Bash Time setting and sync RPI VoidRealms Solved

#!/bin/bash

# script MD Harrington 2 May 2020
# Time 00:05hrs

# Variable name reminders

#
#   $0 - The name of the Bash script.
#   $1 - $9 - The first 9 arguments to the Bash script. (As mentioned above.)
#   $# - How many arguments were passed to the Bash script.
#   $@ - All the arguments supplied to the Bash script.
#   $? - The exit status of the most recently run process.
#   $$ - The process ID of the current script.
#   $USER - The username of the user running the script.
#   $HOSTNAME - The hostname of the machine the script is running on.
#   $SECONDS - The number of seconds since the script was started.
#   $RANDOM - Returns a different random number each time is it referred to.
#   $LINENO - Returns the current line number in the Bash script.




STD='\033[0;0;39m'        #reset
IRed='\033[0;91m'         # Red
IGreen='\033[0;92m'       # Green
IYellow='\033[0;93m'      # Yellow
IBlue='\033[0;94m'        # Blue
IPurple='\033[0;95m'      # Purple
ICyan='\033[0;96m'        # Cyan
IWhite='\033[0;97m'       # White

#global variable
CURRENTDATEONLY=`date +"%A, %b %d, %Y %H:%M:%S"`

#important must have this otherwise no go

FILE=/etc/ntp.conf
FILEBCK=/etc/ntp.conf.back

timedatectl | grep Time




show_menus() {

    clear
    echo -e "   ${IRed}**********************************************${STD}"
    echo -e "   ${IRed}*  Date : ${CURRENTDATEONLY}     *${STD}"
    echo -e "   ${IRed}*   Timezone and Synchronize System Clock    *${STD}"
    echo -e "   ${IRed}*              Bash Menu Driven              *${STD}"
    echo -e "   ${IRed}*          Written by MD Harrington          *${STD}"
    echo -e "   ${IRed}*                                            *${STD}"
    echo -e "   ${IRed}**********************************************${STD}"
    echo -e "   ${IGreen}1. Show Current Set Time Zone ${STD}"
    echo -e "   ${IPurple}2. Set Time Now {STD}"
    echo -e "   ${IBlue}3. Check Current Time and Date Status${STD}"
    echo -e "   ${IRed}4. NTP synchronized ${STD}"
    echo -e "   ${ICyan}5. Use Local TZ NTP Not Synced ${STD}"
    echo -e "   ${IWhite}6. Exit ${STD}"
}



pause(){

  read -p "Press [Enter] to continue..." p_EnterKey
}

GetCurrentTimeZone()
{
    echo "Time Zone is set to "
    echo ""
    timedatectl | grep Time
    pause

}


SetTimeNow()
{
   echo -e  "${IGreen}Set time  for NOW ${STD}"
   sudo systemctl stop  systemd-timesyncd.service
   sudo timedatectl set-local-rtc 1
   sudo timedatectl set-ntp false
   read -p "Input time duration of simulation in HH:MM:SS format " -e Time

    while :; do
        if [[ $Time =~ ^([0-9]{2}):([0-9]{2}):([0-9]{2})$ ]]; then
            if (( BASH_REMATCH[3] < 60 ))\
            && (( BASH_REMATCH[2] < 60 ))\
            && (( BASH_REMATCH[1] < 24 )); then
            break
        fi
    fi
   read -p "Wrong format. Please use the HH:MM:SS format " -e Time
   done

# Set Time with $Time
 timedatectl set-time $Time

 echo "Self check to see if time was set correctly "

 timedatectl

 pause

 timedatectl set-ntp true
 systemctl restart  systemd-timesyncd.service


}

checkstatus()
{
    echo -e  "${IPurple}Checking time and date status${STD}"
    timedatectl status


    pause

}

synchNTP()
{
    echo -e  "${IYellow}Synchronize NTP${STD} "
    sudo systemctl stop  systemd-timesyncd.service
    sudo timedatectl set-local-rtc 0

    timedatectl set-ntp true

    sudo systemctl restart  systemd-timesyncd.service

    echo -e "${IYellow}You may need to reboot the Raspberry Pi to apply this change${STD} "
    timedatectl status
    pause

}

UseLocalTZ()
{
    echo -e  "${ICyan}NB !! Using Local TZ and  not synced with NTP server ${STD} "
    sudo systemctl stop  systemd-timesyncd.service
    sudo timedatectl set-local-rtc 1

    sudo systemctl restart  systemd-timesyncd.service
    timedatectl status
    pause

}

QuitMenu()
{
    echo ""
    echo ""
    echo -e "   ${ICyan}**********************************************${STD}"
    echo -e "   ${ICyan}*      Thank you for using this menu         *${STD}"
    echo -e "   ${ICyan}*         Mark David Harrington              *${STD}"
    echo -e "   ${ICyan}**********************************************${STD}"

        sleep 1
          clear
            exit 0
}



read_options(){

    local choice
    read -p "Enter choice [ 1 - 6] " choice
    case $choice in
        1) GetCurrentTimeZone;;
        2) SetTimeNow ;;
        3) checkstatus ;;
        4) synchNTP;;
        5) UseLocalTZ ;;
        6) QuitMenu ;;
        *) echo -e "${RED}Error...${STD}" && sleep 2
    esac
}

# ----------------------------------------------
#  Trap CTRL+C, CTRL+Z and quit signals
# ----------------------------------------------

trap '' SIGINT SIGQUIT SIGTSTP

# -----------------------------------
# Main logic - infinite loop
# ------------------------------------
while true
do

    show_menus
    read_options
done