[Samba] Incorrect permissions on mount despite correct options
starrte at clarkson.edu
Sun Apr 18 07:48:11 GMT 2004
Thank you very much for at least that much information. I had not
looked at /etc/groups, doh. At least now I understand the source of the
problem. Hopefully from there I can make progress and perhaps with some
help from, as you called them, "the experts", I can disable this
feature and just have the volume inherit the permissions I want it to
have. Although I have to admit that is a nice feature and I'll have to
remember to take advantage of that. I feel really stupid not having
read more on this. I appreciate your information. I'll be reading much
more on that subject now! Thanks again and I hope to hear more replies!
- Tim Starr
On Apr 18, 2004, at 3:20 AM, Michael Carmack wrote:
> Tim Starr wrote:
>> The problem was that it was/is being mounted under the following
>> tstarr at host:~/mount$ ls -l
>> total 0
>> drwxr-xr-x 1 501 dialout 0 Apr 7 20:39 Audio
>> drwxrwxr-x 1 501 dialout 0 Apr 9 01:29 Desktop
>> Now I have no user 501 on my system and no dialout group either. Odd.
> With Linux kernel 2.6.x and 2.4.25+, CIFS Unix extensions are in
> effect, allowing you to view and manipulate Unix-y things like
> symlinks and suid/sgid files using Samba.
> This also has the effect that the Unix UIDs and GIDs from the server
> get passed to the client.
> If you look on the server, you'll see that "501" is the numeric ID for
> the user that actually owns the file. And though you may not be aware
> of it, you *should* have a group called "dialout" on the Linux
> machine. (Look at /etc/group to confirm.) You'll notice that the
> numeric ID for the "dialout" group on your Linux machine maps to the
> numeric ID for the file's group on the server.
> [In case you were wondering what the point of this is, these changes
> make Samba play nicer with Unix machines. It makes it possible to
> replace something like NFS with Samba.]
> In the 2.4 series (as of 2.4.25), the Unix extensions are an optional
> configuration of the Linux kernel (i.e. you enable or disable this
> when building the kernel). I haven't looked at 2.6 yet, but I suspect
> it's also optional there. I don't know whether you can turn this
> behavior off or on after the kernel is built (using a mount option or
> a /proc setting or something), as I just started using it myself.
> FWIW, I've encountered a couple pitfalls myself. I think maybe there
> are still some issues to work out, so if Samba was previously doing
> everything you needed it to and you don't need the Unixy features, you
> might want to use a kernel that has these entensions disabled.
> (Just a slight caution: I haven't spent a lot of time using Samba, so
> I may be a little off with some of the things I just said. If so,
> hopefully the experts will set the record straight.)
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