Re: user flags in public temp space (was Re: chflags() [heads up])

[avalon () COOMBS ANU EDU AU (Darren Reed)]

In some mail from Tim Fletcher, sie said:
> > I think I defeated myself in trying to explain the implementation I was
> > trying to describe.  For each user, when they login, a virtual /tmp is
> > created and that is shared between all sessions that user has.  This is
> > setup at login time and is carried forth to all children, root or not,
> > and cannot be reset (somewhat akin to chroot) unless devious methods are
> > employed (i.e. write to /dev/mem).
> >
> > So if I have 10 logins to host foo, each login sees the same /tmp, even
> > the root shells I generate via su/sudo in half.  If I login as root, I
> > don't have the same /tmp (I get a different one).  cron/at jobs would
> > be no different.  So the `real' /tmp could even be 755 root.wheel.
>
> Although it does rather cripple /tmp in another way: That of sharing
> information between users. If I tell another user that the file s/he wants
> is in /tmp (as my /home/tim dir is 711 with most files 600) I don't have
> to mess with file perms and s/he doesn't have to get the exact right name
> to read the file.

Why do they need to access your home dir ?  You're making assumptions
which you probably shouldn't...