Subject: Re: "Don't login as root, use the su command."
To: Andrew Brown <firstname.lastname@example.org>
From: David Brownlee <email@example.com>
Date: 02/17/2000 12:12:12
On Wed, 16 Feb 2000, Andrew Brown wrote:
> > That would also work fine...
> > The SU_FROM avoids anything on /usr in root's dotfiles, and the
> > (insignificant) overhead of running an extra process.
> um....heh. if you can't use logname, you can't use su. su's is
> /usr/bin as well, ya know. :)
Indeed - but the .login file can be executed without /usr
mounted when csh is started in single user mode.
That can be fixed by using:
if ( -x /usr/bin/logname ) then
if (`logname` == root ) echo message
> > There is not much to choose between them, but I'm inclined to
> > stick with SU_FROM because its already there :)
> well...only because it was recently put there, no? besides, wouldn't
> using logname be much more incredibly portable? isn't portability a
> good thing?
What should happen in the (albeit interesting :) case of:
login as root (get message)
su root (should you get the message?)
I think SU_FROM has slightly better semantics (account is an
'su') rather than logname (initial login on this terminal),
but I'm probably biased as I introduced it :)