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Bug #79806 realpath() erroneously resolves link to link
Submitted: 2020-07-07 15:19 UTC Modified: 2020-07-28 12:05 UTC
From: cmb@php.net Assigned: cmb (profile)
Status: Closed Package: Filesystem function related
PHP Version: 7.3 OS: Windows NTS
Private report: No CVE-ID: None
 [2020-07-07 15:19 UTC] cmb@php.net
Description:
------------
On Windows realpath() only resolves the first level (soft or hard)
link, but does not go further.  This does neither match the
behavior on Linux (as far as I know), not the documentation which
states:

| The resulting path will have no symbolic link, […]



Test script:
---------------
<?php
touch(__DIR__ . '/link.txt');
symlink(__DIR__ . '/link.txt', __DIR__ . '/link1.lnk');
symlink(__DIR__ . '/link1.lnk', __DIR__ . '/link2.lnk');

var_dump(substr(realpath(__DIR__ . '/link2.lnk'), strlen(__DIR__)));
?>

Expected result:
----------------
string(9) "\link.txt"

Actual result:
--------------
string(10) "\link1.lnk"

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History

AllCommentsChangesGit/SVN commitsRelated reports
 [2020-07-07 15:19 UTC] cmb@php.net
-Assigned To: +Assigned To: cmb
 [2020-07-15 16:38 UTC] cmb@php.net
-PHP Version: 7.4.7 +PHP Version: 7.3
 [2020-07-15 16:39 UTC] cmb@php.net
The following pull request has been associated:

Patch Name: Fix #79806: realpath() erroneously resolves link to link
On GitHub:  https://github.com/php/php-src/pull/5861
Patch:      https://github.com/php/php-src/pull/5861.patch
 [2020-07-27 13:12 UTC] cmb@php.net
Automatic comment on behalf of cmbecker69@gmx.de
Revision: http://git.php.net/?p=php-src.git;a=commit;h=d5b59b4303642adac91df2c93969a72bc0f5fa7d
Log: Fix #79806: realpath() erroneously resolves link to link
 [2020-07-27 13:12 UTC] cmb@php.net
-Status: Assigned +Status: Closed
 [2020-07-27 15:54 UTC] cmb@php.net
Automatic comment on behalf of cmbecker69@gmx.de
Revision: http://git.php.net/?p=php-src.git;a=commit;h=1aeff522b8e5ee77b9ae91bab59699db4dfc2c7e
Log: Revert &quot;Fix #79806: realpath() erroneously resolves link to link&quot;
 [2020-07-27 15:54 UTC] cmb@php.net
-Status: Closed +Status: Re-Opened
 [2020-07-28 12:05 UTC] cmb@php.net
-Status: Re-Opened +Status: Closed
 
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