[kwlug-disc] mount changes mount point (dir) permissions to root, root - how to affect?

[Chris Craig]

Maybe something like this would work:
mount ... -o gid=users

The mount options specified with "-o" certainly affect the mount point...

It's generally the permissions of the device being mounted that take
effect, not the mount point. Umask does take effect, but if it's more
permissive than the device permissions then it won't be noticed. You
can add ",umask=000" to the mount "-o" option if you find it does
cause a problem.

On 25 November 2013 16:22, unsolicited <unsolicited at swiz.ca> wrote:
> If I mount something from the command line (win share at this point), the
> owner/group on the dir, e.g. /mnt/here, change from what was set, to
> root/root, and a non-root user can't get past it (I think), to the files
> below it. (I say I think because I can set owner/group however I want, but
> since it goes to root/root, and I'm not root at use point, "a non-root user
> can't get past it (I think)"
>
> What (prep) do I need to set before mounting so instead of root/root it
> stays something useful, like root/users. (Yes, that assumes users and
> permission are set up reasonably.)
>
> Also, chown after mounting is ineffective - permission denied, even as root.
>
> I'm missing some element, and Google fu not working for me here -
> suggestions?
>
> e.g.
>
> Before: drwxrwsr-x  2 me   users ... x
>  After: drwxrwx--x  1 root root  ... x
>
> I'd be ok with this, if but the group were still users.
>
> To contrast, mkdir and touch (as root) result in:
>
> drwxrwsr-x  2 root users ... newdir/
> -rw-rw-r--  1 root users ... newfile
>
> Note: Sorry, don't mean to be rude, but a lot of non-answers searching
> google, burying what I'm looking for.
> - there is no fstab entry, nor do I wish there to be, for this one off.
> Therefore I have to be root to mount anything.
> - the mount options are not germane, they apply to the files under the
> mountpoint (which are fine), not to the mountpoint itself.
> - not interested in alternate solutions, e.g. gvfs, nor mounting anywhere
> other than under /mnt. Looking to find out what basic fact I'm missing about
> mounting this way.
>
> umask doesn't seem to be in play. (Correct me if I'm wrong, please.)
>
> There is no umask equivalent for directories - such stem from umask. [Not
> that that is even germane, here.]  (Correct me if I'm wrong, please.)
>
> Setting 777 on the  directory, before mount, is ok? (Not that it gets me
> anywhere.) Since mount options set file permissions for stuff under the
> mountpoint? [Except, I would have thought o+x would let me traverse it to
> the point where those mount option file permissions would take effect - at
> this point, I can't even get (read) to the mount point in konqueror as the
> user.]
>
>
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