CasperSecurity
o
`�win/ � @ s� d dl Z d dlZd dlZd dlZd dlZd dlZd dlZd dlZd dlZddl m
Z
ddl m Z ddl m
Z
ddl mZ ddl mZ ddl mZ g d �Zd
Ze�d �ZG d d
� d
e�Zddd�Zdd� Zdd� Zdd� Ze� Zej Z ej Z ej Z ej Z dS )� N� )�
connection)�process)� reduction)�resource_tracker)�spawn)�util)�ensure_running�get_inherited_fds�connect_to_new_process�set_forkserver_preload� �qc @ sD e Zd Zdd� Zdd� Zdd� Zdd� Zd d
� Zd d � Zd
d� Z dS )�
ForkServerc C s. d | _ d | _d | _d | _t�� | _dg| _d S )N�__main__)�_forkserver_address�_forkserver_alive_fd�_forkserver_pid�_inherited_fds� threading�Lock�_lock�_preload_modules��self� r �1/usr/lib/python3.10/multiprocessing/forkserver.py�__init__" s
zForkServer.__init__c C s4 | j �
| �� W d � d S 1 sw Y d S �N)r �_stop_unlockedr r r r �_stop* s
"�zForkServer._stopc C sV | j d u rd S t�| j� d | _t�| j d� d | _ t�| j�s&t�| j� d | _d S )Nr ) r �os�closer �waitpidr � is_abstract_socket_namespacer �unlinkr r r r r / s
zForkServer._stop_unlockedc C s& t dd� | jD ��std��|| _dS )z>Set list of module names to try to load in forkserver process.c s s � | ] }t |�tu V qd S r )�type�str)�.0�modr r r � <genexpr>@ s � z4ForkServer.set_forkserver_preload.<locals>.<genexpr>z&module_names must be a list of stringsN)�allr � TypeError)r �
modules_namesr r r r > s
z!ForkServer.set_forkserver_preloadc C s | j S )z�Return list of fds inherited from parent process.
This returns None if the current process was not started by fork
server.
)r r r r r r
D s z ForkServer.get_inherited_fdsc
C s� | � � t|�d tkrtd��t�tj��X}|�| j� t� � \}}t� � \}}||| j
t � � g}||7 }z,z t
�||� ||fW W t�|� t�|� W d � S t�|� t�|� � t�|� t�|� w 1 sqw Y dS )a; Request forkserver to create a child process.
Returns a pair of fds (status_r, data_w). The calling process can read
the child process's pid and (eventually) its returncode from status_r.
The calling process should write to data_w the pickled preparation and
process data.
� z too many fdsN)r �len�MAXFDS_TO_SEND�
ValueError�socket�AF_UNIX�connectr r! �piper r �getfdr �sendfdsr" )r �fds�client�parent_r�child_w�child_r�parent_w�allfdsr r r r L s0 �
�
�z!ForkServer.connect_to_new_processc s� | j �� t�� | jdur1t�| jtj�\}}|s" W d � dS t�| j� d| _ d| _d| _d}| j
rKddh� t � d�}� fdd�|�
� D �}ni }t�tj��s}t�d�}|�|� t�|�sit�|d � |�� t�� \}}z<z+|�� |g} ||�� || j
|f; }t �� }
|
gt�� } | d
|g7 } t�|
| | �}W n t�|� � W t�|� nt�|� w || _ || _|| _W d � n1 s�w Y W d � dS W d � dS 1 s�w Y dS ) z�Make sure that a fork server is running.
This can be called from any process. Note that usually a child
process will just reuse the forkserver started by its parent, so
ensure_running() will do nothing.
