ID: 36555
User updated by: p at damezin dot com
-Summary: realpath_cache bug: readfile get old data after a
symlink over an existing link
Reported By: p at damezin dot com
Status: Bogus
Bug Type: Filesystem function related
Operating System: Linux OpenBSD
PHP Version: 5.2.0
New Comment:
New simplified testcase :
<?php
define('TEST_FILE1', '/tmp/testfile1');
define('TEST_LINK', '/tmp/testlink');
file_put_contents(TEST_FILE1, '42');
// create TEST_LINK pointing on TEST_FILE1 using a temporary filename
(needed)
$tmp_link_name = TEST_LINK . uniqid(time());
symlink(TEST_FILE1, $tmp_link_name);
rename($tmp_link_name, TEST_LINK);
// reading this link/file
file_get_contents(TEST_LINK);
// remove the link (we have the same bug making this link pointing
somewhere else)
unlink(TEST_LINK);
$good_result = '';
// clearstatcache have no effect
clearstatcache();
// fetching result, must be empty (link does not exist)
$result = @file_get_contents(TEST_LINK);
// on bogus php it return TEST_FILE1 content
echo "TEST : " . (($result == $good_result) ?
'SUCCEED' : 'FAILED') . "\n";
echo "result : '" . $result . "' | ";
echo "expected : '" . $good_result . "'\n";
echo "php version : " . PHP_VERSION."\n";
echo "realpath_cache_size (if available) : " .
@ini_get('realpath_cache_size') . "\n";
// cleaning
@unlink(TEST_LINK);
unlink(TEST_FILE1);
?>
Previous Comments:
------------------------------------------------------------------------
[2006-11-03 12:07:58] p at damezin dot com
new summary (perhaps it would make this bug more interesting...)
Bug on 5.2.0 is verified with default configuration (without php.ini)
and sources provided from php.net (no patch from a portage).
------------------------------------------------------------------------
[2006-11-03 12:00:15] p at damezin dot com
still have this problem on 5.2.
------------------------------------------------------------------------
[2006-10-12 22:00:43] p at damezin dot com
still have this problem on 5.1.6
------------------------------------------------------------------------
[2006-10-12 21:57:35] p at damezin dot com
Still have this problem on 5.1.4
------------------------------------------------------------------------
[2006-02-28 11:22:30] p at damezin dot com
It's the same with clearstatcache(), this is why you can see it comment
in the testcase. It have no influence.
------------------------------------------------------------------------
The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/36555
--
Edit this bug report at http://bugs.php.net/?id=36555&edit=1
