How to modify device permissions in Android _android

The examples in this article describe how to modify device permissions in Android. Share to everyone for your reference. Specifically as follows:

Sometimes we write the driver, in the upper program to access the device, but the Android code compiled device permissions are root, other users are inaccessible (including system), just need to be in the Android source code in the device to modify the permissions.

The specific modification location for the source code in the SYSTEM/CORE/INIT/DEVICES.C file in the static struct Perms_ devperms[] definition, such as add device hidraw0 permissions, just add a row:

Copy Code code as follows:

{"/dev/hidraw0", 0666, Aid_root, Aid_root, 0}

This allows the program to have access rights after Android starts.

can also be changed to

Copy Code code as follows:

{"/dev/hidraw0", 0600, Aid_system, Aid_root, 0}

This requires system to be accessible. To obtain system permissions, refer to the method for obtaining system permissions by the APK program

I hope this article will help you with your Android program.