r"""Return the system-wide config dir (full path).

    - Linux, SunOS: /etc/glances
    - *BSD, macOS: /usr/local/etc/glances
    - Windows: %APPDATA%\glances

def system_config_dir():
    r"""Return the system-wide config dir (full path).

    - Linux, SunOS: /etc/glances
    - *BSD, macOS: /usr/local/etc/glances
    - Windows: %APPDATA%\glances
    """
    if LINUX or SUNOS:
        path = '/etc'
    elif BSD or MACOS:
        path = '/usr/local/etc'
    else:
        path = os.environ.get('APPDATA')
    if path is None:
        path = ''
    else:
        path = os.path.join(path, 'glances')

    return path