Error: Warning: fread() [function.fread]: Length parameter ...

[thinkpad]

Not really sure if this goes in this forum, or the Apache server forum, but we have a linux mail server, and an online webmail login. Sometimes, when users try to login, they will receive an error reading something like this:

Warning: fread() [function.fread]: Length parameter must be greater
than 0 in /home/admispconfig/ispconfig/web/webmail/inc/lib.php on line
106

Warning: Cannot modify header information - headers already sent by
(output started at
/home/admispconfig/ispconfig/web/webmail/inc/lib.php:106) in
/home/admispconfig/ispconfig/web/webmail/inc/inc.php on line 103


If I restart the mail server, the issue goes away. It will then resurface within a week or two.

Any ideas, suggestion, or direction?

[falko]

What webmail package do you use? SquirrelMail, RoundCube, etc.?

[thinkpad]

Hi Falko,

Thanks for the response. The mail package is Uebimiau.

[falko]

Can you post the lines around line 106 from /home/admispconfig/ispconfig/web/webmail/inc/lib.php?

[thinkpad]

Hi Falko,

These are lines 70 to 140. Thanks.

PHP Code:

root@mail:/home/admispconfig/ispconfig/web/webmail/inc# sed -n '70,140p' lib.php
function array_qsort2 (&$array, $column=0, $order="ASC", $first=0, $last= -2) {
        if($last == -2) $last = count($array) - 1;
        if($last > $first) {
                $alpha = $first;
                $omega = $last;
                $guess = $array[$alpha][$column];
                while($omega >= $alpha) {
                        if($order == "ASC") {
                                while(strtolower($array[$alpha][$column]) < strtolower($guess)) $alpha++;
                                while(strtolower($array[$omega][$column]) > strtolower($guess)) $omega--;
                        } else {
                                while(strtolower($array[$alpha][$column]) > strtolower($guess)) $alpha++;
                                while(strtolower($array[$omega][$column]) < strtolower($guess)) $omega--;
                        }
                        if(strtolower($alpha) > strtolower($omega)) break;
                        $temporary = $array[$alpha];
                        $array[$alpha++] = $array[$omega];
                        $array[$omega--] = $temporary;
                }
                array_qsort2 ($array, $column, $order, $first, $omega);
                array_qsort2 ($array, $column, $order, $alpha, $last);
        }
}


class Session {

        var $temp_folder;
        var $sid;

        function Load() {
                $sessionfile = $this->temp_folder."_sessions/".$this->sid.".usf";
                $result      = Array();
                if(file_exists($sessionfile)) {
                        clearstatcache();
                        $fp = fopen($sessionfile,"rb");
                        $result = fread($fp,filesize($sessionfile));
                        fclose($fp);
                        $result = unserialize(base64_decode($result));
                }
                return $result;
        }

        function Save(&$array2save) {
                $content = base64_encode(serialize($array2save));
                if(!is_writable($this->temp_folder)) die("<h3>The folder \"".$this->temp_folder."\" is not writtable or does not exist!!!</h3>");
                $sessiondir = $this->temp_folder."_sessions/";
                if(!file_exists($sessiondir)) mkdir($sessiondir,0777);
                $f = fopen("$sessiondir".$this->sid.".usf","wb") or die("<h3>Could not open session file</h3>");
                fwrite($f,$content);
                fclose($f);
                return 1;
        }
        function Kill() {
                $sessionfile = $this->temp_folder."_sessions/".$this->sid.".usf";
                return @unlink($sessionfile);
        }
}


// load settings
function load_prefs() {

        global  $userfolder,
                        $sess,
                        $default_preferences;

        extract($default_preferences);

        $pref_file = $userfolder."_infos/prefs.upf"; 


[falko]

        function Load() {
                $sessionfile = $this->temp_folder."_sessions/".$this->sid.".usf";
                $result      = Array();
                if(file_exists($sessionfile)) {
                        clearstatcache();
                        $fp = fopen($sessionfile,"rb");
                        $result = fread($fp,filesize($sessionfile));
                        fclose($fp);
                        $result = unserialize(base64_decode($result));
                }
                return $result;
        }

Looks as if the session file exists, but is empty. I think you should delete all session files in the temp folder.

[thinkpad]

Sorry for my ignorance, but sessions files are listed as what?

I'm in home/admispconfig/ispconfig/temp/

And then open the 'webmail' directory. There I find a list of all (or most) of the email users. (ie emailaddress_localhost) Are those what I should delete?

ps there is a lot of ispconfig.log.*.tar.gz files in the ispconfig directory. Are they fine?

[thinkpad]

? bumpppppp

[public_domain]

may i suggest to look that your cookies may show that you actually have 2 simultaneous sessions. look at the "PATH" for the sessions. happened to me. reads one, writes another. pretty easy fix.

[thinkpad]

Thanks Public_Domain.

Any additional thoughts Falko?