Update time with date and curl commands from cloudflare

time-update.sh

#!/bin/sh
# Update time and date from cloudflare with curl and date commands.
# It is easy to use ntp is not installed servers.
# You can execute for one time update or execute with service arg to update every 600 second.

function updateDate {
  date -s"@$(curl ahmetozer.org/cdn-cgi/tracert -s | grep ts= | cut -d"=" -f2 | cut -d"." -f1)"
  if [ "$?" == "0" ]
  then
    updated="true"
  fi
}

if [ "$1" == "service" ] || [ "true" == "$service" ]
then
  while true
  do
    updateDate
    if [ "$updated" == "true" ]
    then
      sleep 600
    else
      sleep 30
    fi
  done
else
  updateDate
fi