admin can also start tmux and su to admin in his tmux session :-)
Gilles
On Thu, Sep 03, 2009 at 02:58:13PM +0200, Jan Stary wrote:
> While switching from screen to tmux and trying out things,
> I noticed that being su'd to another user (who does not
> own the terminal I am running in) I cannot start tmux:
>
> $ id
> uid=1000(hans) gid=1000(hans) groups=1000(hans), 0(wheel), 5(operator)
>
> $ su - test
> Password:
>
> $ id
> uid=1001(test) gid=999(test) groups=999(test)
>
> $ tmux
> open terminal failed: /dev/ttyp4: Permission denied
>
> $ ls -l `tty`
> crw--w---- 1 hans tty 5, 4 Sep 3 14:41 /dev/ttyp4
>
> This happens on both 4.5 (tmux package) and 4.6 (base tmux).
> (In fact, screen behaves the same in this respect.)
>
> Obviously, this doesn't apply when I am su root, which
> - luckilly - is the most common case of using tmux for me.
> But I believe the following is a pretty common situation:
> an admin is only allowed to log in remotely via his 'regular'
> user account (say, 'joe'). Once he's logged in, he su's to
> 'admin' (who is in wheel and all that), and does his thing.
> Now, what if the 'admin' work calls for tmux? 'admin' cannot
> run tmux, because his terminal is owned by joe:tty.
>
> Is this a problem? If so, what would be the most elegant
> way of allowing su'd users to run tmux?
>
> Thanks for your time
>
> Jan
>
--
Gilles Chehade
freelance developer/sysadmin/consultant
http://www.poolp.org
