unyaffs the android image

unyaffs is a tool to extract files from a yaffs file system image. It supports extract images created by mkyaffs2image. It is useful to patch the system.img and re-generate the system.img.
How to get it:

1. download a pre-build binary for linux: http://unyaffs.googlecode.com/files/unyaffs
2. download the source and compile with gcc -o unyaffs unyaffs.c:

* http://unyaffs.googlecode.com/files/unyaffs.c
* http://unyaffs.googlecode.com/files/unyaffs.h