Shell script for checking "is server online?" with dependant action

[Guest cmonty]

Hello!

 

I'm asking for your support to create the correct syntax of a bash script that should provide the following function:

• every 30s it should check if a server (identified by its IP) is online
  
• starting with the first check call a information box should be displayed with a countdown
  
• this online-check should be repeated x times
  
• if the server is offline after x checks, then a corresponding error message should be displayed
  
• if the server is online after x-1 checks, there should be a specific action: opening Remmina and synchronizing a server-directory with local directory
  

 

 

I have "build" the following bash script, but I'm not sure if it will work as intended:

Code:

 

#!/bin/bash

#

#set -x

 

. /etc/vpn-connection.conf

 

logit() {

logger -p local0.notice -s -- VPN-Connect: $*

}

 

StartRemmina() {

remmina -c /home/${SYNC_USER}/.remmina/${REMMINA_CONFIG}

logit Remmina started with config file

}

 

SyncDirectory() {

rsync --delete \

-avzbe ssh ${SYNC_USER}${REMOTE_SERVER}:${SOURCE_DIR}/ ${DESTINATION_DIR}/ \

--backup-dir=${BACKUP_DIR}

logit Sync of directory Steuer-Sparbuch executed

}

 

DisplayMessage() {

COUNT=CHECK_REPEAT*CHECK_WAITTIME

START=${COUNT} # Set a start point

 

until [ "${COUNT}" -eq "0" ]; do # Countdown loop.

((COUNT-=1)) # Decrement seconds.

PERCENT=$((100-100*COUNT/START)) # Calc percentage.

echo "#Verbleibende Zeit$(echo "obase=60;$COUNT" | bc)" # Convert to H:M:S.

echo ${PERCENT} # Outut for progbar.

sleep 1

done | zenity --title "Countdown Start Remote-Server" \

--progress \

--percentage=0 \

--text=""\

--window-icon=${ICON} \

--auto-close # Progbar/time left.

if [ $? = 1 ]; then

exit $?;

fi

notify-send -i $ICON "Countdown > ## Zeit ist abgelaufen ##" # Attention finish!

#/usr/bin/canberra-gtk-play --volume 4 -f ${SOUND} # Ding-dong finish!

zenity --notification \

--window-icon="${ICON}" \

--text "Countdown > ## Zeit ist abgelaufen ##" # Indicate finished!

}

 

# Checking if Remote-Server is online

repeat=${CHECK_REPEAT}

 

while :; do

# If online then start Remmina and sync directory

nc -4nz -w 1 ${1:-192.168.178.10} ${2:-22} && \

SyncDirectory && \

sleep 2 && \

StartRemmina

DisplayMessage

repeat=$((repeat - 1))

test $repeat -gt 0 || logit Remote-Server is offline && exit

sleep ${CHECK_WAITTIME}

done

I would appreciate your input to complete this script.

 

THX

 

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