Edit File: rhnLockfile.cpython-36.pyc
3 U��Zc � @ s~ d dl Z d dlZd dlZd dlmZmZ d dlmZ d dlZG dd� de�Z G dd� d�Z dd � Z e d krzej e � pvd � dS ) � N)� EWOULDBLOCK�EEXIST)�bstrc @ s e Zd ZdZdS )�LockfileLockedExceptionz$thrown ONLY when pid file is locked.N)�__name__� __module__� __qualname__�__doc__� r r �!/usr/lib/python3.6/rhnLockfile.pyr s r c @ s* e Zd ZdZd dd�Zdd� Zdd� ZdS ) �Lockfilez�class that provides simple access to a PID-style lockfile. methods: __init__(lockfile), acquire(), and release() NOTE: currently acquires upon init The *.pid file will be acquired, or an LockfileLockedException is raised. Nc C s� t jjt jjt jj|���| _|| _| js4t j� | _t jj| j�}t jj |�s�yt j |� W n8 t k r� t j � d }t|d�r�|jtkr�n� Y nX t j| jt jt jB t jB �| _| j� dS )zlcreate (if need be), and acquire lock on lockfile lockfile example: '/var/run/up2date.pid' � �errnoN)�os�path�abspath� expanduser� expandvars�lockfile�pid�getpid�dirname�exists�makedirs�OSError�sys�exc_info�hasattrr r �open�O_RDWR�O_CREAT�O_SYNC�f�acquire)�selfr r r �er r r �__init__$ s" zLockfile.__init__c C s� yt j| jt jt jB � W nD tk r^ tj� d jt krXt d| j dtj� d ��n� Y nX t j | jt j d� t j| jd� t j| jtt| j�d �� dS )z5acquire the lock; else raise LockfileLockedException.r zcannot acquire lock on %s.N� r � )�fcntl�flockr" ZLOCK_EXZLOCK_NB�IOErrorr r r r r r ZF_SETFDr � ftruncate�writer �strr )r$ r r r r# E s zLockfile.acquirec C s, t j| j� tj| jtj� t j| j� d S )N)r �unlinkr r) r* r" ZLOCK_UN�close)r$ r r r �releaseV s zLockfile.release)N)r r r r r& r# r1 r r r r r s !r c C sz y t d�} W n6 tk rB tjjdtj� d � tjd � Y n4X td� td� ddl}|j d� | j � td � dS ) z test codez ./test.pidz%s r zlock acquired z...sleeping for 10 secondsr N� zlock released ���) r r r �stderrr- r �exit�print�timeZsleepr1 )�Lr7 r r r �main] s r9 �__main__)r r r) r r r Zrhn.i18nr � Exceptionr r r9 r r5 r r r r �<module> s B
Back to File Manager