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

# cpanel - scripts/purge_old_config_caches         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 Cpanel::AccessIds::SetUids ();
use Cpanel::PwCache::Build     ();
use Cpanel::Logger             ();

#
# This script removes any caches in /var/cpanel/configs.cache that are older then 7 days
#

my $logger;
my $TTL = ( 86400 * 14 );    # 14 days
my $now = time();

if ( !-d '/var/cpanel/configs.cache' ) {
    mkdir( '/var/cpanel/configs.cache', 0700 ) || die;
}
Cpanel::PwCache::Build::init_passwdless_pwcache();

my $pwcache_ref = Cpanel::PwCache::Build::fetch_pwcache();

purge_dirs( [ 0, 0, '/var/cpanel/configs.cache' ] );

if ( grep( /--userdirs/, @ARGV ) ) {
    purge_dirs(
        map  { [ $_->[2], $_->[3], $_->[7] . '/.cpanel/caches/config' ] }
        grep { $_->[7] && -e $_->[7] . '/.cpanel/caches/config' } @{$pwcache_ref}
    );
}

sub purge_dirs {
    foreach my $purge_ref (@_) {
        my ( $uid, $gid, $dir ) = @$purge_ref;
        if ( $uid == $> || $gid == ( split( /\s+/, $) ) )[0] ) {
            _purge_dir($dir);
        }
        else {
            if ( my $pid = fork() ) {
                waitpid( $pid, 0 );
            }
            elsif ( defined $pid ) {
                Cpanel::AccessIds::SetUids::setuids( $uid, $gid ) || die;
                _purge_dir($dir);
                exit;
            }
            else {
                $logger ||= Cpanel::Logger->new();
                $logger->warn("Failed to fork()");
            }
        }
    }

    return;
}

sub _purge_dir {
    my $dir = shift;
    my $mtime;
    if ( opendir( my $cachefile_dir, $dir ) ) {
        unlink(
            map  { $dir . '/' . $_ }
            grep { !/^\.+$/ && ( ( $mtime = ( stat( $dir . '/' . $_ ) )[9] ) + $TTL < $now || $mtime > $now ) } readdir($cachefile_dir)
        );
        closedir $cachefile_dir;
    }

    return;
}