def open_fsynced(file_name, mode="w", buffering=-1):
"""Context manager that opens `file_name` and will `fsync` it before
closing.
"""
with open(file_name, mode, buffering) as file:
try:
yield file
finally:
file.flush()
sos.fsync(file.fileno())
def open_fsynced (file_name, mode = "w", buffering = -1) :
"""Context manager that opens `file_name` and will `fsync` it before
closing.
"""
with open (file_name, mode, buffering) as file :
try :
yield file
finally :
file.flush ()
sos.fsync (file.fileno ())
def open_to_replace(file_name, mode="w", buffering=-1, backup_name=None):
"""Context manager that opens a file with a temporary name and renames it
to `file_name` after syncing and closing. If `backup_name` is
specified, the old file is renamed to `backup_name`.
"""
dir, name = sos.path.split(file_name)
with open_tempfile (mode, buffering, prefix = name, dir = dir) as \
(file, temp_name) :
yield file
file.flush()
sos.fsync(file.fileno())
file.close()
if backup_name:
try:
sos.rename(file_name, backup_name)
except sos.error as exc:
if exc.args[0] != errno.ENOENT:
import traceback
traceback.print_exc()
sos.rename(temp_name, file_name)
def open_to_replace (file_name, mode = "w", buffering = -1, backup_name = None) :
"""Context manager that opens a file with a temporary name and renames it
to `file_name` after syncing and closing. If `backup_name` is
specified, the old file is renamed to `backup_name`.
"""
dir, name = sos.path.split (file_name)
with open_tempfile (mode, buffering, prefix = name, dir = dir) as \
(file, temp_name) :
yield file
file.flush ()
sos.fsync (file.fileno ())
file.close ()
if backup_name :
try :
sos.rename (file_name, backup_name)
except sos.error as exc :
if exc.args [0] != errno.ENOENT :
import traceback
traceback.print_exc ()
sos.rename (temp_name, file_name)
