Bug #81223 [Asn->Csd]: flock() only locks first byte of file
| From: | git@php.net | Date: | Tue, 06 Jul 2021 10:04:39 +0000 |
| Subject: | Bug #81223 [Asn->Csd]: flock() only locks first byte of file | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-234810@lists.php.net to get a copy of this message | ||
Edit report at https://bugs.php.net/bug.php?id=81223&edit=1
ID: 81223
Updated by: git@php.net
Reported by: cmb@php.net
Summary: flock() only locks first byte of file
-Status: Assigned
+Status: Closed
Type: Bug
Package: Filesystem function related
Operating System: Windows
PHP Version: 7.4Git-2021-07-05 (Git)
Assigned To: cmb
Block user comment: N
Private report: N
New Comment:
Automatic comment on behalf of cmb69
Revision: https://github.com/php/php-src/commit/520c00a5bffd87a5318c487bf1b778a53e8298d4
Log: Fix #81223: flock() only locks first byte of file
Previous Comments:
------------------------------------------------------------------------
[2021-07-05 14:14:47] cmb@php.net
Description:
------------
On Windows, flock() only locks the first byte of the file, so that
fseeking beyond that first byte allows accessing the file
contents.
Test script:
---------------
<?php
$filename = __FILE__;
$stream1 = fopen($filename, "r");
var_dump(flock($stream1, LOCK_EX));
$stream2 = fopen($filename, "r");
var_dump(fread($stream2, 5));
fseek($stream2, 1);
var_dump(fread($stream2, 4));
?>
Expected result:
----------------
bool(true)
bool(false)
bool(false)
Actual result:
--------------
bool(true)
bool(false)
string(4) "?php"
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=81223&edit=1