ó Y[c@sxdZddlZddlZddlZddlZddlmZejeƒZ d„Z de fd„ƒYZ dS(s@Implements file locks for locking files and directories in UNIX.i’’’’N(terrorscCsttjj|dƒƒS(s3Place a lock file on the directory at dir_path. The lock file is placed in the root of dir_path with the name .certbot.lock. :param str dir_path: path to directory :returns: the locked LockFile object :rtype: LockFile :raises errors.LockError: if unable to acquire the lock s .certbot.lock(tLockFiletostpathtjoin(tdir_path((s0/usr/lib/python2.7/dist-packages/certbot/lock.pytlock_dir sRcBsDeZdZd„Zd„Zd„Zd„Zd„Zd„ZRS(sėA UNIX lock file. This lock file is released when the locked file is closed or the process exits. It cannot be used to provide synchronization between threads. It is based on the lock_file package by Martin Horcicka. cCs3tt|ƒjƒ||_d|_|jƒdS(s£Initialize and acquire the lock file. :param str path: path to the file to lock :raises errors.LockError: if unable to acquire the lock N(tsuperRt__init__t_pathtNonet_fdtacquire(tselfR((s0/usr/lib/python2.7/dist-packages/certbot/lock.pyR%s  cCs‹x„|jdkr†tj|jtjtjBdƒ}z,|j|ƒ|j|ƒr_||_nWd|jdkr‚tj |ƒnXqWdS(sœAcquire the lock file. :raises errors.LockError: if lock is already held :raises OSError: if unable to open or stat the lock file i€N( R R RtopenR tO_CREATtO_WRONLYt _try_lockt _lock_successtclose(R tfd((s0/usr/lib/python2.7/dist-packages/certbot/lock.pyR 3s" cCs{ytj|tjtjBƒWnVtk rv}|jtjtjfkrptj d|j ƒt j dƒ‚n‚nXdS(s{Try to acquire the lock file without blocking. :param int fd: file descriptor of the opened file to lock s(A lock on %s is held by another process.s/Another instance of Certbot is already running.N( tfcntltlockftLOCK_EXtLOCK_NBtIOErrorterrnotEACCEStEAGAINtloggertdebugR Rt LockError(R Rterr((s0/usr/lib/python2.7/dist-packages/certbot/lock.pyRFs  cCsvytj|jƒ}Wn,tk rD}|jtjkr>tS‚nXtj|ƒ}|j|jkou|j |j kS(s“Did we successfully grab the lock? Because this class deletes the locked file when the lock is released, it is possible another process removed and recreated the file between us opening the file and acquiring the lock. :param int fd: file descriptor of the opened file to lock :returns: True if the lock was successfully acquired :rtype: bool ( RtstatR tOSErrorRtENOENTtFalsetfstattst_devtst_ino(R Rtstat1R tstat2((s0/usr/lib/python2.7/dist-packages/certbot/lock.pyRVs cCsEdj|jj|jƒ}|jdkr7|d7}n |d7}|S(Ns {0}({1}) s acquired>(tformatt __class__t__name__R R R (R trepr_str((s0/usr/lib/python2.7/dist-packages/certbot/lock.pyt__repr__os   cCs=ztj|jƒWdztj|jƒWdd|_XXdS(s)Remove, close, and release the lock file.N(RtremoveR RR R (R ((s0/usr/lib/python2.7/dist-packages/certbot/lock.pytreleasews ( R,t __module__t__doc__RR RRR.R0(((s0/usr/lib/python2.7/dist-packages/certbot/lock.pyRs     ( R2RRtloggingRtcertbotRt getLoggerR,RRtobjectR(((s0/usr/lib/python2.7/dist-packages/certbot/lock.pyts