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Bug #4360 Session files empty
Submitted: 2000-05-09 15:43 UTC Modified: 2000-06-13 09:41 UTC
From: cortex at execpc dot com Assigned:
Status: Closed Package: Misbehaving function
PHP Version: 4.0 Release Candidate 1/2 OS: FreeBSD 4.0
Private report: No CVE-ID: None
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From: cortex at execpc dot com
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 [2000-05-09 15:43 UTC] cortex at execpc dot com 
/* The following script does not work.
 * $count is never incremented from page to page
 * Session files in /tmp are 0 bytes, yet
 * are read/writable by the Apache user!
 */
<?php
session_register("count");
$count++;
?>

<p>Been here <?php echo $count; ?> times.</p>

<p><a href="<?php echo $PHP_SELF; ?>?<?=SID?>">Continue</a></p>

/* End of script */

Configure command: './configure' '--enable-track-vars' '--with-apxs=/usr/local/sbin/apxs' '--enable-bcmath' '--with-ftp'
'--with-gd=/usr/local' '--with-gettext' '--with-ttf' '--with-mysql' '--with-config-file-path=/usr/local/etc' '--with-ldap'

## php.ini session portion ##
session.save_handler      = files
session.save_path         = /tmp
session.use_cookies       = 1
session.name              = PHPSESSID
session.auto_start        = 0
session.cookie_lifetime   = 0
session.cookie_path       = /
session.cookie_domain     =
session.serialize_handler = php
session.gc_probability    = 1
session.gc_maxlifetime    = 1440
session.referer_check     =
session.entropy_length    = 0
session.entropy_file      =
session.cache_limiter     = nocache
session.cache_expire      = 180

Running Apache 1.3.12+PHP4.0RC1+SSL
No other known PHP-related issues

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 [2000-05-11 00:47 UTC] cortex at execpc dot com 
Seems to be related to <VirtualHost> paramaters in Apache's configuration file.  Commenting out my virtualhosts solved the problem.  Then, adding them back one at a time, the problem started happening as soon as I had more than two 'CustomLog' or 'ErrorLog' directives piping their information to an external program (Cronolog, http://www.ford-mason.co.uk/resources/cronolog).

So, now it looks like if I have more than two virtualhost log commands sending piping to external programs, PHP sessions stop working!!

Nothing else is acting strange on this machine.
 [2000-06-13 09:41 UTC] stas at cvs dot php dot net 
Closed per user request. See comment below:

>     IIRC the problem was that Apache got an fd from open(2), then
>     the PHP module started and got the same fd again. The strange
>     thing was that Apache did not close the fd in the meantime.
>     It's probably a bug in FreeBSD, at least noone has reported
>     this problem on any other OS.
> 
>     - Sascha
 
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