File: //lib/python3.9/site-packages/rhn/__pycache__/rhnLockfile.cpython-39.pyc
a
0Q=j. � @ s� d dl Z d dlZd dlZd dlZd dlmZmZ d dlmZ d dlZG dd� de �Z
G dd� d�Z dd � Z e
d
kr�e�e � p~d � dS ) � N)� EWOULDBLOCK�EEXIST)�bstrc @ s e Zd ZdZdS )�LockfileLockedExceptionz$thrown ONLY when pid file is locked.N)�__name__�
__module__� __qualname__�__doc__� r
r
�3/usr/lib/python3.9/site-packages/rhn/rhnLockfile.pyr s r c @ s* e Zd ZdZd dd�Zdd� Zdd� ZdS )
�Lockfilez�class that provides simple access to a PID-style lockfile.
methods: __init__(lockfile), acquire(), and release()
NOTE: currently acquires upon init
The *.pid file will be acquired, or an LockfileLockedException is raised.
Nc C s t j�t j�t j�|���| _|| _| js4t �� | _t j�| j�}t j� |�s�zt �
|� W n6 t y� t �
� d }t|d�r�|jtkr�n� Y n0 t �| jt jt jB t jB t jB t jB d�| _t �| j�}t�|j�r�|j t � � k�rt � | j� t d| jt � � |j|j f ��| � � dS )zlcreate (if need be), and acquire lock on lockfile
lockfile example: '/var/run/up2date.pid'
� �errnoi� zSrefusing to use lockfile %s: not a regular file owned by uid %d (mode 0o%o, uid %d)N) �os�path�abspath�
expanduser�
expandvars�lockfile�pid�getpid�dirname�exists�makedirs�OSError�sys�exc_info�hasattrr r �open�O_RDWR�O_CREAT�O_SYNC�
O_NOFOLLOW� O_CLOEXEC�f�fstat�stat�S_ISREG�st_mode�st_uid�geteuid�close�acquire)�selfr r r �e�str
r
r �__init__% sD
��
��� ��zLockfile.__init__c C s� zt �| jt jt jB � W nB ty\ t�� d jt krVt
d| j dt�� d ��n� Y n0 t � | jt j d� t
�| jd� t
�| jtt| j�d �� dS )z5acquire the lock; else raise LockfileLockedException.r
zcannot acquire lock on %s.N� r �
)�fcntl�flockr$ ZLOCK_EXZLOCK_NB�IOErrorr r r r r r ZF_SETFDr � ftruncate�writer �strr )r- r
r
r r, ^ s �zLockfile.acquirec C s| z4t �| j�}t �| j�}|j|jko0|j|jk}W n tyJ d}Y n0 |r\t �| j� t �
| jt j � t � | j� d S )NF)
r r% r$ �lstatr �st_dev�st_inor �unlinkr3 r4 ZLOCK_UNr+ )r- Zfd_stZpath_stZ
same_inoder
r
r �releaseo s
�
zLockfile.release)N)r r r r r0 r, r= r
r
r
r r s
9r c C sx z t d�} W n4 ty@ tj�dt�� d � t�d� Y n40 td� td� ddl}|� d � | �
� td
� dS ) z test codez
./test.pidz%s
r
���zlock acquired z...sleeping for 10 secondsr N�
zlock released ) r r r �stderrr7 r �exit�print�time�sleepr= )�LrC r
r
r �main� s
rF �__main__)r r r& r3 r r r Zrhn.i18nr � Exceptionr r rF r rA r
r
r
r �<module> s h