "Unsuspending outgoing email....";
    Whostmgr::Accounts::Email::unsuspend_outgoing_email( 'user' => $user );
    print "Done\n";

my %SUINFO;
    if ( open my $suspended_info_fh, '<', '/var/cpanel/suspendinfo/' . $user ) {
        while ( readline $suspended_info_fh ) {
            chomp;
            my ( $name, $value ) = split( /=/, $_ );
            next if ( !$name || !$value );
            $SUINFO{$name} = $value;
        }
        close $suspended_info_fh;
        unlink '/var/cpanel/suspendinfo/' . $user;
    }

my $cpuser_guard = Cpanel::Config::CpUserGuard->new($user);
    my $cpuser_data  = $cpuser_guard->{'data'};
    delete $cpuser_data->{'SUSPENDED'};
    $cpuser_guard->save();

AcctLock::acctlock();

# Reset shell
    my $newshell;
    if    ( !$SUINFO{'shell'} )   { $newshell = '/usr/local/cpanel/bin/noshell'; }
    elsif ( -x $SUINFO{'shell'} ) { $newshell = $SUINFO{'shell'} }
    else                          { $newshell = $shell; }

try {
        Cpanel::Passwd::Shell::update_shell_without_acctlock( 'user' => $user, 'shell' => $newshell );
    }
    catch {
        print Cpanel::Exception::get_string($_) . "\n";
    };

my $crypted_pass = ( Cpanel::PwCache::getpwnam($user) )[1];
    $crypted_pass =~ s{^\!+}{}g;

my ( $status, $statusmsg ) = Cpanel::Auth::Shadow::update_shadow_without_acctlock( $user, $crypted_pass );
    print $statusmsg . "\n" if !$status;

AcctLock::acctunlock();

Cpanel::Auth::Digest::DB::Manage::unlock($user) if Cpanel::Auth::Digest::DB::Manage::has_entry($user);

my @DNS = ( $cpuser_data->{'DOMAIN'} );
    if ( exists $cpuser_data->{'DOMAINS'} ) { push @DNS, @{ $cpuser_data->{'DOMAINS'} } }

{
        my $tempquota = Cpanel::Quota::Temp->new( user => $user );
        $tempquota->disable();

if ( -e "$homedir/etc/webdav/shadow" ) {
            print "Unsuspending webdav users\n";
            unsuspendshadowfile( $user, "$homedir/etc/webdav/shadow" );
        }

foreach my $dns (@DNS) {
            $dns = Cpanel::Validate::Domain::Normalize::normalize( $dns, 1 );
            next if !Cpanel::Validate::Domain::Tiny::validdomainname($dns);
            if ( -f "${homedir}/etc/${dns}/shadow" && !-l "${homedir}/etc/${dns}/shadow" ) {
                print "Unsuspending email account logins for $dns .... ";
                unsuspendshadowfile( $user, "${homedir}/etc/${dns}/shadow" );
                print "Done\n";
            }
        }

Cpanel::Dovecot::Action::flush_all_auth_caches_for_user($user);
    }

my $dns_list             = join( '|', map { quotemeta($_) } @DNS );
    my $suspended_list_files = Cpanel::FileUtils::Match::get_matching_files(
        "$Cpanel::ConfigFiles::MAILMAN_ROOT/suspended.lists",
        "_(?:$dns_list)" . '$'
    );

foreach my $list ( @{$suspended_list_files} ) {
        my ($list_name) = $list =~ m{^.*/([^/]+)$};
        $list_name =~ tr{_}{@};
        print "Unsuspending mailing list for $list_name\n";

my $unsuspended_list = $list;
        $unsuspended_list =~ s/\/suspended.lists\//\/lists\//;
        if ( -e $unsuspended_list ) { rename( $unsuspended_list, $unsuspended_list . '.' . time() ) }
        rename( $list, $unsuspended_list );

