def acquire(self):
"""Acquire the lock"""
open_mode = os.O_RDWR | os.O_CREAT | os.O_TRUNC
fd = None
try:
# Under Windows, filesystem.open will raise directly an EACCES error
# if the lock file is already locked.
fd = filesystem.open(self._path, open_mode, 0o600)
# The need for this "type: ignore" was fixed in
# https://github.com/python/typeshed/pull/3607 and included in
# newer versions of mypy so it can be removed when mypy is
# upgraded.
msvcrt.locking(fd, msvcrt.LK_NBLCK, 1) # type: ignore
except (IOError, OSError) as err:
if fd:
os.close(fd)
# Anything except EACCES is unexpected. Raise directly the error in that case.
if err.errno != errno.EACCES:
raise
logger.debug('A lock on %s is held by another process.',
self._path)
raise errors.LockError(
'Another instance of Certbot is already running.')
self._fd = fd
def acquire(self):
"""Acquire the lock"""
open_mode = os.O_RDWR | os.O_CREAT | os.O_TRUNC
fd = None
try:
# Under Windows, filesystem.open will raise directly an EACCES error
# if the lock file is already locked.
fd = filesystem.open(self._path, open_mode, 0o600)
# This "type: ignore" is currently needed because msvcrt methods
# are only defined on Windows. See
# https://github.com/python/typeshed/blob/16ae4c61201cd8b96b8b22cdfb2ab9e89ba5bcf2/stdlib/msvcrt.pyi.
msvcrt.locking(fd, msvcrt.LK_NBLCK, 1) # type: ignore
except (IOError, OSError) as err:
if fd:
os.close(fd)
# Anything except EACCES is unexpected. Raise directly the error in that case.
if err.errno != errno.EACCES:
raise
logger.debug('A lock on %s is held by another process.',
self._path)
raise errors.LockError(
'Another instance of Certbot is already running.')
self._fd = fd
def _try_lock(self, fd):
# type: (int) -> None
"""
Try to acquire the lock file without blocking.
:param int fd: file descriptor of the opened file to lock
"""
try:
fcntl.lockf(fd, fcntl.LOCK_EX | fcntl.LOCK_NB)
except IOError as err:
if err.errno in (errno.EACCES, errno.EAGAIN):
logger.debug('A lock on %s is held by another process.', self._path)
raise errors.LockError('Another instance of Certbot is already running.')
raise
def _try_lock(self, fd):
"""Try to acquire the lock file without blocking.
:param int fd: file descriptor of the opened file to lock
"""
try:
compat.lock_file(fd)
except IOError as err:
if err.errno in (errno.EACCES, errno.EAGAIN):
logger.debug("A lock on %s is held by another process.",
self._path)
raise errors.LockError(
"Another instance of Certbot is already running.")
raise
def acquire(self):
"""Acquire the lock"""
open_mode = os.O_RDWR | os.O_CREAT | os.O_TRUNC
fd = os.open(self._path, open_mode, 0o600)
try:
msvcrt.locking(fd, msvcrt.LK_NBLCK, 1)
except (IOError, OSError) as err:
os.close(fd)
# Anything except EACCES is unexpected. Raise directly the error in that case.
if err.errno != errno.EACCES:
raise
logger.debug('A lock on %s is held by another process.',
self._path)
raise errors.LockError(
'Another instance of Certbot is already running.')
self._fd = fd