This code is still ugly, please re-write it and send pull-requests, if you want to use this.
Download the Android Native Development Kit (NDK): http://developer.android.com/tools/sdk/ndk/index.html#Downloads
Extract into some directory and put that in your path:
export PATH=ANDK_DIR:$PATH
In another directory clone this repo:
git clone --recursive https://github.com/android-rooting-tools/android_run_root_shell
Change to the directory where the repo was cloned
cd android_run_root_shell
To start build process use the following
ndk-build NDK_PROJECT_PATH=. APP_BUILD_SCRIPT=./Android.mk
If all goes well you will get the compiled binary at:
./libs/armeabi/run_root_shell
Download the Android Software Development Kit (SDK) ADT Bundle: http://developer.android.com/sdk/index.html
Extract into some directory and put the platform-tools folder in your path:
export PATH=SDK_DIR/sdk/platform-tools/:$PATH
Change to the directory with the compiled run_root_shell binary (see above)
Connect your Android device through USB (click Cancel if it asks to enable USB storage; charging only is the correct mode) and enable USB debugging on the device.
Start the adb server on your computer:
sudo adb start-server
Transfer run_root_shell to a temporary directory on the phone:
adb push run_root_shell /data/local
Ensure that run_root_shell has execute permissions:
adb shell chmod 777 /data/local/run_root_shell
Run the command on the phone:
adb shell /data/local/run_root_shell