def change_rem_inode(self, inode_no):
file = open(self.filepath, "r+b")
self.LIL[0] = inode_no
self.clear_inode(inode_no)
write_str_bin(file=file, string=int_to_string(inode_no, 4))
file.close()
return True
def write(self):
file = open(
"/home/zikin/Documents/Final_project_OS/hard_drive/" +
str(self.get_block()) + ".block", "r+b")
offset = self.get_offset()
file.seek(offset)
file.write(bytes([ord(self.owner)]))
file.write(bytes([ord(self.group)]))
file.write(bytes([ord(self.filetype)]))
write_str_bin(file, self.access_permissions)
write_str_bin(file, self.file_access_time)
write_str_bin(file, self.links)
write_str_bin(file, self.size)
write_str_bin(file, self.table_of_contents)
file.close()
return True
def mkdir(name, cwd):
LIL = B.super_block(1)
LIL.load()
LBL = B.super_block(2)
LBL.load()
dir = Inode(id = LIL.free_inode(), filetype='d')
dir.read()
dir.filetype = 'd'
dir.size = 13
dir.table_of_contents[0] = LBL.free_block()
file = open("/home/zikin/Documents/Final_project_OS/hard_drive/" + str(dir.table_of_contents[0]) + ".block", "r+b")
write_str_bin(file,int_to_string(dir.id,4)+'.'+'\n')
write_str_bin(file,int_to_string(cwd.id,4)+'..'+'\n')
dir.binarize_all()
dir.write()
add_file_to_dir(cwd.id,dir.id,name)
def pop(self):
if self.LBL != None:
file = open(self.filepath, "r+b")
num = self.LBL.pop() ##checar
file.seek(len(self.LBL) * 4, 0)
write_str_bin(file=file, string=int_to_string(0, 4))
self.update_info()
file.close()
return num
else:
file = open(self.filepath, "r+b")
num = self.LIL.pop()
file.seek(len(self.LIL) * 4, 0)
write_str_bin(file=file, string=int_to_string(0, 4))
self.update_info()
file.close()
return num
def append(self, num):
if self.LBL != None:
file = open(self.filepath, "r+b")
file.seek(len(self.LBL) * 4, 0)
write_str_bin(file=file, string=int_to_string(num, 4))
self.LBL.append(num)
self.update_info()
file.close()
return True
else:
file = open(self.filepath, "r+b")
file.seek(len(self.LIL) * 4, 0)
self.clear_inode(num)
write_str_bin(file=file, string=int_to_string(num, 4))
self.LIL.append(num)
self.update_info()
return True
def rm_from_dir(dir_name, cwd):
byte_no = find_file(cwd, dir_name)
files = find_files(cwd)
if files.get(dir_name,False):
inode_no = files[dir_name]
else:
return False
block = find_block(byte_no // 1024, cwd.table_of_contents)
file = open("/home/zikin/Documents/Final_project_OS/hard_drive/" + str(block) + ".block", "r+b")
file.seek(byte_no%1024)
bytes = (byte_no % 1024 + len(dir_name) + 1)
if bytes < 1024:
write_str_bin(file, chr(0)*(len(dir_name)+4))
file.close()
else:
write_str_bin(file, chr(0) * (1024- (byte_no%1024)))
file.close()
block = find_block(byte_no // 1024 +1, cwd.table_of_contents)
file = open("/home/zikin/Documents/Final_project_OS/hard_drive/" + str(block) + ".block", "r+b")
write_str_bin(file, chr(0) * (bytes -1023))
file.close()
return int(inode_no)
def mk_file(user, file_content, ref, parent_inode):
LIL = B.super_block(1)
LBL = B.super_block(2)
LIL.load()
LBL.load()
no_inodo = LIL.free_inode()
inodo = Inode(id=no_inodo)
inodo.read()
inodo.filetype = 'x'
inodo.owner = user
inodo.size = len(file_content)
no_blocks = math.ceil(len(file_content) / 1024)
block = 0
while block < no_blocks:
if block < 8:
inodo.table_of_contents[block] = LBL.free_block()
file = open(
"/home/zikin/Documents/Final_project_OS/hard_drive/" +
