copies don't respect setuid and setgid settings

[sylvain just]

Binary package hint: nautilus

Release: 8.10

I'am not sure that nautilus is only one package implied. My nautilus version is 1:2.24.1-0ubuntu1

Description of problem :

I have 2 users : user-a and user-b (with respective first group: groups group-a and group-b)
they are both in third group named common-group.

Their own HomeDirectory are : (ls -l /home/user*)
drwxrwx--- 5 user-a group-a 4096 2009-04-20 14:00 user-a
drwxrwx--- 5 user-b group-b 4096 2009-04-20 14:02 user-b
and umask 007

The common directory : (ls -l /home/common*)
drwxrws--- 2 root common-group 4096 2009-04-20 14:03 common-directory
(chmod 2770)

So, when I copy or move some files or directories from the HomeDirectories with CLI (cp or mv), setgid bit is preserved and owner group too.

But if I copy-paste or drag'n drop from nautilus, directories or files moved/copied keep old owner group and old permissions (without setgid bit).

This Problem is same for a deported or local filesystem (nfs / two local partition of a same hard drive / two directories of a same parititon / a local parititon and an usb key).

Exemple:

~$ ls -l /home/*
/home/common-directory/:
total 0

/home/user-a/:
total 4
drwxrwx--- 2 user-a group-a 4096 2009-04-21 17:07 user-a.dir
-rw-rw---- 1 user-a group-a 0 2009-04-21 17:08 user-a.file

/home/user-b/:
total 4
drwxrwx--- 2 user-b group-b 4096 2009-04-21 17:07 user-b.dir
-rw-rw---- 1 user-b group-b 0 2009-04-21 17:07 user-b.file
~$ su user-a
user-a: ~$ umask
0007
user-a: ~$ cp -rv * ../common-directory/
`user-a.dir' -> `../common-directory/user-a.dir'
`user-a.file' -> `../common-directory/user-a.file'
user-a: ~$ ls -l ../common-directory/
total 4
drwxrws--- 2 user-a common-group 4096 2009-04-21 17:15 user-a.dir
-rw-rw---- 1 user-a common-group 0 2009-04-21 17:15 user-a.file

So when I'm log in gnome with User "user-b" and I copy paste through nautilus the files in my home directory, the result is bellow :

user-a: ~$ ls -l ../common-directory/
total 8
drwxrws--- 2 user-a common-group 4096 2009-04-21 17:15 user-a.dir
-rw-rw---- 1 user-a common-group 0 2009-04-21 17:15 user-a.file
drwxrwx--- 2 user-b common-group 4096 2009-04-21 17:24 user-b.dir
-rw-rw---- 1 user-b group-b 0 2009-04-21 17:24 user-b.file

Then, owner group isn't good for file copied from nautilus interface and setgid bit isn't present for direcory...

NB: I tried to use gvfs-copy command. Result is good for file (good owner group, good permissions) but with directory, error message is :
"Impossible to copy a repertory recursively"

Thanks in advance for fix :)

[Sebastien Bacher (seb128)]

thank you for your bug report, that's an upstream issue and should be sent to bugzilla.gnome.org

[sylvain just (sy-just)]

Bug reported on http://bugzilla.gnome.org/show_bug.cgi?id=579806
Thank you

[Sebastien Bacher (seb128)]

thank you for sending the bug to GNOME

[Sebastien Bacher (seb128)]

Is that still an issue in newer Ubuntu versions?

[mirohe (miguelrodriguezhernando)]

Hi Sebastien Bacher

I tried it on ubuntu 16.04 and 18.04 and the error is also true.
In other more recent versions, I do not know.

[Sebastien Bacher (seb128)]

Thanks for the reply, in fact it seems basically the same issue as in bug #1812818

[Sebastien Bacher (seb128)]

Reported upstream on https://gitlab.gnome.org/GNOME/nautilus/issues/848