Adduser devel - Aug 2008 - Bug#496683: adduser assigns wrong group if setgid=set in parent

Package: adduser
Version: 3.102
Severity: important


The home directory that adduser creates does not properly inherit the 
group name from its parent (when setgid is set).
 
ie:
In the adduser.conf file, I have DIR_MODE="2770", and the parent 
directory in which the user''s dir. is created is mode=2771.
When adduser creates the home dir. its GID is set to the users'' group, 
not the parent dir''s group.
If DIR_MODE="0770", the users'' dir. is not setgid=yes

-- System Information:
Debian Release: 4.0
  APT prefers stable
  APT policy: (500, ''stable'')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-4-686
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)

Versions of packages adduser depends on:
ii  debconf [debconf-2.0]       1.5.11etch2  Debian configuration management sy
ii  passwd                      1:4.0.18.1-7 change and administer password and
ii  perl-base                   5.8.8-7etch3 The Pathologically Eclectic Rubbis

adduser recommends no packages.

-- debconf information:
  adduser/homedir-permission: true

severity 496683 normal 
thanks

This one time, at band camp, Bob Goldberg said:
> Severity: important
Interesting, but doubtful.
> The home directory that adduser creates does not properly inherit the
> group name from its parent (when setgid is set).
> ie: In the adduser.conf file, I have DIR_MODE="2770", and the
parent
> directory in which the user''s dir. is created is mode=2771.  When
> adduser creates the home dir. its GID is set to the users'' group,
not
> the parent dir''s group.  If DIR_MODE="0770", the
users'' dir. is not
> setgid=yes
Parse error.  Can you explain what you mean?

Adduser makes the directory, then chowns/chgrps it the new user and
group.  

I think you''re trying to say that you expect to be able to set the
parent directory setgid, and the new home directories adduser creates
will also have this group (and/or be setgid) even when the config file
settings say to do something else.  If that''s actually what
you''re
saying, I''m afraid it won''t work like this.
-- 
 -----------------------------------------------------------------
|   ,''''`.                                            Stephen
Gran |
|  : :'' :                                        sgran at debian.org |
|  `. `''                        Debian user, admin, and developer |
|    `-                                     http://www.debian.org |
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On Tue, Aug 26, 2008 at 09:10:30PM +0100, Stephen Gran
wrote:
> This one time, at band camp, Bob Goldberg said:
> > The home directory that adduser creates does not properly inherit the
> > group name from its parent (when setgid is set).
> > ie: In the adduser.conf file, I have DIR_MODE="2770", and
the parent
> > directory in which the user''s dir. is created is mode=2771. 
When
> > adduser creates the home dir. its GID is set to the users''
group, not
> > the parent dir''s group.  If DIR_MODE="0770", the
users'' dir. is not
> > setgid=yes
> 
> Parse error.  Can you explain what you mean?
Hi Bob, can you please try to answer the questiont hat Stephen asked
three years ago?

I plan on closing this bug by the end of 2011 if you don''t explain.

Greetings
Marc

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