str(inodo.table_of_contents[block]) + ".block", "r+b")
if (block + 1) * 1024 < len(file_content):
write_str_bin(file,
file_content[block * 1024:(block + 1) * 1024])
else:
write_str_bin(file, file_content[block * 1024:])
file.close()
block += 1
elif block < 264:
inodo.table_of_contents[8] = LBL.free_block()
offset = 0
file_1 = open(
"/home/zikin/Documents/Final_project_OS/hard_drive/" +
str(inodo.table_of_contents[8]) + ".block", "r+b")
while offset < 1024 and block < no_blocks:
offset += 4
no_block = LBL.free_block()
write_str_bin(file_1, int_to_string(no_block, 4))
file_2 = open(
"/home/zikin/Documents/Final_project_OS/hard_drive/" +
str(no_block) + ".block", "r+b")
if (block + 1) * 1024 < len(file_content):
write_str_bin(
file_2, file_content[block * 1024:(block + 1) * 1024])
else:
write_str_bin(file_2, file_content[block * 1024:])
block += 1
file_2.close()
file_1.close()
elif block < 65800:
inodo.table_of_contents[9] = LBL.free_block()
offset_1 = 0
file_1 = open(
"/home/zikin/Documents/Final_project_OS/hard_drive/" +
str(inodo.table_of_contents[9]) + ".block", "r+b")
while offset_1 < 1024 and block < no_blocks:
offset_1 += 4
no_block = LBL.free_block()
write_str_bin(file_1, int_to_string(no_block, 4))
file_2 = open(
"/home/zikin/Documents/Final_project_OS/hard_drive/" +
str(no_block) + ".block", "r+b")
offset_2 = 0
while offset_2 < 1024 and block < no_blocks:
offset_2 += 4
no_block = LBL.free_block()
write_str_bin(file_2, int_to_string(no_block, 4))
file_3 = open(
"/home/zikin/Documents/Final_project_OS/hard_drive/" +
str(no_block) + ".block", "r+b")
if (block + 1) * 1024 < len(file_content):
write_str_bin(
file_3,
file_content[block * 1024:(block + 1) * 1024])
else:
write_str_bin(file_3, file_content[block * 1024:])
block += 1
file_3.close()
file_2.close()
file_1.close()
else:
inodo.table_of_contents[10] = LBL.free_block()
offset_1 = 0
file_1 = open(
"/home/zikin/Documents/Final_project_OS/hard_drive/" +
str(inodo.table_of_contents[10]) + ".block", "r+b")
while offset_1 < 1024 and block < no_blocks:
offset_1 += 4
no_block = LBL.free_block()
write_str_bin(file_1, int_to_string(no_block, 4))
file_2 = open(
"/home/zikin/Documents/Final_project_OS/hard_drive/" +
str(no_block) + ".block", "r+b")
offset_2 = 0
while offset_2 < 1024 and block < no_blocks:
offset_2 += 4
no_block = LBL.free_block()
write_str_bin(file_2, int_to_string(no_block, 4))
file_3 = open(
"/home/zikin/Documents/Final_project_OS/hard_drive/" +
str(no_block) + ".block", "r+b")
offset_3 = 0
while offset_3 < 1024 and block < no_blocks:
offset_3 += 4
no_block = LBL.free_block()
write_str_bin(file_3, int_to_string(no_block, 4))
file_4 = open(
"/home/zikin/Documents/Final_project_OS/hard_drive/"
+ str(no_block) + ".block", "r+b")
if (block + 1) * 1024 < len(file_content):
write_str_bin(
file_4,
file_content[block * 1024:(block + 1) * 1024])
else:
write_str_bin(file_4, file_content[block * 1024:])
block += 1
file_4.close()
file_3.close()
file_2.close()
file_1.close()
inodo.binarize_all()
inodo.write()
add_file_to_dir(i_dir=parent_inode, i_file=inodo.id, name=ref)
return True
def add_file_to_dir(i_dir, i_file,name):
i_dir = Inode(i_dir)
i_dir.read()
i_file = Inode(i_file)
i_file.read()
current_size = i_dir.size
future_size = current_size +4 + 1 + len(name)
block = future_size//1024
if (future_size //1024 == current_size //1024):