NzCfrom multiprocessing.forkserver import main; main(%d, %d, %r, **%r)� main_path�sys_path�ignorec s i | ] \}}|� v r||�qS r r )r( �x�y�� desired_keysr r �
<dictcomp>� s z-ForkServer.ensure_running.<locals>.<dictcomp>r3 i� z-c) r r r r r! r# �WNOHANGr" r r r r �get_preparation_data�itemsr2 r3 r �arbitrary_address�bindr r$ �chmod�listenr5 �fileno�get_executable� _args_from_interpreter_flags�spawnv_passfds) r �pid�status�cmd�data�listener�address�alive_r�alive_w� fds_to_pass�exe�argsr rD r r i sZ
�
�
� ��"�zForkServer.ensure_runningN)
�__name__�
__module__� __qualname__r r r r r
r r r r r r r s r c C s� |r4d|v r |dur dt �� _z t�|� W t �� `nt �� `w |D ]}zt|� W q" ty3 Y q"w t�� t �
� \}}t � |d� t � |d� dd� }t j
|t jt ji} dd� | �� D �}
t �|� i } tjtj| d ���y} t�� ��b}
| �� t_|
�| tj� |
�|tj� |
�|tj� �z( d
d � |
�� D �}|r�nq�||v r�t � |d �d
ks�J d��t �||v �r t � |d� z t � dt j �\}}W n t y� Y n5w |dkr�n/| �!|d�}|du�rt �"|�}zt#||� W n t$y� Y nw t �%|� nt&�'d| � q�| |v �r�| �(� d ��}t)�*|t+d �}t,|�t+k�r-t-d�.t,|����|^}}}|�%� t �/� }|dk�r�d }z<z | �%� |
�%� ||||g}|�0| �1� � t2||||
�}W n t3�yv t4j5t4�6� � t4j7�8� Y nw W t �9|� n,t �9|� w zt#||� W n
t$�y� Y nw || |< t �%|� |D ]}t �%|� �q�W d � n 1 �s�w Y W n t:�y� } z|j;t;j<k�r̂ W Y d}~nd}~ww q�1 �s�w Y W d � dS 1 �s�w Y dS )zRun forkserver.r NTFc W s d S r r )�_unusedr r r �sigchld_handler� s z main.<locals>.sigchld_handlerc S s i | ] \}}|t � ||��qS r )�signal)r( �sig�valr r r rF � s �zmain.<locals>.<dictcomp>)rN c S s g | ]\}}|j �qS r )�fileobj)r( �key�eventsr r r �
<listcomp>� s zmain.<locals>.<listcomp>r � z Not at EOF?i ���r z.forkserver: waitpid returned unexpected pid %dz Too many ({0:n}) fds to send)=r �current_process� _inheritingr �import_main_path�
__import__� ImportErrorr � _close_stdinr! r5 � set_blockingrb �SIGCHLD�SIGINT�SIG_IGNrI �
set_wakeup_fdr2 r3 � selectors�DefaultSelector� getsockname� _forkserverr �register�
EVENT_READ�select�read�
SystemExitr# rG �ChildProcessError�pop�waitstatus_to_exitcode� write_signed�BrokenPipeErrorr" �warnings�warn�acceptr �recvfdsr0 r/ � RuntimeError�format�fork�extend�values�
_serve_one� Exception�sys�
excepthook�exc_info�stderr�flush�_exit�OSError�errno� ECONNABORTED)� listener_fdrX �preloadr? r@ �modname�sig_r�sig_wra �handlers� old_handlers� pid_to_fdrV �selector�rfdsrR �stsr; �
returncode�sr8 r< �code�
unused_fds�fd�er r r �main� s�
� ��
�
�
�
� ��
��
����
� ��& ����8�r� c C sh t �d� |�� D ]
\}}t � ||� q |D ]}t�|� q|^t_tj_ t_
t� | �}t �
| |�}|S )Nrj )rb ru rI r! r" ry r r �_resource_tracker�_fdr �dupr �_main) r< r8 r� r� rc rd r� �parent_sentinelr� r r r r� + s
�
r� c C sX d}t j}t|�|k r%t�| |t|� �}|std��||7 }t|�|k s t �|�d S )Nri zunexpected EOFr )�
SIGNED_STRUCT�sizer/ r! r} �EOFError�unpack)r� rU �lengthr� r r r � read_signedB s �r� c C sB t �|�}|r t�| |�}|dkrtd��||d � }|sd S d S )Nr zshould not get here)r� �packr! �writer� )r� �n�msg�nbytesr r r r� L s
�r� )NN) r� r! rv rb r2 �structr� r r� � r r �contextr r r r �__all__r0 �Structr� �objectr r� r� r� r� ry r r
r r r r r r �<module> s<