Messages in this thread | | | From | (Harald Koenig) | Subject | Re: Proposal: restrict link(2) | Date | Sat, 14 Dec 1996 01:24:38 +0100 (MET) |
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> Harald Koenig writes: > > * clobber other user's disk quoatas, disk usage and disk space accounting etc. > > No.
[ nonsense example deleted ]
> You have only a cursory understanding of how hard links work.
bull shit! I guess you don't have an idea about disk quotas and disk space accounting ??? usually you're not accounting disk space using "du"...
asume: /home/joe/BIGFILE is a big and $$$ file accessable to jim owned by jim
now jim makes a hard link from this file to /home/jim/hidden/let_joe_still_pay
now assume that joe deletes /home/joe/BIGFILE in order to save disk spaces accounted to his quota and probably $$$.
and now think again how ownes /home/jim/hidden/let_joe_still_pay, how probably has to pay for it and who can't do anything against this..
got the message?
or other example about access restriction: assume: jim and joe are in (some) same group(s)
/home/joe/project/world_shouldnt_read is a file that... so directory "project" can only be accesed using group permission (e.g. permission 770 or 750)
now jim (how is allowed to access project and thus project/world_shouldnt_read) want's to make spy's life easier: he creates a hard link from the file above to
/home/jim/donnation_to_the_world/TOP_SECRET where donnation_to_the_world ahs e.g. permissions 755. now world is able to access the data in the file "world_shouldnt_read" which wasn't planed at all from joe (using multiple differnet groups there are situations where you can't remove world acces from this file; access control is done through directories...)
and what about the message of this case ?
BTW: I still saw now reasonable argument why we *need* the ability that joe is allowed to create hard links to jim's files ?!
Harald -- All SCSI disks will from now on ___ _____ be required to send an email notice 0--,| /OOOOOOO\ 24 hours prior to complete hardware failure! <_/ / /OOOOOOOOOOO\ \ \/OOOOOOOOOOOOOOO\ \ OOOOOOOOOOOOOOOOO|// Harald Koenig, \/\/\/\/\/\/\/\/\/ Inst.f.Theoret.Astrophysik // / \\ \ koenig@tat.physik.uni-tuebingen.de ^^^^^ ^^^^^
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