/usr/share/doc/runit/debian/ctrlaltdel is in runit 2.1.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | #!/bin/sh
PATH=/bin:/usr/bin
MSG="System is going down in 14 seconds..."
# echo 'disabled.' ; exit
touch /etc/runit/stopit
chmod 100 /etc/runit/stopit && echo "$MSG" | wall
/bin/sleep 14
|