代写FAT32留学生、代做File System、代做c/c++程序语言、c/c++语言代写

日期：2019-04-10 10:04

Programming Assignment 3: FAT32 File System

Due: November 7 2018 5:30PM

Description

This assignment will familiarize you with the FAT32 file system. You will become familiar with

file allocation tables, endieness, as well as file access. You will implement a user space shell

application that is capable of interpreting a FAT32 file system image. The utility must not corrupt

the file system image and should be robust. No existing kernel code or any other FAT 32 utility

code may be used in your program.

You may complete this assignment in groups of two or by yourself. If you wish to be in a group

of two the group leader must email me your group member’s names by October 31, 2018. Your

email must have the subject line “3320 [Section #] Project 3 Group” where section number is

002 or 003. ( 003 is the 5:30pm class, 002 is 7:00pm )

The code you submit for this assignment will be verified against a database consisting of kernel

source, github code, stackoverflow, previous student’s submissions and other internet resources.

Code that is not 100% your own code will result in a grade of 0 and referral to the Office of

Student Conduct.

You can find a FAT32 file image, fat32.img, on blackboard under Assignment 3. Also under

Assignment 3 you can find the fat 32 specification, fatspec.pdf. You will need this specification

to interpret the file system image correctly.

Program Requirements

Your program shall be named mfs.c and shall be implemented in C or C++. You shall not use the

system calls system() or any of the exec family of system calls.

Your program shall print out a prompt of mfs> when it is ready to accept input.

The following commands shall be supported:

open <filename>

This command shall open a fat32 image. Filenames of fat32 images shall not contain spaces and

shall be limited to 100 characters.

If the file is not found your program shall output: “Error: File system image not found.”. If a file

system is already opened then your program shall output: “Error: File system image already

open.”.

close

This command shall close the fat32 image. If the file system is not currently open your program

shall output: “Error: File system not open.” Any command issued after a close, except for

open, shall result in “Error: File system image must be opened first.”

info

This command shall print out information about the file system in both hexadecimal and base 10:

BPB_BytesPerSec

BPB_SecPerClus

BPB_RsvdSecCnt

BPB_NumFATS

BPB_FATSz32

stat <filename> or <directory name>

This command shall print the attributes and starting cluster number of the file or directory name.

If the parameter is a directory name then the size shall be 0. If the file or directory does not exist

then your program shall output “Error: File not found”.

get <filename>

This command shall retrieve the file from the FAT 32 image and place it in your current working

directory. If the file or directory does not exist then your program shall output “Error: File not

found”.

cd <directory>

This command shall change the current working directory to the given directory. Your program

shall support relative paths, e.g cd ../name and absolute paths.

ls

Lists the directory contents. Your program shall support listing “.” and “..” . Your program shall

not list deleted files or system volume names.

read <filename> <position> <number of bytes>

Reads from the given file at the position, in bytes, specified by the position parameter and output

the number of bytes specified.

volume

Prints the volume name of the file system image. If there is a volume name, it will be found in

the reserved section. If there is no volume name, your program shall output “Error: volume

name not found.”

Grading

The assignment will be graded out of 100 points. Compiler warnings are there to tell you

something is not correct. Pay attention to them and you will save yourself a lot of late nights

debugging code. Code that does not compile will earn 0.

Your code will be compiled and graded on omega.uta.edu . Your code must compile as:

g++ mfs.c -o mfs

Category Points

open 5

close 5

info 10

stat 10

cd 15

ls 15

get 15

read 10

volume 10

No extra debug or extraneous output 5

How to submit homework

1. Submit your file mfs.c on blackboard.