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o ;jm � @ sx d Z ddlZddlZddlZddlZddlZddlZe�e �Z dd� Z ddd�Z dd� Z dd d �Zdd d�Zdd� ZdS )z� Module for interfacing with SysFS .. seealso:: https://www.kernel.org/doc/Documentation/filesystems/sysfs.txt .. versionadded:: 2016.3.0 � Nc C s t jj�� S )z Only work on Linux )�salt�utils�platformZis_linux� r r �F/opt/saltstack/salt/lib/python3.10/site-packages/salt/modules/sysfs.py� __virtual__ s r c C s> t | �} | du r dS tj�| �r| S |durt| |�S t| �S )z� Access/write a SysFS attribute. If the attribute is a symlink, its destination is returned :return: value or bool CLI Example: .. code-block:: bash salt '*' sysfs.attr block/sda/queue/logical_block_size FN)�target�os�path�isdir�write�read)�key�valuer r r �attr s r c C s� z6t | �} t�d|| � tjj�| d��}|�tjj� |� d��� W d � W dS 1 s/w Y W dS t y@ Y dS w )z� Write a SysFS attribute/action CLI Example: .. code-block:: bash salt '*' sysfs.write devices/system/cpu/cpu0/cpufreq/scaling_governor 'performance' zWriting %s to %s�w� NTF) r �log�tracer r �filesZfopenr Z stringutilsZto_str� Exception)r r Ztwriterr r r r 3 s (� �r � c C s� t | t�s i }| D ]}ttj�||��}|dur |||< q |S ttj�|| ��} | du r.dS tj�| �rvt| �}i }|d |d D ]1}ttj�| |��}|durs|� d�} | � � }|} | ro| D ]} | | vrji | | < | | } q`|| |< qB|S z[t � d| � t� t�| tjtjB ���=} | �� �� } | s� W d � W dS zt| �} W n ty� zt| �} W n ty� Y nw Y nw | W d � W S 1 s�w Y W dS ty� Y dS w )a Read from SysFS :param key: file or path in SysFS; if key is a list then root will be prefixed on each key :return: the full (tree of) SysFS attributes under key CLI Example: .. code-block:: bash salt '*' sysfs.read class/net/em1/statistics F�r�rw�/z Reading %s...N)� isinstance�strr r r �joinr r � interfaces�split�popr r �fdopen�open�O_RDONLY� O_NONBLOCK�strip�intr �float)r �root�resZakeyZares�keys�resultZsubkeyZsubvalZsubkeysZ subresultZskeyZtreader�valr r r r G sd � � � ���(� �r Tc C sT | � d�s tj�d| �} tj�| �} tj�| �s t�d| � dS |r$| S tj�| �S )a Return the basename of a SysFS key path :param key: the location to resolve within SysFS :param full: full path instead of basename :return: fullpath or basename of path CLI Example: .. code-block:: bash salt '*' sysfs.read class/ttyS0 z/syszUnknown SysFS key %sF) � startswithr r r �realpath�existsr �debug�basename)r �fullr r r r � s r c C s� t | �} | du stj�| �st�d| � dS g }g }g }tjjj| dd�D ]Q\}}}|D ]I}tj� ||�}tj� |�s<q,t� |�j } t t j| @ �} t t j| @ �} tj�|| �} | rg| ra|�| � q,|�| � q,| ro|�| � q,t�d|� q,q%|||d�S )a� Generate a dictionary with all available interfaces relative to root. Symlinks are not followed. CLI Example: .. code-block:: bash salt '*' sysfs.interfaces block/bcache0/bcache Output example: .. code-block:: json { "r": [ "state", "partial_stripes_expensive", "writeback_rate_debug", "stripe_size", "dirty_data", "stats_total/cache_hits", "stats_total/cache_bypass_misses", "stats_total/bypassed", "stats_total/cache_readaheads", "stats_total/cache_hit_ratio", "stats_total/cache_miss_collisions", "stats_total/cache_misses", "stats_total/cache_bypass_hits", ], "rw": [ "writeback_rate", "writeback_rate_update_seconds", "cache_mode", "writeback_delay", "label", "writeback_running", "writeback_metadata", "running", "writeback_rate_p_term_inverse", "sequential_cutoff", "writeback_percent", "writeback_rate_d_term", "readahead" ], "w": [ "stop", "clear_stats", "attach", "detach" ] } .. note:: * 'r' interfaces are read-only * 'w' interfaces are write-only (e.g. actions) * 'rw' are interfaces that can both be read or written FzSysFS %s not a dir)� followlinksz#Unable to find any interfaces in %s)r r r )r r r r r �errorr r Zos_walkr �isfile�stat�st_mode�bool�S_IRUSR�S_IWUSR�relpath�append�warning) r( Z readwritesZreadsZwritesr �_r ZafileZcanpathZ stat_modeZis_rZis_wr; r r r r � s2 ; � r )N)r )T)�__doc__�loggingr r6 Zsalt.utils.filesr Zsalt.utils.pathZsalt.utils.platform� getLogger�__name__r r r r r r r r r r r �<module> s B
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