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androidlinuxlinux-kernellinux-device-driverandroid-source

AOSP device node access permissions

This is a similar post as device-node-access-permissions-in-linux 6 years ago without an answer.

I have a device node at /dev/magic-i2c created using misc_register(), the problem is the default access permissions for this device node is for root, and cant be accessed by AOSP libraries. I tried adding .mode = S_IRWXUGO but no effect. How can I change the permission of this device node automatically during bootup?

Solution

  • You can add your device to this file in AOSP :

    {AOSP DIR}/system/core/rootdir/ueventd.rc

    First Add your device then set UID/GID and access mode for it.