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

# cpanel - scripts/clear_orphaned_virtfs_mounts    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

use strict;
use warnings;
use Cpanel::Config::LoadUserDomains ();
use Getopt::Param                   ();
use Cpanel::Filesys::Virtfs         ();
use Cpanel::PwCache::Get            ();
use Cpanel::CloudLinux::CageFS      ();

my $prm = Getopt::Param->new(
    {
        'help_coderef' => sub {
            print <<"END_USAGE";
Unmount any virtfs mounts whose users no longer exist or whose shell is not currently jailshell/noshell

$0 [--help] [--errorsonly] [--inactiveonly] [--clearall] [--user=<user>]

  $0 --help         - this screen
  $0 --user=<user>  - Only cleanup the specified user
  $0 --errorsonly   - Do not have any output unless there are errors
  $0 --inactiveonly - Only cleanup for users with no running processes
  $0 --clearall     - Unmount all virtfs mounts regardless of user's jailshell/noshell status

END_USAGE
            exit;
        },
    }
);

my %user_map     = %{ Cpanel::Config::LoadUserDomains::loaduserdomains( undef, 0, 1 ) };
my $errorsonly   = $prm->get_param('errorsonly')   ? 1 : 0;
my $clear_all    = $prm->get_param('clearall')     ? 1 : 0;
my $inactiveonly = $prm->get_param('inactiveonly') ? 1 : 0;
my $user         = $prm->get_param('user');

if ($inactiveonly) {
    Cpanel::Filesys::Virtfs::cleanup_inactive_virtfs();
    Cpanel::Filesys::Virtfs::cleanup_unmounts_virtfs_for_dead_users( verbose => !$errorsonly );
    exit(0);
}

clear_orphaned_virtfs_mounts();
Cpanel::Filesys::Virtfs::cleanup_unmounts_virtfs_for_dead_users( verbose => !$errorsonly, user => $user );

sub clear_orphaned_virtfs_mounts {

    my %processed_users;
    my %cagefs_users = map { $_ => 1 } Cpanel::CloudLinux::CageFS::enabled_users();

    for my $mount ( Cpanel::Filesys::Virtfs::get_virtfs_mounts() ) {
        my $username = Cpanel::Filesys::Virtfs::get_username_from_virtfs_mount_string($mount);
        next if length $user && $username ne $user;
        next if exists $processed_users{$username};

        print "-- Begin user '$username' --\n" unless $errorsonly;

        my $umount = 0;
        if ( !exists $user_map{$username} ) {
            print "User no longer exists, cleaning orphan...\n" unless $errorsonly;
            $umount++;
        }
        elsif ( $clear_all || Cpanel::PwCache::Get::getshell($username) !~ m{(?:no|jail)shell} ) {
            print "User no longer has jailshell or noshell, cleaning orphan...\n" unless ( $errorsonly || $clear_all );
            $umount++;
        }
        elsif ( $cagefs_users{$username} ) {
            print "User has CageFS enabled, cleaning orphan...\n" unless $errorsonly;
            $umount++;
        }
        else {
            print "No action needed\n" unless $errorsonly;
        }

        if ($umount) {
            print "Cleaning virtfs mounts (if any)\n" unless $errorsonly;
            my ( $rc, @errors ) = Cpanel::Filesys::Virtfs::remove_user_virtfs($username);
            if ($rc) {
                print "Done\n" unless $errorsonly;
                $processed_users{$username}++;
            }
            else {
                print "Failed\n" . join( "\t", @errors ) . "\n";
            }
        }
        else {
            $processed_users{$username}++;
        }

        print "-- End user '$username' -- \n\n" unless $errorsonly;
    }

    return;
}
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