The Google TV File System is similar to most other Android Operating Systems.
Updates to the Google TV, unlike most the incremental updates that most Android phones receive, come as a complete file system meant to replace the previous. It is assumed that since Google TV devices are meant to be connected to high speed internet connections, downloading a full File System is more palatable than on a limited-bandwidth mobile device.
Updates are retrieved without user intervention from the Google Servers. You can use the device version number to check your current file system implementation (See [GoogleTV - Version Numbers] for more information). Updates are distributed as signed zip files including a recovery, system, and userdata image. Below is a list of the currently known of update packages.
- Logitech Update 1
- Logitech Update 2
- Sony Update 1
- Sony Update 2
- Sony Update 3
(Maybe they should be numbered by the GTV version number dislplayed post update...)
How to access the File System contained within an image
The Zip File is a simple matter to extract, however the images within them tack some massaging in order to explore. While they are a typical SquashFS File System, they have some padding bytes that prevented a simple "Unsquashing."
- It would be great if we could create a way to use dd to truncate the image instead of using a hex editor. You should be able ot somehow grep for the start and then dd the proper bits into a new file that could be explored correctly.*
Some data on the process is available here: http://android-dls.com/wiki/index.php?title=HOWTO:_Unpack,_Edit,_and_Re-Pack_Boot_Images