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fs.py
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fs.py
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import asyncio
import errno
import threading
from fuse import FUSE, FuseOSError, Operations, LoggingMixIn
from mqtt import MqttWrapper
async def sync(storage, token):
client = MqttWrapper(storage)
storage.set_device(client)
await client.initialize(token)
def main_loop(storage, token):
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
try:
loop.run_until_complete(sync(storage, token))
finally:
loop.close()
class Filesystem(LoggingMixIn, Operations):
def __init__(self, token, storage):
self._storage = storage
self._token = token
self.fd = 0
self.files = {}
self._thread = None
def init(self, path):
self._thread = threading.Thread(target=lambda: main_loop(self._storage, self._token), args=())
self._thread.start()
def destroy(self, path):
self._storage._device.disconnect()
self._thread.join()
def chmod(self, path, mode):
self.files[path]['st_mode'] &= 0o770000
self.files[path]['st_mode'] |= mode
return 0
def chown(self, path, uid, gid):
self.files[path]['st_uid'] = uid
self.files[path]['st_gid'] = gid
def create(self, path, mode):
self._storage.create_file(path, mode)
self.fd += 1
return self.fd
def getattr(self, path, fh=None):
file = self._storage.get(path)
if not file:
raise FuseOSError(errno.ENOENT)
return file.meta
def getxattr(self, path, name, position=0):
file = self._storage.get(path)
if not file:
raise FuseOSError(errno.ENOATTR)
attr = file.meta.attrs.get(name, None)
print(attr)
if not attr:
raise FuseOSError(errno.ENOATTR)
return attr
def listxattr(self, path):
file = self._storage.get(path)
if not file:
return []
return file.meta.attrs.keys()
def mkdir(self, path, mode):
self._storage.create_folder(path, mode)
def open(self, path, flags):
self.fd += 1
return self.fd
def read(self, path, size, offset, fh):
file = self._storage.get(path)
return file.read(offset, size)
def readdir(self, path, fh):
return self._storage.list_dir(path)
def readlink(self, path):
return self.data[path]
def removexattr(self, path, name):
file = self._storage.get(path)
if not file:
return
file.meta.attrs.pop(name, None)
def rename(self, old, new):
self.files[new] = self.files.pop(old)
def rmdir(self, path):
self.files.pop(path)
self.files['/']['st_nlink'] -= 1
def setxattr(self, path, name, value, options, position=0):
# Ignore options
file = self._storage.get(path)
file.meta.attrs[name] = value
def statfs(self, path):
return dict(f_bsize=512, f_blocks=4096 * 1000, f_bavail=2048 * 1000)
def truncate(self, path, length, fh=None):
file = self._storage.get(path)
file.data = file.data[:length]
file.meta.st_size = length
def unlink(self, path):
self.files.pop(path)
def utimens(self, path, times=None):
pass
def write(self, path, data, offset, fh):
file = self._storage.get(path)
nbytes = file.write(data, offset)
topic = 'fs' + path
self._storage._device.publish(topic, file.data)
return nbytes