diff options
Diffstat (limited to 'external_libs/python/lockfile-0.10.2/lockfile')
6 files changed, 0 insertions, 899 deletions
diff --git a/external_libs/python/lockfile-0.10.2/lockfile/__init__.py b/external_libs/python/lockfile-0.10.2/lockfile/__init__.py deleted file mode 100644 index d905af96..00000000 --- a/external_libs/python/lockfile-0.10.2/lockfile/__init__.py +++ /dev/null @@ -1,326 +0,0 @@ -""" -lockfile.py - Platform-independent advisory file locks. - -Requires Python 2.5 unless you apply 2.4.diff -Locking is done on a per-thread basis instead of a per-process basis. - -Usage: - ->>> lock = LockFile('somefile') ->>> try: -... lock.acquire() -... except AlreadyLocked: -... print 'somefile', 'is locked already.' -... except LockFailed: -... print 'somefile', 'can\\'t be locked.' -... else: -... print 'got lock' -got lock ->>> print lock.is_locked() -True ->>> lock.release() - ->>> lock = LockFile('somefile') ->>> print lock.is_locked() -False ->>> with lock: -... print lock.is_locked() -True ->>> print lock.is_locked() -False - ->>> lock = LockFile('somefile') ->>> # It is okay to lock twice from the same thread... ->>> with lock: -... lock.acquire() -... ->>> # Though no counter is kept, so you can't unlock multiple times... ->>> print lock.is_locked() -False - -Exceptions: - - Error - base class for other exceptions - LockError - base class for all locking exceptions - AlreadyLocked - Another thread or process already holds the lock - LockFailed - Lock failed for some other reason - UnlockError - base class for all unlocking exceptions - AlreadyUnlocked - File was not locked. - NotMyLock - File was locked but not by the current thread/process -""" - -from __future__ import absolute_import - -import sys -import socket -import os -import threading -import time -import urllib -import warnings -import functools - -# Work with PEP8 and non-PEP8 versions of threading module. -if not hasattr(threading, "current_thread"): - threading.current_thread = threading.currentThread -if not hasattr(threading.Thread, "get_name"): - threading.Thread.get_name = threading.Thread.getName - -__all__ = ['Error', 'LockError', 'LockTimeout', 'AlreadyLocked', - 'LockFailed', 'UnlockError', 'NotLocked', 'NotMyLock', - 'LinkLockFile', 'MkdirLockFile', 'SQLiteLockFile', - 'LockBase', 'locked'] - -class Error(Exception): - """ - Base class for other exceptions. - - >>> try: - ... raise Error - ... except Exception: - ... pass - """ - pass - -class LockError(Error): - """ - Base class for error arising from attempts to acquire the lock. - - >>> try: - ... raise LockError - ... except Error: - ... pass - """ - pass - -class LockTimeout(LockError): - """Raised when lock creation fails within a user-defined period of time. - - >>> try: - ... raise LockTimeout - ... except LockError: - ... pass - """ - pass - -class AlreadyLocked(LockError): - """Some other thread/process is locking the file. - - >>> try: - ... raise AlreadyLocked - ... except LockError: - ... pass - """ - pass - -class LockFailed(LockError): - """Lock file creation failed for some other reason. - - >>> try: - ... raise LockFailed - ... except LockError: - ... pass - """ - pass - -class UnlockError(Error): - """ - Base class for errors arising from attempts to release the lock. - - >>> try: - ... raise UnlockError - ... except Error: - ... pass - """ - pass - -class NotLocked(UnlockError): - """Raised when an attempt is made to unlock an unlocked file. - - >>> try: - ... raise NotLocked - ... except UnlockError: - ... pass - """ - pass - -class NotMyLock(UnlockError): - """Raised when an attempt is made to unlock a file someone else locked. - - >>> try: - ... raise NotMyLock - ... except UnlockError: - ... pass - """ - pass - -class LockBase: - """Base class for platform-specific lock classes.""" - def __init__(self, path, threaded=True, timeout=None): - """ - >>> lock = LockBase('somefile') - >>> lock = LockBase('somefile', threaded=False) - """ - self.path = path - self.lock_file = os.path.abspath(path) + ".lock" - self.hostname = socket.gethostname() - self.pid = os.getpid() - if threaded: - t = threading.current_thread() - # Thread objects in Python 2.4 and earlier do not have ident - # attrs. Worm around that. - ident = getattr(t, "ident", hash(t)) - self.tname = "-%x" % (ident & 0xffffffff) - else: - self.tname = "" - dirname = os.path.dirname(self.lock_file) - - # unique name is mostly about the current process, but must - # also contain the path -- otherwise, two adjacent locked - # files conflict (one file gets locked, creating lock-file and - # unique file, the other one gets locked, creating lock-file - # and overwriting the already existing lock-file, then one - # gets unlocked, deleting both lock-file and unique file, - # finally the last lock errors out upon releasing. - self.unique_name = os.path.join(dirname, - "%s%s.%s%s" % (self.hostname, - self.tname, - self.pid, - hash(self.path))) - self.timeout = timeout - - def acquire(self, timeout=None): - """ - Acquire the lock. - - * If timeout is omitted (or None), wait forever trying to lock the - file. - - * If timeout > 0, try to acquire the lock for that many seconds. If - the lock period expires and the file is still locked, raise - LockTimeout. - - * If timeout <= 0, raise AlreadyLocked immediately if the file is - already locked. - """ - raise NotImplemented("implement in subclass") - - def release(self): - """ - Release the lock. - - If the file is not locked, raise NotLocked. - """ - raise NotImplemented("implement in subclass") - - def is_locked(self): - """ - Tell whether or not the file is locked. - """ - raise NotImplemented("implement in subclass") - - def i_am_locking(self): - """ - Return True if this object is locking the file. - """ - raise NotImplemented("implement in subclass") - - def break_lock(self): - """ - Remove a lock. Useful if a locking thread failed to unlock. - """ - raise NotImplemented("implement in subclass") - - def __enter__(self): - """ - Context manager support. - """ - self.acquire() - return self - - def __exit__(self, *_exc): - """ - Context manager support. - """ - self.release() - - def __repr__(self): - return "<%s: %r -- %r>" % (self.__class__.__name__, self.unique_name, - self.path) - -def _fl_helper(cls, mod, *args, **kwds): - warnings.warn("Import from %s module instead of lockfile package" % mod, - DeprecationWarning, stacklevel=2) - # This is a bit funky, but it's only for awhile. The way the unit tests - # are constructed this function winds up as an unbound method, so it - # actually takes three args, not two. We want to toss out self. - if not isinstance(args[0], str): - # We are testing, avoid the first arg - args = args[1:] - if len(args) == 1 and not kwds: - kwds["threaded"] = True - return cls(*args, **kwds) - -def LinkFileLock(*args, **kwds): - """Factory function provided for backwards compatibility. - - Do not use in new code. Instead, import LinkLockFile from the - lockfile.linklockfile module. - """ - from . import linklockfile - return _fl_helper(linklockfile.LinkLockFile, "lockfile.linklockfile", - *args, **kwds) - -def MkdirFileLock(*args, **kwds): - """Factory function provided for backwards compatibility. - - Do not use in new code. Instead, import MkdirLockFile from the - lockfile.mkdirlockfile module. - """ - from . import mkdirlockfile - return _fl_helper(mkdirlockfile.MkdirLockFile, "lockfile.mkdirlockfile", - *args, **kwds) - -def SQLiteFileLock(*args, **kwds): - """Factory function provided for backwards compatibility. - - Do not use in new code. Instead, import SQLiteLockFile from the - lockfile.mkdirlockfile module. - """ - from . import sqlitelockfile - return _fl_helper(sqlitelockfile.SQLiteLockFile, "lockfile.sqlitelockfile", - *args, **kwds) - -def locked(path, timeout=None): - """Decorator which enables locks for decorated function. - - Arguments: - - path: path for lockfile. - - timeout (optional): Timeout for acquiring lock. - - Usage: - @locked('/var/run/myname', timeout=0) - def myname(...): - ... - """ - def decor(func): - @functools.wraps(func) - def wrapper(*args, **kwargs): - lock = FileLock(path, timeout=timeout) - lock.acquire() - try: - return func(*args, **kwargs) - finally: - lock.release() - return wrapper - return decor - -if hasattr(os, "link"): - from . import linklockfile as _llf - LockFile = _llf.LinkLockFile -else: - from . import mkdirlockfile as _mlf - LockFile = _mlf.MkdirLockFile - -FileLock = LockFile - diff --git a/external_libs/python/lockfile-0.10.2/lockfile/linklockfile.py b/external_libs/python/lockfile-0.10.2/lockfile/linklockfile.py deleted file mode 100644 index 9c506734..00000000 --- a/external_libs/python/lockfile-0.10.2/lockfile/linklockfile.py +++ /dev/null @@ -1,73 +0,0 @@ -from __future__ import absolute_import - -import time -import os - -from . import (LockBase, LockFailed, NotLocked, NotMyLock, LockTimeout, - AlreadyLocked) - -class LinkLockFile(LockBase): - """Lock access to a file using atomic property of link(2). - - >>> lock = LinkLockFile('somefile') - >>> lock = LinkLockFile('somefile', threaded=False) - """ - - def acquire(self, timeout=None): - try: - open(self.unique_name, "wb").close() - except IOError: - raise LockFailed("failed to create %s" % self.unique_name) - - timeout = timeout is not None and timeout or self.timeout - end_time = time.time() - if timeout is not None and timeout > 0: - end_time += timeout - - while True: - # Try and create a hard link to it. - try: - os.link(self.unique_name, self.lock_file) - except OSError: - # Link creation failed. Maybe we've double-locked? - nlinks = os.stat(self.unique_name).st_nlink - if nlinks == 2: - # The original link plus the one I created == 2. We're - # good to go. - return - else: - # Otherwise the lock creation failed. - if timeout is not None and time.time() > end_time: - os.unlink(self.unique_name) - if timeout > 0: - raise LockTimeout("Timeout waiting to acquire" - " lock for %s" % - self.path) - else: - raise AlreadyLocked("%s is already locked" % - self.path) - time.sleep(timeout is not None and timeout/10 or 0.1) - else: - # Link creation succeeded. We're good to go. - return - - def release(self): - if not self.is_locked(): - raise NotLocked("%s is not locked" % self.path) - elif not os.path.exists(self.unique_name): - raise NotMyLock("%s is locked, but not by me" % self.path) - os.unlink(self.unique_name) - os.unlink(self.lock_file) - - def is_locked(self): - return os.path.exists(self.lock_file) - - def i_am_locking(self): - return (self.is_locked() and - os.path.exists(self.unique_name) and - os.stat(self.unique_name).st_nlink == 2) - - def break_lock(self): - if os.path.exists(self.lock_file): - os.unlink(self.lock_file) - diff --git a/external_libs/python/lockfile-0.10.2/lockfile/mkdirlockfile.py b/external_libs/python/lockfile-0.10.2/lockfile/mkdirlockfile.py deleted file mode 100644 index 8d2c801f..00000000 --- a/external_libs/python/lockfile-0.10.2/lockfile/mkdirlockfile.py +++ /dev/null @@ -1,83 +0,0 @@ -from __future__ import absolute_import, division - -import time -import os -import sys -import errno - -from . import (LockBase, LockFailed, NotLocked, NotMyLock, LockTimeout, - AlreadyLocked) - -class MkdirLockFile(LockBase): - """Lock file by creating a directory.""" - def __init__(self, path, threaded=True, timeout=None): - """ - >>> lock = MkdirLockFile('somefile') - >>> lock = MkdirLockFile('somefile', threaded=False) - """ - LockBase.__init__(self, path, threaded, timeout) - # Lock file itself is a directory. Place the unique file name into - # it. - self.unique_name = os.path.join(self.lock_file, - "%s.%s%s" % (self.hostname, - self.tname, - self.pid)) - - def acquire(self, timeout=None): - timeout = timeout is not None and timeout or self.timeout - end_time = time.time() - if timeout is not None and timeout > 0: - end_time += timeout - - if timeout is None: - wait = 0.1 - else: - wait = max(0, timeout / 10) - - while True: - try: - os.mkdir(self.lock_file) - except OSError: - err = sys.exc_info()[1] - if err.errno == errno.EEXIST: - # Already locked. - if os.path.exists(self.unique_name): - # Already locked by me. - return - if timeout is not None and time.time() > end_time: - if timeout > 0: - raise LockTimeout("Timeout waiting to acquire" - " lock for %s" % - self.path) - else: - # Someone else has the lock. - raise AlreadyLocked("%s is already locked" % - self.path) - time.sleep(wait) - else: - # Couldn't create the lock for some other reason - raise LockFailed("failed to create %s" % self.lock_file) - else: - open(self.unique_name, "wb").close() - return - - def