import os

import logging
logger = logging.getLogger(__name__)


def eject_device(device):
    """Eject the given device.

    :param device: optical disk drive.
    :type device:
    """
    logger.debug("ejecting device %s", device)
    os.system('eject %s' % device)


def load_device(device):
    """Load the given device.

    :param device: optical disk drive.
    :type device:
    """
    logger.debug("loading (eject -t) device %s", device)
    os.system('eject -t %s' % device)


def unmount_device(device):
    """Unmount the given device if it is mounted.

    Data tracks are usually automounted.

    If the given device is a symlink, the target will be checked.

    :param device: optical disk drive.
    :type device:
    """
    device = os.path.realpath(device)
    logger.debug('possibly unmount real path %r' % device)
    proc = open('/proc/mounts').read()
    if device in proc:
        print 'Device %s is mounted, unmounting' % device
        os.system('umount %s' % device)