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includes/discovery/storage/freenas-dataset.inc.php (2 issues)

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1 
<?php
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$datasetTable_array = snmpwalk_cache_oid($device, 'datasetTable', null, 'FREENAS-MIB');

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
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Are you sure the assignment to $datasetTable_array is correct as snmpwalk_cache_oid($devi...', null, 'FREENAS-MIB') seems to always return null.
                                                                                                                                                    

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
This check looks for function or method calls that always return null and whose
return value is assigned to a variable.


class A
{
    function getObject()
    {
        return null;
    }

}

$a = new A();
$object = $a->getObject();





The method getObject() can return nothing but null, so it makes no sense
to assign that value to a variable.


The reason is most likely that a function or method is imcomplete or has been
reduced for debug purposes.


                        

                                                    

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$sql = "SELECT `storage_descr` FROM `storage` WHERE `device_id`  = '" . $device['device_id'] . "' AND `storage_type` != 'dataset'";

            


            
                                                                        
                            
            
                                    
            
            

                
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$tmp_storage = dbFetchColumn($sql);

            


            
                                                                        
                            
            
                                    
            
            

                
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if (is_array($datasetTable_array)) {

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
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        introduced 
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The condition is_array($datasetTable_array) is always false.
                                                                                                                                                                                                        

                    
                                                    

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    foreach ($datasetTable_array as $index => $dataset) {

            


            
                                                                        
                            
            
                                    
            
            

                
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        if (isset($dataset['datasetDescr'])) {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            if (! in_array($dataset['datasetDescr'], $tmp_storage)) {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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                $dataset['datasetIndex'] = $index;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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                $dataset['datasetTotal'] = $dataset['datasetSize'] * $dataset['datasetAllocationUnits'];

            


            
                                                                                                            
                            
            
                                    
            
            

                
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                $dataset['datasetAvail'] = ($dataset['datasetAvailable'] * $dataset['datasetAllocationUnits']);

            


            
                                                                                                            
                            
            
                                    
            
            

                
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                $dataset['datasetUsed'] = $dataset['datasetTotal'] - $dataset['datasetAvail'];

            


            
                                                                                                            
                            
            
                                    
            
            

                
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                discover_storage($valid_storage, $device, $dataset['datasetIndex'], 'dataset', 'freenas-dataset', $dataset['datasetDescr'], $dataset['datasetTotal'], $dataset['datasetAllocationUnits'], $dataset['datasetUsed']);

            


            
                                                                                                            
                            
            
                                    
            
            

                
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            }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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}

            


            
                                                        
            
                                    
            
            

                
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