dnscrypt-proxy

#!/bin/sh /etc/rc.common
# init.d script by chuacw 18-24 Apr 2018
# from https://github.com/chuacw/DNS-over-HTTPS-for-OpenWRT
# Place in /etc/init.d

# starts before dnsmasq starts
START=18
# stops before networking stops
STOP=89
cmd="/usr/sbin/dnscrypt-proxy"
name=$(basename $(readlink -f $cmd))
appname="DNSCrypt proxy"
stdout_log="/var/log/$name.log"
pid_file="/var/run/$name.pid"
stderr_log="/var/log/$name.err"
arguments="-config /etc/config/dnscrypt-proxy.toml -logfile $stdout_log"
start_cmd="start-stop-daemon -b -S -m -p $pid_file -x $name -- $arguments"
stop_cmd="start-stop-daemon -K -p $pid_file"
suppress_output="false"

# comma separated values of additional supported commands
EXTRA_COMMANDS="regenpid status reset"
# each command is as follows: <tab><command><tab>descriptive text
EXTRA_HELP="	regenpid	Regenerates the PID file if the process exists.
	reset	Resets the process status / removes the PID file.
	status	Shows the status

$1 init.d script (c) 2018 chuacw - https://github.com/chuacw"

reset() {
  pid=$(eval "pgrep dnscrypt-proxy")
  if [ -z "$pid" ]; then # if it's empty, ie, no such process exist
	  rm $pid_file &> /dev/null
	  if [ $suppress_output != true ]; then 
		echo "Status reset."
	  fi
  else
    echo "Can't remove PID because process still running."
  fi
}

# Rereates the PID if the process is still running, and the PID file has been deleted
regenpid() {
	pid=$(eval "pgrep dnscrypt-proxy")
	if [ ! -e $pid_file ]; then
		if [ -n "$pid" ] && [ -e /proc/$pid ]; then
		  echo $pid > $pid_file
		  echo "PID regenerated."
		else
		  echo "Process doesn't exist."
		fi
	else
	  echo "Cannot regenerate PID file as it still exists."
	fi
}

status() {
  echo "Checking status"
# check if the file exist, then check if /proc/PID exist
  if [ -f $pid_file ] && [ -d /proc/$(eval "cat $pid_file") ]; then
    echo "$appname running..."
    eval echo "Process ID: " $(cat $pid_file)
  else
    echo "$appname not running..."
  fi
}

start() {
  echo "Starting $appname..."
  if [ ! -f $pid_file ]; then
    $start_cmd
    #for debugging
    # echo "See ps result for confirmation"
    # ps | grep "$name"
  else
    echo "$appname already running..."
  fi
}

stop() {
  echo "Stopping $appname"
  if [ -f $pid_file ]; then
    pid=$(eval "cat $pid_file")
    $stop_cmd &> /dev/null 
    while [ -f $pid_file ] && [ -d /proc/$(eval "cat $pid_file") ]
    do
      sleep 1
      echo -n .
    done
    echo "$appname stopped."
    #for debugging
    # echo "See ps result below for confirmation"
    # ps | grep "$name"
    # redirect stdout including errors
    rm $pid_file &> /dev/null
  else
    echo "$appname not running..."
  fi
}