Unable to create Files on enforced device

Asked Aug 22 '18 at 14:45

Active Aug 22 '18 at 14:45

Viewed 78 times

I have a system service that is creating a folder and some files under /data/vendor/

Since I have a rooted Android device in Enforcing state, the sepolicy is not permitting me to do this so I am using the dac_override capability in an allow rule - which works.

Now, I am trying to import the code to the Beta version of Android P / 9.0, but in domain.te file they added this capability to the neverallow list :(

When I am not using this capability and trying to use

File _file = new File(PATH);

The result is that _file is always null!

Can anyone suggest a way to create my files??

asked Aug 22 '18 at 14:45

FarFarAwayUser

Resort to `shell` commands, with `su`. It's the most foolproof method I know. Example: `su -c touch filename.ext` – Susmit Agrawal Aug 22 '18 at 14:47
I need the solution programmatically... – FarFarAwayUser Aug 22 '18 at 14:51
This can be done in Java. Take a look here: https://www.linglom.com/programming/java/how-to-run-command-line-or-execute-external-application-from-java/ – Susmit Agrawal Aug 22 '18 at 14:53
Try this: `Runtime.getRuntime.exec("su -c touch filename.ext");` – Susmit Agrawal Aug 22 '18 at 14:55
It doesn't compile.... Is there other option? using SELinux rules maybe?? – FarFarAwayUser Aug 23 '18 at 09:21
I haven't used SELinux rules before... What is the error you get while compiling? – Susmit Agrawal Aug 23 '18 at 09:22
error: expected Runtime.getRuntime.exec("su -c touch /data/vendor/misc/"); ^ error: illegal start of type Runtime.getRuntime.exec("su -c touch /data/vendor/misc/"); ^ Can I run this command from cmd just to make sure it will solve my original problem of not being able to create files? – FarFarAwayUser Aug 23 '18 at 09:27
So it didnt help anyways.... I am still getting null when creating new File object – FarFarAwayUser Aug 23 '18 at 12:11

Unable to create Files on enforced device

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