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3

u1�Wɭ�@sZdZddlmZddlmZddlmZddlmZddlZddlZddlm	Z	ddlm
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    pyudev.device._device
    =====================

    Device class implementation of :mod:`pyudev`.

    .. moduleauthor::  Sebastian Wiesner  <lunaryorn@gmail.com>
�)�absolute_import)�division)�print_function)�unicode_literalsN)�	Container)�Iterable)�Mapping)�	timedelta)�DeviceNotFoundAtPathError)�DeviceNotFoundByFileError)�#DeviceNotFoundByInterfaceIndexError)�!DeviceNotFoundByKernelDeviceError)�DeviceNotFoundByNameError)�DeviceNotFoundByNumberError)� DeviceNotFoundInEnvironmentError)�ensure_byte_string)�ensure_unicode_string)�get_device_type)�string_to_bool)�udev_list_iteratec@s|eZdZdZedd��Zedd��Zedd��Zedd	��Zed
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    Class for constructing :class:`Device` objects from various kinds of data.
    cCs0|j|j�s$tjj|j|jtj��}|j||�S)a�
        Create a device from a device ``path``.  The ``path`` may or may not
        start with the ``sysfs`` mount point:

        >>> from pyudev import Context, Device
        >>> context = Context()
        >>> Devices.from_path(context, '/devices/platform')
        Device(u'/sys/devices/platform')
        >>> Devices.from_path(context, '/sys/devices/platform')
        Device(u'/sys/devices/platform')

        ``context`` is the :class:`Context` in which to search the device.
        ``path`` is a device path as unicode or byte string.

        Return a :class:`Device` object for the device.  Raise
        :exc:`DeviceNotFoundAtPathError`, if no device was found for ``path``.

        .. versionadded:: 0.18
        )�
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        Create a new device from a given ``sys_path``:

        >>> from pyudev import Context, Device
        >>> context = Context()
        >>> Devices.from_sys_path(context, '/sys/devices/platform')
        Device(u'/sys/devices/platform')

        ``context`` is the :class:`Context` in which to search the device.
        ``sys_path`` is a unicode or byte string containing the path of the
        device inside ``sysfs`` with the mount point included.

        Return a :class:`Device` object for the device.  Raise
        :exc:`DeviceNotFoundAtPathError`, if no device was found for
        ``sys_path``.

        .. versionadded:: 0.18
        )�_libudevZudev_device_new_from_syspathrr
�Device)rr r�devicer!r!r"rUs
zDevices.from_sys_pathcCs<|jdd�}|jj|t|�t|��}|s2t||��t||�S)a.
        Create a new device from a given ``subsystem`` and a given
        ``sys_name``:

        >>> from pyudev import Context, Device
        >>> context = Context()
        >>> sda = Devices.from_name(context, 'block', 'sda')
        >>> sda
        Device(u'/sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda')
        >>> sda == Devices.from_path(context, '/block/sda')

        ``context`` is the :class:`Context` in which to search the device.
        ``subsystem`` and ``sys_name`` are byte or unicode strings, which
        denote the subsystem and the name of the device to create.

        Return a :class:`Device` object for the device.  Raise
        :exc:`DeviceNotFoundByNameError`, if no device was found with the given
        name.

        .. versionadded:: 0.18
        �/�!)�replacer$Z&udev_device_new_from_subsystem_sysnamerrr%)rr �	subsystem�sys_namer&r!r!r"�	from_nameos

zDevices.from_namecCs0|jj|t|d�|�}|s&t||��t||�S)a�
        Create a new device from a device ``number`` with the given device
        ``type``:

        >>> import os
        >>> from pyudev import Context, Device
        >>> ctx = Context()
        >>> major, minor = 8, 0
        >>> device = Devices.from_device_number(context, 'block',
        ...     os.makedev(major, minor))
        >>> device
        Device(u'/sys/devices/pci0000:00/0000:00:11.0/host0/target0:0:0/0:0:0:0/block/sda')
        >>> os.major(device.device_number), os.minor(device.device_number)
        (8, 0)

        Use :func:`os.makedev` to construct a device number from a major and a
        minor device number, as shown in the example above.

        .. warning::

           Device numbers are not unique across different device types.
           Passing a correct number with a wrong type may silently yield a
           wrong device object, so make sure to pass the correct device type.

        ``context`` is the :class:`Context`, in which to search the device.
        ``type`` is either ``'char'`` or ``'block'``, according to whether the
        device is a character or block device.  ``number`` is the device number
        as integer.

        Return a :class:`Device` object for the device with the given device
        ``number``.  Raise :exc:`DeviceNotFoundByNumberError`, if no device was
        found with the given device type and number.

