Siple File Syetem

Simple File System: OS_CourseDesign

2024 Operating Systems Course Design

Project Overview

This course design project involves creating a file system with essential functionalities, such as file creation, deletion, modification, and querying. Additionally, it includes user registration and login features. The file system employs a two-level directory structure, where the first level is the user account and the second level is the file system under the user account. To simplify the design, advanced features such as file sharing, file system security, and special file types (like pipe and device files) are not implemented.

Features and Implementation Status

User Commands

Command	Description	Status
register	Register a user	Completed
login	Login a user	Completed
logout	Logout a user	Completed
listUsers	Display user accounts and passwords	Completed

File Commands

Command	Description	Status
create	Create a file	Completed
delete	Delete a file	Completed
open	Open a file	Completed
close	Close a file	Completed
read	Read a file	Completed
write	Write to a file	Completed
move	Move a file	Completed
copy	Copy a file	Completed
paste	Paste a file	Completed
flock	Lock/Unlock a file	Completed
head -num	Display first num lines of a file	Completed
tail -num	Display last num lines of a file	Completed
lseek	Move file read/write pointer	Completed

Directory Commands

Command	Description	Status
cd	Change directory	Completed
dir	Display current directory contents	Completed
mkdir	Create a directory	Completed
rmdir	Delete a directory	Completed

Disk Operations

Command	Description	Status
import	Import contents from local disk to virtual disk	Completed
export	Export contents from virtual disk to local disk	Completed

Multithreading Support

• One thread interacts with users, accepting requests and converting them into corresponding messages, which notify the backend thread maintaining the virtual disk driver. (Completed)
• The program can run multiple instances simultaneously, each accepting user requests, but only one backend thread maintains the virtual disk driver's contents. (Completed)

Summary and Improvements

During the project defense, the instructor noted that the /dir/ command's output format was not well-organized. It should display the directories and files in a list format for better readability.

Full Changelog: https://github.com/Luintal/Os_CourseDesign/commits/V1.2