[Bug 1955347] Re: rsync works bad with encfs now

[Micouin Claude]

* Installation of Ubuntu kubuntu-18.04-desktop-amd64 in VirtualBox
* Creation of user "toto" passwd is "clown". The name of virtual machine is toto-VirtualBox
* Installation of rsync 3.1.2-2.1ubuntu1.4 and encfs 1.9.2-2build2
* Creation of two directories (by toto) "Backup" and "Directory_to_save" inside of /home/toto and creation of two directories "Crypt" and ".Crypt" inside of the directory "Directory_to_save"
$ mkdir -p /home/toto/Backup /home/toto/Directory_to_save/Crypt   /home/toto/Directory_to_save/.Crypt
* Filling the directory "Directory_to_save" with diverse files and directories
$ cd /home/toto/Directory_to_save/ ; mkdir Countries  Downloads  Felines  Fishes  Images  Models  Mountains  Musics  Public  Videos
$ cd /home/toto/Directory_to_save/Countries/ ; touch China.txt  France.txt  Germany.txt  Japan.txt
$ cd /home/toto/Directory_to_save/Felines ; touch Cats.txt  Lions.txt  Tigers.txt
$ cd /home/toto/Directory_to_save/Fishes ; touch Sharks.txt  Trouts.txt
$ cd /home/toto/Directory_to_save/Mountains ; touch Alps.txt  Atlas.txt  Himalayas.txt
Or with one ligne only
mkdir -p /home/toto/Backup /home/toto/Directory_to_save/Crypt   /home/toto/Directory_to_save/.Crypt ; cd /home/toto/Directory_to_save/ ; mkdir Countries  Downloads  Felines  Fishes  Images  Models  Mountains  Musics  Public  Videos ; cd /home/toto/Directory_to_save/Countries/ ; touch China.txt  France.txt  Germany.txt  Japan.txt ; cd /home/toto/Directory_to_save/Felines ; touch Cats.txt  Lions.txt  Tigers.txt ; cd /home/toto/Directory_to_save/Fishes ; touch Sharks.txt  Trouts.txt ; cd /home/toto/Directory_to_save/Mountains ; touch Alps.txt  Atlas.txt  Himalayas.txt
* Test of the command rsync by root (or sudo)
1) With rsyc 3.1.3-8
# rsync -a --progress --delete-during   /home/toto/Directory_to_save/       /home/toto/Backup/
sending incremental file list
.Crypt/
Countries/
Countries/China.txt
              0 100%    0.00kB/s    0:00:00 (xfr#1, to-chk=11/25)
Countries/France.txt
              0 100%    0.00kB/s    0:00:00 (xfr#2, to-chk=10/25)
Countries/Germany.txt
              0 100%    0.00kB/s    0:00:00 (xfr#3, to-chk=9/25)
Countries/Japan.txt
              0 100%    0.00kB/s    0:00:00 (xfr#4, to-chk=8/25)
etc, etc, etc.
OK. There is no "IO error encountered -- skipping file deletion" message.
2) With rsync 3.1.2-2.1 
# rsync -a --progress --delete-during   /home/toto/Directory_to_save/       /home/toto/Backup/
sending incremental file list
.Crypt/
Countries/
Countries/China.txt
              0 100%    0.00kB/s    0:00:00 (xfr#1, to-chk=11/25)
Countries/France.txt
              0 100%    0.00kB/s    0:00:00 (xfr#2, to-chk=10/25)
Countries/Germany.txt
              0 100%    0.00kB/s    0:00:00 (xfr#3, to-chk=9/25)
Countries/Japan.txt
              0 100%    0.00kB/s    0:00:00 (xfr#4, to-chk=8/25)
              
etc, etc, etc.
OK. There is no "IO error encountered -- skipping file deletion" message.
* Mount of the directory ".Crypt" on "Crypt" (empty) by toto
encfs /home/toto/Directory_to_save/.Crypt/  /home/toto/Directory_to_save/Crypt/ #(give a passwd)
* Filling the directory "Crypt" with diverse files and directories
$ cd /home/toto/Directory_to_save/Crypt/ ; mkdir Drinks  Fruits  Vegetables
$ cd /home/toto/Directory_to_save/Crypt/Drinks ; touch Coffee.txt  Tea.txt  Water.txt  Wine.txt
$ cd /home/toto/Directory_to_save/Crypt/Fruits ; touch Grapes.txt  Raisins.txt  Strawberries.txt
$ cd /home/toto/Directory_to_save/Crypt/Vegetables ; touch Eggplant.txt  Tomatos.txt
Or with one ligne only
cd /home/toto/Directory_to_save/Crypt/ ; mkdir Drinks  Fruits  Vegetables ; cd /home/toto/Directory_to_save/Crypt/Drinks ; touch Coffee.txt  Tea.txt  Water.txt  Wine.txt ; cd /home/toto/Directory_to_save/Crypt/Fruits ; touch Grapes.txt  Raisins.txt  Strawberries.txt ; cd /home/toto/Directory_to_save/Crypt/Vegetables ; touch Eggplant.txt  Tomatos.txt
* Second test of the command rsync by root (or sudo)
1) With rsyc 3.1.3-8
# rsync -a --progress --delete-during   /home/toto/Directory_to_save/       /home/toto/Backup/
sending incremental file list
rsync: readlink_stat("/home/toto/Directory_to_save/Crypt") failed: Permission denied (13)
IO error encountered -- skipping file deletion
.Crypt/
.Crypt/.encfs6.xml
          1,297 100%    0.00kB/s    0:00:00 (xfr#1, to-chk=24/37)
.Crypt/8SZgl8DegOq,0kTdGJ4BYUFm/

Now there is a problem...

2) With rsync 3.1.2-2.1
# rsync -a --progress --delete-during   /home/toto/Directory_to_save/       /home/toto/Backup/
sending incremental file list
rsync: readlink_stat("/home/toto/Directory_to_save/Crypt") failed: Permission denied (13)
IO error encountered -- skipping file deletion

Here there is a problem too... :-(

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https://bugs.launchpad.net/bugs/1955347

Title:
  rsync works bad with encfs now

Status in rsync package in Ubuntu:
  Incomplete

Bug description:
  Hello,
  I think rsync works bad with encfs now.

  When root uses it, rsync cannot read a directory encrypted with encfs
  by a user. More precisely, it cannot read the mounted directory, the
  virtual one where the user can read the datas.

  Until now there was only a warning like this
  "rsync: readlink_stat("/home/claude/Documents_chiffres") failed:
  Permission denied (13)"
  and the software went on working (only ignoring the content of the mounted directory and of course without saving this content)

  But recently there is this more:
  "IO error encountered -- skipping file deletion"
  and because of this "skipping file deletion", the software can't work normally. The destination gets bigger more and more because the deleted files in the source are not deleted in the destination.

  Thanks for reading me.
  rsync	3.1.3-8ubuntu0.1
  Description:    Ubuntu 20.04.3 LTS
  Release:        20.04

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