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Edit: forkserver.cpython-37.opt-1.pyc
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This returns None if the current process was not started by fork server. )r )r r r r r C s z ForkServer.get_inherited_fdsc C s� | � � t|�d tkr td��t�tj���}|�| j� t� � \}}t� � \}}||| j t � � g}||7 }z<yt �||� ||fS t�|� t�|� � Y nX W dt�|� t�|� X W dQ R X 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_UNIXZconnectr r �piper r Zgetfdr Zsendfdsr )r �fdsZclientZparent_r�child_w�child_rZparent_wZallfdsr r r r K s& z!ForkServer.connect_to_new_processc s� | j ��t t�� | jdk rVt�| jtj�\}}|s8dS t�| j� d| _ d| _d| _d}| j r�ddh� t � d�}� fdd�|� � D �}ni }t�tj���}t�d�}|�|� t�|�s�t�|d � |�� t�� \}}ztyV|�� |g} ||�� || j |f; }t �� } | gt�� } | d |g7 } t�| | | �}W n t�|� � Y nX W dt�|� X || _ || _|| _W dQ R X W dQ R X 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 | ]\}}|� kr||�qS r r )r$ �x�y)� desired_keysr r � <dictcomp>� s z-ForkServer.ensure_running.<locals>.<dictcomp>r. i� z-c) r r r r r r �WNOHANGr r r r r Zget_preparation_data�itemsr- r. r Zarbitrary_addressZbindr Z is_abstract_socket_namespace�chmodZlistenr/ �filenoZget_executableZ _args_from_interpreter_flagsZspawnv_passfds) r �pidZstatus�cmd�data�listenerZaddress�alive_rZalive_wZ fds_to_passZexe�argsr )r8 r r h sL zForkServer.ensure_runningN) �__name__� __module__� __qualname__r r r r r r r r r r r r s r c C s� |rhd|kr8|dk r8dt �� _zt�|� W dt �� `X x.|D ]&}y t|� W q> tk rb Y q>X q>W t�� t � � \}}t � |d� t � |d� dd� }t j |t jt ji} dd� | �� D �} t �|� i } tjtj| d ���} t�� ���} | �� t_| �| tj� | �|tj� | �|tj� �x��yrx d d � | �� D �}|�r,P �q,W ||k�rZt �||k�rJt � |d � x�yt � d t j �\}}W n t k �r� P Y nX |dk�r�P | �!|d�}|dk �r6t �"|��r�t �#|� }n&t �$|��s�t%d�&||���t �'|�}yt(||� W n t)k �r( Y nX t �*|� nt+�,d| � �qrW | |k�r�| �-� d ��0}t.�/|t0d �}t1|�t0k�r�t2d�&t1|����|^}}}|�*� t �3� }|dk�r<d}zpy<| �*� | �*� ||||g}|�4| �5� � t6|||| �}W n. t7k �r( t8j9t8�:� � t8j;�<� Y nX W dt �=|� X nRyt(||� W n t)k �r` Y nX || |< t �*|� x|D ]}t �*|� �qzW W dQ R X W n4 t>k �r� } z|j?t?j@k�r�� W dd}~X Y nX �q&W W dQ R X W dQ R X dS )zRun forkserver.r NTFc W s d S )Nr )Z_unusedr r r �sigchld_handler� s z main.<locals>.sigchld_handlerc S s i | ]\}}t � ||�|�qS r )�signal)r$ �sig�valr r r r9 � s zmain.<locals>.<dictcomp>)r= c S s g | ]\}}|j �qS r )Zfileobj)r$ �keyZeventsr r r � <listcomp>� s zmain.<locals>.<listcomp>i ���r zChild {0:n} status is {1:n}z.forkserver: waitpid returned unexpected pid %dr z Too many ({0:n}) fds to send)Ar Zcurrent_processZ _inheritingr Zimport_main_path� __import__� ImportErrorr Z _close_stdinr r/ � set_blockingrH �SIGCHLD�SIGINT�SIG_IGNr; � set_wakeup_fdr- r. � selectorsZDefaultSelectorZ getsockname� _forkserverr �registerZ EVENT_READZselect� SystemExit�readr r: �ChildProcessError�pop� WIFSIGNALED�WTERMSIG� WIFEXITED�AssertionError�format� WEXITSTATUS� write_signed�BrokenPipeErrorr �warnings�warnZacceptr Zrecvfdsr+ r* � RuntimeError�fork�extend�values� _serve_one� Exception�sys� excepthook�exc_info�stderr�flush�_exit�OSError�errnoZ ECONNABORTED)Z listener_fdrB Zpreloadr3 r4 �modnameZsig_rZsig_wrG �handlersZ old_handlersZ pid_to_fdrA ZselectorZrfdsr> �stsr1 � returncode�sr0 r2 �code� unused_fds�fd�er r r �main� s� r} c C sd t �d� x |�� D ]\}}t � ||� qW x|D ]}t�|� q2W |^t_tj_ t_ t � | �}|S )NrM ) rH rT r; r r rV r r Z_semaphore_trackerZ_fdr r �_main)r2 r0 rz ru rI rJ r{ ry r r r rj 0 s rj c C sR d}t j}x8t|�|k rBt�| |t|� �}|s8td��||7 }q W t �|�d S )N� zunexpected EOFr )� SIGNED_STRUCT�sizer* r rY �EOFErrorZunpack)r{ r@ �lengthrx r r r � read_signedF s r� c C s@ t �|�}x0|r:t�| |�}|dkr,td��||d � }q W d S )Nr zshould not get here)r� Zpackr �writerf )r{ �n�msg�nbytesr r r rb P s rb )NN) rs r rU rH r- Zstructrl r rd � r r �contextr r r r �__all__r+ ZStructr� �objectr r} rj r� rb rV r r r r r r r r �<module> s<
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