On Sun, 3 Mar 2002 21:44, Janus Christensen wrote:
> Hello.
>
> I have recently purchased a M-Systems DiskOnKey, and while I can read
> from and write to it on my Linux box (RedHat 7.2, kernel 2.4.17), I am
> experiencing some problems with mounting the device.
>
> When I insert the device into the USB port an entry is created in
> /etc/fstab:
>
> /dev/sda1 /mnt/diskonkey auto noauto,owner,kudzu 0 0
>
> The only way I have been able to mount the device is with
>
> mount /dev/sda /mnt/diskonkey
>
> as root. If I try as any other user I get
>
> mount: only root can do that
>
> Whilst the device works when mounted as root and I can read from it with
> a normal user, I can only write to it if I su to root, which is rather
> annoying.
But is at least secure.
> I have the following questions for which I hope somebody on the list
> will have answers to:
>
> 1) Why can't I mount the device when I am logged in as a non-root user?
> The options in the fstab entry are the same as for the floppy device (as
> well as the filesystem type 'auto'), and this I can mount as any
> non-root user with
>
> mount /mnt/floppy
You should read relevant docs before posting. In this case, man mount tells
you the answer. Here is a verbatim extract from the man page on a RH7.2
install:
<quote>
(iii) Normally, only the superuser can mount file systems. However,
when fstab contains the user option on a line, then anybody can mount the
corresponding system.
Thus, given a line
/dev/cdrom /cd iso9660 ro,user,noauto,unhide
any user can mount the iso9660 file system found on his CDROM using the
command
mount /dev/cdrom
or
mount /cd
For more details, see fstab(5). Only the user that mounted a
filesystem can unmount it again. If any user should be able to
unmount, then use users instead of user in the fstab line. The owner
option is similar to the user option, with the restriction that the user
must be the owner of the special file. This may be useful e.g. for
/dev/fd if a login script makes the console user owner of this device.
</quote>
> Is it because the DiskOnKey device is a SCSI device?
Nope.
> 2) Where does the fstab entry come from in the first place? Kudzu?
> Hotplug? Any pointers on how to make configure the "thing" that creates
> the fstab entry so a non-root user can mount the device would be great.
Probably from kudzu, from the /etc/fstab line.
Brad
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