        .. versionadded:: 0.18
        r)r$Zudev_device_new_from_devnumrrr%)rr �typ�numberr&r!r!r"�from_device_number�s
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        Create a new device from the given device file:

        >>> from pyudev import Context, Device
        >>> context = Context()
        >>> device = Devices.from_device_file(context, '/dev/sda')
        >>> device
        Device(u'/sys/devices/pci0000:00/0000:00:0d.0/host2/target2:0:0/2:0:0:0/block/sda')
        >>> device.device_node
        u'/dev/sda'

        .. warning::

           Though the example seems to suggest that ``device.device_node ==
           filename`` holds with ``device = Devices.from_device_file(context,
           filename)``, this is only true in a majority of cases.  There *can*
           be devices, for which this relation is actually false!  Thus, do
           *not* expect :attr:`~Device.device_node` to be equal to the given
           ``filename`` for the returned :class:`Device`.  Especially, use
           :attr:`~Device.device_node` if you need the device file of a
           :class:`Device` created with this method afterwards.

        ``context`` is the :class:`Context` in which to search the device.
        ``filename`` is a string containing the path of a device file.

        Return a :class:`Device` representing the given device file.  Raise
        :exc:`DeviceNotFoundByFileError` if ``filename`` is no device file
        at all or if ``filename`` does not exist or if its metadata was
        inaccessible.

        .. versionadded:: 0.18
        N)rr�stat�st_rdev�EnvironmentError�
ValueErrorrr/)rr �filename�device_type�
device_number�errr!r!r"�from_device_file�s"zDevices.from_device_filecs<|jdd�}t�fdd�|D�d�}|dk	r0|St���dS)a?
        Locate a device based on the interface index.

        :param `Context` context: the libudev context
        :param int ifindex: the interface index
        :returns: the device corresponding to the interface index
        :rtype: `Device`

        This method is only appropriate for network devices.
        Znet)r*c3s"|]}|jjd��kr|VqdS)�ifindexN)�
attributes�get)�.0�d)r9r!r"�	<genexpr>�sz/Devices.from_interface_index.<locals>.<genexpr>N)�list_devices�nextr)rr r9Znetwork_devicesZdevr!)r9r"�from_interface_index�szDevices.from_interface_indexcCs�|d}|dd�}|dkrltjd�}|j|�}|rbtjt|jd��t|jd���}|j|||�St|��nT|d	kr�|j	||�S|d
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        Locate a device based on the kernel device.

        :param `Context` context: the libudev context
        :param str kernel_device: the kernel device
        :returns: the device corresponding to ``kernel_device``
        :rtype: `Device`
        r�N�b�cz^(?P<major>\d+):(?P<minor>\d+)$�major�minor�n�+�:)rCrD)�re�compile�matchr�makedev�int�groupr/r
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        Create a new device from the process environment (as in
        :data:`os.environ`).

        This only works reliable, if the current process is called from an
        udev rule, and is usually used for tools executed from ``IMPORT=``
        rules.  Use this method to create device objects in Python scripts
        called from udev rules.

        ``context`` is the library :class:`Context`.

        Return a :class:`Device` object constructed from the environment.
        Raise :exc:`DeviceNotFoundInEnvironmentError`, if no device could be
        created from the environment.

        .. udevversion:: 152

        .. versionadded:: 0.18
        )r$Z udev_device_new_from_environmentrr%)rr r&r!r!r"�from_environmentszDevices.from_environmentcCs|j|j|j|j|jgS)z�
        Return methods that obtain a :class:`Device` from a variety of
        different data.

        :return: a list of from_* methods.
        :rtype: list of class methods

        .. versionadded:: 0.18
        )r8r/r,r#r)rr!r!r"�METHODS9s
zDevices.METHODSN)�__name__�
__module__�__qualname__�__doc__�classmethodr#rr,r/r8rArSrTrUr!r!r!r"r7s++#rc@s�eZdZdZedd��Zedd��Zedd��Zedd	��Zed
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��Z
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edd��Zedd��Zedd��ZdYdd�Zdd�Zedd ��Zed!d"��Zed#d$��Zed%d&��Zed'd(��Zed)d*��Zed+d,��Zed-d.��Zed/d0��Zed1d2��Zed3d4��Zed5d6��Zed7d8��Z ed9d:��Z!ed;d<��Z"ed=d>��Z#ed?d@��Z$dAdB�Z%dCdD�Z&dEdF�Z'dGdH�Z(dIdJ�Z)dKdL�Z*dMdN�Z+dOdP�Z,dQdR�Z-dSdT�Z.dUdV�Z/dWdX�Z0dS)Zr%a�
    A single device with attached attributes and properties.

