[packages] add package watchcat: Allows to configure a periodically reboot, or after loosing internet connectivity

git-svn-id: svn://svn.openwrt.org/openwrt/packages@24692 3c298f89-4303-0410-b956-a3cf2f4a3e73

utils/watchcat/Makefile

@@ -0,0 +1,39 @@
+# 
+# Copyright (C) 2010 segal.di.ubi.pt 
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=watchcat
+PKG_VERSION:=1
+PKG_RELEASE:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/watchcat
+  SECTION:=utils
+  CATEGORY:=Utilities
+  TITLE:=Enable the configuration of programed reboots
+  MAINTAINER:=Nuno Goncalves <nunojpg@gmail.com>
+endef
+
+define Package/watchcat/description
+Allows to configure a periodically reboot, or after loosing internet connectivity. Configured trough UCI /etc/config/system
+endef
+
+define Package/watchcat/conffiles
+/etc/config/system
+endef
+
+define Build/Compile
+endef
+
+define Package/watchcat/install
+	$(CP) ./files/initd_watchcat $(1)/etc/init.d/watchcat
+	$(CP) ./files/uci_defaults_watchcat $(1)/etc/defaults/50-watchcat
+endef
+
+$(eval $(call BuildPackage,watchcat))

utils/watchcat/files/initd_watchcat

@@ -0,0 +1,139 @@
+#!/bin/sh /etc/rc.common
+
+START=01
+
+PIDFILE="/tmp/run/watchcat"
+
+append_string() {
+	local varname="$1"; local actual="${!varname}"; local add="$2"; local separator="${3:- }"
+	new="${actual:+$actual$separator}$add"
+	eval "$varname=\$new"
+}
+
+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="$4"
+	
+	time=$(cat /proc/uptime) && time=${time%%.*}
+	last=$time
+
+	while true
+	do
+		sleep $pingperiod
+	
+		time=$(cat /proc/uptime) && time=${time%%.*}
+		
+ 		for host in "$pinghosts" 
+		do
+			if ping -c 1 "$host" &> /dev/null 
+			then 
+				last=$time
+			else
+				diff=$((time-last))
+				logger -p daemon.info -t "watchcat[$$]" "no internet connectivity for $diff seconds. Reseting when reaching $period"	
+			fi
+		done
+
+		diff=$((time-last))
+		[ $diff -ge $period ] && shutdown_now "$forcedelay"
+	
+	done
+} 
+
+timetoseconds() {
+	local time=$1
+	unset seconds
+
+	{ [ "$time" -ge 1 ] 2> /dev/null && seconds="$time"; } || \
+	{ [ "${time%s}" -ge 1 ] 2> /dev/null && seconds="${time%s}"; } || \
+	{ [ "${time%m}" -ge 1 ] 2> /dev/null && seconds=$((${time%m}*60)); } || \
+	{ [ "${time%h}" -ge 1 ] 2> /dev/null && seconds=$((${time%h}*3600)); } || \
+	{ [ "${time%d}" -ge 1 ] 2> /dev/null && seconds=$((${time%d}*86400)); }
+}
+
+load_watchcat() {
+	config_get period	$1 period
+	config_get mode		$1 mode		"allways"
+	config_get pinghosts	$1 pinghosts	"8.8.8.8"
+	config_get pingperiod	$1 pingperiod	"600"
+	config_get forcedelay	$1 forcedelay	"0"
+
+	error=""
+
+	timetoseconds "$period"
+	period="$seconds"
+        [ "$period" -ge 1 ] \
+		|| append_string "error" "period is not set or not recognized" "; "
+        [ "$mode" = "allways" -o "$mode" = "ping" ] \
+		|| append_string "error" "mode must be 'allways' or 'ping'" "; "
+        [ -n "$pinghosts" -o "$mode" = "allways" ] \
+		|| append_string "error" "pinghosts must be set in 'ping' mode" "; "
+	timetoseconds "$pingperiod"
+	pingperiod="$seconds"
+	[ "$pingperiod" -l "$period" -o "$mode" = "allways" ] \
+		|| append_string "error" "pingperiod is not recognized" "; "
+	[ "$forcedelay" -ge 0 ] \
+		|| append_string "error" "forcedelay must be a integer greater or equal than 0, where 0 means disabled" "; "
+
+	[ -n "$error" ] && { logger -p user.err -t "watchcat" "reboot program $1 not started - $error"; return; }
+
+	if [ "$mode" = "allways" ]
+	then
+		watchcat_allways "$period" "$forcedelay" &
+	else
+		watchcat_ping "$period" "$forcedelay" "$pinghosts" "$pingperiod" &
+	fi
+
+	echo $! >> "$PIDFILE".pids
+	
+	logger -p user.info -t "sshtunnel" "started tunnels to $server (pid=$!;retrydelay=$retrydelay)" 
+}
+
+stop() {
+        if [ -f "$PIDFILE".pids ]
+        then
+                logger -p user.info -t "watchcat" "stopping all reboot programs"
+                
+                while read pid
+                do
+			kill $pid
+		done < "$PIDFILE".pids
+
+		rm "$PIDFILE".pids
+
+                logger -p user.info -t "watchcat" "all reboot programs stopped"
+        else
+                logger -p user.info -t "watchcat" "no reboot programs running"
+        fi
+}
+
+start() {
+	[ -f "$PIDFILE".pids ] && stop
+        
+	config_load system
+	if [ -n "$(uci show system.@watchcat[0])" ] # at least one watchcat section exists
+	then        
+		logger -p user.info -t "watchcat" "starting all reboot programs"
+		config_foreach load_watchcat watchcat
+		logger -p user.info -t "watchcat" "all reboot programs started"	
+	else
+		logger -p user.info -t "watchcat" "no reboot programs defined"
+	fi
+}

utils/watchcat/files/uci_defaults_watchcat

@@ -0,0 +1,7 @@
+#!/bin/sh
+uci add system watchcat
+uci set system.@watchcat[0].period=6h
+uci set system.@watchcat[0].mode=ping
+uci set system.@watchcat[0].pinghosts=8.8.8.8
+uci set system.@watchcat[0].forcedelay=30
+uci commit