Path: csiph.com!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!feeder.erje.net!us.feeder.erje.net!newsfeed.fsmpi.rwth-aachen.de!eternal-september.org!feeder.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Unknown Newsgroups: comp.os.linux.hardware Subject: Jailbreak e-reader: theory? Date: Mon, 7 Apr 2014 01:11:39 +0000 (UTC) Organization: A noiseless patient Spider Lines: 39 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Injection-Date: Mon, 7 Apr 2014 01:11:39 +0000 (UTC) Injection-Info: mx05.eternal-september.org; posting-host="4592b35a7c6694cb0d120cb66e3d108a"; logging-data="21467"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19mJZ4dCvmfzJlNYQZX06PNPj8EbLB3Svk=" User-Agent: Pan/0.133 (House of Butterflies) Cancel-Lock: sha1:mP2Xpa2fRbl2nSfQPXjs475/lZo= Xref: csiph.com comp.os.linux.hardware:2282 On Fri, 28 Mar 2014 22:18:24 -0700, Dave wrote: > not.socialnetwork@gmail.com wrote: > >> Going to a remote, isolated location for a few weeks, may be a good >> reason to buy an e-reader. But since e-readers are said to actually be >> linux/android computers, a linux user would not want to be restricted >> to using the e-reader for reading text. >> >> It's commonly claimed that various intended-to-be-closed devices can be >> 'jail-break-ED' to expose their file-tree. >> >> Theoretically, I can't believe that my 80's pocket calculator can be >> hacked, from the provided input facilities: the keys. >> >> An e-reader has an even smaller . And the > files> would be read-only. >> >> So how could the user possibly gain control ? > > I'm sure if you looked on the web you'd find out how to hack a Nook e- > reader. I did, and I now have one with a web browser and other Android > apps running on it quite happily. Thanks, so far such search has failed. Rather than just a description, I need a hardware-engineer's theoretical explanation. Like: to get the battery-powered rPi, with no display nor input, to boot into playing a sequence of *.wav; you can bypass the login, and set the initial 'task', by editing /etc/inittab and what imediately follows. And then to navigate the selection of files played with no input, except the powerswitch, you [time modulate] cut the power at 'selected times'. Yes, I admit, it's easy to forget the details [that's why the Chinese invented writing], but if someone understood the underlying principles, of 'jailbreaking an ereader',they could explain them. IMO most of the code would be in ROM and therefore in-accessable. WDYS?