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

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?

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

Hi Falko,

Thanks for the response. The mail package is Uebimiau.

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

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";

Code:

        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.

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?

session is there but empty...

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.

Thanks Public_Domain.

Any additional thoughts Falko?