def update_inode_table(self, table_inode, inode_number):
if table_inode:
table_inode.time_modified = datetime.datetime.now(
) #TIME OF MODIFICATION
array_inode = InodeOps.InodeOperations().convert_table_to_array(
table_inode)
MemoryInterface.update_inode_table(array_inode, inode_number)
def INODE_NUMBER_TO_INODE(self, inode_number):
array_inode = MemoryInterface.inode_number_to_inode(inode_number)
inode = InodeOps.InodeOperations().convert_array_to_table(array_inode)
if inode:
inode.time_accessed = str(
datetime.datetime.now())[:19] #TIME OF ACCESS
return inode
def unlink(self, inode_number, parent_inode_number):
'''WRITE YOUR CODE HERE'''
error = -1
inode = self.INODE_NUMBER_TO_INODE(inode_number)
if(inode == False):
return error
parent_inode = self.INODE_NUMBER_TO_INODE(parent_inode_number)
if(parent_inode == False):
return error
#unlinking dir, make sure it is empty, dir inode can only be deleted if its empty
if inode.type == 1 and len(inode.directory) != 0:
print("ERROR: cant unlink non empty directory")
return error
#if the file is an inode decrement its links
if inode.type == 0:
inode.links -=1
if(inode.links == 0):
interface.free_data_block(inode,0)
MemoryInterface.update_inode_table(False, inode_number)
return parent_inode
if inode.type == 1:
interface.free_data_block(inode,0)
MemoryInterface.update_inode_table(False, inode_number)
return parent_inode
array_inode = InodeOps.InodeOperations().convert_table_to_array(inode)
MemoryInterface.update_inode_table(array_inode, inode_number)
return parent_inode
def INODE_NUMBER_TO_INODE(self, inode_number):
array_inode = ClientStub.ClientStub().inode_number_to_inode(
inode_number)
inode = InodeOps.InodeOperations().convert_array_to_table(array_inode)
if inode:
inode.time_accessed = datetime.datetime.now() #TIME OF ACCESS
return inode
def INODE_NUMBER_TO_INODE(self, inode_number):
#print(inode_number)
array_inode = MemoryInterface.inode_number_to_inode(inode_number)
#print("###############")
#print(array_inode)
inode = InodeOps.InodeOperations().convert_array_to_table(array_inode)
#print(inode)
if inode: inode.time_accessed = datetime.datetime.now() #TIME OF ACCESS
return inode