https://github.com/winstonliyt/secfsystem

UNIX-like secondary file system for Course 10043601 Project
https://github.com/winstonliyt/secfsystem

c filesystem operating-system unix

Last synced: 10 months ago
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UNIX-like secondary file system for Course 10043601 Project

• Host: GitHub
• URL: https://github.com/winstonliyt/secfsystem
• Owner: WinstonLiyt
• License: mit
• Created: 2024-04-05T13:01:56.000Z (almost 2 years ago)
• Default Branch: master
• Last Pushed: 2024-06-16T04:10:39.000Z (over 1 year ago)
• Last Synced: 2025-01-26T09:27:54.255Z (12 months ago)
• Topics: c, filesystem, operating-system, unix
• Language: C++
• Homepage:
• Size: 146 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
## UNIX-like secondary file system  :yum:

### Experiment Name:

Constructing a UNIX-like secondary file system to implement basic file operations.

### Experiment Content:

Use a regular large file (e.g., c:\myDisk.img, referred to as the primary file) to simulate a UNIX V6++ disk. The information stored on the disk is organized in blocks, with each block being 512 bytes.

### Experiment Requirements:

1. Implement basic read and write operations on the logical disk.

2. Define the structure of a secondary file system on this logical disk, including:

    - **SuperBlock and Inode Area Location and Size**

    - **Inode Nodes**

        - Data Structure Definition: Pay attention to size, one disk block contains an integer number of Inode nodes.

        - Organization of the Inode Area: How to quickly locate a given Inode node number.

        - Index Structure: Composition of multi-level index structure, generation, and retrieval process of the index structure.

    - **SuperBlock**

        - Data Structure Definition

        - Design and implementation of algorithms for the allocation and recycling of Inode nodes.

        - Design and implementation of algorithms for the allocation and recycling of file data areas.

3. Directory Structure of the File System:

    - Structure of Directory Files

    - Design and implementation of directory retrieval algorithms

    - Design and implementation of directory structure addition, deletion, and modification

4. File Open Structure:

    - Design of File Open Structure: In-memory Inode node, File structure, Process open file table?

    - Allocation and recycling of in-memory Inode nodes

    - File open process

    - File close process

5. File Operation Interfaces:

    - **fformat**: Format the file volume

    - **ls**: Display all file names in the current path

    - **cd**: Change path (enter the next level or go back to the previous level)

    - **mkdir**: Create a directory

    - **fcreat**: Create a new file

    - **fopen**: Open a file

    - **fclose**: Close a file

    - **fread**: Read a file

    - **fwrite**: Write a file

    - **flseek**: Position the file read/write pointer

    - **fdelete**: Delete a file

  

### Experiment Environment:

- **Operating System**: Windows 10

- **Compiler**: Microsoft Visual Studio Community 2022

- **Plugin**: GitHub Copilot v1.177.0