I'm trying to create a fake character device.
I want to make it usable within the provided Android emulator.

Firstly, I recompiled the Android Kernel editing the .config file,
adding CONFIG_MODULES.
Then, I wrote a module managing "/dev/mydev" (it acts as a 80 char
buffer) and crosscompiled it for arm architecture.
I ran the emulator and pushed busybox (for creating the /dev/mydev
with mknod) and loaded the module with insmod.

Now, both shell and common activities can interact with it, by using
standard open/close/write/etc...

I would like to create a specific permission for that device and make
it not readable from common Activities.
Is there some documentation/hints/links?

I know Android has a specific HAL but there's no documentation.
Thank you.

Luca
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