CM11 - chmod and chown on internal sdcard not working I have a Samsung Galaxy S4 LTE phone (GT-i9505) and I put CyanogenMod 11 (M12) on it.
Previously I put CWM_6.0.4.7_Touch_GT-I9505.tar as Kernel to get root.

Now I want to use TitaniumBackup Pro and the feature to protect single backups, but this is not working.
I noticed that a chmod or chown (as root) doesn't change anything:

Example:

su 
chmod 075 /storage/emulated/0/TitaniumBackup/somebackupfile.tar.gz
chown system /storage/emulated/0/TitaniumBackup/somebackupfile.tar.gz


It is still 660 with root:sdcard_r

If I cannot set these I cannot protect the backup.
What am I doing wrong?

frank

EDIT 2015-01-29: I solved the problem with chmod 777 to /mnt/media_rw which I had to put into init.d as it reset again after reboot.
So I did this in my init.d:
busybox chmod 777 /mnt/media_rw
after this I can find the media_rw folder in Titanium and chose it. 
Now it works.
the chmod and chown binaries you are using there are from the android toolbox and are pretty lightweight. You can use more powerful binaries from busybox. Maybe this solves your problem as I also encountered issues with the small set of features of the toolbox ultilities.

busybox chmod 075 /storage/emulated/0/TitaniumBackup/somebackupfile.tar.gz
busybox chown system /storage/emulated/0/TitaniumBackup/somebackupfile.tar.gz




EDIT: Sometimes it just helps reading carefully. Didn't get that your sdcard is an emulated sdcard which is implemented permissionless. This means it is right behavior that chmod/chown do not work at all here: 

From: https://source.android.com/devices/storage/config.html

Devices may provide external storage by emulating a case-insensitive, permissionless filesystem backed by internal storage.