#30936 [NEW]: fread from userspace stream wrapper only reads 8192 bytes
From: jason at e7x dot com
Operating system: Windows 2000/Linux
PHP version: 4.3.9
PHP Bug Type: Filesystem function related
Bug description: fread from userspace stream wrapper only reads 8192 bytes
Description:
------------
Attempting to fread() more than 8192 bytes from a userspace stream wrapper
will only read and return the first 8192 bytes, putting an echo statement
in stream_read() shows that it is only being called once.
Reading <= 8192 bytes at a time works as expected, as does fgets($f,
15000) (reads 14999 bytes).
This bug is only present in 4.3.9 and 4.3.10RC1, 4.3.8 works fine.
Reproduce code:
---------------
<?php
// using example class from the manual:
// http://uk.php.net/stream_wrapper_register
$x = str_repeat('x', 15000);
$f = fopen('var://x', 'r');
$len = strlen(fread($f, 15000));
fclose($f);
echo "Read $len bytes";
?>
Expected result:
----------------
Read 15000 bytes
Actual result:
--------------
Read 8192 bytes
--
Edit bug report at http://bugs.php.net/?id=30936&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=30936&r=trysnapshot4
Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=30936&r=trysnapshot50
Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=30936&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=30936&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=30936&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=30936&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=30936&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=30936&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=30936&r=support
Expected behavior: http://bugs.php.net/fix.php?id=30936&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=30936&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=30936&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=30936&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=30936&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=30936&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=30936&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=30936&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=30936&r=float
MySQL Configuration Error: http://bugs.php.net/fix.php?id=30936&r=mysqlcfg
Thread (7 messages)
- jason at e7x dot com