On Fri, Apr 05, 2002 at 09:14:58PM -0600, Chris Devers wrote:
> >
> > > How I can make fink install into a shared network directory
> > > (e.g. a public home directory on our netinfo network) so
> > > others can run binaries from there..
> >
> root _cannot_ write to the shared directory. It's some weird NFS
> thing I don't really understand, but it's as designed.
>
> i.e. even if we're logged in as our netinfo acct, we have admin
> privs on our own (local) system, but NOT on NFS mounted directories.
>
For security reasons the default for mounted filesystems (NFS
and otherwise) is to dissallow root access (UID=0) from the client
machine. The mount command however, as options to override this
behavior.
>From the exports(5) man page:
User ID Mapping
nfsd bases its access control to files on the server
machine on the uid and gid provided in each NFS RPC
request. The normal behavior a user would expect is that
she can access her files on the server just as she would
on a normal file system. This requires that the same uids
and gids are used on the client and the server machine.
This is not always true, nor is it always desirable.
Very often, it is not desirable that the root user on a
client machine is also treated as root when accessing
files on the NFS server. To this end, uid 0 is normally
mapped to a different id: the so-called anonymous or
nobody uid. This mode of operation (called `root squash
ing') is the default, and can be turned off with
no_root_squash.
so, if you mount the shared directory w/ the 'no_root_squash' option,
you will be able to access as root from a client machine.
I don't know the netinfo syntax off-hand, but you can use the fstab
import facility to build the entry from a file in exports format,
e.g.:
/sw my.client.machine(rw,no_root_squash)
should let root on my.client.machine access /sw on the server w/ root
access.
I have not tested these instructions, but they should be close to correct.
rick
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