#39961 [NEW]: fread() trouble with stream wrappers
From: php_nospam at ramihyn dot sytes dot net
Operating system: Win32,Linux x86
PHP version: 5.2.0
PHP Bug Type: Streams related
Bug description: fread() trouble with stream wrappers
Description:
------------
PHP's fread() function reads only the first 8192 bytes of any file
accessed via a stream wrapper, even if the file is bigger and the
wrappers' stream_eof() method returns false to signal it is NOT the end of
the file.
I expect fread() to repeat calling the wrappers' stream_read() and
stream_eof() methods until stream_eof() signals the end of file or
stream_read() returns less than the requested 8192 bytes.
I encountered this behaviour with PHP 5.2.0 on Win32 and Linux x86.
Reproduce code:
---------------
<?
class PHP_Bug {
private $data; private $pos;
function initializeStream()
{
$this->data = str_repeat("-",16399);
$this->pos = 0;
}
function stream_open($fn)
{
$this->initializeStream();
return true;
}
function stream_stat()
{
$this->initializeStream();
return
array(0,0,0100444,"mode"=>0100444,"size"=>strlen($this->data));
}
function url_stat()
{
return $this->stream_stat();
}
function stream_read($cnt)
{
echo __METHOD__."(".$cnt.")\n";
$ret = substr($this->data,$this->pos,$cnt);
$this->pos += strlen($ret);
return $ret;
}
function stream_eof()
{
$ret = ($this->pos >= strlen($this->data));
echo __METHOD__."=".(($ret)?"true":"false")."\n";
return $ret;
}
}
stream_wrapper_register("bug","PHP_Bug");
$fs = filesize("bug://");
$fp = fopen("bug://","r");
$ret = fread($fp,$fs);
fclose($fp);
echo "size is ".strlen($ret)."\n";
?>
Expected result:
----------------
PHP_Bug::stream_read(8192)
PHP_Bug::stream_eof=false
PHP_Bug::stream_read(8192)
PHP_Bug::stream_eof=false
PHP_Bug::stream_read(8192)
PHP_Bug::stream_eof=true
size is 16399
Actual result:
--------------
PHP_Bug::stream_read(8192)
PHP_Bug::stream_eof=false
size is 8192
--
Edit bug report at http://bugs.php.net/?id=39961&edit=1
--
Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=39961&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=39961&r=trysnapshot52
Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=39961&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=39961&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=39961&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=39961&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=39961&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=39961&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=39961&r=support
Expected behavior: http://bugs.php.net/fix.php?id=39961&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=39961&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=39961&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=39961&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=39961&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=39961&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=39961&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=39961&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=39961&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=39961&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=39961&r=mysqlcfg
Thread (5 messages)
- php_nospam at ramihyn dot sytes dot net