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- #What is the purpose of busybox for android how to#
- #What is the purpose of busybox for android install#
- #What is the purpose of busybox for android archive#
- #What is the purpose of busybox for android android#
I changed the system initialization file in the initrd to mount the system partition of the internal flash memory at /foo rather than /system, because later system initialization steps attempt to remount /system as read-only and so on, and for some reason I could not disable that behavior: on fs
#What is the purpose of busybox for android archive#
# Extract files in the initrd cpio archive into the folder. I based my work on bauwks’s 2nduboot images and used abootimg to unpack files in the boot partition image boot.img: # Extracts files in the boot partition image into the current directory. More concretely, I modified the system initialization file inside the initrd inside the boot partition image to invoke a custom script that copied the relevant files into the system partition in the internal flash memory.
#What is the purpose of busybox for android android#
The solution, then, is clear: we create dummy system partition images that, instead of booting an Android system, installs su and Superuser.apk into the "normal" Android system in internal flash memory. This mechanism is probably used to repair corrupted system partitions by B&N customer support. Somebody on XDA-Developers had discovered that the bootloader of the Nook Tablet supported booting off an Android system located in partition images stored on an external microSD card. It means that one cannot run any code on the device that does not come from B&N period.īut of course there was another way in. This rules out 1) root APKs and 2) the majority of exploits out there that require executing commands over ADB. No access to Google Play / Android Market (or any Google Apps). Installing non-market apps (raw APKs) is disabled, and cannot be enabled from the UI. However, none of these methods that I knew of could work on the Nook Tablet, which is probably one of the most locked-down Android ROMs out there:ĪDB is disabled, and cannot be enabled from the UI. I would again refer you to this excellent presentation on various Android root exploits that have been or may still be used for this purpose. There are many generic or device-specific exploits that a hax0r may leverage to achieve privileged execution of arbitrary code.
#What is the purpose of busybox for android install#
Use exploit to install su (with SUID bit set) and Superuser.apk as rootĪfter su and Superuser.apk are installed correctly, apps that require root (such as Titanium Backup or AdAway) will invoke su to run code as the privileged user. So, how do you go about rooting an Android device? As I explain in my previous article, rooting is basically a two-step process:įind exploit that allows execution of arbitrary code as root After waiting for a few days, the absolutely pathetic app store and handicaps instituted by B&N finally motivated me to develop a rooting method for the device myself. All I could find was a YouTube video showing that the existing rooting method for its cousin, the Nook Tablet 16GB, did not work. It came as a nasty surprise, therefore, when I discovered that no one had yet succeeded in rooting the device. Being the hax0r that I am, the first thing I did when I got home was to try to root the device. Sometime in late February (2012), on a visit to to a Barnes & Noble store in Boston, I bought the then freshly released Nook Tablet 8GB entirely on impulse for $199. For context, you can read my original thread " Root for Nook Tablet 8GB (w/ Android Market) on XDA-Developers where I published my rooting method, which has reached a download count of - wait for it - OVER NINE THOUSAND!!!įor an overview of how rooting works behind the scenes, you may want to read my previous article How Rooting Works - A Technical Explanation of the Android Rooting Process as background.
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Rather, it is about how one could go about developing a rooting method for a device that no one has rooted before, and is told through my experiences with rooting a particular device - the Barnes & Noble Nook Tablet 8GB.
#What is the purpose of busybox for android how to#
Android Technical Notes Android Rooting: A Developer's Guideįirst things first - this is not about how to apply a rooting method, e.g., a one-click-root, to an Android device.