On Fri, Feb 25, 2011 at 02:05:07PM +0100, Samuel Thibault wrote:
>
> What Anton wants is to know whether X is currently at the front or not.
> And you can't rely on DISPLAY being set (since you could be from sudo su
> -), and you can't rely on stdin being the VT (since you could be from
> screen).
Testing the standard output and standard input never worked because they
are redirected by Debconf. In particular /usr/bin/tty outputs "not a tty".
For a long time the following code worked:
case `readlink /proc/self/fd/2` in
/dev/tty[0-9]*|/dev/vc/[0-9]*|/dev/console)
echo we ARE on the Linux console.
;;
*)
echo we are NOT on the Linux console.
;;
esac
Unfortunately for some time Debconf redirects even stderr and this code
no longer works.
Yes, dpkg-reconfigure could print a warning, but I suppose this would go
against the policy for proper Debconf use (Christian probably knows this
better).
Anton Zinoviev
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