def rmdir(directory):
inum = file_name_layer.lookup(directory, path_name_layer._wd)
i = inode_number.inode_number_to_inode(inum)
if (i.inode_type == FileType.directory):
blockLayer.release_block(i.blocks[0])
inode_number.release_inode(inum)
inode_directory = inode_number.inode_number_to_inode(path_name_layer._wd)
block_directory = blockLayer.block_number_to_block(inode_directory.blocks[0])
buf = [""] * block_directory.size
buf = block_directory.read(0, buf, 0, block_directory.size)
buf = "".join(buf)
search = directory + "|" + str(inum) + ","
buf = buf.replace(search, "")
clear = "_" * 512
block_directory.write(0, clear, 0, len(clear))
block_directory.write(0, buf, 0, len(buf))
if(len(buf) == 0): # checks to see if the directory is now empty
block_directory.size = 0
else:
raise Exception("Inode %r is not of type directory." % inum)
def rm(filename):
num = 0
inum = file_name_layer.lookup(filename, path_name_layer._wd)
i = inode_number.inode_number_to_inode(inum)
for b in i.blocks:
if (b != -1):
blockLayer.release_block(i.blocks[num])
num += 1
inode_number.release_inode(inum)
inode_directory = inode_number.inode_number_to_inode(path_name_layer._wd)
block_directory = blockLayer.block_number_to_block(inode_directory.blocks[0])
buf = [""] * block_directory.size
buf = block_directory.read(0, buf, 0, block_directory.size)
buf = "".join(buf)
search = filename + "|" + str(inum) + ","
buf = buf.replace(search, "")
clear = "_" * 512
block_directory.write(0, clear, 0, len(clear))
block_directory.write(0, buf, 0, len(buf))
if(len(buf) == 0): # checks to see if the directory is now empty
block_directory.size = 0
def rm(name,rmdir=False):
#get the directory which contains the file by parsing the path
#find the last slash in the path
slashPos = []
for i in range(len(name)):
if name[i] == '/':
slashPos.append(i)
#if no slashes are found, use wd
if len(slashPos) == 0:
dir = FileNameLayer.wd
matchName = name
elif slashPos[-1]==0:
#if the last slash is the first char, use root dir
dir = FileNameLayer.rootDirectory
matchName = name[1:]
else:
#get the inode number for the path up to the last slash, which is the directory that contains the file
dir = general_path_to_inode_number(name[:slashPos[-1]],createOnFailure=0)
matchName = name[(slashPos[-1]+1):]
#free the file's inode
fd = OPEN(name)
InodeNumberLayer.release_inode(fd.inodeNum)
#remove the reference from wd
contents = FileNameLayer.read(dir)
list = ''.join(contents).split(',')
i = 0
while i < len(list):
pair = list[i].split('|')
#if the file is in the dir, remove it
if pair[0] == matchName:
list.pop(i)
FileNameLayer.write(dir,','.join(list))
return success
else:
i += 1
if rmdir:
raise Exception("Directory not found")
else:
raise Exception("File not found")
