#27256 [Opn->Ana]: flock() bug

ID: 27256 Updated by: gschlossnagle@php.net Reported By: dmitry at koteroff dot ru -Status: Open +Status: Analyzed -Bug Type: Filesystem function related +Bug Type: Documentation problem Operating System: Windows NT, 2000, XP, 2003 PHP Version: 4.3.4 New Comment: flock() is mandatory under winNT and it's derivatives. This is a documentation bug. Previous Comments: ------------------------------------------------------------------------ [2004-02-14 18:48:05] dmitry at koteroff dot ru Description: ------------ This code does not work on Windows: <? $f1 = fopen("/tmp/a", "a+b"); flock($f1, LOCK_SH); $f2 = fopen("/tmp/a", "r+b"); fwrite($f2, "test"); ?> It creates zero-length file. On Linux everything is OK. If I delete flock() or call flock($f1, LOCK_UN) just after first flock(), all works correctly. Flock() is ADVISORY lock, but it works as mandatory lock. Bad luck. Reproduce code: --------------- $f1 = fopen("/tmp/a", "a+b"); flock($f1, LOCK_SH); $f2 = fopen("/tmp/a", "r+b"); fwrite($f2, "test"); Expected result: ---------------- Create non-empty file. Actual result: -------------- Creates empty file. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=27256&edit=1