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o �b� � @ s� U d Z ddlZddlmZmZmZ ddlmZ ddl m Z m Z ddl m Z mZ ddlmZ ddlmZ G d d � d e �Zee�G d d � d ��Zee�G d d� d��Ze� Zeed< G dd� de�ZG dd� de�ZG dd� de�ZG dd� de�Z dS )z PID file. � N)�getpid�kill�name)� TracebackType)�Optional�Type)� Interface� implementer)�Logger)�FilePathc @ sx e Zd ZdZdefdd�Zddd�Zddd �Zdefd d �Z dd d �Z de e e de e de e de e fdd�ZdS )�IPIDFilez5 Manages a file that remembers a process ID. �returnc C � dS )a+ Read the process ID stored in this PID file. @return: The contained process ID. @raise NoPIDFound: If this PID file does not exist. @raise EnvironmentError: If this PID file cannot be read. @raise ValueError: If this PID file's content is invalid. N� r r r �E/usr/lib/python3/dist-packages/twisted/application/runner/_pidfile.py�read � z IPIDFile.readNc C r )z� Store the PID of the current process in this PID file. @raise EnvironmentError: If this PID file cannot be written. Nr r r r r �writeRunningPID$ r zIPIDFile.writeRunningPIDc C r )zm Remove this PID file. @raise EnvironmentError: If this PID file cannot be removed. Nr r r r r �remove+ r zIPIDFile.removec C r )a Determine whether there is a running process corresponding to the PID in this PID file. @return: True if this PID file contains a PID and a process with that PID is currently running; false otherwise. @raise EnvironmentError: If this PID file cannot be read. @raise InvalidPIDFileError: If this PID file's content is invalid. @raise StalePIDFileError: If this PID file's content refers to a PID for which there is no corresponding running process. Nr r r r r � isRunning2 r zIPIDFile.isRunningc C r )z� Enter a context using this PIDFile. Writes the PID file with the PID of the running process. @raise AlreadyRunningError: A process corresponding to the PID in this PID file is already running. Nr r r r r � __enter__@ r zIPIDFile.__enter__�excType�excValue� tracebackc C r )zS Exit a context using this PIDFile. Removes the PID file. Nr )r r r r r r �__exit__J r zIPIDFile.__exit__�r N)r r )�__name__� __module__� __qualname__�__doc__�intr r r �boolr r r r � BaseExceptionr r r r r r r s ����r c @ s� e Zd ZdZe� Zededefdd��Z de ddfdd �Z defd d �Z deddfd d �Z d dd�Zd dd�Zdefdd�Zededefdd��Zd dd�Zdeee dee dee ddfdd �ZdS ) �PIDFilez� Concrete implementation of L{IPIDFile}. This implementation is presently not supported on non-POSIX platforms. Specifically, calling L{PIDFile.isRunning} will raise L{NotImplementedError}. �pidr c C s t | �� d��� S )z� Format a PID file's content. @param pid: A process ID. @return: Formatted PID file contents. � )r �encode�r$ r r r �_formatb s zPIDFile._format�filePathNc C s || _ dS )zD @param filePath: The path to the PID file on disk. N)r) )�selfr) r r r �__init__m s zPIDFile.__init__c C s� d}z | j �� � }|D ]} W d � n1 sw Y W n ty5 } z |jtjkr0td��� d }~ww zt|�W S tyI td|����w )N� �PID file does not existz#non-integer PID value in PID file: ) r) �open�OSError�errno�ENOENT� NoPIDFoundr � ValueError�InvalidPIDFileError)r* � pidString�fh�er r r r s s* � �� �� ��z PIDFile.readc C s | j �| j|d�� dS )z� Store a PID in this PID file. @param pid: A PID to store. @raise EnvironmentError: If this PID file cannot be written. r' N)r) � setContentr( �r* r$ r r r �_write� s zPIDFile._writec C s | � t� � d S �N)r: r �r* r r r r � s zPIDFile.writeRunningPIDc C s | j �� d S r; )r) r r< r r r r � � zPIDFile.removec C sB z| � � }W n ty Y dS w tdkr| �|�S tdt� ���)NF�posixz isRunning is not implemented on )r r2 � SYSTEM_NAME�_pidIsRunningPOSIX�NotImplementedErrorr9 r r r r � s � zPIDFile.isRunningc C sZ zt | d� W dS ty, } z|jtjkrtd��|jtjkr'W Y d}~dS � d}~ww )a1 POSIX implementation for running process check. Determine whether there is a running process corresponding to the given PID. @param pid: The PID to check. @return: True if the given PID is currently running; false otherwise. @raise EnvironmentError: If this PID file cannot be read. @raise InvalidPIDFileError: If this PID file's content is invalid. @raise StalePIDFileError: If this PID file's content refers to a PID for which there is no corresponding running process. r z'PID file refers to non-existing processNT)r r/ r0 �ESRCH�StalePIDFileError�EPERM)r$ r7 r r r r@ � s � ��zPIDFile._pidIsRunningPOSIXc C s> z | � � rt� �W n ty | j�d� Y nw | �� | S )Nz&Replacing stale PID file: {log_source})r �AlreadyRunningErrorrC �_log�infor r< r r r r � s � �zPIDFile.__enter__r r r c C s | � � d S r; )r �r* r r r r r r r � s zPIDFile.__exit__r )r r# )r r r r r rF � staticmethodr �bytesr( r r+ r r: r r r! r r@ r r r r" r r r r r r r# V s. ����r# c @ s� e Zd ZdZddd�Zdefdd�Zdeddfd d �Zdd d �Zdd d�Z de fdd�Z ddd�Z de ee de e de e ddfdd�ZdS )� NonePIDFilez� PID file implementation that does nothing. This is meant to be used as a "active None" object in place of a PID file when no PID file is desired. r Nc C � d S r; r r< r r r r+ � � zNonePIDFile.__init__c C s t d��)Nr- )r2 r< r r r r � s zNonePIDFile.readr$ c C � t tjd��)z� Store a PID in this PID file. @param pid: A PID to store. @raise EnvironmentError: If this PID file cannot be written. @note: This implementation always raises an L{EnvironmentError}. zOperation not permitted)r/ r0 rD r9 r r r r: � s zNonePIDFile._writec C s | � d� d S )Nr )r: r< r r r r � r= zNonePIDFile.writeRunningPIDc C rN )NzNo such file or directory)r/ r0 r1 r< r r r r � s zNonePIDFile.removec C r )NFr r< r r r r � rM zNonePIDFile.isRunningc C s | S r; r r< r r r r � rM zNonePIDFile.__enter__r r r c C rL r; r rH r r r r � s zNonePIDFile.__exit__r )r rK )r r r r r+ r r r: r r r! r r r r r" r r r r r r rK � s$ ����rK � nonePIDFilec @ � e Zd ZdZdS )rE z% Process is already running. N�r r r r r r r r rE � rE c @ rP )r4 z( PID file contents are invalid. NrQ r r r r r4 rR r4 c @ rP )rC z[ PID file contents are valid, but there is no process with the referenced PID. NrQ r r r r rC rR rC c @ rP )r2 z# No PID found in PID file. NrQ r r r r r2 rR r2 ) r r0 �osr r r r? �typesr �typingr r �zope.interfacer r �twisted.loggerr �twisted.python.filepathr r r# rK rO �__annotations__� ExceptionrE r4 rC r2 r r r r �<module> s$ By/
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