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Date: Mon, 03 Aug 2009 11:01:03 +0300
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Subject: Re: [PHP-DEV] fopen_wrappers.c DOCUMENT_ROOT .htaccess error
From: jani.taskinen@sci.fi (Jani Taskinen)

On 08/03/2009 07:52 AM, daniel@zoltak.com wrote:
>>> Jani Taskinen wrote:
> [snip]
>>>> You obviously do not have the correct sources then.
>>>> Try get them directly using SVN:
>>>>
>>>> # svn co http://svn.php.net/repository/php/php-src/branches/PHP_5_2/
>>>>
>>>> And if those don't work either, you need to provide a GDB backtrace,
>>>> the
>>>> strace is useless for this. Also make sure you configure PHP using
>>>> --enable-debug !!
>
> I have compile both apache and php using debug and run gdb with the
> following result:

Obviously you haven't compiled using --enable-debug OR most likely are 
not using the compiled libphp5.so. Check your phpinfo() that you 
actually use the one you compiled first..

--Jani

> #0 0x00007f3e96df82eb in ?? () from /usr/lib64/apache2/modules/libphp5.so
> #1 0x00007f3e96dfb085 in zend_hash_find () from
> /usr/lib64/apache2/modules/libphp5.so
> #2 0x00007f3e96d9229c in custom_open_base_check () from
> /usr/lib64/apache2/modules/libphp5.so
> #3 0x00007f3e96d90c56 in php_check_specific_open_basedir () from
> /usr/lib64/apache2/modules/libphp5.so
> #4 0x00007f3e96d9107f in php_check_open_basedir_ex () from
> /usr/lib64/apache2/modules/libphp5.so
> #5 0x00007f3e96d90fd4 in php_check_open_basedir () from
> /usr/lib64/apache2/modules/libphp5.so
> #6 0x00007f3e96d86adb in ?? () from /usr/lib64/apache2/modules/libphp5.so
> #7 0x00007f3e96e05346 in zend_alter_ini_entry_ex () from
> /usr/lib64/apache2/modules/libphp5.so
> #8 0x00007f3e96e0511c in zend_alter_ini_entry () from
> /usr/lib64/apache2/modules/libphp5.so
> #9 0x00007f3e96e77ded in apply_config () from
> /usr/lib64/apache2/modules/libphp5.so
> #10 0x00007f3e96e77033 in ?? () from /usr/lib64/apache2/modules/libphp5.so
> #11 0x0000000000436633 in ap_run_handler ()
> #12 0x0000000000439511 in ap_invoke_handler ()
> #13 0x00000000004430b4 in ap_process_request ()
> #14 0x0000000000440706 in ?? ()
> #15 0x000000000043ceb4 in ap_run_process_connection ()
> #16 0x0000000000446db7 in ?? ()
> #17 0x0000000000447012 in ?? ()
> #18 0x00000000004470ac in ?? ()
> #19 0x0000000000447cc8 in ap_mpm_run ()
> #20 0x0000000000425ab3 in main ()
>
> The function custom_open_base_check() contains:
>
> // Document root from Zend (pointer to pointer)
> zval **document_root = NULL;
>
> // Make sure DOCUMENT_ROOT is accessible from the global vars
> if (!PG(http_globals)[TRACK_VARS_SERVER] ||
> zend_hash_find(PG(http_globals)[TRACK_VARS_SERVER]->value.ht,
> "DOCUMENT_ROOT",
> sizeof("DOCUMENT_ROOT"), (void **) &document_root) == FAILURE) {
>
> // Unable to find DOCUMENT_ROOT
> php_error_docref(NULL TSRMLS_CC, E_WARNING, "fopen_wrapper_patch:
> DOCUMENT_ROOT variable
> is not set, cannot determine document root.");
>
> // Can't check the document root - fail
> return -1;
> }
>
> It crashing when its looking up the DOCUMENT_ROOT in the zend_hash_find.
> This only occurs when the following is defined in an htaccess and with
> the custom function in place:
>
> [snip]
> php_value error_log '/home/st/stu/studio1.com.au/www/logs/php_err.log'
>
> Is it safe to access the DOCUMENT_ROOT this way at this point in the
> code? If not is there an alternative or is there something wrong
> somewhere else in the code?
>
> If you could guide me on how to produce the necessary output to debug it
> would be much appreciated.
>
> Thanks
>