watchcat: add with myself as maintainer

Signed-off-by: Roger D rogerdammit@gmail.com

utils/watchcat/files/watchcat.sh

@@ -0,0 +1,69 @@
+#!/bin/sh 
+
+mode="$1"
+
+shutdown_now() {
+	local forcedelay="$1"
+
+	reboot &
+
+	[ "$forcedelay" -ge 1 ] && {
+		sleep "$forcedelay"
+
+		echo b > /proc/sysrq-trigger # Will immediately reboot the system without syncing or unmounting your disks.
+	}
+}
+
+watchcat_allways() {
+	local period="$1"; local forcedelay="$2"
+
+	sleep "$period" && shutdown_now "$forcedelay"
+}
+
+watchcat_ping() {
+	local period="$1"; local forcedelay="$2"; local pinghosts="$3"; local pingperiod="$4"
+
+	time_now="$(cat /proc/uptime)"
+	time_now="${time_now%%.*}"
+	time_lastcheck="$time_now"
+	time_lastcheck_withinternet="$time_now"
+
+	while true
+	do
+		# account for the time ping took to return. With a ping time of 5s, ping might take more than that, so it is important to avoid even more delay.
+		time_now="$(cat /proc/uptime)"
+		time_now="${time_now%%.*}"
+		time_diff="$((time_now-time_lastcheck))"
+
+		[ "$time_diff" -lt "$pingperiod" ] && {
+			sleep_time="$((pingperiod-time_diff))"
+			sleep "$sleep_time"
+		}
+
+		time_now="$(cat /proc/uptime)"
+		time_now="${time_now%%.*}"
+		time_lastcheck="$time_now"
+
+		for host in "$pinghosts"
+		do
+			if ping -c 1 "$host" &> /dev/null 
+			then 
+				time_lastcheck_withinternet="$time_now"
+			else
+				time_diff="$((time_now-time_lastcheck_withinternet))"
+				logger -p daemon.info -t "watchcat[$$]" "no internet connectivity for $time_diff seconds. Reseting when reaching $period"       
+			fi
+		done
+
+		time_diff="$((time_now-time_lastcheck_withinternet))"
+		[ "$time_diff" -ge "$period" ] && shutdown_now "$forcedelay"
+
+	done
+}
+
+	if [ "$mode" = "allways" ]
+	then
+		watchcat_allways "$2" "$3"
+	else
+		watchcat_ping "$2" "$3" "$4" "$5"
+	fi