release(self): - if not self.is_locked(): - raise NotLocked("%s is not locked" % self.path) - elif not os.path.exists(self.unique_name): - raise NotMyLock("%s is locked, but not by me" % self.path) - os.unlink(self.unique_name) - os.rmdir(self.lock_file) - - def is_locked(self): - return os.path.exists(self.lock_file) - - def i_am_locking(self): - return (self.is_locked() and - os.path.exists(self.unique_name)) - - def break_lock(self): - if os.path.exists(self.lock_file): - for name in os.listdir(self.lock_file): - os.unlink(os.path.join(self.lock_file, name)) - os.rmdir(self.lock_file) diff --git a/external_libs/python/lockfile-0.10.2/lockfile/pidlockfile.py b/external_libs/python/lockfile-0.10.2/lockfile/pidlockfile.py deleted file mode 100644 index e92f9ead..00000000 --- a/external_libs/python/lockfile-0.10.2/lockfile/pidlockfile.py +++ /dev/null @@ -1,193 +0,0 @@ -# -*- coding: utf-8 -*- - -# pidlockfile.py -# -# Copyright © 2008–2009 Ben Finney <ben+python@benfinney.id.au> -# -# This is free software: you may copy, modify, and/or distribute this work -# under the terms of the Python Software Foundation License, version 2 or -# later as published by the Python Software Foundation. -# No warranty expressed or implied. See the file LICENSE.PSF-2 for details. - -""" Lockfile behaviour implemented via Unix PID files. - """ - -from __future__ import absolute_import - -import os -import sys -import errno -import time - -from . import (LockBase, AlreadyLocked, LockFailed, NotLocked, NotMyLock, - LockTimeout) - - -class PIDLockFile(LockBase): - """ Lockfile implemented as a Unix PID file. - - The lock file is a normal file named by the attribute `path`. - A lock's PID file contains a single line of text, containing - the process ID (PID) of the process that acquired the lock. - - >>> lock = PIDLockFile('somefile') - >>> lock = PIDLockFile('somefile') - """ - - def __init__(self, path, threaded=False, timeout=None): - # pid lockfiles don't support threaded operation, so always force - # False as the threaded arg. - LockBase.__init__(self, path, False, timeout) - dirname = os.path.dirname(self.lock_file) - basename = os.path.split(self.path)[-1] - self.unique_name = self.path - - def read_pid(self): - """ Get the PID from the lock file. - """ - return read_pid_from_pidfile(self.path) - - def is_locked(self): - """ Test if the lock is currently held. - - The lock is held if the PID file for this lock exists. - - """ - return os.path.exists(self.path) - - def i_am_locking(self): - """ Test if the lock is held by the current process. - - Returns ``True`` if the current process ID matches the - number stored in the PID file. - """ - return self.is_locked() and os.getpid() == self.read_pid() - - def acquire(self, timeout=None): - """ Acquire the lock. - - Creates the PID file for this lock, or raises an error if - the lock could not be acquired. - """ - - timeout = timeout is not None and timeout or self.timeout - end_time = time.time() - if timeout is not None and timeout > 0: - end_time += timeout - - while True: - try: - write_pid_to_pidfile(self.path) - except OSError as exc: - if exc.errno == errno.EEXIST: - # The lock creation failed. Maybe sleep a bit. - if timeout is not None and time.time() > end_time: - if timeout > 0: - raise LockTimeout("Timeout waiting to acquire" - " lock for %s" % - self.path) - else: - raise AlreadyLocked("%s is already locked" % - self.path) - time.sleep(timeout is not None and timeout/10 or 0.1) - else: - raise LockFailed("failed to create %s" % self.path) - else: - return - - def release(self): - """ Release the lock. - - Removes the PID file to release the lock, or raises an - error if the current process does not hold the lock. - - """ - if not self.is_locked(): - raise NotLocked("%s is not locked" % self.path) - if not self.i_am_locking(): - raise NotMyLock("%s is locked, but not by me" % self.path) - remove_existing_pidfile(self.path) - - def break_lock(self): - """ Break an existing lock. - - Removes the PID file if it already exists, otherwise does - nothing. - - """ - remove_existing_pidfile(self.path) - -def read_pid_from_pidfile(pidfile_path): - """ Read the PID recorded in the named PID file. - - Read and