def __init__(self): # initialize metadata self.metadata = Metadata() # file descriptor dictionary self.fd_init = 10 self.fd_dict = dict() self.fd_buff = dict()
class Grifone(Operations):
def __init__(self):
# initialize metadata
self.metadata = Metadata()
# file descriptor dictionary
self.fd_init = 10
self.fd_dict = dict()
self.fd_buff = dict()
# +===============================================
# | Filesystem method
# +===============================================
def access(self, path, mode):
node = self.metadata.getNode(path)
if node == None:
raise FuseOSError(errno.EACCES)
return 0
def chmod(self, path, mode):
print "CHMOD: (path=%s, mode=%s)" %(path, mode)
raise FuseOSError(errno.EACCES)
def chown(self, path, uid, gid):
print "CHOWN: (path=%s, uid=%s, gid=%s)" %(path, uid, gid)
if self.metadata.change_ownership(path, uid, gid) == False:
raise FuseOSError(errno.ENOENT)
return 0
def getattr(self, path, fh=None):
print "GETATTR: (path=%s, fh=%s)" %(path, fh)
node = self.metadata.getNode(path)
if node == None:
# No such file or directory
raise FuseOSError(errno.ENOENT)
return self.metadata.stat(node)
def readdir(self, path, fh):
print "READDIR: (path=%s, fh=%s)" %(path, fh)
lists = self.metadata.getChildNodes(path)
lists.append('.')
lists.append('..')
return lists
def readlink(self, path):
print "READLINK: (path=%s)" %(path, fh)
raise FuseOSError(errno.EACCES)
def mknod(self, path, mode, dev):
print "MKNOD: (path=%s, mode=%s, dev=%s)" %(path, mode, dev)
raise FuseOSError(errno.EACCES)
def mkdir(self, path, mode):
print "MKDIR: (path=%s, mode=%s)" %(path, mode)
basepath, name = os.path.split(path)
node = self.metadata.getNode(path)
if node != None:
raise FuseOSError(errno.EACCES)
self.metadata.make_directory(basepath, name)
def rmdir(self, path):
print "RMDIR: (path=%s)" %(path)
basepath, name = os.path.split(path)
self.metadata.remove_directory(basepath, name)
def statfs(self, path):
print "STATFS: (path=%s)" %(path)
raise FuseOSError(errno.EACCES)
def unlink(self, path):
print "UNLINK: (path=%s)" %(path)
basepath, name = os.path.split(path)
self.metadata.remove_file(basepath, name)
def symlink(self, target, source):
print "SYMLINK: (target=%s, source=%s)" %(target, source)
raise FuseOSError(errno.EACCES)
def rename(self, old, new):
print "SYMLINK: (old=%s, new=%s)" %(old, new)
raise FuseOSError(errno.EACCES)
def link(self, target, source):
print "LINK: (target=%s, source=%s)" %(target, source)
raise FuseOSError(errno.EACCES)
def utimens(self, path, times=None):
print "UTIMES: (path=%s, times=%s)" %(path, times)
self.metadata.update_times(path, times)
return 0
# +===============================================
# | File method
# +===============================================
def open(self, path, flags, mode=None):
print "OPEN: (path=%s, flags=%s)" %(path, flags)
basepath, name = os.path.split(path)
if flags & os.O_CREAT:
self.metadata.make_file(basepath, name)
# file descriptor process
for i in range(self.fd_init, 4096):
new_fd = self.fd_dict.get(i)
if new_fd == None:
self.fd_dict[i] = path
return i
raise FuseOSError(errno.EACCES)
def create(self, path, mode):
print "CREATE: (path=%s, mode=%s)" %(path, mode)
return self.open(path, os.O_WRONLY | os.O_CREAT, mode)
def read(self, path, size, offset, fh):
print "READ: (path=%s, size=%s, offset=%s, fh=%s)" %(path, size, offset, fh)
datas = self.fd_buff.get(path)
if datas:
if len(datas) < size:
size = len(datas)
return str(datas[offset:offset + size])
return ''
def write(self, path, data, offset, fh):
print "WRITE: (path=%s, offset=%s, fh=%s)" %(path, offset, fh)
datas = self.fd_buff.get(path)
if datas == None:
datas = self.fd_buff[path] = bytearray()
datas[offset:] = data[:]
size = len(data)
filesize = len(datas)
self.metadata.update_size(path, filesize)
return size
def truncate(self, path, length, fh=None):
print "TRUNCATE: (path=%s, length=%s, fh=%s)" %(path, length, fh)
def flush(self, path, fh):
print "FLUSH: (path=%s, fh=%s)" %(path, fh)
def release(self, path, fh):
print "RELEASE: (path=%s, fh=%s)" %(path, fh)
def fsync(self, path, datasync, fh):
print "FSYNC: (path=%s, datasync=%s, fh=%s)" %(path, datasync, fh)