Current File : //snap/core22/current/usr/lib/python3/dist-packages/pyudev/__pycache__/discover.cpython-310.pyc
o
8g+^w, � @ s� d Z ddlmZ ddlmZ ddlmZ ddlmZ ddlZddlZddlZddl Z ddl
Z
ddl m Z ddl
mZ d d
� Ze
�ej�G d d � d e��ZG d
d� de�ZG dd� de�ZG dd� de�ZG dd� de�ZG dd� de�ZdS )z�
pyudev.discover
===============
Tools to discover a device given limited information.
.. moduleauthor:: mulhern <amulhern@redhat.com>
� )�absolute_import)�division)�print_function)�unicode_literalsN��DeviceNotFoundError)�Devicesc s t �� �� fdd��}|S )z\
Allow Device discovery methods to return None instead of raising an
exception.
c s& z� | i |��W S t y Y dS w )z�
Returns result of calling ``func`` on ``args``, ``kwargs``.
Returns None if ``func`` raises :exc:`DeviceNotFoundError`.
Nr )�args�kwargs��func� �1/usr/lib/python3/dist-packages/pyudev/discover.py�the_func0 s
�z wrap_exception.<locals>.the_func)� functools�wraps)r r r
r r �wrap_exception* s
r c @ sL e Zd ZdZeejdd� ��Zeejdd� ��Zedd� �Z edd � �Z
d
S ) �
HypothesiszM
Represents a hypothesis about the meaning of the device identifier.
c C � t � �)a�
Match the given string according to the hypothesis.
The purpose of this method is to obtain a value corresponding to
``value`` if that is possible. It may use a regular expression, but
in general it should just return ``value`` and let the lookup method
sort out the rest.
:param str value: the string to inspect
:returns: the matched thing or None if unmatched
:rtype: the type of lookup's key parameter or NoneType
��NotImplementedError��cls�valuer
r
r �matchD s zHypothesis.matchc C r )aN
Lookup the given string according to the hypothesis.
:param Context context: the pyudev context
:param key: a key with which to lookup the device
:type key: the type of match's return value if not None
:returns: a list of Devices obtained
:rtype: frozenset of :class:`Device`
r )r �context�keyr
r
r �lookupU s zHypothesis.lookupc C s dS )z�
A potentially expensive method that may allow an :class:`Hypothesis`
to find devices more rapidly or to find a device that it would
otherwise miss.
:param Context context: the pyudev context
Nr
�r r r
r
r �setupc s zHypothesis.setupc C s$ | � |�}|dur| �||�S t� S )a
Get any devices that may correspond to the given string.
:param Context context: the pyudev context
:param str value: the value to look for
:returns: a list of devices obtained
:rtype: set of :class:`Device`
N)r r � frozenset)r r r r r
r
r � get_devicesn s
zHypothesis.get_devicesN) �__name__�
__module__� __qualname__�__doc__� classmethod�abc�abstractmethodr r r r! r
r
r
r r > s
r c @ sL e Zd ZdZedd� �Zedd� �Zedd� �Zedd � �Zed
d � �Z d S )
�DeviceNumberHypothesisz�
Represents the hypothesis that the device is a device number.
The device may be separated into major/minor number or a composite number.
c C s8 t �d�}|�|�}|ot�t|�d��t|�d���S )z�
Match the number under the assumption that it is a major,minor pair.
:param str value: value to match
:returns: the device number or None
:rtype: int or NoneType
z#^(?P<major>\d+)(\D+)(?P<minor>\d+)$�major�minor)�re�compiler �os�makedev�int�group)r r �major_minor_rer r
r
r �_match_major_minor� s
�z)DeviceNumberHypothesis._match_major_minorc C s& t �d�}|�|�}|ot|�d��S )z�
Match the number under the assumption that it is a single number.
:param str value: value to match
:returns: the device number or None
:rtype: int or NoneType
z^(?P<number>\d+)$�number)r, r- r r0 r1 )r r � number_rer r
r
r �
_match_number� s
z$DeviceNumberHypothesis._match_numberc C s | � |�p | �|�S )z�
Match the number under the assumption that it is a device number.
:returns: the device number or None
:rtype: int or NoneType
)r3 r6 r r
r
r r � s z DeviceNumberHypothesis.matchc C s |j }t�tj�|d��S )z�
Find subsystems in /sys/dev.
:param Context context: the context
:returns: a lis of available subsystems
:rtype: list of str
�dev)�sys_pathr. �listdir�path�join)r r r8 r
r
r �find_subsystems� s z&DeviceNumberHypothesis.find_subsystemsc �8 t tj��� ��fdd�| �� �D �}tdd� |D ��S )z�
Lookup by the device number.
:param Context context: the context
:param int key: the device number
:returns: a list of matching devices
:rtype: frozenset of :class:`Device`
c 3 � � | ] }�� |��V qd S �Nr
��.0�s�r r r r
r � <genexpr>� � � z0DeviceNumberHypothesis.lookup.<locals>.<genexpr>c s � � | ] }|d ur|V qd S r? r
�rA �rr
r
r rD � rE )r r �from_device_numberr< r �r r r �resr
rC r r � �
z DeviceNumberHypothesis.lookupN)
r" r# r$ r% r& r3 r6 r r< r r
r
r
r r) | s
r) c @ s( e Zd ZdZedd� �Zedd� �ZdS )�DevicePathHypothesiszG
Discover the device assuming the identifier is a device path.
c C � |S )z�
Match ``value`` under the assumption that it is a device path.
:returns: the device path or None
:rtype: str or NoneType
r
r r
r
r r � � zDevicePathHypothesis.matchc C s( t tj�||�}|durt|f�S t� S )��
Lookup by the path.