return the numeric PID recorded as text in the named - PID file. If the PID file cannot be read, or if the content is - not a valid PID, return ``None``. - - """ - pid = None - try: - pidfile = open(pidfile_path, 'r') - except IOError: - pass - else: - # According to the FHS 2.3 section on PID files in /var/run: - # - # The file must consist of the process identifier in - # ASCII-encoded decimal, followed by a newline character. - # - # Programs that read PID files should be somewhat flexible - # in what they accept; i.e., they should ignore extra - # whitespace, leading zeroes, absence of the trailing - # newline, or additional lines in the PID file. - - line = pidfile.readline().strip() - try: - pid = int(line) - except ValueError: - pass - pidfile.close() - - return pid - - -def write_pid_to_pidfile(pidfile_path): - """ Write the PID in the named PID file. - - Get the numeric process ID (“PID”) of the current process - and write it to the named file as a line of text. - - """ - open_flags = (os.O_CREAT | os.O_EXCL | os.O_WRONLY) - open_mode = 0o644 - pidfile_fd = os.open(pidfile_path, open_flags, open_mode) - pidfile = os.fdopen(pidfile_fd, 'w') - - # According to the FHS 2.3 section on PID files in /var/run: - # - # The file must consist of the process identifier in - # ASCII-encoded decimal, followed by a newline character. For - # example, if crond was process number 25, /var/run/crond.pid - # would contain three characters: two, five, and newline. - - pid = os.getpid() - line = "%(pid)d\n" % vars() - pidfile.write(line) - pidfile.close() - - -def remove_existing_pidfile(pidfile_path): - """ Remove the named PID file if it exists. - - Removing a PID file that doesn't already exist puts us in the - desired state, so we ignore the condition if the file does not - exist. - - """ - try: - os.remove(pidfile_path) - except OSError as exc: - if exc.errno == errno.ENOENT: - pass - else: - raise diff --git a/external_libs/python/lockfile-0.10.2/lockfile/sqlitelockfile.py b/external_libs/python/lockfile-0.10.2/lockfile/sqlitelockfile.py deleted file mode 100644 index 7dee4a85..00000000 --- a/external_libs/python/lockfile-0.10.2/lockfile/sqlitelockfile.py +++ /dev/null @@ -1,155 +0,0 @@ -from __future__ import absolute_import, division - -import time -import os - -try: - unicode -except NameError: - unicode = str - -from . import LockBase, NotLocked, NotMyLock, LockTimeout, AlreadyLocked - -class SQLiteLockFile(LockBase): - "Demonstrate SQL-based locking." - - testdb = None - - def __init__(self, path, threaded=True, timeout=None): - """ - >>> lock = SQLiteLockFile('somefile') - >>> lock = SQLiteLockFile('somefile', threaded=False) - """ - LockBase.__init__(self, path, threaded, timeout) - self.lock_file = unicode(self.lock_file) - self.unique_name = unicode(self.unique_name) - - if SQLiteLockFile.testdb is None: - import tempfile - _fd, testdb = tempfile.mkstemp() - os.close(_fd) - os.unlink(testdb) - del _fd, tempfile - SQLiteLockFile.testdb = testdb - - import sqlite3 - self.connection = sqlite3.connect(SQLiteLockFile.testdb) - - c = self.connection.cursor() - try: - c.execute("create table locks" - "(" - " lock_file varchar(32)," - " unique_name varchar(32)" - ")") - except sqlite3.OperationalError: - pass - else: - self.connection.commit() - import atexit - atexit.register(os.unlink, SQLiteLockFile.testdb) - - def acquire(self, timeout=None): - timeout = timeout is not None and timeout or self.timeout - end_time = time.time() - if timeout is not None and timeout > 0: - end_time += timeout - - if timeout is None: - wait = 0.1 - elif timeout <= 0: - wait = 0 - else: - wait = timeout / 10 - - cursor = self.connection.cursor() - - while True: - if not self.is_locked(): - # Not locked. Try to lock it. - cursor.execute("insert into locks" - " (lock_file, unique_name)" - " values" - " (?, ?)", - (self.lock_file, self.unique_name)) - self.connection.commit() - - # Check to see if we are the only lock holder. - cursor.execute("select * from locks" - " where unique_name = ?", - (self.unique_name,)) - rows = cursor.fetchall() - if len(rows) > 1: - # Nope. Someone else got there. Remove our lock. - cursor.execute("delete from locks" - " where