https://github.com/junjizhi/ext2_ls

An implemenation of ls command on ext2 file system
https://github.com/junjizhi/ext2_ls

Last synced: 12 days ago
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An implemenation of ls command on ext2 file system

• Host: GitHub
• URL: https://github.com/junjizhi/ext2_ls
• Owner: junjizhi
• Created: 2015-04-13T20:08:40.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2015-04-13T20:29:28.000Z (over 9 years ago)
• Last Synced: 2024-07-11T12:22:24.021Z (4 months ago)
• Language: C
• Size: 145 KB
• Stars: 3
• Watchers: 2
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README

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README

        
Introduction

------------

A simplified version of ls implementation on ext2 file system. 

Assumptions

------------

There are assumptions about the size of disk image. Please refer to: http://www.cdf.toronto.edu/~csc369h/winter/assignments/a3/a3.html

For convenience, there is an generated disk image in img/ folder. 

Usage

------------

ext2_ls  

Example:

$ ./ext2_ls img/onedirectory.img /level1

drwxr-xr-x@ 2 root root 1024 1427146420 .

drwxr-xr-x@ 4 root root 1024 1427145880 ..

-rw-r--r--@ 1 root root 0 1427146419 new

-rw-r--r--@ 1 root root 128 1426429007 bfile

Notes

------------

0. The program only works in 64bit machine. It assumes the int type is 32bit. 

1. The print out of *ext2_ls* is not as nicely formatted as an usual

*ls* does. It needs work on *print_file* function.

2. *ext2_ls* does not support the doubly or triply i_block links.

3. There might be memory leak problems in the program. Probably due to

missing free() on the malloc'd pointers. 

4. ext2_mkdir only takes for absolute path as the parameters. 

5. Passing the root path "/" does not work well, but passing the second level path, e.g., "/level1" is fine. 

6. The ls output is not formatted as the standard ls command. There are small alignment differences. 

7. ext2_mkdir does NOT work for now. Running ext2_mkdir WILL RUIN THE DISK IMAGE. Test it with cautions!

Credits

------------

1. The implementation is mostly developed from an Operating System

Course assignment: http://www.cdf.toronto.edu/~csc369h/winter/assignments/a3/a3.html. 

The instructor Karen Raid designed the assignment and wrote a

detailed helpful specificiation for this program. 

2. list.h is copied from Kulesh Shanmugasundaram's site: http://isis.poly.edu/kulesh/stuff/src/klist/ Kulesh deserves all the credits for posting the explanation and the adapted source code.