Your IP : 3.145.70.108
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