Can't Modify System on Android O DP3 with Root?

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SubjectGinger

Senior Member
Oct 6, 2010
106
22
OnePlus 7
Hello,
I have root and busybox on my Pixel, but AdAway is failing to copy the hosts file, and I am unable to modify permissions of the system folder. I just keep getting the error "operation failed" using Solid File Explorer.

Anyone know why? I obviously have root access, why am I being denied?
 

gubacsek

Senior Member
Jun 18, 2010
262
310
Hello,
I have root and busybox on my Pixel, but AdAway is failing to copy the hosts file, and I am unable to modify permissions of the system folder. I just keep getting the error "operation failed" using Solid File Explorer.

Anyone know why? I obviously have root access, why am I being denied?

was it working on any other android O developer preview releases ?
my best guess is that android O is using toybox instead of toolbox for mount and it matters in what orders the parameters are passed to the mount command.
mount -o remount,rw /system was working in 7.1.2 , but it is not working on 8.0, it must be mount -o rw,remount /system
the app developers will have to change the command in their apps...
of course this is only a wild guess, because there can be a lot of other reasons, this just something that I stumbled upon and got help with here on XDA. (thanks again @jcmm11 !!!)