Bug #49753 [Opn->Csd]: Current directory in shutdown function leaks between requests

Edit report at https://bugs.php.net/bug.php?id=49753&edit=1 ID: 49753 Updated by: pollita@php.net Reported by: ant at specialops dot ath dot cx Summary: Current directory in shutdown function leaks between requests -Status: Open +Status: Closed Type: Bug Package: Scripting Engine problem Operating System: Linux 2.6.30 (gentoo) PHP Version: 5.3.0 -Assigned To: +Assigned To: pollita Block user comment: N Private report: N New Comment: I'm fairly certain this is fixed in current PHP. If I'm wrong, please feel free to reopen this bug report. Please include webserver version and output of: php -i | grep 'Configure Command' Previous Comments: ------------------------------------------------------------------------ [2009-10-12 01:00:00] php-bugs at lists dot php dot net No feedback was provided for this bug for over a week, so it is being suspended automatically. If you are able to provide the information that was originally requested, please do so and change the status of the bug back to "Open". ------------------------------------------------------------------------ [2009-10-07 16:38:54] ant at specialops dot ath dot cx I've just tested it, and it does indeed fix the problem. ------------------------------------------------------------------------ [2009-10-04 15:21:57] kalle@php.net We could store the cwd before trying to execute the shutdown handlers, and then restore it to that dir after the handlers are executed. However I'm not sure whether we should do this on per SAPI level or per function implementation level, below patch patches it per function level. Could you try apply this and see if it solves the problem? Index: basic_functions.c =================================================================== --- basic_functions.c (revision 289184) +++ basic_functions.c (working copy) @@ -5026,10 +5026,17 @@ void php_call_shutdown_functions(TSRMLS_D) /* {{{ */ { if (BG(user_shutdown_function_names)) { + char *cwd = getcwd(NULL, 0); + zend_try { zend_hash_apply(BG(user_shutdown_function_names), (apply_func_t) user_shutdown_function_call TSRMLS_CC); } zend_end_try(); + + if (cwd) { + chdir(cwd); + } + php_free_shutdown_functions(TSRMLS_C); } } ------------------------------------------------------------------------ [2009-10-02 19:00:37] ant at specialops dot ath dot cx Description: ------------ In 5.3.0 one of my scripts stopped working due to the behaviour documented at the bottom of the register_shutdown_function page. The actual problem is that if I change the directory in the shutdown function, that change persists across requests and can end up in completely unrelated scripts' shutdown function calls. Reproduce code: --------------- <?php echo "Script A\n"; function test() { echo getcwd() . "\n"; if ( file_exists('file.inc') ) { include 'file.inc'; } } register_shutdown_function('test'); ?> <?php echo "Script B\n"; function change() { chdir('/tmp/'); file_put_contents('file.inc', '<?php echo "something nasty\n"; ?>'); } register_shutdown_function('change'); ?> Expected result: ---------------- Script A /var/www/localhost/htdocs/ Script B Script A /var/www/localhost/htdocs/ Actual result: -------------- Script A /var/www/localhost/htdocs/ Script B Script A /tmp something nasty ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=49753&edit=1