From: kylewong at southa dot com
Operating system: linux kernel 2.6.10
PHP version: 4.3.11
PHP Bug Type: *Directory/Filesystem functions
Bug description: copy() sometime fail with permission error
Description:
------------
I have a script which unzip an uploaded ZIP file (contains image files)
into a temp directory, "/dev/shm/tmp" (tmpfs for speed, I tried to use
/tmp but still got the problem), which is owned by "nobody" and 777 in
permission.
The script will then process the unzipped image files, one by one, by
calling an resize_image() function.
The resize_image() function will try to resize the image, then copy the
resized image to somewhere else.
The script works most of the time, but sometime, it failed with something
like:
[04-Jun-2005 17:19:47] PHP Warning: copy(/dev/shm/tmp/00800040.jpg):
failed to open stream: Permission denied in /home/platform/fs_unix.php on
line 15
[04-Jun-2005 17:19:48] PHP Warning: copy(/dev/shm/tmp/00800041.jpg):
failed to open stream: Permission denied in /home/platform/fs_unix.php on
line 15
[04-Jun-2005 17:19:49] PHP Warning: copy(/dev/shm/tmp/00800042.jpg):
failed to open stream: Permission denied in /home/platform/fs_unix.php on
line 15
[04-Jun-2005 17:19:50] PHP Warning: copy(/dev/shm/tmp/00800043.jpg):
failed to open stream: Permission denied in /home/platform/fs_unix.php on
line 15
.....
when the error happens, all of the files insize the same zip file will
result in same error.
I don't really know what's wrong since the scipt sometime works, sometime
doesn't
Reproduce code:
---------------
util.php, $src will == $dest, $target is target size
function resize_image($src, $dest, $target) {
if (!strcmp($src,$dest)) {
$useTemp = true;
$out = "$dest.tmp";
}
else {
$out = $dest;
$useTemp = false;
}
/* resize xxx.jpg to xxx.jpg.tmp at the same directory */
$err = exec_wrapper("convert -quality 85 -size ${target}x${target} $src
$out");
if (file_exists("$out") && filesize("$out") > 0) {
if ($useTemp) {
//// copy back xxx.jpg.tmp to xxx.jpg ////
all errors happen here ---> $ret = copy($out, $dest);
unlink($out);
if (!$ret){
return 0;
}
return 1;
}
} else {
return 0;
}
}
Expected result:
----------------
fs_copy() should not be failed with "permission denied" error
Actual result:
--------------
something failed with permission error
--
Edit bug report at http://bugs.php.net/?id=33241&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=33241&r=trysnapshot4
Try a CVS snapshot (php5.0):
http://bugs.php.net/fix.php?id=33241&r=trysnapshot50
Try a CVS snapshot (php5.1):
http://bugs.php.net/fix.php?id=33241&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=33241&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=33241&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=33241&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=33241&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=33241&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=33241&r=support
Expected behavior: http://bugs.php.net/fix.php?id=33241&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=33241&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=33241&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=33241&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=33241&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=33241&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=33241&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=33241&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=33241&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=33241&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=33241&r=mysqlcfg
