AnselmStrauss/LibArchive

Enhancing FreeBSD's Libarchive

Contents

Enhancing FreeBSD's Libarchive
About
People
Status
Roadmap
Goals
Todo
Source Code
Resources

About

Libarchive is an archive library for FreeBSD developed by TimKientzle. This project's goal is to enhance it as far as possible. The original project description can be found on the FreeBSD page at Google Summer of Code 2008.

People

Mentor: TimKientzle
Student: AnselmStrauss

Status

September 8

It truly has been a long time I last made updates here ... GSOC finished, despite I reached only a few of my original goals. Well, work will continue, not under Google's lead, and on a free time basis. Most likely, this site won't be updated anymore. Check the source repositories for updates.

July 31

Did some more features on the ZIP writer and testing. Consequently I also had to fix some bugs ... Now turning on the compression support and support for non-regular file entries. Also must keep an eye on the next goal, most likely the PAX frontend.

July 18

Implemented a basic ZIP writer without compression support and CRC computation. Now I must definitely go for some testing ... Last week on Thursday 11th, there was also a meetup at Google Zurich. It was good to see some real faces behind the project, there were also some nice presentations and discussions. What a pity Google didn't let us have a look at their server room ...

July 7

Working on the ZIP writer and dealing with:

Collecting central directory structure over multiple entries, holding it in memory and appending it at the end of the archive.
Computing CRC sums over data streams.
Using file data descriptors (appended to file data) instead of the fields in the file header.

Tired for now, tomorrow is another day ...

June 30

I set up:

Eclipse + CDT to work with Libarchive
More P4 things

I bought a PDF of "C in a Nutshell" to refresh my C programming skills and have a good reference. Also I made some exercises with GNU Autotools to understand it better. Also I had a lot to do with my master thesis, so I spend a lot of time there ... $:\$

June 05

This week coding also started for me

May 25

Finally found some time again to work on my project. I setup the wiki pages, so now I'm almost ready to go. Our studies will finish May 30, one week after the official coding phase start.

Roadmap

Week/Date	Google Phase	My Phase
1 (26.05.)	Coding I	P4 setup
2	Coding I	Eclipse + Autotools
3	Coding I	Eclipse + Autotools, Reading code
4	Coding I	Reading code
5	Coding I	Blackout (master thesis ... )
6	Coding I	Coding ZIP writer
7 (07.07.)	Midterm Evaluation	Coding ZIP writer
8	Coding II	Testing ZIP writer
9	Coding II	ZIP writer basic features
10	Coding II	ZIP writer basic features
11	Coding II	ZIP writer compression
12	Coding II	Coding
13 (18.08.)	Final Evaluation	Coding, evaluation stuff
14	Final Evaluation	Coding
15 (01.09.)	Code Submission	Submitting code

Goals

ZIP writer

ZIP reader is already there and the ZIP writer can lean it's code on the existing CPIO writer.

Official .ZIP File Format Specification is available from PKWARE. The Info-ZIP software specifies some of the extensions mentioned by PKWARE.

ZIP features that are won't be covered by this project:

Header compression
Encryption
Multi-part archives

Task	Status
Simple writer without any features	DONE
Compression support	OPEN
Central directory	DONE
Tests	PARTIAL
ZIP64 support	OPEN
Correct CRCs	DONE
Folder entry support	DONE
Unix to DOS time conversion	DONE
Storing permissions	DONE

PAX frontend

The Open Group Base Specifications Issue 6

ISO writer

Not started yet.

Sophisticated testing