offset = current_size % 1024
writing_block = find_block(block, i_dir.table_of_contents)
file = open("/home/zikin/Documents/Final_project_OS/hard_drive/" + str(writing_block) + ".block", "r+b")
file.seek(offset)
write_str_bin(file, int_to_string(i_file.id, 4) + name + "\n")
file.close()
else:
offset = current_size % 1024
writing_block = find_block(block, i_dir.table_of_contents)
file = open("/home/zikin/Documents/Final_project_OS/hard_drive/" + str(writing_block) + ".block", "r+b")
file.seek(offset)
string1 = int_to_string(i_file.id, 4) + name + "\n"[0:1024 - offset]
string2 = int_to_string(i_file.id, 4) + name + "\n"[1024 - offset:]
write_str_bin(file, string1)
file.close()
LBL = B.super_block(2)
LBL.load()
if block < 8:
i_dir.table_of_contents[block] = LBL.free_block()
last_block = i_dir.table_of_contents[block]
if block < 264:
offset_1 = (block - 8) % 256
if offset_1== 0:
i_dir.table_of_contents[8] = LBL.free_block()
file_1 = open("/home/zikin/Documents/Final_project_OS/hard_drive/" + str(i_dir.table_of_contents[8]) + ".block", "r+b")
file_1.seek(offset_1 *4)
new_block = LBL.free_block()
write_str_bin(file_1,int_to_string(new_block,4))
last_block = new_block
file_1.close()
if block < 65800:
offset_1 = (block - 264) % 65536
offset_R1 = (block - 264) // 256
offset_2 = (block - 264) % 256
if offset_1== 0:
i_dir.table_of_contents[9] = LBL.free_block()
file_1 = open("/home/zikin/Documents/Final_project_OS/hard_drive/" + str(i_dir.table_of_contents[9]) + ".block", "r+b")
file_1.seek(offset_R1 *4)
if offset_2 == 0:
new_block = LBL.free_block()
write_str_bin(file_1, int_to_string(new_block, 4))
else:
new_block = string_to_int(bytes_to_string(file_1.read(4)))
file_1.close()
file_2 = open("/home/zikin/Documents/Final_project_OS/hard_drive/" + str(new_block) + ".block", "r+b")
file_2.seek(offset_2 *4)
new_block = LBL.free_block()
write_str_bin(file_2, int_to_string(new_block, 4))
last_block = new_block
file_2.close()
else:
offset_1 = (block - 65800) // 65536
offset_2 = (block - 65800) // 256
offset_3 = (block - 65800) % 256
if block == 65800:
i_dir.table_of_contents[10] = LBL.free_block()
file_1 = open("/home/zikin/Documents/Final_project_OS/hard_drive/" + str(i_dir.table_of_contents[10]) + ".block", "r+b")
file_1.seek(offset_1 *4)
if offset_2 == 0:
new_block = LBL.free_block()
write_str_bin(file_1, int_to_string(new_block, 4))
else:
new_block = string_to_int(bytes_to_string(file_1.read(4)))
file_1.close()
file_2 = open("/home/zikin/Documents/Final_project_OS/hard_drive/" + str(new_block) + ".block", "r+b")
file_2.seek(offset_2 *4)
if offset_3 == 0:
new_block = LBL.free_block()
write_str_bin(file_2, int_to_string(new_block, 4))
else:
new_block = string_to_int(bytes_to_string(file_2.read(4)))
file_2.close()
file_3 = open("/home/zikin/Documents/Final_project_OS/hard_drive/" + str(new_block) + ".block", "r+b")
file_3.seek(offset_3 *4)
new_block = LBL.free_block()
write_str_bin(file_3, int_to_string(new_block, 4))
last_block = new_block
file_3.close()
file = open("/home/zikin/Documents/Final_project_OS/hard_drive/" + str(last_block) + ".block", "r+b")
write_str_bin(file, string2)
file.close()
i_dir.size = future_size
i_dir.binarize_all()
i_dir.write()
return True
def write_info(self): #Writes the whole Block to disk
file = open(self.filepath, "r+b")
write_str_bin(file=file, string=self.info)
return True