    This class subclasses the ``Mapping`` ABC, providing a read-only
    dictionary mapping property names to the corresponding values.
    Therefore all well-known dicitionary methods and operators
    (e.g. ``.keys()``, ``.items()``, ``in``) are available to access device
    properties.

    Aside of the properties, a device also has a set of udev-specific
    attributes like the path inside ``sysfs``.

    :class:`Device` objects compare equal and unequal to other devices and
    to strings (based on :attr:`device_path`).  However, there is no
    ordering on :class:`Device` objects, and the corresponding operators
    ``>``, ``<``, ``<=`` and ``>=`` raise :exc:`~exceptions.TypeError`.

    .. warning::

       **Never** use object identity (``is`` operator) to compare
       :class:`Device` objects.  :mod:`pyudev` may create multiple
       :class:`Device` objects for the same device.  Instead compare
       devices by value using ``==`` or ``!=``.

    :class:`Device` objects are hashable and can therefore be used as keys
    in dictionaries and sets.

    They can also be given directly as ``udev_device *`` to functions wrapped
    through :mod:`ctypes`.
    cCs$ddl}|jdtdd�tj||�S)zw
        .. versionadded:: 0.4
        .. deprecated:: 0.18
           Use :class:`Devices.from_path` instead.
        rNz>Will be removed in 1.0. Use equivalent Devices method instead.�)�
stacklevel)�warnings�warn�DeprecationWarningrr#)rr rr]r!r!r"r#nszDevice.from_pathcCs$ddl}|jdtdd�tj||�S)a|
        .. versionchanged:: 0.4
           Raise :exc:`NoSuchDeviceError` instead of returning ``None``, if
           no device was found for ``sys_path``.
        .. versionchanged:: 0.5
           Raise :exc:`DeviceNotFoundAtPathError` instead of
           :exc:`NoSuchDeviceError`.
        .. deprecated:: 0.18
           Use :class:`Devices.from_sys_path` instead.
        rNz>Will be removed in 1.0. Use equivalent Devices method instead.r[)r\)r]r^r_rr)rr rr]r!r!r"r}szDevice.from_sys_pathcCs&ddl}|jdtdd�tj|||�S)zw
        .. versionadded:: 0.5
        .. deprecated:: 0.18
           Use :class:`Devices.from_name` instead.
        rNz>Will be removed in 1.0. Use equivalent Devices method instead.r[)r\)r]r^r_rr,)rr r*r+r]r!r!r"r,�szDevice.from_namecCs&ddl}|jdtdd�tj|||�S)z�
        .. versionadded:: 0.11
        .. deprecated:: 0.18
           Use :class:`Devices.from_device_number` instead.
        rNz>Will be removed in 1.0. Use equivalent Devices method instead.r[)r\)r]r^r_rr/)rr r-r.r]r!r!r"r/�szDevice.from_device_numbercCs$ddl}|jdtdd�tj||�S)z
        .. versionadded:: 0.15
        .. deprecated:: 0.18
           Use :class:`Devices.from_device_file` instead.
        rNz>Will be removed in 1.0. Use equivalent Devices method instead.r[)r\)r]r^r_rr8)rr r4r]r!r!r"r8�szDevice.from_device_filecCs"ddl}|jdtdd�tj|�S)z~
        .. versionadded:: 0.6
        .. deprecated:: 0.18
           Use :class:`Devices.from_environment` instead.
        rNz>Will be removed in 1.0. Use equivalent Devices method instead.r[)r\)r]r^r_rrT)rr r]r!r!r"rT�szDevice.from_environmentcCs||_||_|j|_dS)N)r Z_as_parameter_r$)�selfr Z_devicer!r!r"�__init__�szDevice.__init__cCs|jj|�dS)N)r$Zudev_device_unref)r`r!r!r"�__del__�szDevice.__del__cCs
dj|�S)NzDevice({0.sys_path!r}))�format)r`r!r!r"�__repr__�szDevice.__repr__cCs(|jj|�}|sdSt|j|jj|��S)z_
        The parent :class:`Device` or ``None``, if there is no parent
        device.
        N)r$Zudev_device_get_parentr%r �udev_device_ref)r`�parentr!r!r"rf�sz
Device.parentccs,x&|jj�j|�D]}||kr|VqWdS)a�
        Yield all direct children of this device.

