From:             onzi at ustrem dot org
Operating system: AIX 6.1
PHP version:      5.2.11
PHP Bug Type:     Zlib Related
Bug description:  gzseek don't working

Description:
------------
OSlevel 6100-02-03-0909
xlc 10.1.0.0

I run ./sapi/cli/php ext/zlib/tests/gzseek_basic.phpt

gzopen opens file but gzseek seems to not working.



Reproduce code:
---------------
<?php
$f = dirname(__FILE__)."/004.txt.gz";
$h = gzopen($f, 'r');
var_dump($h);

echo "move to the 50th byte\n";
var_dump(gzseek($h,50));
echo "tell=".gztell($h)."\n";
//read the next 10
var_dump(gzread($h, 10));

echo "\nmove forward to the 100th byte\n";
var_dump(gzseek( $h, 100 ) );
echo "tell=".gztell($h)."\n";
//read the next 10
var_dump(gzread($h, 10));

echo "\nmove backward to the 20th byte\n";
var_dump(gzseek( $h, 20 ) );
echo "tell=".gztell($h)."\n";
//read the next 10
var_dump(gzread($h, 10));
gzclose($h);
?>


Expected result:
----------------
resource(5) of type (stream)
move to the 50th byte
int(-1)
tell=
string(0) ""

move forward to the 100th byte
int(-1)
tell=
string(0) ""

move backward to the 20th byte
int(-1)
tell=
string(0) ""


Actual result:
--------------
move to the 50th byte
int(0)
tell=50
string(10) " high abov"

move forward to the 100th byte
int(0)
tell=100
string(10) "Destiny wh"

move backward to the 20th byte
int(0)
tell=20
string(10) "hrough fee"


-- 
Edit bug report at http://bugs.php.net/?id=50001&edit=1
-- 
Try a snapshot (PHP 5.2):            
http://bugs.php.net/fix.php?id=50001&r=trysnapshot52
Try a snapshot (PHP 5.3):            
http://bugs.php.net/fix.php?id=50001&r=trysnapshot53
Try a snapshot (PHP 6.0):            
http://bugs.php.net/fix.php?id=50001&r=trysnapshot60
Fixed in SVN:                        
http://bugs.php.net/fix.php?id=50001&r=fixed
Fixed in SVN and need be documented: 
http://bugs.php.net/fix.php?id=50001&r=needdocs
Fixed in release:                    
http://bugs.php.net/fix.php?id=50001&r=alreadyfixed
Need backtrace:                      
http://bugs.php.net/fix.php?id=50001&r=needtrace
Need Reproduce Script:               
http://bugs.php.net/fix.php?id=50001&r=needscript
Try newer version:                   
http://bugs.php.net/fix.php?id=50001&r=oldversion
Not developer issue:                 
http://bugs.php.net/fix.php?id=50001&r=support
Expected behavior:                   
http://bugs.php.net/fix.php?id=50001&r=notwrong
Not enough info:                     
http://bugs.php.net/fix.php?id=50001&r=notenoughinfo
Submitted twice:                     
http://bugs.php.net/fix.php?id=50001&r=submittedtwice
register_globals:                    
http://bugs.php.net/fix.php?id=50001&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=50001&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=50001&r=dst
IIS Stability:                       
http://bugs.php.net/fix.php?id=50001&r=isapi
Install GNU Sed:                     
http://bugs.php.net/fix.php?id=50001&r=gnused
Floating point limitations:          
http://bugs.php.net/fix.php?id=50001&r=float
No Zend Extensions:                  
http://bugs.php.net/fix.php?id=50001&r=nozend
MySQL Configuration Error:           
http://bugs.php.net/fix.php?id=50001&r=mysqlcfg

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