I am replying to you assuming that you and your parent will be able to see this.
Just tested this. Details first - Custom ROM (based on ICS). Stock google camera app (based on ICS).
"chmod 0600 /dev/exynos-mem" works well. The file permissions then shows crw------- as expected. The camera app still works fine. I tried recording videos and capturing pictures and was successful (1080p & 8MPx settings). Looking at the file permission after launching the camera app still shows no change (i.e. if it was 0600, it remains 0600). However, when I reboot the phone, the file's permission returns to 666. I have done this entire process three times just to be sure, and the file's permissions always returns to the default values.
Might need to look into it further, but frankly I don't have the time nowadays.
Just tested this. Details first - Custom ROM (based on ICS). Stock google camera app (based on ICS).
"chmod 0600 /dev/exynos-mem" works well. The file permissions then shows crw------- as expected. The camera app still works fine. I tried recording videos and capturing pictures and was successful (1080p & 8MPx settings). Looking at the file permission after launching the camera app still shows no change (i.e. if it was 0600, it remains 0600). However, when I reboot the phone, the file's permission returns to 666. I have done this entire process three times just to be sure, and the file's permissions always returns to the default values.
Might need to look into it further, but frankly I don't have the time nowadays.