#32160 [NEW]: Copying a file into itself leads to data loss

From: chernyshevsky at hotmail dot com Operating system: Win32/Linux PHP version: 4.3.10 PHP Bug Type: Filesystem function related Bug description: Copying a file into itself leads to data loss Description: ------------ Copying a file into itself causes the source file to be truncate to 0 bytes. copy("test", "test"); // test.txt -> 0 You can't avoid this problem just by comparing the filenames, since one could be a symlink pointing to the other. The following would destroy test1 if test2 is a link to test1: copy("test1", "test2"); Reproduce code: --------------- copy("test", "test"); Expected result: ---------------- Nothing happens or a file open error. Actual result: -------------- Contents in source file is lost. -- Edit bug report at http://bugs.php.net/?id=32160&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=32160&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=32160&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=32160&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=32160&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=32160&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=32160&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=32160&r=needscript Try newer version: http://bugs.php.net/fix.php?id=32160&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=32160&r=support Expected behavior: http://bugs.php.net/fix.php?id=32160&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=32160&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=32160&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=32160&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=32160&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=32160&r=dst IIS Stability: http://bugs.php.net/fix.php?id=32160&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=32160&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=32160&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=32160&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=32160&r=mysqlcfg