A watchdog for Pcap-DNSProxy on OpenWrt

pcap-dnsproxy-watchdog.sh

PROG=/usr/sbin/Pcap_DNSProxy
LOGTIME=$(date "+%Y-%m-%d %H:%M:%S")

if [ $(ps|grep ${PROG}|grep -v grep|wc -l) -ge 1 ]; then
	echo "['$LOGTIME'] Pcap_DNSProxy is running, PID is $(pidof ${PROG##*/})"
else
	echo "['$LOGTIME'] Pcap_DNSProxy is not running."
	/etc/init.d/pcap-dnsproxy start
fi

You can edit crontab tasks with:
crontab -e

Copy and paste:

# run every minutes 
* * * * * /root/pcap-dnsproxy-watchdog.sh >> /var/log/pcap-dnsproxy-watchdog.log 2>&1
# clean log every week at 1am
0 1 * * 7 echo "" > /var/log/pcap-dnsproxy-watchdog.log

Cron is not enabled by default, so your shell script won't be run scheduled. To activate cron:

/etc/init.d/cron start
/etc/init.d/cron enable

To clean dns:

/etc/init.d/pcap-dnsproxy flush
killall dnsmasq
/etc/init.d/dnsmasq start