l i n u x - u s e r s - g r o u p - o f - d a v i s
Next Meeting:
July 7: Social gathering
Next Installfest:
Latest News:
Jun. 14: June LUGOD meeting cancelled
Page last updated:
2006 Oct 06 14:56

The following is an archive of a post made to our 'vox-tech mailing list' by one of its subscribers.

Report this post as spam:

(Enter your email address)
Re: [vox-tech] Apache and group permissions
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [vox-tech] Apache and group permissions

On Fri, 2006-10-06 at 14:38 -0700, Rod Roark wrote:
> Replying to myself:
> On Friday 06 October 2006 13:35, Rod Roark wrote:
> > I have a very puzzling (to me) problem.  I'm working with a Mandriva
> > box running Apache 2.0.54.  It runs as user nobody with its group ID
> > set to -1 -- i.e. httpd.conf includes:
> > 
> >     User nobody
> >     Group #-1
> It turns out if I change it to "Group nogroup", everything works.
> So is setgid(-1) supposed to disable group permissions?  I have never
> seen that documented....

No, it would probably set the group id to 65535 on most systems (which
is frequently called "nobody").

The problem is that the groups listed in /etc/group are "supplementary"
groups, and a simple setgid or setuid don't by themselves load the
supplementary group information for the new user into the kernel's
process table for that process. Something else is required, but I'm not
entirely sure what that something is for non-interactive scripts.

Micah J. Cowan
Programmer, musician, typesetting enthusiast, gamer...

vox-tech mailing list

LUGOD Group on LinkedIn
Sign up for LUGOD event announcements
Your email address:
LUGOD Group on Facebook
'Like' LUGOD on Facebook:

Hosting provided by:
Sunset Systems
Sunset Systems offers preconfigured Linux systems, remote system administration and custom software development.

LUGOD: Linux Users' Group of Davis
PO Box 2082, Davis, CA 95617
Contact Us

LUGOD is a 501(c)7 non-profit organization
based in Davis, California
and serving the Sacramento area.
"Linux" is a trademark of Linus Torvalds.

Sponsored in part by:
Appahost Applications
For a significant contribution towards our projector, and a generous donation to allow us to continue meeting at the Davis Library.