#48111 [NEW]: unlink won't delete symlinks without a target

From: Date: Wed, 29 Apr 2009 17:42:49 +0000
Subject: #48111 [NEW]: unlink won't delete symlinks without a target
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-136517@lists.php.net to get a copy of this message 
From:             simon at stienen dot name
Operating system: FreeBSD 7.1-RELEASE/amd64
PHP version:      5.2.9
PHP Bug Type:     Filesystem function related
Bug description:  unlink won't delete symlinks without a target

Description:
------------
unlink()ing a symlink with its target missing fails with an open_basedir
error.

This might be related to
http://bugs.php.net/bug.php?id=20235 (actual
deletion changed, but
sanitization still uses target?) and/or
http://bugs.php.net/bug.php?id=29145 (missing
target (empty string?) is
considered to be outside of open_basedir?)


Reproduce code:
---------------
<?php

echo "creating link\n";
symlink('nonexisting_target', 'link');

echo "unlinking link\n";
unlink('link');

echo "creating target\n";
file_put_contents('nonexisting_target', 'foo');

echo "unlinking link (again)\n";
unlink('link');

echo "unlinking target\n";
unlink('nonexisting_target');


Expected result:
----------------
Run with php -d open_basedir=

creating link
unlinking link
creating target
unlinking link (again)

Warning: unlink(link): No such file or directory in /tmp/- on line 13
unlinking target


Actual result:
--------------
Run with php -d open_basedir=/

creating link
unlinking link

Warning: unlink(): open_basedir restriction in effect. File(link) is not
within the allowed path(s): (/) in /tmp/- on line 7
creating target
unlinking link (again)
unlinking target

-- 
Edit bug report at http://bugs.php.net/?id=48111&edit=1
-- 
Try a CVS snapshot (PHP 5.2):        http://bugs.php.net/fix.php?id=48111&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):        http://bugs.php.net/fix.php?id=48111&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):        http://bugs.php.net/fix.php?id=48111&r=trysnapshot60
Fixed in CVS:                        http://bugs.php.net/fix.php?id=48111&r=fixedcvs
Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=48111&r=needdocs
Fixed in release:                    http://bugs.php.net/fix.php?id=48111&r=alreadyfixed
Need backtrace:                      http://bugs.php.net/fix.php?id=48111&r=needtrace
Need Reproduce Script:               http://bugs.php.net/fix.php?id=48111&r=needscript
Try newer version:                   http://bugs.php.net/fix.php?id=48111&r=oldversion
Not developer issue:                 http://bugs.php.net/fix.php?id=48111&r=support
Expected behavior:                   http://bugs.php.net/fix.php?id=48111&r=notwrong
Not enough info:                     http://bugs.php.net/fix.php?id=48111&r=notenoughinfo
Submitted twice:                     http://bugs.php.net/fix.php?id=48111&r=submittedtwice
register_globals:                    http://bugs.php.net/fix.php?id=48111&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=48111&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=48111&r=dst
IIS Stability:                       http://bugs.php.net/fix.php?id=48111&r=isapi
Install GNU Sed:                     http://bugs.php.net/fix.php?id=48111&r=gnused
Floating point limitations:          http://bugs.php.net/fix.php?id=48111&r=float
No Zend Extensions:                  http://bugs.php.net/fix.php?id=48111&r=nozend
MySQL Configuration Error:           http://bugs.php.net/fix.php?id=48111&r=mysqlcfg

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