unique_name = ?", - (self.unique_name,)) - self.connection.commit() - else: - # Yup. We're done, so go home. - return - else: - # Check to see if we are the only lock holder. - cursor.execute("select * from locks" - " where unique_name = ?", - (self.unique_name,)) - rows = cursor.fetchall() - if len(rows) == 1: - # We're the locker, so go home. - return - - # Maybe we should wait a bit longer. - if timeout is not None and time.time() > end_time: - if timeout > 0: - # No more waiting. - raise LockTimeout("Timeout waiting to acquire" - " lock for %s" % - self.path) - else: - # Someone else has the lock and we are impatient.. - raise AlreadyLocked("%s is already locked" % self.path) - - # Well, okay. We'll give it a bit longer. - time.sleep(wait) - - def release(self): - if not self.is_locked(): - raise NotLocked("%s is not locked" % self.path) - if not self.i_am_locking(): - raise NotMyLock("%s is locked, but not by me (by %s)" % - (self.unique_name, self._who_is_locking())) - cursor = self.connection.cursor() - cursor.execute("delete from locks" - " where unique_name = ?", - (self.unique_name,)) - self.connection.commit() - - def _who_is_locking(self): - cursor = self.connection.cursor() - cursor.execute("select unique_name from locks" - " where lock_file = ?", - (self.lock_file,)) - return cursor.fetchone()[0] - - def is_locked(self): - cursor = self.connection.cursor() - cursor.execute("select * from locks" - " where lock_file = ?", - (self.lock_file,)) - rows = cursor.fetchall() - return not not rows - - def i_am_locking(self): - cursor = self.connection.cursor() - cursor.execute("select * from locks" - " where lock_file = ?" - " and unique_name = ?", - (self.lock_file, self.unique_name)) - return not not cursor.fetchall() - - def break_lock(self): - cursor = self.connection.cursor() - cursor.execute("delete from locks" - " where lock_file = ?", - (self.lock_file,)) - self.connection.commit() diff --git a/external_libs/python/lockfile-0.10.2/lockfile/symlinklockfile.py b/external_libs/python/lockfile-0.10.2/lockfile/symlinklockfile.py deleted file mode 100644 index 57551a36..00000000 --- a/external_libs/python/lockfile-0.10.2/lockfile/symlinklockfile.py +++ /dev/null @@ -1,69 +0,0 @@ -from __future__ import absolute_import - -import time -import os - -from . import (LockBase, LockFailed, NotLocked, NotMyLock, LockTimeout, - AlreadyLocked) - -class SymlinkLockFile(LockBase): - """Lock access to a file using symlink(2).""" - - def __init__(self, path, threaded=True, timeout=None): - # super(SymlinkLockFile).__init(...) - LockBase.__init__(self, path, threaded, timeout) - # split it back! - self.unique_name = os.path.split(self.unique_name)[1] - - def acquire(self, timeout=None): - # Hopefully unnecessary for symlink. - #try: - # open(self.unique_name, "wb").close() - #except IOError: - # raise LockFailed("failed to create %s" % self.unique_name) - timeout = timeout is not None and timeout or self.timeout - end_time = time.time() - if timeout is not None and timeout > 0: - end_time += timeout - - while True: - # Try and create a symbolic link to it. - try: - os.symlink(self.unique_name, self.lock_file) - except OSError: - # Link creation failed. Maybe we've double-locked? - if self.i_am_locking(): - # Linked to out unique name. Proceed. - return - else: - # Otherwise the lock creation failed. - if timeout is not None and time.time() > end_time: - if timeout > 0: - raise LockTimeout("Timeout waiting to acquire" - " lock for %s" % - self.path) - else: - raise AlreadyLocked("%s is already locked" % - self.path) - time.sleep(timeout/10 if timeout is not None else 0.1) - else: - # Link creation succeeded. We're good to go. - return - - def release(self): - if not self.is_locked(): - raise NotLocked("%s is not locked" % self.path) - elif not self.i_am_locking(): - raise NotMyLock("%s is locked, but not by me" % self.path) - os.unlink(self.lock_file) - - def is_locked(self): - return os.path.islink(self.lock_file) - - def i_am_locking(self): - return os.path.islink(self.lock_file) and \ - os.readlink(self.lock_file) == self.unique_name - - def break_lock(self): - if os.path.islink(self.lock_file): # exists && link - os.unlink(self.lock_file) |