        .. note::

           In udev, parent-child relationships are generally ambiguous, i.e.
           a parent can have multiple children, *and* a child can have multiple
           parents. Hence, `child.parent == parent` does generally *not* hold
           for all `child` objects in `parent.children`. In other words,
           the :attr:`parent` of a device in this property can be different
           from this device!

        .. note::

           As the underlying library does not provide any means to directly
           query the children of a device, this property performs a linear
           search through all devices.

        Return an iterable yielding a :class:`Device` object for each direct
        child of this device.

        .. udevversion:: 172

        .. versionchanged:: 0.13
           Requires udev version 172 now.
        N)r r?Zmatch_parent)r`r&r!r!r"�children�szDevice.childrenccs$|j}x|dk	r|V|j}qWdS)z�
        Yield all ancestors of this device from bottom to top.

        Return an iterator yielding a :class:`Device` object for each
        ancestor of this device from bottom to top.

        .. versionadded:: 0.16
        N)rf)r`rfr!r!r"�	ancestorss

zDevice.ancestorsNcCsDt|�}|dk	rt|�}|jj|||�}|s0dSt|j|jj|��S)a�
        Find the parent device with the given ``subsystem`` and
        ``device_type``.

        ``subsystem`` is a byte or unicode string containing the name of the
        subsystem, in which to search for the parent.  ``device_type`` is a
        byte or unicode string holding the expected device type of the parent.
        It can be ``None`` (the default), which means, that no specific device
        type is expected.

        Return a parent :class:`Device` within the given ``subsystem`` and, if
        ``device_type`` is not ``None``, with the given ``device_type``, or
        ``None``, if this device has no parent device matching these
        constraints.

        .. versionadded:: 0.9
        N)rr$Z-udev_device_get_parent_with_subsystem_devtyper%r re)r`r*r5rfr!r!r"�find_parents
zDevice.find_parentcCsddl}|jdtdd�|jS)a~
        Traverse all parent devices of this device from bottom to top.

        Return an iterable yielding all parent devices as :class:`Device`
        objects, *not* including the current device.  The last yielded
        :class:`Device` is the top of the device hierarchy.

        .. deprecated:: 0.16
           Will be removed in 1.0. Use :attr:`ancestors` instead.
        rNz5Will be removed in 1.0. Use Device.ancestors instead.r[)r\)r]r^r_rh)r`r]r!r!r"�traverse0szDevice.traversecCst|jj|��S)zz
        Absolute path of this device in ``sysfs`` including the ``sysfs``
        mount point as unicode string.
        )rr$Zudev_device_get_syspath)r`r!r!r"rCszDevice.sys_pathcCst|jj|��S)a
        Kernel device path as unicode string.  This path uniquely identifies
        a single device.

        Unlike :attr:`sys_path`, this path does not contain the ``sysfs``
        mount point.  However, the path is absolute and starts with a slash
        ``'/'``.
        )rr$Zudev_device_get_devpath)r`r!r!r"�device_pathLs
zDevice.device_pathcCs |jj|�}|dkrdSt|�S)z�
        Name of the subsystem this device is part of as unicode string.

        :returns: name of subsystem if found, else None
        :rtype: unicode string or NoneType
        N)r$Zudev_device_get_subsystemr)r`Zsubsysr!r!r"r*YszDevice.subsystemcCst|jj|��S)zF
        Device file name inside ``sysfs`` as unicode string.
        )rr$Zudev_device_get_sysname)r`r!r!r"r+dszDevice.sys_namecCs |jj|�}|dk	rt|�SdS)a�
        The trailing number of the :attr:`sys_name` as unicode string, or
        ``None``, if the device has no trailing number in its name.

        .. note::

           The number is returned as unicode string to preserve the exact
           format of the number, especially any leading zeros:

           >>> from pyudev import Context, Device
           >>> context = Context()
           >>> device = Devices.from_path(context, '/sys/devices/LNXSYSTM:00')
           >>> device.sys_number
           u'00'

           To work with numbers, explicitly convert them to ints:

           >>> int(device.sys_number)
           0

        .. versionadded:: 0.11
        N)r$Zudev_device_get_sysnumr)r`r.r!r!r"�
sys_numberlszDevice.sys_numbercCs$|jj|�}|dk	rt|�S|SdS)a�
        Device type as unicode string, or ``None``, if the device type is
        unknown.

        >>> from pyudev import Context
        >>> context = Context()
        >>> for device in context.list_devices(subsystem='net'):
        ...     '{0} - {1}'.format(device.sys_name, device.device_type or 'ethernet')
        ...
        u'eth0 - ethernet'
        u'wlan0 - wlan'
        u'lo - ethernet'
        u'vboxnet0 - ethernet'

        .. versionadded:: 0.10
        N)r$Zudev_device_get_devtyper)r`r5r!r!r"r5�szDevice.device_typecCs |jj|�}|dk	rt|�SdS)z�
        The driver name as unicode string, or ``None``, if there is no
        driver for this device.

