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Editing: _pidfile.cpython-38.pyc
U W[S � @ s� d Z ddlZddlmZmZmZ ddlmZm Z ddl m Z G dd� de�Z e e �G dd � d e ��Ze e �G d d � d e ��Ze� ZG d d � d e�ZG dd� de�ZG dd� de�ZG dd� de�ZdS )z PID file. � N)�getpid�kill�name)� Interface� implementer)�Loggerc @ s@ e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd d � Z dS )�IPIDFilez5 Manages a file that remembers a process ID. c C s dS )aB Read the process ID stored in this PID file. @return: The contained process ID. @rtype: L{int} @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 s z IPIDFile.readc C s dS )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$ s zIPIDFile.writeRunningPIDc C s dS )zm Remove this PID file. @raise EnvironmentError: If this PID file cannot be removed. Nr r r r r �remove, s zIPIDFile.removec C s dS )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. @rtype: L{bool} @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 � isRunning4 s zIPIDFile.isRunningc C s dS )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__D s zIPIDFile.__enter__c C s dS )zS Exit a context using this PIDFile. Removes the PID file. Nr )�excType�excValue� tracebackr r r �__exit__O s zIPIDFile.__exit__N) �__name__� __module__� __qualname__�__doc__r r r r r r r r r r r s r c @ sn e Zd ZdZe� Zedd� �Zdd� Zdd� Z dd � Z d d � Z d d � Z dd� Z edd� �Zdd� Zdd� ZdS )�PIDFilez� Concrete implementation of L{IPIDFile} based on C{IFilePath}. This implementation is presently not supported on non-POSIX platforms. Specifically, calling L{PIDFile.isRunning} will raise L{NotImplementedError}. c C s d� t| ���d�S )z� Format a PID file's content. @param pid: A process ID. @type pid: int @return: Formatted PID file contents. @rtype: L{bytes} z{} zutf-8)�format�int�encode��pidr r r �_formate s zPIDFile._formatc C s || _ dS )zi @param filePath: The path to the PID file on disk. @type filePath: L{IFilePath} N)�filePath)�selfr r r r �__init__s s zPIDFile.__init__c C s� d}z(| j �� �}|D ]} q qW 5 Q R X W n8 tk rd } z|jtjkrRtd��� W 5 d }~X Y nX z t|�W S tk r� td� |���Y nX d S )N� �PID file does not existz'non-integer PID value in PID file: {!r}) r �open�OSError�errno�ENOENT� NoPIDFoundr � ValueError�InvalidPIDFileErrorr )r Z pidStringZfh�er r r r { s �z PIDFile.readc C s | j �| j|d�� dS )z� Store a PID in this PID file. @param pid: A PID to store. @type pid: L{int} @raise EnvironmentError: If this PID file cannot be written. r N)r Z 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 � s zPIDFile.removec C sH z | � � }W n tk r" Y dS X tdkr6| �|�S td�t���d S )NF�posixz"isRunning is not implemented on {})r r( � SYSTEM_NAME�_pidIsRunningPOSIX�NotImplementedErrorr r, r r r r � s �zPIDFile.isRunningc C sh zt | d� W nP tk r^ } z2|jtjkr6td��n|jtjkrLW Y � dS � W 5 d}~X Y nX dS dS )a" POSIX implementation for running process check. Determine whether there is a running process corresponding to the given PID. @return: True if the given PID is currently running; false otherwise. @rtype: L{bool} @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 processTN)r r% r& ZESRCH�StalePIDFileError�EPERM)r r+ r r r r2 � s � zPIDFile._pidIsRunningPOSIXc C s@ z| � � rt� �W n tk r2 | j�d� Y nX | �� | S )Nz&Replacing stale PID file: {log_source})r �AlreadyRunningErrorr4 �_log�infor r/ r r r r � s zPIDFile.__enter__c C s | � � d S r. )r �r r r r r r r r � s zPIDFile.__exit__N)r r r r r r7 � staticmethodr r! r r- r r r r2 r r r r r r r X s r c @ sP e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd d � Z dd� Z dd� Z dS )� 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. c C s d S r. r r/ r r r r! � s zNonePIDFile.__init__c C s t d��d S )Nr# )r( r/ r r r r � s zNonePIDFile.readc C s t tjd��dS )z� Store a PID in this PID file. @param pid: A PID to store. @type pid: L{int} @raise EnvironmentError: If this PID file cannot be written. @note: This implementation always raises an L{EnvironmentError}. zOperation not permittedN)r% r& r5 r, r r r r- � s zNonePIDFile._writec C s | � d� d S )Nr )r- r/ r r r r � s zNonePIDFile.writeRunningPIDc C s t tjd��d S )NzNo such file or directory)r% r& r' r/ r r r r s zNonePIDFile.removec C s dS )NFr r/ r r r r s zNonePIDFile.isRunningc C s | S r. r r/ r r r r s zNonePIDFile.__enter__c C s d S r. r r9 r r r r s zNonePIDFile.__exit__N) r r r r r! r r- r r r r r r r r r r; � s r; c @ s e Zd ZdZdS )r6 z% Process is already running. N�r r r r r r r r r6 s r6 c @ s e Zd ZdZdS )r* z( PID file contents are invalid. Nr< r r r r r* s r* c @ s e Zd ZdZdS )r4 z[ PID file contents are valid, but there is no process with the referenced PID. Nr< r r r r r4 $ s r4 c @ s e Zd ZdZdS )r( z# No PID found in PID file. Nr< r r r r r( , s r( )r r& �osr r r r1 Zzope.interfacer r Ztwisted.loggerr r �objectr r; Z nonePIDFile� Exceptionr6 r* r4 r( r r r r �<module> s F 3
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