Path: utzoo!utgpu!watmath!att!tut.cis.ohio-state.edu!cs.utexas.edu!sun-barr!newstop!east!hinode!geoff
From: geoff@hinode.East.Sun.COM (Geoff Arnold @ Sun BOS - R.H. coast near the top)
Newsgroups: comp.protocols.nfs
Subject: Re: PC-NFS permissions
Message-ID: <648@east.East.Sun.COM>
Date: 31 Jul 89 19:42:07 GMT
References: <13415340TDD@MSU>
Sender: news@east.East.Sun.COM
Reply-To: geoff@hinode.East.Sun.COM (Geoff Arnold @ Sun BOS - R.H. coast near the top)
Organization: Sun Microsystems, Billerica MA
Lines: 21

In article <13415340TDD@MSU> 15340TDD@MSU.BITNET (Tom Davis) writes:
>Another PC-NFS question...  I have a file system "mounted" with PC-NFS and
>I am having difficulty "touching" a file from the PC.  If I have OWNER
>privileges on the file it works fine, but if I have GROUP privileges on
>the file it fails!  I have group privileges to the directory in both cases.
>What gives??

This seems to be an artefact of the NFS server implementation. When you
issue a SetAttributes call the server checks to see if you are the owner of
the file; if you are not, and you are trying to change certain key attributes,
the call is rejected. We ran into this when fixing a bug (NOT fixed in 3.0.1)
when a non-owner was trying to shrink a file. PC-NFS issues a SetAttributes
with the new file size, but incorrectly includes the permission bits
in the settable attributes structure. The NFS server rejects the whole
request and the file doesn't shrink.

Geoff

Geoff Arnold,                              Internet: garnold@East.Sun.COM
Manager, PC-NFS Engineering                UUCP: ....!sun!East!garnold
PCDS Group, Sun Microsystems Inc.