Cpanel::Mailman::ListManager::regenerate_list($unsuspended_list);
    }

#FIXME: Everything in this script should eventually be done via this function call.
    try {
        Whostmgr::Accounts::Unsuspend->new($user);
    }
    catch {
        warn Cpanel::Exception::get_string($_);
    };

warn if !eval {
        Whostmgr::Accounts::SuspensionData::Writer->new()->unsuspend($user);
        1;
    };

print "Unsuspending websites...\n";
    Whostmgr::Accounts::Unsuspend::Htaccess::unsuspend_htaccess( $user, \@DNS );
    _generate_account_suspension_include();

my $ftpfile = "$Cpanel::ConfigFiles::FTP_PASSWD_DIR/$user";

# Manipulation of these files isn't thread safe.
    # The root file is intentionally locked before checking the existence of the suspended file.
    my $ftplock = Cpanel::SafeFile::safelock($ftpfile);
    if ( -e $ftpfile . '.suspended' ) {
        my $ftpsuspendedlock = Cpanel::SafeFile::safelock("$ftpfile.suspended");
        print "Unsuspending FTP accounts...\n";
        if ( -e $ftpfile ) {
            unlink $ftpfile;
        }
        rename $ftpfile . '.suspended', $ftpfile or warn "Could not rename $ftpfile.suspended to $ftpfile";
        Cpanel::SafeFile::safeunlock($ftpsuspendedlock);
    }
    Cpanel::SafeFile::safeunlock($ftplock);

Cpanel::ServerTasks::schedule_task( ['CpDBTasks'], 10, "ftpupdate" );

print "${user}'s account is now active\n";

# Unsuspending Team Accounts
    if ( -e "$Cpanel::Team::Constants::TEAM_CONFIG_DIR/$user" ) {
        print "Unsuspending team account ... ";
        eval { Cpanel::Team::Config->new($user)->unsuspend_team(); };
        $@ ? warn "Unable to suspend Team Account" : print "Done\n";
    }

my $domain = Cpanel::AcctUtils::Domain::getdomain($user);

my $user_crontab_dir = Cpanel::OS::user_crontab_dir();
    if ( -f "$user_crontab_dir.suspended/$user" ) {
        unlink "$user_crontab_dir/$user";
        rename "$user_crontab_dir.suspended/$user", "$user_crontab_dir/$user";
    }

if ( Cpanel::Services::Enabled::are_provided('mysql') ) {
        print "Unsuspending mysql users\n";
        Cpanel::MysqlUtils::Suspension::unsuspend_mysql_users($user);
    }

my $owner = Cpanel::AcctUtils::Owner::getowner($user);
    $owner =~ s/\n//g;
    my $host;
    if ( $owner eq '' || $owner eq 'root' || $user eq $owner ) {
        $host = Cpanel::Hostname::gethostname();
    }
    else {
        $host = Cpanel::AcctUtils::Domain::getdomain($owner);
    }

#if the account reseller does not exist on this server we fall back to root
    if ( !$host ) {
        $host  = Cpanel::Hostname::gethostname();
        $owner = 'root';
    }

my %account_unsuspension_notification = (
        'user'              => $user,
        'user_domain'       => $domain,
        'env_remote_user'   => $ENV{'REMOTE_USER'},
        'env_user'          => $ENV{'USER'},
        'host_server'       => $host,
        'origin'            => 'Unsuspend Account',
        'source_ip_address' => Cpanel::IP::Remote::get_current_remote_ip(),
    );

# send root notification

Cpanel::Notify::notification_class(
        'class'            => 'unsuspendacct::Notify',
        'application'      => 'unsuspendacct::Notify',
        'constructor_args' => [%account_unsuspension_notification]
    );

# send one to account reseller as well as long as they are not root
    if ( $owner ne 'root' ) {
        Cpanel::Notify::notification_class(
            'class'            => 'unsuspendacct::Notify',
            'application'      => 'unsuspendacct::Notify',
            'constructor_args' => [ %account_unsuspension_notification, 'to' => $owner, 'username' => $owner ]
        );
    }

