rand_check_poweroff.sh + random stuff

rootfs_overlay/rand_check_poweroff.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+set -ex
+/rand_check.out
+
+# Check if network is being replayed.
+#
+# TODO; requires internet to be up, which is done by inittab.
+# We could do this with a /etc/init.d/SXX file,
+# but how to both check that into git, and make it optional?
+#
+# https://superuser.com/questions/635020/how-to-know-current-time-from-internet-from-command-line-in-linux
+# Raw IP because was failing with hostname:
+# https://unix.stackexchange.com/questions/124283/busybox-ping-ip-works-but-hostname-nslookup-fails-with-bad-address
+# https://tf.nist.gov/tf-cgi/servers.cgi
+#
+#echo | nc 129.6.15.28 13
+
+# busybox's poweroff panics, TODO why. Likely tries to kill shell.
+# So just use our super raw command.
+/poweroff.out