topic Re: Inherit group from parent directory in Operating System - Tru64 Unix

Inherit group from parent directory

Steven Whatley — Fri, 04 Jun 2004 13:52:33 GMT

We have a scratch disk called /wrk on a Tru64 5.1B system formatted as advfs v4 that is group and world writable:

drwsrwxrwx 954 root system 40960 Jun 4 13:26 /wrk

If a user creates a file or directory directly under /wrk, its owner (UID) is the user's uid but the group name (gid) is still system:

-rw------- 1 me system 0 Jun 4 13:27 test.txt

How do I set up the permissions on /wrk so that my group name is used instead of system?

-rw------- 1 me grp1 0 Jun 4 13:27 test.txt

The reason I ask is because our users archive their files onto a storage array. We use the group name to determine how much space each group is using. As it is now, if a user copies his/uer files to the storage array the group name is still system.

I know we can tell the users to do a chgrp on new directories under /wrk but we would have to constantly police the users to make sure the policy is followed. There must be an easier way.

Any info will be appreciated.

Thanks,
Steven

Re: Inherit group from parent directory

Michael Schulte zur Sur — Fri, 04 Jun 2004 15:45:25 GMT

Hi,

there is one problem. You have only one group, you set /wrk to but probably many groups, the users belong to.
You might try this from time to time.
find /wrk -user "userx" -exec chgrp grp1 "{}" ";"

hth,

Michael

Re: Inherit group from parent directory

Abdul Rahiman — Fri, 04 Jun 2004 15:53:21 GMT

Miachae's solution is one way of getting around the problem.
But here is another solution, if /wrk is a filesystem, mount it with "nogrpid" option.

eg:
# mount -o nogrpid /wrk

man mount for more info.

Re: Inherit group from parent directory

Ralf Puchner — Fri, 04 Jun 2004 16:25:40 GMT

nogrpid has no effect on non nfs filesystems as I know....

But why not learn some basics and use vfs: sys_v_mode=1 (have a look into the admin guide, section BDS vs. SYSV behavior) or still use ACL's to solve your problem.

Re: Inherit group from parent directory

Abdul Rahiman — Fri, 04 Jun 2004 16:38:32 GMT

Ralph,
According to man pages, nogrpid works for UFS and AdvFS.
I just tested it too, it works. :-)

regds,
Abdul.

Re: Inherit group from parent directory

Steven Whatley — Fri, 04 Jun 2004 17:20:01 GMT

Ralf, Yes, /wrk is a file system. The nogrpid option looks like the ticket. We will give it a try.

Thanks,
Steven

Re: Inherit group from parent directory

Michael Schulte zur Sur — Sat, 05 Jun 2004 04:22:44 GMT

Steven,

Ralf was referring to nfs filesystem.

greetings,

Michael

Re: Inherit group from parent directory

Yong_7 — Mon, 07 Jun 2004 16:01:03 GMT

Hi steven,

if you do not have too MANY groups, how about create file set for each group under wrk_domain, then it's easy to tell how much space is used for each file set.

just a idea. also you can set limit too.

Cheers !

YJ

Re: Inherit group from parent directory

Abdul Rahiman — Mon, 07 Jun 2004 17:01:14 GMT

Steven,
Would appreciate if you could assign points to the replies as a way of thanking and indicating how the responses helped you in resolving the problem.

thanks,
Abdul.

Re: Inherit group from parent directory

Steven Whatley — Thu, 10 Jun 2004 15:18:13 GMT

Don't worry, I will assign points. Due to restrictions since thwese are poroduction boxes, I can't apply the fix until Monday. After that, I will assign points.

Thanks,
Steven