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Old 10-28-2015, 11:33 AM   #6
knc1
Going Viral
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Posts: 17,212
Karma: 18210809
Join Date: Feb 2012
Location: Central Texas
Device: No K1, PW2, KV, KOA
My couple days of browsing log files (on a non-jailbroken PW-3) left me thinking that my Kindle was sharing a lot more information with Amazon than I like.

[rant]
Not news, I have been upset since I posted my Chatty Kathy thread.
[/rant]

The browsing of log files plus using a disk forensics program on the USB storage area gave me a new "break it or fix it" idea.

Some things are discovering if the USB storage area is writable by doing a test write to it, followed immediately by a delete of the test filename.
Crude, but effective, at least until now.

  • Connect Kindle to PC with USB cable
  • At the top level (next to the 'documents' directory) create a directory with the name:
    testWrite.txt
    Use exactly that name, exactly that capitalization and extension.
  • Enter the just made testWrite.txt directory
  • Create an empty, hidden, file with the name:
    .keep
    Use exactly that name.
  • Set that name to 'read-only'
  • Return to the top level directory
  • Set the testWrite.txt directory to read-only


Surprise, surprise, that does not break the Kindle. (I really thought it would).

Things that are transferred by cvm still get transfered.
**BUT**
Things that are transferred by tmd (transfer manager daemon) are not transfered.
tmd errors out with 'file system not writable' whenever it tries to setup a transfer (either upload or download).
duh, stupid software.

Enjoy your new privacy.
The system no longer can upload your log files, reading metrics, ps-info on what processes are running, etc, etc, etc.

BIG IMPORTANT NOTE
Do not rely on this as your sole protection against OTA updates!
At least not until people have a chance to test what this prohibits and what it allows.

Just use this in addition to the other user storage entries mentioned in this thread.

in honor of #83 83

Last edited by knc1; 10-28-2015 at 04:00 PM.
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