GNU bug report logs - #18946
a problem or a 'bug' about the command groups

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Eric Blake <eblake <at> redhat.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#18946: closed (a problem or a 'bug' about the command groups)
Date: Tue, 04 Nov 2014 17:06:02 +0000

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Your message dated Tue, 04 Nov 2014 18:04:55 +0100
with message-id <54590737.8040701 <at> redhat.com>
and subject line Re: bug#18946: a problem or a 'bug' about the command groups
has caused the debbugs.gnu.org bug report #18946,
regarding a problem or a 'bug' about the command groups
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


-- 
18946: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=18946
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Contact help-debbugs <at> gnu.org with problems

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From: yangzhao <plyang123 <at> 126.com>
To: bug-coreutils <at> gnu.org
Subject: a problem or a 'bug' about the command groups
Date: Tue, 4 Nov 2014 19:43:49 +0800 (CST)

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Excuse me,
             I use command 'group -d ' to delete   user  ak from a group  testgroup. Then ,something confusing comes to me.I use command groups as ak ,and get ak ,testgroup  ,them two. But when I use groups ak , I get ak only. And I take a look at /etc/group for testgroup ,there is nothing with ak,so I want to ask ,which file does command groups look up ?
                                                                                                                                                                                                                   Thanks,   
                                                                                                                                                                                                                Yours,sincerely

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From: Eric Blake <eblake <at> redhat.com>
To: yangzhao <plyang123 <at> 126.com>, 18946-done <at> debbugs.gnu.org
Subject: Re: bug#18946: a problem or a 'bug' about the command groups
Date: Tue, 04 Nov 2014 18:04:55 +0100

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tag 18946 notabug
thanks

On 11/04/2014 12:43 PM, yangzhao wrote:
> Excuse me,
>              I use command 'group -d ' to delete   user  ak from a group  testgroup. Then ,something confusing comes to me.I use command groups as ak ,and get ak ,testgroup  ,them two. But when I use groups ak , I get ak only. And I take a look at /etc/group for testgroup ,there is nothing with ak,so I want to ask ,which file does command groups look up ?

'groups' tells you the groups associated with the current process, which
is not necessarily the same as you would get by starting a new session
for that user.  'groups ak' tells you the groups that are associated
with the user name 'ak' as determined by an /etc/group lookup (or
similar action), which is what you would get when starting a new session.

Most likely, what happened is that in your testing, you have NOT YET
logged out and back in to start a new session.  Thus, the current
process is STILL associated with testgroup, even though new sessions
(and though 'group ak') will no longer be associated with testgroup.

Therefore, I'm marking this as not a bug, although you should feel free
to provide more details if I have missed something in guessing from your
brief description.

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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