Capture a screenshot of XDM login screen?

Question

I would like to screenshot my XDM login screen on FreeBSD-CURRENT. It’s currently configured on ttyv8.

What I’ve tried:

I have tried xwd with various options from ttyv1, but it reports is cannot open the display.

I’ve had a crack at configuring xdmcp to screenshot from my Mac via X11 forwarding, but the background does not appear. The background is presented using qiv and is configured in Xsetup_n.

Having initially SSH’d onto the FreeBSD laptop with X forwarding enabled, the value of my DISPLAY variable was :10.0. I created an Xsetup_10 file (a straight copy from the Xsetup_0 file that works fine locally) and added the following line to /usr/local/lib/X11/xdm/xdm-config

DisplayManager._10.setup:  /usr/local/lib/X11/xdm/Xsetup_10

But this still didn’t work.

Question:

How can I screenshot my XDM login screen?

Answer 1

Set it to /etc/X11/xdm/Xsetup:

sleep 2 && import -w root /tmp/xdm.jpg &

It's will take screenshot through two seconds when xdm started and will place it to /tmp folder.