Ioctl Control Under Android

One of the interesting undocumented features of android is the inclusion of the ioctl command line utility in toolbox.  

ioctl.c  - Source code modified to compile under Ubuntu.

Without having to compile code for different architectures, you can generate ioctl's on any Android Linux platform.  
This opens the door to lower-level kernel access from within apps.  

The android ioctl app

AndroidIOCTL.apk

This app includes a list of common ioctls (with their hex codes) for easy prototyping.
While this app can work with non-rooted devices,  most device special files require superuser permissions.