Doc #77406 [NEW]: document open_basedirs disabling effect on the realpath cache

From: Date: Thu, 03 Jan 2019 04:29:51 +0000
Subject: Doc #77406 [NEW]: document open_basedirs disabling effect on the realpath cache
Groups: php.doc.bugs 
Request: Send a blank email to doc-bugs+get-16285@lists.php.net to get a copy of this message
From:             wbob at buerotiger dot de
Operating system: Linux
PHP version:      7.3.0
Package:          Safe Mode/open_basedir
Bug Type:         Documentation Problem
Bug description:document open_basedirs disabling effect on the realpath cache

Description:
------------
if open_basedir is set, the realpath cache will be disabled.

See https://bugs.php.net/bug.php?id=52312#1279034613
and its follow-up
https://bugs.php.net/bug.php?id=53263

This is underdocumented. Beyond the source
(https://github.com/php/php-src/blob/PHP-7.3.0/main/main.c#L1800), one
can find it in the long comments to ini.core and in the realpath_cache_*
function comments. The configuration documentation should make the
information on the relation of open_basedir to the realpath cache easily
accessible.

The difference of a disabled realpatch cache can be significant enough
to discuss alternative means of isolation to open_basedir.

This patch adds two notes: one within the open_basedir option
description and one in the performance tuning section listing the
realpath_cache options.


-- 
Edit bug report at https://bugs.php.net/bug.php?id=77406&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=77406&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=77406&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=77406&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=77406&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=77406&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=77406&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=77406&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=77406&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=77406&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=77406&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=77406&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=77406&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=77406&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=77406&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=77406&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=77406&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=77406&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=77406&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=77406&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=77406&r=mysqlcfg



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