hi all. I have a little scripting problem.

here's what i've done so far
when a user logs in, the /etc/profile scripts kicks in and checks if the
user is root, it the user isn't root then it mounts an nfs export to
/var/spool/mail so the user hass access to global mail addressed to him.
when the user logs out the nfs export ius unmounted in .bash_logout

that works ok but
when i log in as me i may want to su as root. no nfs clients need mounting
in fact i need to be able to check if i am logged into root via su ot via
direct login. How do i do this?

Thanks

On Mon, 06 Jun 2005 10:32:00 +0000, Darren wrote:

> in fact i need to be able to check if i am logged into root via su ot via
> direct login. How do i do this?

Well with "direct login" your shell is a child of init, hence:

if [ "$PPID" -eq "1" ]; then
echo yep
else
echo nope
fi

However this catches any sub-shell (even if "-l" such as Xterm) as not a
direct login shell. If you only want to differentiate between "su" or not,
maybe something like:

TTY=`tty`
if [ "`ls -l "$TTY" |awk '{print $3}'`" == "$USER" ]; then
echo nope
else
echo yep
fi

--
-Menno.

"Menno Duursma" <pan@desktop.lan> wrote in message
newsan.2005.06.06.11.20.32.177294@desktop.lan...
> On Mon, 06 Jun 2005 10:32:00 +0000, Darren wrote:
>
> > in fact i need to be able to check if i am logged into root via su ot
via
> > direct login. How do i do this?
>
> Well with "direct login" your shell is a child of init, hence:
>
> if [ "$PPID" -eq "1" ]; then
> echo yep
> else
> echo nope
> fi
>
> However this catches any sub-shell (even if "-l" such as Xterm) as not a
> direct login shell. If you only want to differentiate between "su" or not,
> maybe something like:
the first one failed because even in s script it spawned a new instants of
the shell. I recall seeing something that was supposed to be able to run
scripts under the existing shell.. I can't remember where though
>
> TTY=`tty`
> if [ "`ls -l "$TTY" |awk '{print $3}'`" == "$USER" ]; then
> echo nope
> else
> echo yep
> fi
>
that one did the trick. Thanks

> --
> -Menno.
>