        .. versionadded:: 0.5
        N)r$Zudev_device_get_driverr)r`�driverr!r!r"rm�sz
Device.drivercCs |jj|�}|dk	rt|�SdS)a�
        Absolute path to the device node of this device as unicode string or
        ``None``, if this device doesn't have a device node.  The path
        includes the device directory (see :attr:`Context.device_path`).

        This path always points to the actual device node associated with
        this device, and never to any symbolic links to this device node.
        See :attr:`device_links` to get a list of symbolic links to this
        device node.

        .. warning::

           For devices created with :meth:`from_device_file()`, the value of
           this property is not necessary equal to the ``filename`` given to
           :meth:`from_device_file()`.
        N)r$Zudev_device_get_devnoder)r`Znoder!r!r"�device_node�szDevice.device_nodecCs|jj|�S)a
        The device number of the associated device as integer, or ``0``, if no
        device number is associated.

        Use :func:`os.major` and :func:`os.minor` to decompose the device
        number into its major and minor number:

        >>> import os
        >>> from pyudev import Context, Device
        >>> context = Context()
        >>> sda = Devices.from_name(context, 'block', 'sda')
        >>> sda.device_number
        2048L
        >>> (os.major(sda.device_number), os.minor(sda.device_number))
        (8, 0)

        For devices with an associated :attr:`device_node`, this is the same as
        the ``st_rdev`` field of the stat result of the :attr:`device_node`:

        >>> os.stat(sda.device_node).st_rdev
        2048

        .. versionadded:: 0.11
        )r$Zudev_device_get_devnum)r`r!r!r"r6�szDevice.device_numbercCst|jj|��S)ai
        ``True``, if the device is initialized, ``False`` otherwise.

        A device is initialized, if udev has already handled this device and
        has set up device node permissions and context, or renamed a network
        device.

        Consequently, this property is only implemented for devices with a
        device node or for network devices.  On all other devices this property
        is always ``True``.

        It is *not* recommended, that you use uninitialized devices.

        .. seealso:: :attr:`time_since_initialized`

        .. udevversion:: 165

        .. versionadded:: 0.8
        )�boolr$Zudev_device_get_is_initialized)r`r!r!r"�is_initialized�szDevice.is_initializedcCs|jj|�}t|d�S)a�
        The time elapsed since initialization as :class:`~datetime.timedelta`.

        This property is only implemented on devices, which need to store
        properties in the udev database.  On all other devices this property is
        simply zero :class:`~datetime.timedelta`.

        .. seealso:: :attr:`is_initialized`

        .. udevversion:: 165

        .. versionadded:: 0.8
        )�microseconds)r$Z&udev_device_get_usec_since_initializedr	)r`rqr!r!r"�time_since_initialized�szDevice.time_since_initializedccs4|jj|�}x"t|j|�D]\}}t|�VqWdS)a�
        An iterator, which yields the absolute paths (including the device
        directory, see :attr:`Context.device_path`) of all symbolic links
        pointing to the :attr:`device_node` of this device.  The paths are
        unicode strings.

        UDev can create symlinks to the original device node (see
        :attr:`device_node`) inside the device directory.  This is often
        used to assign a constant, fixed device node to devices like
        removeable media, which technically do not have a constant device
        node, or to map a single device into multiple device hierarchies.
        The property provides access to all such symbolic links, which were
        created by UDev for this device.

        .. warning::

           Links are not necessarily resolved by
           :meth:`Devices.from_device_file()`. Hence do *not* rely on
           ``Devices.from_device_file(context, link).device_path ==
           device.device_path`` from any ``link`` in ``device.device_links``.
        N)r$Z#udev_device_get_devlinks_list_entryrr)r`Zdevlinks�namerRr!r!r"�device_linksszDevice.device_linkscCs |jj|�}|dk	rt|�SdS)a
        The device event action as string, or ``None``, if this device was not
        received from a :class:`Monitor`.

        Usual actions are:

        ``'add'``
          A device has been added (e.g. a USB device was plugged in)
        ``'remove'``
          A device has been removed (e.g. a USB device was unplugged)
        ``'change'``
          Something about the device changed (e.g. a device property)
        ``'online'``
          The device is online now
        ``'offline'``
          The device is offline now

        .. warning::

           Though the actions listed above are the most common, this property
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