removing /var/empty on a non-system disk

[Robert Bonomi]

> From owner-freebsd-questions at freebsd.org  Mon May 28 20:22:58 2012
> Date: Mon, 28 May 2012 19:17:38 -0600
> From: Gary Aitken <garya at dreamchaser.org.r-bonomi.com>
> To: freebsd-questions at freebsd.org
> Subject: Re: removing /var/empty on a non-system disk
>
> On 05/28/12 15:08, Robert Bonomi wrote:
>
> >>  From owner-freebsd-questions at freebsd.org  Mon May 28 14:10:55 2012
> >> Date: Mon, 28 May 2012 13:05:45 -0600
> >> From: Gary Aitken<freebsd at dreamchaser.org.r-bonomi.com>
> >> To: Polytropon<freebsd at edvax.de>
> >> Cc: freebsd-questions at freebsd.org
> >> Subject: Re: removing /var/empty on a non-system disk
> >>
> >> On 5/25/2012 4:01 PM, Polytropon wrote:
> >>>
> >>> I should have mentioned that I did the (successful) test
> >>> logging in as root (real console login). If you use "su -"
> >>> or "su root", the effect should be the same. You can always
> >>> check the success of your operation with the "ls -lo" command.
> >>
> >> Nope.  That was the problem.  I had logged in on the vty as normal user
> >> and done su root.  Had to back all the way out and log in on the vty as
> >> root to make it work.
> > 
> > I'm going to guess that you did 'su root', not 'su - root'.  The two commands
> > are *NOT* identical.   'su root' does not run the root 'login' scripts; thus
> > environment variables (including path, user, logname etc.) are *not* set as
> > they are on root login -- this causes some 'am i root' tests to fail.  OTOH,
> > 'su - root' should be equivalent to a root login in all respects.
>
> Thank you.  That explains a number of problems I've been having.  doh.
>
> > NOTE; there will be issues if the 'working directory' of a parent process is
> > the directory you are trying to delete.
>
> knew about that part
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