Bug #70943 [Com]: fopen() can't open a file if path is 259 characters long

From: Date: Tue, 08 Dec 2015 07:58:32 +0000
Subject: Bug #70943 [Com]: fopen() can't open a file if path is 259 characters long
References: 1  Groups: php.bugs 
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Edit report at https://bugs.php.net/bug.php?id=70943&edit=1

 ID:                 70943
 Comment by:         a dot ehrsam at hotmail dot com
 Reported by:        emanuele at fondani dot it
 Summary:            fopen() can't open a file if path is 259 characters
                     long
 Status:             Open
 Type:               Bug
 Package:            Filesystem function related
 Operating System:   Windows 10
 PHP Version:        5.6.15
 Block user comment: N
 Private report:     N

 New Comment:

I think we have the following limitation of Windows: https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx#maxpath
. This has been a discussion for .NET as well: https://github.com/dotnet/corefx/issues/645


Previous Comments:
------------------------------------------------------------------------
[2015-12-08 06:52:45] yohgaki@php.net

Note: Most file systems support up to 255 chars for file names. Path length are unlimited mostly.

https://en.wikipedia.org/wiki/Comparison_of_file_systems

------------------------------------------------------------------------
[2015-11-30 07:06:45] adrian dot ehrsam at students dot fhnw dot ch

This is an issue of composer as well: https://github.com/composer/composer/issues/4628
. It is the well-known Windows Long path Issue that can be fixed.

------------------------------------------------------------------------
[2015-11-19 18:01:09] emanuele at fondani dot it

Description:
------------
fopen() function cannot access files whose path is more than 258 characters long.


Test script:
---------------
<?php
// Generates a sample file whose path is exactly 259 characters long
$testFile = __DIR__."\\".str_repeat("a", 254 -
strlen(__DIR__)).".dat";
echo "Generating a file with a path length of ".strlen($testFile)."
characters...\r\n";
touch($testFile);

echo "Opening file... ";
if ($fp = fopen($testFile, "r")) {
  fclose($fp);
  echo "OK";
}

Expected result:
----------------
Generating a file with a path length of 259 characters...
Opening file... OK

Actual result:
--------------
Generating a file with a path length of 259 characters...
Opening file... 
Warning:
fopen(S:\Emanuele\Temp\aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.dat):
failed to open stream: Invalid argument in test.php on line 8


------------------------------------------------------------------------



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