Jun Sun's Linux/Open Source Page

I went through the process of building Vyatta Core based AMI and put them on sale in the marketplace. In a true open source fashion, I'm documenting what I have done.

Build CentOS AMI for Amazon EC2

A script that helps one to build CentOS 6 based distro as Amazon EC2 AMI

Android hacking

No, I can't ignore that. See more notes here. It is the best hacking platform I have ever seen. (circa Jan 2009)

Qtopia/QTE

I recently (circa Dec 2005) spent a huge amount time and figured out how to build qtopia/qte for an ARM target. You can find a much simpler way to build them through a script under this directory. Here is the readme files.

A list of RPM packages

Dovecot for FC3
Mutt for FC5 - included a patch that spawn an external viewer for "application/otctet-stream" type based on their file extensions.

Revamp Linux time subsystem

Here is my idea about revamping Linux time subsystem to provide higher resolutions. Foundamentally it will transform Linux from a tick-driven time subsystem to a event-driven time subsystem.

My Linux/MIPS porting guide

Slightly outdated (on 02/10, 2004), but with help from people like Steven Hills this can be update to cover 2.6 hopefully soon. I also kept a "random thought list around.

Some small userland tarballs (for testing purpose)

(To be added and cleaned up later ... but here are the old ones)

Yes I play with WLAN, especially hostap driver, on Linux. If I have time, there are some goodies to release here (including a bootable CD to turn any PC/laptop into a wireless access gateway).

Real-time-ness on Linux

Some real-time related stuff:

a preemptiable kernel patch for MIPS around 2.4.21
some preemption latency test utilities

xcvs - a web-based CVS tracking tool

Check it out at its own homepage at http://xcvs.sourceforge.net. It is a VERY COOL tool.

Some useful scripts

cvspatch - apply a patch to a CVS tree (do proper CVS add/rm etc..)
respin-defconfigs - Wheneven config file changes, default configs need to be updated. This script just does that for you.
ipatch - interactively apply a patch, hunk by hunk.
usock-timeout - client/server PHP scripts that test how long a NAT'ing gateway would keep an outgoing UDP port open. I have tested two gateways so far. One has a timeout of 2 minutes and the other has 10 minutes.

Miscellaneous

mini-HOWTO on enabling gdbserver for MMU-less systems with uCLinux
How to enable SyncML on T-Mobiled branded V3 (RAZR)
A call graph to illustrate what happens when a user suspend and resume Linux on vmplayer.
ebase - An old project on embedded database library. Not active anymore. I hope someday I can take "work" vacantion to get version implemented.
A set of extremely useful, hard-to-find test programs, but ill-documented. For advanced and curious hackers only.
Collection of my patches. Note this starts to get incomplete as xcvs is now working. I will probably put another page to automatically extrace patches that I check into CVS trees.