gvfsd-sftp do not preserve file ownership on file modification operation

[Sancho]

Problem overview:
When using gvfs-sftp connection to modify some remote files, editing remotely (with gedit, sublime, etc) then saving these files changes their user and group ownership on server.

Problem configuration:
- one desktop with Ubuntu 12.04.2 LTS and Unity desktop
  (3.2.0-39-generic #62-Ubuntu SMP Thu Feb 28 00:28:53 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux)
- one server width Ubuntu 12.04.2 LTS server
  (3.5.0-25-generic #39~precise1-Ubuntu SMP Tue Feb 26 00:11:13 UTC 2013 i686 i686 i386 GNU/Linux)
- one server directory with some files
  - directory permission : drwxrwx--- serverUser clientUser
  - files in this directory : -rw-rw---- serverUser clientUser
    (aka <perms> <user-owner> <group-owner>)

Problem reproduction:
1- Use Nautilus (3.4.2) to "Connect to server ..." from your desktop pc to your server pc using your ssh 'clientUser' credential (as mentioned above).
2- Browse to the above mentioned directory through Nautilus (from desktop client in the remote served directory)
3- Open a remote file for edition with gedit (or any other desktop editor, from nautilus or command line like gedit ~/.gvfs/...)
4- Edit and save file
5- Check file permission on server directory
6- the file ownership has changed to something like -rw-rw---- clientUser clientUser

Using vi (or vim) give an error at save time, but, the content is save succefully, permission are set to something -rw------- clientUser clientUser

[Sancho (christophe-andral)]

As mentions Scott (https://bugs.launchpad.net/ubuntu/+source/gvfs/+bug/227808/comments/27):
"I hope this bug is fixed soon as it completely ruins a really cool way of working in Linux. "

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Patryk "LeadMan" Benderz (leadman)]

This regression is back again:

patben@patben-amd:~/.ssh$ lsb_release -r
Release: 15.10
patben@patben-amd:~/.ssh$ apt-cache policy gvfs gedit kate
gvfs:
  Zainstalowana: 1.24.2-0ubuntu4
  Kandydująca: 1.24.2-0ubuntu4
  Tabela wersji:
 *** 1.24.2-0ubuntu4 0
        500 http://pl.archive.ubuntu.com/ubuntu/ wily/main amd64 Packages
        100 /var/lib/dpkg/status
gedit:
  Zainstalowana: 3.10.4-0ubuntu13
  Kandydująca: 3.10.4-0ubuntu13
  Tabela wersji:
 *** 3.10.4-0ubuntu13 0
        500 http://pl.archive.ubuntu.com/ubuntu/ wily/main amd64 Packages
        100 /var/lib/dpkg/status
kate:
  Zainstalowana: 4:15.08.2-0ubuntu1
  Kandydująca: 4:15.08.2-0ubuntu1
  Tabela wersji:
 *** 4:15.08.2-0ubuntu1 0
        500 http://pl.archive.ubuntu.com/ubuntu/ wily/universe amd64 Packages
        100 /var/lib/dpkg/status

Possibly this is duplicate of bug #227808