From: linke at paralight dot ru
Operating system: FreeBSD4.3(ufs) / WinXPpro(ntfs)
PHP version: 4.3.4
PHP Bug Type: Filesystem function related
Bug description: filesize() during concurrent file read/write
Description:
------------
When opened file grows during script run, filesize still report old size.
Cached filesize? But clearstatcache() before filesize() can't help.
On FreeBSD 4.3-STABLE there is no this unexpected behaviour - it's all ok
without any clearstatcache();
I get my "bbbbbb" on WindowsXP/ntfs when when I use fread($fd_2, 1024)
instead of fread($fd_2, filesize('test')).
In production environment i'll get this behavior during concurrent file
read/write from two simultaneously running script. I think at leas this
behavior must be same at all platforms, so it's a bug.
Reproduce code:
---------------
<?
$fd=fopen('test', 'wb');
fwrite($fd, 'aa');
fclose($fd);
$fd_1=fopen('test', 'rb+');
$fd_2=fopen('test', 'rb+');
fwrite($fd_1, 'bbbbbb');
echo fread($fd_2, filesize('test'));
fclose($fd_1);
fclose($fd_2);
?>
Expected result:
----------------
bbbbbb
Actual result:
--------------
FreeBSD 4.3-STABLE (ufs):
bbbbbb
Windows XP pro (ntfs):
bb
--
Edit bug report at http://bugs.php.net/?id=27029&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=27029&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=27029&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=27029&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=27029&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=27029&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=27029&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=27029&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=27029&r=support
Expected behavior: http://bugs.php.net/fix.php?id=27029&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=27029&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=27029&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=27029&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=27029&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=27029&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=27029&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=27029&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=27029&r=float
