From: [EMAIL PROTECTED]
Operating system: any
PHP version: 5CVS-2006-04-16 (CVS)
PHP Bug Type: Streams related
Bug description: referencing bug with return value for stream_seek
Description:
------------
When using user-space streams via stream_wrapper_register(),
if you return the value of a property of the object from stream_seek(), it
gets mangled.
Sounds like a problem with the way that the retval from
call_user_function_ex() is disposed.
The workaround is to create a temporary value using a trick like this:
function stream_seek($offset, $whence) {
...
$retval = $this->pos + 0;
return $retval;
}
presumably the rest of the user wrapper code has the same flaw.
Reproduce code:
---------------
Abbreviated example; my actual test case is too large.
Valgrind does not indicate any memory errors, so the problem is likely
logical rather than sloppy memory handling.
class MyStream {
var $this->pos = 0;
function stream_tell() {
return $this->pos;
}
function stream_seek($offset, $whence) {
return $this->pos;
}
}
Actual result:
--------------
Problem manifested for me by converting $this->pos to bool(true), which
was then interpreted by the user space wrapper as an invalid return value
from stream_tell(), which simply returns $this->pos.
--
Edit bug report at http://bugs.php.net/?id=37096&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=37096&r=trysnapshot44
Try a CVS snapshot (PHP 5.1):
http://bugs.php.net/fix.php?id=37096&r=trysnapshot51
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=37096&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=37096&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=37096&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=37096&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=37096&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=37096&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=37096&r=support
Expected behavior: http://bugs.php.net/fix.php?id=37096&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=37096&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=37096&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=37096&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=37096&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=37096&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=37096&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=37096&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=37096&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=37096&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=37096&r=mysqlcfg
