watchcat: add with myself as maintainer

[feed/packages.git] / utils / watchcat / files / watchcat.sh

diff --git a/utils/watchcat/files/watchcat.sh b/utils/watchcat/files/watchcat.sh
new file mode 100644 (file)
index 0000000..ee9b6bd
--- /dev/null
+++ b/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