My question is: What do I have to run in order to be able to change the file permissions and file ownerships on this weird sdcardfs partition. (Note: the same happens if I use /storage/emulated/0 instead of /storage/emulated)
drwxrwx-x 14 root sdcard_rw 4096 17:20 0 drwxrwx-x 2 root sdcard_rw 4096 01:12 obb A0001:/ # touch /storage/emulated/a A0001:/ # ls -la /storage/emulated/a -rw- 1 root sdcard_rw 0 17:44 /storage/emulated/a A0001:/ # chmod 777 /storage/emulated/a A0001:/ # ls -la /storage/emulated/a -rw- 1 root sdcard_rw 0 17:44 /storage/emulated/a Short demonstration showing that file permissions won't be applied: A0001:/ $ su A0001:/ # ls -la /storage/emulated total 12 drwx-x-x 4 root sdcard_rw 4096 17:44. I'm not sure if that makes any sense, but I'm a bit scared that something like mount -o remount, rw /mnt/sdcard/ (which apparently is what you had to do in the past to be able to set file permissions on the emulated sdcard partition).
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Some people suggest that Android used to use mount then switched to fuse and now with Oero uses sdcardfs. The partition seems to be mounted as an sdcardfs: A0001:/ # mount | grep /storage/emulated /data/media on /storage/emulated type sdcardfs (rw,nosuid,nodev,noexec,noatime,fsuid=1023,fsgid=1023,gid=1015,multiuser,mask=6,derive_gid) I am trying to adjust some file permissions/ownerships on the emulated sdcard partition. I have a rooted OnePlus One running LineageOS 15.1 (Oreo 8.1).
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