Reverse Engineering : Extract contents from .img file

Unyaffs is a program to extract files from a YAFFS2 file system image. Currently it can only extract images created by mkyaffs2image.

Download the source from here.

Compiling:

Extract the contents into a suitable place and run the following command

make

Usage:

unyaffs [options] <image_file_name> [<extract_directory>]
Options:
-d               detection of flash layout, no extraction
-b               spare contains bad block information
-c <chunk size>  set chunk size in KByte (default: autodetect, max: 16)
-s <spare size>  set spare size in Byte  (default: autodetect, max: 512)
-t               list image contents
-v               verbose output
-V               print version
Source: Official github repository