    private void verifyShellState()
    {
        if ( shell.getWorkingDirectory() == null )
        {
            shell.setWorkingDirectory( workingDir );
        }

        if ( shell.getExecutable() == null )
        {
            shell.setExecutable( executable );
        }
    }
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.