#20051 [NEW]: stream_register_wrapper and stream_eof

[leon]

From:             [EMAIL PROTECTED]
Operating system: Linux
PHP version:      4.3.0-pre1
PHP Bug Type:     Reproducible crash
Bug description:  stream_register_wrapper and stream_eof

After fixing the missing semicolon in stream_register_wrapper's example (in
the docs and pasted below), I get infinite loops (and sometimes crashes). 
It seems like this is coming from feof() having problems gettting TRUE
from stream_eof.


<? class VariableStream {
    var $position;
    var $varname;
   
    function stream_open($path, $mode, $options, &$opened_path)
    {
        $url = parse_url($path);
        $this->varname = $url["host"];
        $this->position = 0;
        
        return true;
    }

    function stream_read($count)
    {
        $ret = substr($GLOBALS[$this->varname], $this->position, $count);
        $this->position += strlen($ret);
        return $ret;
    }

    function stream_write($data)
    {
        $left = substr($GLOBALS[$this->varname], 0, $this->position);
        $right = substr($GLOBALS[$this->varname], $this->position +
strlen($data));
        $GLOBALS[$this->varname] = $left . $data . $right;
        $this->position += strlen($data);
        return strlen($data);
    }

    function stream_tell()
    {
        return $this->position;
    }

    function stream_eof()
    {
        return $this->position >= strlen($GLOBALS[$this->varname]);
    }

    function stream_seek($offset, $whence)
    {
        switch($whence) {
            case SEEK_SET:
                if ($offset < strlen($GLOBALS[$this->varname]) && $offset
>= 0) {
                     $this->position = $offset;
                     return true;
                } else {
                     return false;
                }
                break;
                
            case SEEK_CUR:
                if ($offset >= 0) {
                     $this->position += $offset;
                     return true;
                } else {
                     return false;
                }
                break;
                
            case SEEK_END:
                if (strlen($GLOBALS[$this->varname]) + $offset >= 0) {
                     $this->position = strlen($GLOBALS[$this->varname]) +
$offset;
                     return true;
                } else {
                     return false;
                }
                break;
                
            default:
                return false;
        }
    }
}

stream_register_wrapper("var", "VariableStream")
    or die("Failed to register protocol");

$myvar = "";
    
$fp = fopen("var://myvar", "r+");

fwrite($fp, "line1\n");
fwrite($fp, "line2\n");
fwrite($fp, "line3\n");

rewind($fp);
while(!feof($fp)) {
    echo fgets($fp);
}
fclose($fp);
var_dump($myvar);
?>
-- 
Edit bug report at http://bugs.php.net/?id=20051&edit=1
-- 
Try a CVS snapshot:         http://bugs.php.net/fix.php?id=20051&r=trysnapshot
Fixed in CVS:               http://bugs.php.net/fix.php?id=20051&r=fixedcvs
Fixed in release:           http://bugs.php.net/fix.php?id=20051&r=alreadyfixed
Need backtrace:             http://bugs.php.net/fix.php?id=20051&r=needtrace
Try newer version:          http://bugs.php.net/fix.php?id=20051&r=oldversion
Not developer issue:        http://bugs.php.net/fix.php?id=20051&r=support
Expected behavior:          http://bugs.php.net/fix.php?id=20051&r=notwrong
Not enough info:            http://bugs.php.net/fix.php?id=20051&r=notenoughinfo
Submitted twice:            http://bugs.php.net/fix.php?id=20051&r=submittedtwice
register_globals:           http://bugs.php.net/fix.php?id=20051&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=20051&r=php3
Daylight Savings:           http://bugs.php.net/fix.php?id=20051&r=dst
IIS Stability:              http://bugs.php.net/fix.php?id=20051&r=isapi