OpenDNS DNSCrypt Watch

dnscryptwatch

#!/bin/sh
PIDFILE=/var/run/dnscryptwatch.pid
BINPATH=/usr/sbin/dnscrypt-proxy -a 127.0.0.1:40
DNSCRYPT_PIDFILE=/var/run/dnscrypt.pid
# Check whether script is running, and if running, exit directly
if [ -s $PIDFILE ] && [ -s /proc/$(cat $PIDFILE)/exe ]; then
    exit 0
fi
# Fork current script to background daemon
if [ -z "$_BACKGROUNDED" ]; then
    _BACKGROUNDED=1 nohup $0 > /var/log/dnscryptwatch 2>&1 &
    exit 0
fi
# Main script
echo $$ > $PIDFILE
while :
do
    if [ -s $DNSCRYPT_PIDFILE ] && [ -s /proc/$(cat $DNSCRYPT_PIDFILE)/exe ]; then
        exit 0
    fi
    $BINPATH -p $DNSCRYPT_PIDFILE
done