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Bug #42381 Double-flock()ing a file crashes
Submitted: 2007-08-22 15:13 UTC Modified: 2007-08-23 01:00 UTC
From: phpbugs dot 20 dot zsh at spamgourmet dot com Assigned:
Status: Not a bug Package: Reproducible crash
PHP Version: 5.2.3 OS: Windows XP
Private report: No CVE-ID: None
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 [2007-08-22 15:13 UTC] phpbugs dot 20 dot zsh at spamgourmet dot com 
Description:
------------
Double-flock()ing a file with different handles crashes. 

Reproduce code:
---------------
<?php
$fp = fopen('generic-textfile.txt', 'w');
flock($fp, LOCK_EX);
$fp2 = fopen('generic-textfile.txt', 'w');
flock($fp2, LOCK_EX);
echo 'Dun!';
?>

Expected result:
----------------
Dun!

Actual result:
--------------
Nothing

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 [2007-08-23 01:00 UTC] stas@php.net 
Can't reproduce ceashing. What you probably seeing is php waiting on flock until it's killed by the timeout thread.
 
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