Bug #66497 [NEW]: symlink improperly creates recursive link on existing symlink without a target

From: mattsch at gmail dot com Operating system: Gentoo Linux PHP version: 5.5.8 Package: Filesystem function related Bug Type: Bug Bug description:symlink improperly creates recursive link on existing symlink without a target Description: ------------ symlink improperly creates a recursive link on existing symlink without a target. This appears to be a regression since php 5.2 which was broken in php 5.3 and all subsequent versions. In php 5.2, calling symlink on an existing symlink always failed regardless whether the target existed. Test script: --------------- <?php /* Make symlink create a symbolic link that does not link to anything (link does not exist) */ symlink('43', '0'); // Result: 0 -> 43 // second call to the same thing symlink('43', '0'); // Result: 43 -> 43 /* third call will fail with a warning: PHP Warning: symlink(): No such file or directory in test.php on line 2 */ symlink('43', '0'); Expected result: ---------------- symlink should fail and emit a warning after the second call to a non-existing link and not create a recursive link on the target. Actual result: -------------- symlink fails on the third call to create a symlink that already exists after creating a recursive symlink to the target. -- Edit bug report at https://bugs.php.net/bug.php?id=66497&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=66497&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=66497&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=66497&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=66497&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=66497&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=66497&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=66497&r=needscript Try newer version: https://bugs.php.net/fix.php?id=66497&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=66497&r=support Expected behavior: https://bugs.php.net/fix.php?id=66497&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=66497&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=66497&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=66497&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=66497&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=66497&r=dst IIS Stability: https://bugs.php.net/fix.php?id=66497&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=66497&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=66497&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=66497&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=66497&r=mysqlcfg