Cpanel::AcctUtils::AccountingLog::append_entry( 'UNSUSPEND', [ $user, $domain ] );

Cpanel::PwCache::Clear::clear_global_cache();
    do_hook( $user, 'post' );
    system '/usr/local/cpanel/scripts/postunsuspendacct', @argv if -x '/usr/local/cpanel/scripts/postunsuspendacct';

# The new default is to remove all backend service proxying unless otherwise specified
    if ($retain_service_proxies) {
        print "Keep service proxying settings for this account...Done\n";
    }
    else {
        {
            print "The system will disable service proxying for this account...";
            require Cpanel::AccountProxy::Transaction;
            local $SIG{'__WARN__'} = sub { print "\n" . shift . "\n" };

Cpanel::AccountProxy::Transaction::unset_all_backends_and_update_services($user);
            print "Done\n";
        }
    }

print "$user\'s account has been unsuspended\n";

return 0;
}

sub do_hook {
    my ( $user,   $stage )      = @_;
    my ( $result, $hooks_msgs ) = Cpanel::Hooks::hook(
        {
            'category'      => 'Whostmgr',
            'event'         => 'Accounts::unsuspendacct',
            'stage'         => $stage,
            'escalateprivs' => 1,
        },
        {
            'args' => {
                'user' => $user,
            },
            'result' => 1,
            'user'   => 'root',
        },
    );
    if ( ref $hooks_msgs eq 'ARRAY' && @$hooks_msgs != 0 ) {
        foreach my $error ( @{$hooks_msgs} ) {
            print $error;
        }
        return 0;
    }
    return 1;
}

sub unsuspendshadowfile {
    my ( $user, $file ) = @_;

my $access_ids = Cpanel::AccessIds::ReducedPrivileges->new($user);
    return _unsuspendshadowfile($file);
}

sub _unsuspendshadowfile {
    my ($file) = @_;
    return if !-e $file;
    my $shadowlock = Cpanel::SafeFile::safeopen( \*SHF, '+<', $file );
    if ( !$shadowlock ) {
        $logger->die("Could not update $file: $!");
    }
    my @CT = <SHF>;
    seek( SHF, 0, 0 );
    foreach (@CT) {
        my @DC = split( /:/, $_ );
        chomp( $DC[$#DC] );
        foreach my $field ( 1, 8 ) {
            while ( $DC[$field] =~ m/^\*LOCKED\*/ ) {
                $DC[$field] =~ s/^\*LOCKED\*//;
            }
        }
        print SHF join( ':', @DC ) . "\n";
    }
    truncate( SHF, tell(SHF) );
    return Cpanel::SafeFile::safeclose( \*SHF, $shadowlock );
}

sub _generate_account_suspension_include {
    require "/usr/local/cpanel/scripts/generate_account_suspension_include";    ## no critic qw(Modules::RequireBarewordIncludes) -- refactoring this is too large
    generate_account_suspension_include::update_include_and_restart_httpd();
    return 1;
}

sub usage {
    my ( $retval, $msg ) = @_;
    my $fh = $retval ? \*STDERR : \*STDOUT;

my $p = $0;
    $p =~ s{^.+/(.+)$}{$1};

if ( !defined $msg ) {
        $msg = <<EOF;
Usage: $p user [--retain-service-proxies] [--usage | --help]

Unsuspend a user's account

where
    user -- is a valid user name (required)

If --retain-service-proxies is specified, then any service proxy backends that
    were put in place as a result of a transfer-related suspension will be retained.

The --child-ok argument defeats the usual protection against
    unsuspending distributed accounts on child nodes. Ordinarily you should
    suspend and unsuspend distributed accounts on their parent nodes.
    Use of this flag is UNSUPPORTED.

Now supports driving instructions via --help, --usage
EOF
    }

print {$fh} $msg;
    return $retval;
}