Re: which group ?

[David Frey <david@eos.lugs.ch>]

Hi Christian,

> I looked at the dump package and found out that /sbin/dump and
> /sbin/restore are in the group tty. Why are they in tty, shouldn't it
> be disk ?

No. dump/restore wants to be in tty in order to be able to notify the 
operator that (s)he has to change tapes.
The operator has to have disk access, either by being root or being in
the disk group. Something like

-rwsr-sr-x   1 root     disk         38653 May  1 22:44 /sbin/dump
-rwsr-sr-x   1 root     disk         59125 May  1 22:44 /sbin/restore   

would be a security disaster, since anybody could backup your system and
restore the interesting files (a la /etc/shadow).
(if rdump/rrestore didn't exist dump/restore needn't the SUID bit).

David


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