Hi!!.
I'm trying to give users the chance to modify its cron from a webform.
The webform let's the users choose the day, month and minutes after
hour, then, using PHP I made one long string and save it into a file
($tmpnam), it looks like this:

        $content = "$min $hour $day * * /tmp/parse_maillog.sh"; //I obtain $min
$hour & $day earlier in my webform
        $tmpfname = tempnam ("/tmp/mail", "$username_crontab.txt");
                $handle = fopen($tmpfname, "w");
                        fwrite($handle, $content);
                        fclose($handle);

        system("crontab -u $username $username_crontab.txt");
        unlink($tmpfname);
Debugging this part I found that the file is OK, the problem is with the
"system" function, obviously a "user" problem, how can I fix it?? any
ideas?? I use phpSecurePages as an authentication system.

Thanx..

-- 
The explanation requiring the fewest assumptions is the most likely to
be correct. -- William of Occam

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