#40183 [NEW]: fopen() for appending does not move position until first I/O

From: perrog at gmail dot com Operating system: Mac OS X 10.4 PHP version: 5.2.1RC3 PHP Bug Type: Filesystem function related Bug description: fopen() for appending does not move position until first I/O Description: ------------ Opening a file for appending does not move the file pointer to the end of file before the first I/O operation is performed. That makes ftell() return zero directly after the fopen() call. The workaround, if you need to call ftell() immediately after the fopen(), is to use a no-operation I/O call fseek() that don't do anything. Thus, the file pointer is updated and returns correct position information. Reproduce code: --------------- // create or open a file, and write some stuff to it. $filename = "/path/to/file.txt"; $fp = fopen($filename, "a+"); fwrite($fp, "Sample text"); fclose($fp); // re-open it and check what ftell() returns $fp = fopen($filename, "a+"); echo " pre-fseek: " . ftell($fp) . "\n"; // ftell returns 0 fseek($fp, 0, SEEK_END); echo "post-fseek: " . ftell($fp) . "\n"; // ftell now ok Expected result: ---------------- The snippet should print the file size of the file: pre-fseek: 11 post-fseek: 11 Actual result: -------------- The snippet should print the correct file size only after the first I/O operation: pre-fseek: 0 post-fseek: 11 -- Edit bug report at http://bugs.php.net/?id=40183&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=40183&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=40183&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=40183&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=40183&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=40183&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=40183&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=40183&r=needscript Try newer version: http://bugs.php.net/fix.php?id=40183&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=40183&r=support Expected behavior: http://bugs.php.net/fix.php?id=40183&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=40183&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=40183&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=40183&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=40183&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=40183&r=dst IIS Stability: http://bugs.php.net/fix.php?id=40183&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=40183&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=40183&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=40183&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=40183&r=mysqlcfg