def mkdir(self, path, mode):
self.files[path] = dict(st_mode=(S_IFDIR | mode),
st_nlink=2,
st_size=0,
st_ctime=time(),
st_mtime=time(),
st_atime=time())
name = path
mode = self.files[path].get('st_mode')
ctime = self.files[path].get('st_ctime')
mtime = self.files[path].get('st_mtime')
atime = self.files[path].get('st_atime')
nlink = self.files[path].get('st_nlink')
size = self.files[path].get('st_size')
uid = os.getuid()
gid = os.getgid()
self.chown(path, uid, gid)
# get free block for the new created file to save the metadata.
num_array = Format.get_free_block(Format, 1)
block_num = num_array[0]
# set up the location in the disk
inode_data = Format.set_inode(Format, name, mode, ctime, mtime, atime,
nlink, uid, gid, size, block_num)
disktools.write_block(block_num, inode_data)
# update the free block bitmap
Format.update_bit_map(Format, num_array)
# find the parent path and add the nlink by 1.
parent_path = Format.find_parent_path(Format, path)
self.files[parent_path]['st_nlink'] += 1
Format.update_nlink(Format, parent_path, 1)
def rmdir(self, path):
# with multiple level support, need to raise ENOTEMPTY if contains any files
length = len(path)
flag = True
for x in self.files:
# if the first part is equal to path and the total length is longer than path
# which mean it inside the path.
if (x[0:length] == path) & (len(x) > length):
flag = False
if flag:
self.files.pop(path)
Format.clear_metadata_block(Format, path)
else:
raise ENOTEMPTY
# find the parent path and reduce the nlink by 1.
parent_path = Format.find_parent_path(Format, path)
self.files[parent_path]['st_nlink'] -= 1
Format.update_nlink(Format, parent_path, -1)
