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Bug #36290 tempnam() creates file on wrong drive
Submitted: 2006-02-05 02:19 UTC Modified: 2008-08-21 20:39 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:0 (0.0%)
Same OS:1 (100.0%)
From: info at silisoftware dot com Assigned:
Status: Closed Package: Filesystem function related
PHP Version: 4.4.2 OS: Windows XP Pro SP2
Private report: No CVE-ID: None
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 [2006-02-05 02:19 UTC] info at silisoftware dot com 
Description:
------------
tempnam() returns a temp filename, and creates the file. However, it creates it on the wrong drive. For example:

$tempname = tempnam('', 'foo');
echo $tempname.'<br>';
echo realpath($tempname).'<br>';

This outputs:

\foo49.tmp
e:\foo49.tmp

Notice the returned filename has no drive letter. The file is created (to prevent race condition) in C:\ but realpath() resolves that to E:\ (the last drive letter of physical harddrives in this system).

For reference:
 getenv('TMP')    == 'C:\WINDOWS\TEMP'
 getenv('TMPDIR') == ''

Reproduce code:
---------------
$tempname = tempnam('', 'foo');
echo $tempname.'<br>';
echo realpath($tempname).'<br>';



Expected result:
----------------
c:\foo49.tmp
c:\foo49.tmp


Actual result:
--------------
\foo49.tmp
e:\foo49.tmp

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 [2006-02-05 10:31 UTC] tony2001@php.net 
Please try using this CVS snapshot:

  http://snaps.php.net/php5.1-latest.tar.gz
 
For Windows:
 
  http://snaps.php.net/win32/php5.1-win32-latest.zip
 [2006-02-13 01:00 UTC] php-bugs at lists dot php dot net 
No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".
 [2006-06-23 11:47 UTC] hanskrentel at yahoo dot de 
I just checked this out on PHP Version 5.1.2 and the behavior for me is the same, so this was not fixed.


reproduced with:
	$tempname = tempnam('', 'foo');
	echo $tempname.'<br>';
	echo realpath($tempname).'<br>';

output in my case:
	\foo5E0.tmp
	d:\foo5E0.tmp

d:\ is not my tempdir

anyway this function behaves inconsisten per default as discribben in the current online documentaion:

>>Creates a file with a unique filename in the specified directory. If the directory does not exist, tempnam() may generate a file in the system's temporary directory, and return the name of that.<<
http://www.php.net/manual/en/function.tempnam.php

so the behavior is correct per definition but useless and i guess not intended.
 [2008-08-21 20:39 UTC] pajoye@php.net 
Fixed in 5.3.x
 
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