    protected String getExecutionPreamble()
    {
        if ( getWorkingDirectoryAsString() == null )
        {
            return null;
        }

        String dir = getWorkingDirectoryAsString();
        StringBuilder sb = new StringBuilder();
        sb.append( "cd " );

        sb.append( unifyQuotes( dir ) );
        sb.append( " && " );

        return sb.toString();
    }
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.