:param Context context: the context
:param str key: the device path
:returns: a list of matching devices
:rtype: frozenset of :class:`Device`
N)r r � from_pathr rJ r
r
r r � s
zDevicePathHypothesis.lookupN)r" r# r$ r% r& r r r
r
r
r rM � s
rM c @ s4 e Zd ZdZedd� �Zedd� �Zedd� �ZdS ) �DeviceNameHypothesiszf
Discover the device assuming the input is a device name.
Try every available subsystem.
c s< |j � d}� fdd�|D �}dd� |D �}tdd� |D ��S )z�
Find all subsystems in sysfs.
:param Context context: the context
:rtype: frozenset
:returns: subsystems in sysfs
)�bus�class� subsystemc 3 s � | ]
}t j�� |�V qd S r? �r. r: r; )rA �name�r8 r
r rD � � � z7DeviceNameHypothesis.find_subsystems.<locals>.<genexpr>c s s � | ] }t j�|�r|V qd S r? )r. r: �isdir�rA �dr
r
r rD � � � c s s$ � | ]
}t �|�D ]}|V q qd S r? )r. r9 )rA r\ �nr
r
r rD � s �" )r8 r )r r �dirnames�absnames� realnamesr
rX r r< � s
z$DeviceNameHypothesis.find_subsystemsc C rN )z�
Match ``value`` under the assumption that it is a device name.
:returns: the device path or None
:rtype: str or NoneType
r
r r
r
r r � rO zDeviceNameHypothesis.matchc r= )rP c 3 r> r? r
r@ rC r
r rD rE z.DeviceNameHypothesis.lookup.<locals>.<genexpr>c s rF r? r
rG r
r
r rD rE )r r � from_namer< r rJ r
rC r r rL zDeviceNameHypothesis.lookupN)r" r# r$ r% r& r< r r r
r
r
r rR � s
rR c @ sH e Zd ZdZg d�Zedd� �Zedd� �Zedd� �Zed d
� �Z d S ) �DeviceFileHypothesisz�
Discover the device assuming the value is some portion of a device file.
The device file may be a link to a device node.
) z/devz/dev/disk/by-idz/dev/disk/by-labelz/dev/disk/by-partlabelz/dev/disk/by-partuuidz/dev/disk/by-pathz/dev/disk/by-uuidz/dev/input/by-pathz /dev/mapperz/dev/mdz/dev/vgc C s: |� � }dd� |D �}dd� |D �}ttdd� |D ���S )a7
Get all directories that may contain links to device nodes.
This method checks the device links of every device, so it is very
expensive.
:param Context context: the context
:returns: a sorted list of directories that contain device links
:rtype: list
c s s � | ]
}t |j�r|V qd S r? )�list� device_linksr[ r
r
r rD * rY z5DeviceFileHypothesis.get_link_dirs.<locals>.<genexpr>c s s � | ] }|j D ]}|V qqd S r? )re )rA r\ �lr
r
r rD + r] c s s � | ] }t j�|�V qd S r? )r. r: �dirname)rA rf r
r
r rD , rE )� list_devices�sorted�set)r r �devices�devices_with_links�linksr
r
r �
get_link_dirs s z"DeviceFileHypothesis.get_link_dirsc C s | � |�| _dS )z�
Set the link directories to be used when discovering by file.
Uses `get_link_dirs`, so is as expensive as it is.
:param Context context: the context
N)rn �
_LINK_DIRSr r
r
r r . s zDeviceFileHypothesis.setupc C rN r? r
r r
r
r r 9 s zDeviceFileHypothesis.matchc sn t tj��d�v r�� ��}|durt|f�S t� S �fdd�| jD �}� �fdd�|D �}tdd� |D ��S )a�
Lookup the device under the assumption that the key is part of
the name of a device file.
:param Context context: the context
:param str key: a portion of the device file name
It is assumed that either it is the whole name of the device file
or it is the basename.
A device file may be a device node or a device link.
�/Nc 3 s � | ]
}t j�|� �V qd S r? rV )rA �ld)r r
r rD P rY z.DeviceFileHypothesis.lookup.<locals>.<genexpr>c 3 s � | ]}�� |�V qd S r? r
)rA �f)r r r
r rD Q s � c s rF r? r
r[ r
r
r rD R rE )r r �from_device_filer ro )r r r �device�filesrk r
rC r r = s
zDeviceFileHypothesis.lookupN)
r" r# r$ r% ro r& rn r r r r
r
r
r rc s
rc c @ s4 e Zd ZdZeeeegZdd� Z dd� Z
dd� Z dS ) � Discoveryz1
Provides discovery methods for devices.
c C s | j | _d S r? )� _HYPOTHESES� _hypotheses)�selfr
r
r �__init__` s zDiscovery.__init__c C s | j D ]}|�|� qdS )z
Set up individual hypotheses.
May be an expensive call.
:param Context context: the context
N)rx r )ry r �hypr
r
r r c s
�zDiscovery.setupc s t � �fdd�| jD ��S )z�
Get the devices corresponding to value.
:param Context context: the context
:param str value: some identifier of the device
:returns: a list of corresponding devices
:rtype: frozenset of :class:`Device`
c 3 s& � | ]}|� � ��D ]}|V q
qd S r? )r! )rA �hr\ �r r r
r rD w s � � �z(Discovery.get_devices.<locals>.<genexpr>)r rx )ry r r r
r} r r! n s �zDiscovery.get_devicesN) r" r# r$ r% rc rR r) rM rw rz r r! r
r
r
r rv U s � rv )r% �
__future__r r r r r' r r. r, �six�pyudev._errorsr �
pyudev.devicer r �
add_metaclass�ABCMeta�objectr r) rM rR rc rv r
r
r
r �<module> s(
=G /F
Mini Shell