nut: Make FSD really work

Forced shutdown of the UPS was not actually happening before
due to lack of specific commands doing the shutdown.  This
(and the nut-driver initscript) fix that.

Signed-off-by: Daniel F. Dickinson <cshored@thecshore.com>

net/nut/files/nutshutdown

@@ -0,0 +1,41 @@
+#!/bin/sh
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+. /lib/functions.sh
+
+mount -o remount,ro /overlay /overlay
+mount -o remount,ro / /
+
+stop_instance() {
+	/etc/init.d/nut-server stop "$1"
+}
+
+shutdown_instance() {
+	local cfg="$1"
+	config_get driver "$cfg" driver "usbhid-ups"
+	/lib/nut/${driver} -a "$cfg" -k
+}
+
+[ -f /var/run/killpower ] && {
+	[ -f /etc/config/nut_server ] && {
+		config_load nut_server
+
+		# Can't FSD unless drivers are stopped
+		config_foreach stop_instance driver
+		# Driver will  wait 'offdelay' before shutting down
+		config_foreach shutdown_instance driver
+		# So this can happen
+		poweroff
+		# And just in case
+		sleep 120
+		# Uh-oh failed to poweroff UPS
+		reboot -f
+	} || {
+		poweroff
+	}
+} || {
+	poweroff
+}