def find_inode(self, path):
if path == '/':
return self.root_i
dirs = path.split('/')[1:]
with open(self.disk, 'rb') as f:
# TODO: deal with multiple-blocks directories
next_de_pos = (self.root_i.get_blocks()[0] *
self.sb.get_block_size())
while dirs != []:
f.seek(next_de_pos)
data = f.read(DirEntrySize)
de = DirEntry(data)
if de.get_name_length() == 0:
raise NotFound("File %s not found" % path)
if de.get_name() == dirs[0]:
dirs.pop()
inode_pos = (self.sb.get_block_size() *
self.first_bg.get_inode_table() +
(de.get_inode()-1) * InodeSize)
f.seek(inode_pos)
data = f.read(InodeSize)
i = Inode(data)
if dirs == []: # we found it
return i
if i.is_file():
raise NotFound("%s is a file, not a directory" %
de.get_name())
# TODO
next_de_pos = (i.get_blocks()[0] *
self.sb.get_block_size())
next_de_pos += de.get_length()
raise NotFound("Invalid path: %s" % path)
def readdir(self, path, offset):
inode = self.find_inode(path)
with open(self.disk, 'rb') as f:
next_de_pos = (inode.get_blocks()[0] *
self.sb.get_block_size())
while True:
f.seek(next_de_pos)
data = f.read(DirEntrySize)
de = DirEntry(data)
if de.get_name_length() == 0:
break
yield fuse.Direntry(de.get_name())
next_de_pos += de.get_length()
return