This is the mail archive of the
cygwin
mailing list for the Cygwin project.
Re: Different commands give different groups
That makes sense, but I've completely restarted my computer and yet it still
shows the old groups. So a new process that uses the new groups hasn't
started. Any idea why?
eblake wrote:
>
> On 09/30/2011 09:49 PM, gsingh93 wrote:
>>
>> Why do these two commands give different groups? It's the same user.
>
> Because the effective gid set for the existing process differs from the
> recorded groups in /etc/groups - most likely, you've changed /etc/groups
> but haven't logged out and back in to start a new process hierarchy that
> uses the new groups.
>
>>
>> Gulshan@GSJK-PC /etc
>> $ id Gulshan
>> uid=1000(Gulshan) gid=545(Users) groups=545(Users),0(root)
>
> That's what the groups will be if a new process is started for Gulshan.
>
>>
>> Gulshan@GSJK-PC /etc
>> $ id
>> uid=1000(Gulshan) gid=545(Users) groups=545(Users),513(None)
>
> Whereas that's what the groups are now for the current process.
>
> This aspect of your situation is not cygwin-specific, the same behavior
> can be observed in other OSs when you change the user database after a
> particular user already has a process started.
>
>>
>> Furthermore, the commands mkgroup and mkpasswd give the orginial states
>> of
>> their corresponding files instead of what I changed them to. Why is that?
>
> This part is cygwin-specific - and the answer is that mkgroup and
> mkpasswd are querying Window's database of user information, not /etc
> (so that you can then populate /etc with information that matches the
> Window's database). Windows doesn't care what you put in /etc, so the
> amount of changes you can make in those files that still have a
> worthwhile visible effect to cygwin processes is a bit limited.
>
> --
> Eric Blake eblake@redhat.com +1-801-349-2682
> Libvirt virtualization library http://libvirt.org
>
> --
> Problem reports: http://cygwin.com/problems.html
> FAQ: http://cygwin.com/faq/
> Documentation: http://cygwin.com/docs.html
> Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
>
>
>
--
View this message in context: http://old.nabble.com/Different-commands-give-different-groups-tp32572751p32576391.html
Sent from the Cygwin list mailing list archive at Nabble.com.
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple