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我有个问题。我有一个脚本，在 N 时间后将文件发送到电子邮件（从 crontab 执行）问题是，我尝试从 maillog 输出到 mysql。

这是一个脚本

#!/usr/bin/php
<?php
date_default_timezone_set("Europe/Chisinau");
$faxdir = '/var/spool/fax/';
$dir = opendir("/var/spool/fax/");
while(($file = readdir($dir)) !== false){
if (($file != ".") && ($file != "..")){
    $mytime = date('d-m-Y H:i:s');
    $sendfile = $file;
    $findcaller = explode('_', $file);
    $findcaller = explode('-', $file);
    $findsrc = shell_exec('echo "'.$findcaller[0].'" | sed "s/[^_]*\_//"');
    $findsrc = str_replace(array("\r","\n"),"",$findsrc);
    $caller = shell_exec('echo "'.$findcaller[1].'" | sed "s/[^_]*\_//"');
    $cutbillid = shell_exec('echo "'.$file.'" | sed "s/[^_]*\_//"');
    $findnumber = shell_exec('echo "'.$cutbillid.'" | sed "s/[^-]*\-//"');
    $findnumber=str_replace(array("\r","\n"),"",$findnumber);
    $key = '.TIF';
    $number=preg_replace('/'.$key.'.*/','',$findnumber);
    $showstatus = shell_exec('/usr/sbin/lsof | grep "'.$faxdir.'"*"'.$number.'"');

    if ($showstatus <> ""){
        exit(0);
    }else{
        $db_link = mysql_connect("localhost", "root", "") 
            or die("Could not connect: " . mysql_error());
        mysql_select_db("centrexdb");
        $query = mysql_query("SELECT `fax2email` FROM users WHERE username='".$number."' AND faxstatus='1'");
        $fax2email = mysql_fetch_array($query);
        if ($fax2email[0] == ''){
            $currdate = shell_exec('echo "'. date('Y-m-d_H:i:s') .'"');
    $noemail = shell_exec('mv /var/spool/fax/"'.$file.'" /var/spool/fax-nomail/"'.$currdate.'"--"'.$file.'"');
        } else {
            $findcaller = explode('_', $file);
            $findcaller = explode('-', $file);
            $caller = shell_exec('echo "'.$findcaller[1].'" | sed "s/[^_]*\_//"');
            $caller=str_replace(array("\r","\n"),"",$caller);
$sendmail = shell_exec('echo | mutt -a "'.$faxdir.'""'.$sendfile.'" -s "Fax From '.$findsrc.' to '.$number.'" "'.$fax2email[0].'"');
echo "executing";
        unlink(''.$faxdir.''.$sendfile.'');
        }
        mysql_close($db_link);
    }
}
sleep(45);
$dbnew = mysql_connect("localhost", "root", "")
or die("Could not connect: " . mysql_error());
mysql_select_db("FAX");
$myresult=shell_exec('cat /var/log/maillog |grep "to=<'.$fax2email[0].'>" |tail -n1');
echo $myresult;
$currentdate = shell_exec('echo "'. date('Y-m-d_H:i:s') .'"');
$umail = $fax2email[0];
mysql_query("INSERT into faxlog (Date, UserNumber, SourceNumber, UsedEmail, MailLog)     VALUES('$mytime', '$number', '$findsrc',
'$umail', '$myresult')");
mysql_close($dbnew);
sleep(5);
}

exit(0);
?>

问题是，如果文件夹中有多个文件，则第一个文件脚本会从日志过去的值返回，因为日志需要一段时间才能写入。我完成了 tail -f /var/log/maillog ，我发现邮件命令在 45 秒延迟后执行。据我了解，我需要运行带有文件发送的主块，并在延迟后（要写入日志）获取日志内容。那么我该怎么做呢？

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