def chDir(file_name, current_inode, currentUser):
if file_name == "..":
if len(ram.user_space[currentUser][1]) == 0:
return 0
new_inode = ram.user_space[currentUser][1].pop(-1)
ram.user_space[currentUser][0] = new_inode
return 0
dir_table = get_dir_table(current_inode)
if file_name not in dir_table:
# file_not_found()
return -11
new_inode = dir_table[file_name]
if ram.inode_table[new_inode][1] == 0:
ram.user_space[currentUser][1].extend([current_inode])
ram.user_space[currentUser][0] = new_inode
return 0
else:
# file_not_a_dir()
return -5
def blocksConsumedByFile(filename, current_inode):
filename = filename
dir_table = get_dir_table(current_inode)
if filename in dir_table:
return 0, ram.inode_table[dir_table[filename]][9]
else:
# file_not_found()
return -11, -11
def ls(current_inode):
current_dir = get_dir_table(current_inode)
dirs = " "
files = " "
for fil in current_dir:
if ram.inode_table[current_dir[fil]][1] == 0:
dirs = dirs + fil + " ";
else:
files = files + fil + " ";
# dirs on left of -
return dirs + "-" + files
def Open(fname, current_inode):
current_dir_table = get_dir_table(current_inode)
if fname not in current_dir_table:
return -11, -11
file_inode = current_dir_table[fname]
if ram.inode_table[file_inode][1] == 0:
return -10, -10
return 0, OpenFile(fname=fname,
mode="this para is no longer needed here",
parent_inode=current_inode,
file_inode=file_inode)
def trwt( fname, method, current_inode, arguments ,currentUser, delay = 0):
thread_data_title = fname + " " + str(method)
current_file_table = get_dir_table(current_inode)
if fname not in current_file_table:
return -4
file_inode = current_file_table[fname]
name = fname
status, call = Open(fname, current_inode);
oft_tname = str(file_inode) + "_t"
if oft_tname not in ram.oft:
ram.oft[oft_tname] = [0, call];
if file_inode in ram.ofp_count:
ram.ofp_count[file_inode] = ram.ofp_count[file_inode] + 1
else:
ram.ofp_count[file_inode] = 1
if method == 0:
while True:
if ram.oft[oft_tname][0] == 0 :
break
start, end = arguments[0], arguments[1]
t = threading.Thread(target=pread, args=(file_inode, start, end, thread_data_title, currentUser, delay),daemon=True)
t.start()
return 0
if method == 1:
# dont allow while semaphore
while True:
if ram.oft[oft_tname][0] == 0:
break
loc, text = arguments[0], arguments[1]
ram.oft[oft_tname][0] = 1
t = threading.Thread(target=pwrite, args=(file_inode, loc, text, thread_data_title, currentUser, delay))
t.start()
return 0
if method == 2:
while True:
if ram.oft[oft_tname][0] == 0:
break
size = arguments[0]
ram.oft[oft_tname][0] = 1
t = threading.Thread(target=ptruncate, args=(file_inode, size, thread_data_title, currentUser, delay))
t.start()
return 0
def move(fil1, fil2, parent_dir_inode):
dir_table = get_dir_table(parent_dir_inode)
if fil2 not in dir_table:
# fname_not_in_dir();
return -4
if fil1 not in dir_table:
# fname_not_in_dir();
return -4
fil2_inode = dir_table[fil2]
if ram.inode_table[fil2_inode][1] != 0:
# file_not_a_dir()
return -5
else:
fil1_inode = update_file_link_n_parent_dir(fil1, parent_dir_inode)
if fil1_inode == None:
# fname_not_in_dir();
return -4
add_link2file(fil1, fil1_inode, fil2_inode)
return 0