Exception 'open failed: EACCES (Permission denied)' on Android

Question

I am getting

open failed: EACCES (Permission denied)

on the line OutputStream myOutput = new FileOutputStream

Answer 1

I am creating a folder under /data/ in my init.rc (mucking around with the aosp on Nexus 7) and had exactly this problem.

It turned out that giving the folder rw (666) permission was not sufficient and it had to be rwx (777) then it all worked!